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Oil resistant o-rings on the basis of acrylonitrile butadiene rubber (NBR) reinforced by nanoclay were produced via a traditional industrial method in accordance with aviation standard, AMS 7272. The production of nanocomposites comprised the compounding of nanocomposite with optimum mechanical properties and minimum contents of used carbon black and nanoclay, design and manufacturing of the required mold and finally compression molding of the oring. Mechanical and morphological properties of NBR/nanoclay compounds were optimized by introduction of proper contents of a compatibilizer containing a mixture of resorcinol and hexamethylene tetramine through using a master batch production method. The prepared nanocomposites were characterized using X-ray diffraction (XRD) analysis, curing measurements and tensile test analysis. The XRD analysis showed that the compatibilizer facilitates the intercalation of nanoclay silicate layers with the rubber chains which leads to the increase of their basal spacing. The cure characteristics of the nanocomposites showed a decrease of scorch time and increase the cure rate index with the nanoclay loadings. Furthermore, the minimum scorch time and maximum cure rate index could be achieved through using the appropriate content of compatibilizer. The results exhibit that the nanocomposites containing the compatibilizer have higher mechanical properties especially at higher deformations compared to the corresponding uncompatibilized nanocomposites

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Research subject:Well-designed plastic foams, with respect to their cell density and cell size, open-or-close cells, and the cell uniformity, compared to their counterpart unfoamed plastic parts, beside of having the advantages of less material consumption, dimensional stability, better processability, and a higher surface quality, they can have superior mechanical and physical properties, including strength to weight, impact strength, thermal and dielectric properties. The temperature distribution in the different zones of the extruder, the qualities and quantities of the nanoparticle additives and their dispersion in the polymer matrix can have significant effect on the mechanical properties of the produced foams by the extruder.
Research approach: In this study, using an extruder, MA-g-polypropylene microcellular foams, containing 3, 7 and 9 wt% of nano-clay particles, were produced under three temperature arrangements on the extruder and the material and the processing effects on the mechanical properties were investigated.  
Main results: The result of this investigation shows that adding of nanoclay improves the mechanical properties of MA-g-PP.s foams. As an example, the results show that the sample with 7 wt% of surface modified nanoclay, owns about 10% higher impact toughness compared to the samples produced without nanoclay. Also for the same samples a rise of about 5% was recorded in Young's modulus. The microstructural studies of the produced foams by scanning electron microscope (SEM) show that adding of nanoclay can result on more foam uniformity and smaller cell size. In this study, the smallest average cell size (87.5 μm) and the lowest density (0.3 g/cm³) were recorded for a sample with 7wt% nanoclay.

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In this paper, the influence of nanoclay Closite 30B on ballistic impact behavior of 2D woven E- Glass/Epoxy laminated composite has been investigated experimentally. The glass/epoxy/nanoclay laminate nanocomposites have 12 layers and 60% fiber volume fraction is manufactured by VRTM method. Fibers have a plain weave configuration with density of 200gr/m2, while The epoxy resin system is made of a diglycidyl ether of bisphenol A (DGEBA), Epon 828, as the epoxy prepolymer and a polyoxypropylene diamine with average molecular weight of 400 gr/mol, Jeffamine D-400, as the curing agent. The nanoclay Closite 30B is dispersed into the epoxy system in a 0%, 1%, 2%, 3%, 5% and 7% ratio in weight with respect to the matrix. Morphological studies using XRD revealed that nanostructures are mostly in intercalated form rather than exfoliated form. In additional to tensile test, ballistic impact test is carried out on the samples by flat-ended projectile with 14gr mass and 9.77mm diameter in 130m/s, 142m/s and 155m/s velocities. The results have shown that not only the mechanical properties, but also ballistic impact resistance can be improved with adding nanoclay.

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The objective of this work was to investigate the effect of nanocaly on fatigue life of air spring. The studies on the air spring fatigue life have shown that the inner layer of the rubber composite bellows of the air spring plays the most important role on its fatigue life. So, as a new idea to improve the life of the air spring, in this research, NR/BR and 0, 3, 5, 7 % of nanoclay were separately melt-blended. X-ray diffraction was employed to characterize the nanocomposite morphology. Then, the curing time of the unvulcanized compound was defined by rheometer test and the final nanocomposites compounds were provided according to their curing characteristics. After that, tensile, heat built-up, tear and fatigue tests were performed on the standard test specimens. It was shown that by increasing the nanoclay percentage, the elasticity modulus, tear strength and heat built-up were increased whereas tensile strength and elongation at break point were decreased. The results also showed that by the addition of 3 % and 5 % of nanocaly to NR/BR, its fatigue life was increased about 33 % and 57 %, respectively, whereas the fatigue life of the compound containing 7 % nanoclay was decreased about 14 %.

