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首页> 外文期刊>Journal of Applied Polymer Science >Interface engineering for the improvement of mechanical and thermal properties of covalent functionalized graphene/epoxy composites
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Interface engineering for the improvement of mechanical and thermal properties of covalent functionalized graphene/epoxy composites

机译：用于改善共价官能化石墨烯/环氧复合材料的机械和热性能的界面工程

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摘要

Functionalized reduced graphene oxide (GO)/epoxy composites are fabricated through solution mixing. GO is functionalized using 3-amino-1,2,4-triazole (TZ) in presence of potassium hydroxide (KOH). KOH is expected to serve dual role as catalyst for nucleophilic addition reaction between GO and TZ, and also as reducing agent. The grafting of TZ moiety on GO is confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis. The prepared composites show remarkable improvement in mechanical and thermal stability. The fracture toughness of the composites (critical stress intensity factor, K-IC) achieved from single edge notched bending testing is improved by approximate to 111% against pure epoxy at 0.1 wt % loading of TZ functionalized GO. Further, the tensile strength and Young's modulus are improved by approximate to 30.5% and 35%, respectively. Thermal stability of the composites as investigated by thermogravimetric analysis showed 29 degrees C rise in onset degradation temperature for 0.1 wt % TZ functionalized GO incorporated composite. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46124.
机译：官能化的还原的石墨烯氧化物（GO）/环氧复合材料通过溶液混合制造。在存在氢氧化钾（KOH）的情况下使用3氨基-1,2,4-三唑（TZ）进行官能化。 KOH预计将在GO和TZ之间的亲核加成反应的催化剂提供双重作用，也是还原剂。通过傅里叶变换红外光谱，X射线衍射和热重分析确认了TZ部分的接枝。制备的复合材料表现出卓越的机械和热稳定性。通过在0.1wt％RZ官能化GO的0.1wt％加载的纯环氧树脂上，改善了从单边缘切口弯曲测试所达到的复合材料的断裂韧性（临界应力强度因子，K-IC）。此外，通过分别近似为30.5％和35％，提高拉伸强度和杨氏模量。通过热重分析研究的复合材料的热稳定性显示出生起来的降解温度的29摄氏度上升0.1wt％TZ官能化的复合材料。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46124。

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