مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

چاپ سه‌بعدی آمیزه‌های هوشمند PETG با تحریک گرمایی

نوع مقاله : پژوهشی اصیل

نویسندگان
1 دانشگاه تهران
2 پژوهشگاه پلیمر و پتروشیمی ایران، تهران
چکیده
مواد هوشمند می‌توانند مانند موجودات زنده نسبت به تغییرات محیط واکنش نشان دهند و خود را با شرایط و تغییرات محیطی مانند تغییرات دما، جریان الکتریکی، میدان مغناطیس، نور، رطوب و غیره انطباق دهند. استفاده از چاپ سه‌بعدی برای پردازش مواد هوشمند، رویکرد جدیدی است که به عنوان چاپ چهاربعدی شناخته می‌شود. در این پژوهش، فرآوری، ساخت و چاپ سه‌بعدی آمیزه‌های حافظه‌شکلی PETG-ABS در سه درصد وزنی 30/70،50/50 و70/30 انجام شد. نتایج حاصل از تصویربرداری با میکروسکوپ الکترونی روبشی نیز سازگاری این دو پلیمر را تایید کرد. در تمامی آمیزه‌های PETG-ABS ترکیبی از مورفولوژی دریا-جزیره و قطره-ماتریس مشاهده شد و برای ترکیبات 30/70 و 70/30 قطرات فاز پراکنده در ماتریس به طور واضح ملاحضه گردید. نتایج خواص مکانیکی نیز نشان داد هرچه درصد ABS در آمیزه زیاد شود، استحکام کششی بالاتر می­رود و ازدیادطول کاهش می­یابد. نتایج به دست‌آمده از آزمون حافظه‌شکلی نشان‌دهنده‌ی وجود قابلیت برنامه‌ریزی خاصیت حافظه‌شکلی در آمیزه‌های چاپ چهاربعدی‌شده می‌باشد. همان­طور که انتظار می­رود افزایش درصد وزنی ABS با اختلال در بازیابی آمیزه­ها همراه بود لذا آمیزه دارای 70 درصد وزنی PETG و 30 درصد وزنی ABS، مطلوب‌ترین خواص حافظه‌شکلی را از خود نشان دادند.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

3D Printing of Smart PETG Blends with Thermal Stimulation

نویسندگان English

Kiandokht Mirasadi 1
Davoud Rahmatabadi 1
Esmaeil Ghasemi 2
Majid Baniassadi 1
Mostafa Baghani 1
چکیده English

Smart materials can react to environmental changes like living organisms and adapt themselves to environmental conditions and changes such as changes in temperature, electric current, magnetic field, light, humidity, etc. Using 3D printing to process smart materials is a new approach known as 4D printing. In this research, processing, manufacturing and 3D printing of PETG-ABS in three weight percentages of 70/30, 50/50 and 30/70 were done. The results of SEM also confirmed the compatibility of these two polymers. In all PETG-ABS mixtures, a combination of sea-island and drop-matrix morphology was observed, and for the 30/70 and 30/70 blends, phase droplets dispersed in the matrix were clearly observed. The results of mechanical properties also showed that as the percentage of ABS in the mixture increases, the tensile strength increases and the elongation decreases. The results obtained from the shape memory test indicate the existence of the ability to program the shape memory property in 4D printing mixtures. As expected, the increase in the weight percentage of ABS was associated with the disorder in the recovery of the mixtures, so the mixture with 70% by weight of PETG and 30% by weight of ABS showed the most favorable shape memory properties.

کلیدواژه‌ها English

3D printing
Shape Memory Polymers
Mechanical Properties and SEM
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