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In this paper, the influence of nanoclay Closite 30B on ballistic impact behavior of 2D woven E- Glass/Epoxy laminated composite has been investigated experimentally. The glass/epoxy/nanoclay hybrid laminate nanocomposites are manufactured by layup method under pressure. The nanoclay particles are Closite 30B and are dispersed into the epoxy system in a 0%, 3%, 5%, 7% and 7% ratio in weight with respect to the matrix. In additional to tensile test, ballistic impact test is carried out on the samples by flat-ended projectile with 8.9gr mass and 10mm diameter in 134m/s and 169m/s velocities. The results have shown that not only the mechanical properties, but also ballistic impact resistance can be improved with adding nanoclay.

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Recently, the study of nano materials in different fields of engineering science has been widely performed. In fact, the study on the behaviour of mixtures of nano material with other materials is among the new horizons in engineering research works. In this paper the impact of nanoclay on consolidation behaviour of bentonite in the presence of heavy metal contaminant is investigated. For this purpose, different percentages of nanoclay were mixed with bentonite and were additionally mixed with different concentrations of copper nitrate. Then, the odometer experiments performed on these prepared homogeneous samples in order to study the consolidation and permeability variations of samples. The results of this study show that the presence of industrial nanoclay causes an increase on the osmotic settlement of samples at the heavy metal concentrations up to 30 cmol/kg-soil of copper nitrate in comparison to the settlement of bentonite. Furthermore, the addition of industrial nano-clay to bentonite causes an increase in permeability of sample in comparison to the permeability of bentonite. This difference is more noticeable at high concentration of heavy metal. In addition, with an increase in external pressure, the permeability of bentonite sample and mixtures of bentonite/nanoclay gets closer to each others. This behaviour has been attributed to the presence of clay particles with nano dimensions in the mixtures of nanoclay-bentonite, the cation exchange capacity (CEC) and specific surface area (SSA) variations of samples due to the presence of nanoclay. In other words, according to the results of this study in the process of settlement of mixtures of bentonite and nano clay in the presence and absence of heavy metals the cation exchange capacity and specific surface area have the significant role. In this regard at the low concentration of heavy metals at the effective stress less than 100 kPa, cation exchange capacity governs the soil behaviour. However, at the effective stress more than 100 kPa, specific surface area is the governing factor which controls soil consolidation performance. Once the concentration of heavy metal increases in which it overcomes the soil buffering capacity, the heavy metals will neutralize negative charge of clay particles. Therefore, the cation exchange capacity of soil will have low effect on the settlement behaviour of soil. In such a case the specific surface area governs soil settlement process. For this reason due to the larger surface area of nano clays, the possibility for the secondary consolidation of soil increases.

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In this paper, the influence of nanoclay Closite 30B on ballistic impact behavior of 2D woven E- Glass/Epoxy laminated composite has been investigated Theoretical and experimentally. The structure of the hybrid nanocomposite is glass/epoxy/nanoclay laminate and is manufactured by hand layup method under pressure. The nanoclay is dispersed into the epoxy system in a 0%, 3%, 5%, 7% and 7% ratio in weight with respect to the matrix. Comparison of theoretical results and results of the ballistic impact test are shown a good correlation. The results have shown that optimal to increase in energy absorption is 10% in 3% nanoclay content. Howevere, in the impact velocities far than ballistic impact, maximum increasing in energy absorption is 20% in 10% nanoclay content.

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In this study, low soluble and mechanical-tension resistant nanocomposite films were developed by adding different concentrations (5, 10 and 15% dw) of nanoclay type Cloisite Na⁺ (CNa⁺) to the soy flour polysaccharide. In order to investigate the physico-mechanical, structural and thermal properties of the developed nanocomposite, it has been synthetized by soluble molding method. When the nanoclaywas added to the biopolymer film, water solubility decreased, although the aforementioned trend was more significant when the concentration of the nanoclaywas raised. The film transparency was significantly declined when the nanoclay was added. By adding the nanoparticle, the film strength increased and this was increased when the nanoparticle concentration increased. Elongation at break decreased when the nanoparticle concentration was increased. The XRD results indicate that pure film specimen is amorphous whereas the biopolymer structure is becoming order and crystallinity increased when the nanoparticle was increased. These results revealed the peaks shifting to the lower degrees, increasing the interspace between nanoclaylayers and intercalation. From morphological point of view, a homogenous texture caused by adding nanoparticle to the polymer matrix was investigated using SEM. This study aimed to be successful for using the soy polysaccharide film as well as nanoparticle in order to introduce a new film in which used for nanocomposite synthetize.  

