Epoxy resin is widely used to make composites, electronic and electric parts, adhesives, and coating materials because it has excellent thermal, electrical, and mechanical properties. Using natural materials in making epoxy composites and nanocomposites would make the final products greener. Therefore, in this study, epoxidized soybean oil (ESO) and cellulose nanocrystals (CNCs) were used to make green epoxy nanocomposites. ESO was prepared by epoxidation of soybean oil with peroxyacetic acid and it was confirmed by Fourier transform infrared spectroscopy. The ESO was mixed with diglycidyl ether of bisphenol A at different weight ratios (10%–50%) and the stoichiometric amount of ethylene diamine was used for curing. CNC content in the nanocomposites was changed from 0.125 to 1 phr. Mechanical properties of the epoxy samples and the nanocomposites were investigated by universal testing machine and izod impact tester. The epoxy sample showed best mechanical properties at ESO 30%. The nanocomposite with CNC 0.25 phr showed best mechanical properties. Fracture surfaces of the epoxy sample and the nanocomposites were investigated by scanning electronic microscope. POLYM. ENG. SCI., 60:439–445, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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纤维素纳米晶体绿色环氧纳米复合材料的制备及力学性能

环氧树脂具有优异的热，电和机械性能，因此被广泛用于制造复合材料，电子和电气部件，粘合剂和涂料。使用天然材料制造环氧复合材料和纳米复合材料将使最终产品更环保。因此，在这项研究中，使用环氧化大豆油（ESO）和纤维素纳米晶体（CNC）制备绿色环氧纳米复合材料。ESO是通过用过氧乙酸将大豆油环氧化而制得的，并通过傅里叶变换红外光谱法得到了证实。将ESO与双酚A的二缩水甘油醚以不同的重量比（10％–50％）混合，并使用化学计量的乙二胺进行固化。纳米复合材料中的CNC含量从0.125更改为1 phr。用万能试验机和伊佐德冲击试验机研究了环氧样品和纳米复合材料的力学性能。环氧样品在ESO 30％时表现出最佳的机械性能。CNC 0.25 phr的纳米复合材料显示出最佳的机械性能。通过扫描电子显微镜研究环氧样品和纳米复合材料的断裂表面。POLYM。ENG。SCI。，60：439–445，2020.©2019塑料工程师协会