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: This paper investigated experimentally the effect of nanoclay on ballistic impact behavior of GLARE. The prepared GlARE is made of two Aluminum 2024 facing sheets and E glass/ epoxy/nanoclay as nano composite core. Nano composite section has been composed of undirectional E glass 409 g/m2, resin CY 219, hardner HY 5161 and nanoclay closite 30B dispersed into the epoxy system in a 0%, 4%, 7% and 10% ratio in weight with respect to the matrix. All panels fabricated using laid-up method in fiber volume fraction of 60%. Ballistic tests were conducted using Gas gun at the velocity of 205 and 225 m/s. The results of the ballistic impact experiments show that the amount of Specific energy absorption variations in 4% of nanoclay content is insignificant. However, in nanoclay contents of 7% and 10%, the Specific energy absorption increases. To analyze the results of the ballistic impact on the GLARE, the effect of nanoclay on the longitudinal and transversal mechanical properties of the composite was investigated. A noticeable correlation was found between ballistic impact results and Changes of toughness in longitudinal and transversal direction.

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In this paper, the influence of nanoclay Closite 30B on the tensile and the bending properties of 2D woven E- Glass/Epoxy laminated composite have been investigated experimentally. The glass/epoxy/nanoclay laminate have 12 layers and 60% fiber volume fractionis is manufactured by VRTM method. Fibers have a plain-weave configuration with density of 200 gr/m2, while the nano-epoxy resin system is made of diglycidyl ether of bisphenol A (epon 828) resin with jeffamine D400 as the curing agent and an organically modified MMT in a platelet form, namely Closite 30B. The nanoclay is dispersed into the epoxy system in a 0%, 3%, 5%, 7% and 7% ratio in weight with respect to the nano-matrix. The results have shown that Maximum to increase in the tensile and the bending properties are in 3% and 10% nanoclay content. The maximum to increase in the tensile strength, the failure strain and toughness are 13%, 7% and 27% respectively in 7% nanoclay content and in the modulus is 9% in 3% nanoclay content. Moreover, the maximum to increase in the flexural strength is 11% in 3% nanoclay content and in flexural modulus is 48% in 5% nanoclay content.

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In this paper, the tensile properties of 2D woven glass epoxy composite reinforced by two different nanoparticles have been investigated and compared. Hand lay-up method has been used to manufacture nanocomposites with 12 layers of 2D woven glass fibers with 40% fiber volume fraction. The nano-epoxy resin system is made of epon 828 resin with jeffamine D400 as the curing agent. The composites were reinforced by adding organically modified montmorillonite nanoclay (Closite 30B) and nanosilica (SiO2) particles. The nanoclay particles were dispersed into the epoxy system in a 0%, 3%, 5%, 7% and 10% ratio in weight with respect to the matrix, while the spherical nanosilica particles were dispersed into the epoxy system in a 0%, 0.5%, 1% and 3% ratio in weight with respect to the matrix. The results show that low loading of nanoclay decreases the mechanical properties of nanocomposite, while significant improvements of nanocomposite mechanical properties are shown in low loading of nanosilica. Tensile strength and toughness of nanocomposite increase by 7% and 10% after adding 5 wt.% nanoclay. Loading of 0.5 wt.% nanosilica cause 10% and 27% improvement in tensile strength and toughness of nanocomposite.

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Permanent deformation or rutting in wheel paths is one of the most important failure modes in asphalt pavements that affect the pavement life . Permanent deformation in asphalt mixtures can be defined as the unrecoverable cumulative deformation that occurs mainly at high temperatures in the wheel paths as a result of repeated traffic loading . The deformation results in depressions on the pavement surface along the wheel tracks relative to other points on the surface . Permanent deformation in wheel paths is one of the fundamental defects that occur due to lack of bearing capacity in flexible pavement layers . This type of defect usually occurs in the roads in the tropical areas . Rutting occurs due to cumulative non - reversible Permanent deformations in the pavement layers under repeated traffic loading . In order to increase pavement life and consequently decrease maintenance related traffic delays , great demands are placed on permanent deformation resistance of asphalt mixtures . Hot Mix Asphalt is composed of aggregates and asphalt binder . Properties of these materials have important effects on the pavement structure performance. Although , asphalt binder is a little part of mixture ( in comparison with aggregates ) , but has major effects on the performance , durability and stability of the asphalt concrete mixture . Any change in asphalt properties will result significant changes in the asphalt concrete mixture performance . Since asphalt cement ( AC ) never fully satisfying lacks the physical and mechanical properties , researchers are constantly trying to improve the asphalt cement properties . Asphalt cement modification will result improved quality and increased life of the pavement . Nano - particles is one of the additives that are used to modify the properties of asphalt cement . Nano - clays are unique materials as additives to make significant improvements in the material properties of polymer Nano -composites. Nano-clay polymer materials typically strengthen the mechanical properties, modulus and stability of these cases. In this research, it is assumed that subgrade, sub-base and base layers of flexible pavement have sufficient resistance to rutting. Nanoclay is used to modification of bitumen properties for Hot Mix Asphalt mixtures better bearing capacity and resistance to rutting. So, limestone aggregate with 4 degration number, AC 60-70 and two types of montmorillonite Nanoclay: Cloisite 15A and Cloisite 30B are used in this study. Marshall and Dynamic creep tests in two stress levels ( 300 and 450 KPa ) at 50 ° C , as well as rutting test on the HMA samples with 0 , 2 , 4 and 6 percent of each Nanoclay were performed . Test results show that adding Nanoclay will result the better performance of HMA samples .

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In the present paper, to determine the pressure-dependent yield surface of polypropylene/nanoclay nanocomposites, the extended Drucker-Prager yield criterion is used and its parameters are derived by a combined experimental/numerical/optimization approach. In this method, the difference between the experimental and numerical results obtained from three-point bending test is minimized. In order to alleviate the burdensome numerical simulation, a surrogate model based on Kriging method is used to estimate the cost function. The optimum of this function is obtained by maximizing expected improvement method. Afterward, the results are verified by tension and compression tests. The results show that this method can substitute the complicated experimental tests which are normally employed to identify the extended Drucker-Prager parameters. Also, this method can be used to determine the mechanical properties of thermoplastic material such as tensile and compressive yield stresses and elastic modulus using only a three-point bending test. In addition, it is found that the volumetric change of thermoplastic during plastic deformation is significant and the non-associative, compared with the associative, plastic flow assumption is more proper for this material for the extended Drucker-Prager criterion.

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 In this study the caseinat sodium film containing nanoclay and Echinophora Platyloba essential oil was used in order to possibility of using biodegradable packaging as well as  its effect on the viability of probiotic bacteria to cover the contents of yogurt. The samples were stored at 4 and 15 ° C for 21 days. The effect of packing material on the survival of Lactobacillus acidophilus was not significant, while on the growth of Bifidobacterium was significant. The highest number of bacteria was observed in the coating containing 1.5 grams of nanoclay and the lowest number of containers containing 0.75 grams of nanoclay. By increasing storage temperature and time, simultaneously, the process of decreasing the number of live bacteria was accelerated .the reduction of Lactobacillus acidophilus bacteria at 15 ° C after three weeks of storage / 0 was a logarithmic cycle, while in the same situation, the number of Bifidobacterium analisis bacteria decreased by 1.3 times, indicating a higher resistance of Lactobacillus acidophilus to acidic conditions of yogurt during the storage time. At 4 ° C, there was no difference in mean pH and acidity between different packaging samples, but there was a significant difference between all packaging samples at 15 ° C. The highest decrease in pH and maximum acidity was due to the packing of 1.5 g of nanoclay in the end of the storage time

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Nowadays the use of natural and biodegradable nanofibers in the packaging industry due to the contamination of non-biodegradable polymers in food packaging is dramatically obvious and electrospinning is one of the easiest ways to produce these nanofibers. In this study, the electrospinning of collagen polymer type I (extracted from the rat-tail) with Beta Cyclodextrin and Nanoclay was investigated and Acetic acid was used as a safe solvent in terms of the environment. After designing the experiments using an experimental design software (Design Expert 7.0), the effects of independent variables such as weight-weight ratio of Beta Cyclodextrin to Collagen (X₁), Volume-weight ratio of Nanoclay to Collagen (X₂) and solution feed rate (X₃) was evaluated on dependent variable, including nanofibers diameter (Y₁). Also, electrospinning process was performed with a voltage of 12 Kv and the distance between the needle and the collector 120 mm at ambient temperature and pressure. Nanoclay have been used due to barrier and antimicrobial properties; in addition, Beta cyclodextrin was used for the specificity of the structure that causes hydrophilic and hydrophobic surfaces. Furthermore, to investigate the shape of nanofibers Scanning Electron Microscopy, to investigate the structure Transform Infrared Spectroscopy, to investigate existing elements X-Ray Fluorescence Spectroscopy and to determine thermal resistance Differential scanning calorimetry was applied. The results showed that optimal nanofiber with a average size of 123.01 nm and a flawless structure with a viscosity of 145.33 mpa.s was obtained.

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Soils contaminated with heavy metals are among the common environmental geotectonic problems all around the globe. Clay is considered as one of the best protective layers for environment to absorb polluters. Considerable SSA, very low permeability and the clays cationic capacity have been good factors to use these materials in geo-environmental projects vastly. It can react with the materials existing in the polluters because of the layered structure and special vast surface so the clay can absorb all or some of the dangerous polluter materials passing through the soil. Each part of the mineral materials constituting the clay, carbonate, organic materials, oxides, amorphous materials or remained phases can play a role in the process retention heavy metals. Carbonates play a special role in the process of the clay and metallic polluters’ interaction. The effect of the soil structure in retention heavy metal has been studied in many researches. In geotechnical environment view the clay mineral montmorillonite is one of the clays used in geo-environmental projects. Among the clay minerals montmorillonite has the highest property absorbing polluters. In the absence of clayey soils, compacted bentonite-enhanced sand mixtures are attracting greater attention as suitable material for contaminant barrier systems. The efficiency of these insulated barriers depends largely on their hydraulic and mechanical behavior. In landfills, as the main function of the liner is to minimize the movement of water out of the waste disposal facility, Landfill should satisfy three performance criteria if it is to perform satisfactorily as a barrier material. It should have low hydraulic conductivity (typically less than 1×10-9 m/s), should have sufficient strength in order to be stable during construction and operation, and it should not be susceptible to excessive shrinkage cracking due to water content changes that usually occur during the lifetime of the landfill. On the other hand, provision of the proper platform for landfills has been a concern of geotectonic and environmental geotectonic researchers in the past three decades. One of the objectives of this research was to introduce a material with suitable environmental geotectonic properties, minimum permeability, and maximum contaminant absorption potential. The process of producing nanoclay particles from bentonite clay with a top-down approach involves omission of some materials in the form of tailings. In related studies, the bentonite clay sample was divided into the following two main parts through physical and chemical processes: nano-montmorillonite (SLB) and process tailings (BLB). In this research, through a series of geotectonic and environmental geotectonic experiments the interaction of nano-montmorillonite interaction (SLB), process tailings (BLB), and bentonite clay samples with heavy metal contaminants was studied and analyzed experimentally. It shall be mentioned that the process of separating bentonite clay sample components was analyzed through microstructural X-ray diffraction (XRD) and specific surface area (SSA) experiments as well as scanning electron microscope (SEM) imaging. The tests conducted in the study were mostly on the basis of ASTM standard and the geo-environmental tests directions issued by McGill University of Canada. The soil carbonate percentage was defined by titration method. The specific surface area (SSA) was determined using the ethylene glycol-monoethyl ether (EGME) method. CEC was determined by the BaCl2 replacement method. The carbonate content of the soil was determined by titration, and the soil pH was measured in 1:10 soil solution.Also the soil pollution retention capacity was measured by titration test and HNO3 in different concentrations was added to the samples. Results of the present research suggest that process tailings (BLB) contain approximately 80% of copper as a heavy metal contaminant at a concentration of 100 cmol/kg-soil. In addition, permeability of the BLB sample and its inflation are approximately 5.2 10-10 m/sec and 70%, respectively.

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In this paper, the effect of different environmental conditions on the impact properties of fiber metal laminates hybridized with nanoclay is studied. For this purpose, the fiber metal laminates were first laminated by aluminum alloy sheets, glass fiber, pure epoxy resin and modified resin with nanoclay using hand lay-up process. The influence of different types of environmental conditions including cryogenic aging (at temperature of –196 °C in LN2), high-temperature aging (at temperature of 130 °C in dry air), and hygrothermal aging (at temperature of 90 °C in distilled water) on the impact properties of the specimens made with pure epoxy resin and modified resin was investigated using response surface method in various levels. A suitable model was developed to predict the effect of aging type and nanoparticle content on the impact strength of specimens. The results obtained suggest that the cryogenic aging has a most effective role reduction of the impact properties of the specimens. While htgrothermal aging has a less effective role in decreasing the impact properties of fiber metal laminates. Additionally, the result of main effects analysis showed that the detrimental role of different types of aging in reducing the impact properties is more effective than the positive role of nanoparticles in improving the impact properties of fiber metal laminates.

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Formation of nanocomposites in biopolymer coats can provide a new opportunity not only to improve the properties but also to reduce the price of these products. Also, nanocomposites, increase the efficiency of natural antibacterial materials. In order to investigate the antioxidant and antimicrobial effects of lemon grass extract and the amount of nanoclay on the efficacy of alginate-nanoclay composite coating of chicken fillet refrigerated storage, an experiment was performed in a completely randomized design with 6 treatments including alginate (2%) – nanoclay (1.5 and 3%) nanocomposite coating, without and with levels of 1.5 and 3% alcoholic extract of lemon grass and 3 replicates each treatment during 9 days. Results showed that contribution of nanoclay in the structure of nanocomposite coating was affected on its performance. Enrichment of alginate-nanoclay nanocomposite coating with lemon grass extract, added to its efficiency. Applying 3% of lemon grass extract in nanocomposite coatings, especially when using 3% nanoclay, significantly (p<0.05) reduced the number of psychrophilic bacteria, tiobarbitoric acid index, free fatty acids and total volatile nitrogen compounds and increased chicken fillets water holding capacity during refrigerated storage. The contribution of nanoclay in without extract nanocomposite coating, did not significantly affect the number of psychrophilic bacteria at the end of the storage period. In general, the efficacy of alginate-nanoclay nanocomposite coating in increasing the shelf life of chicken fillets in refrigerated conditions depends on the appropriate contribution of nanoclay and enrichment with the appropriate concentration of lemon grass extract.

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Chitosan based films have several disadvantages, such as poor mechanical properties and low moisture deterioration, which limits their use in food packaging. In this study, nanomaterials such as nanoclay (M) and nanosilver (Ag) were used to improve the properties of the film whilst applying electrical current during film drying. Nanocomposite films based on chitosan, were prepared by adding four levels 0, 1, 3 and 5% silver and clay, then heat and electricity with 0, 15, 30 and 60 Voltage were simultaneously applied to dry them, finally their characteristics like including WVP, O₂P, physical and mechanical properties, and microstructure were studied. The presence of nanoparticles in nanocomposite films increased the moisture, thickness, opacity, WVP, O₂P and improved mechanical properties, incomparison with pure chitosan film. On the other hand, the concentration of 3% in both treatments improve the permeability and mechanical properties of the 1 and 5% levels. The application of electrical current had no significant effect on moisture content, solubility and thickness. In contrast, the use of electric current with a voltage of 30, improved mechanical properties, turbidity and WVP and a voltage of 60, improved O₂P in nanocomposites. The images produced by the SEM show that the pure chitosan film has a rough surface and multiple gaps and the film surface of the nanoclay is relatively smooth and compact, which allows for increased tensile strength and inhibitory properties. The film containing nanosilver also had a more turbulent structure with a gap, turbidity and mechanical properties, and less inhibitory properties than nanoclay.

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In this paper, experimental investigation and regression analysis on plastic deformation of polyurethane composite sandwich panels reinforced with nanoclay under blast loading is investigated. For this purpose, polyurethane sandwich panels with different percentages of nanoclay and in different densities were prepared. The mechanical properties of nanoclay-reinforced foams were studied by tensile-compression test. Explosive shock tube device and C4 explosive material were used for explosive loading. Then, in order to investigate the effect of significant parameters such as the percentage of nanoclay and density of polyurethane foam on the displacement of composite sandwich panels and optimizing them for minimum deformation, the response surface methodology was used. The results obtained from the regression model at 95% confidence level indicate a very good agreement between the experimental results and the values ​​predicted by the model. The high value of the correlation coefficient between the studied parameters and the amount of plastic deformation of the sandwich panel (R² = 99%) indicate that the proposed model has a higher accuracy. Finally, the optimal conditions for achieving the minimum displacement of composite sandwich panels were determined as 1.57% nanoclay content and foam density of 130 kg/m³.