Wu Hao, Liu Chengbao, Cheng Li, Yu Yue, Zhao Haichao, Wang Liping
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
Nano Science and Technology Institute, University of Science and Technology of China Suzhou 215123 China.
RSC Adv. 2020 Nov 4;10(66):40148-40156. doi: 10.1039/d0ra07751h. eCollection 2020 Nov 2.
The high rigidity and brittleness of traditional thermosetting resin based on bisphenol epoxy limits its many potential technical applications. Here, a novel tertiary amine containing cardanol-based epoxy resin (NC-514-DEA) was synthesized by reaction of diethanolamine (DEA) with cardanol epoxy resin (NC-514). Moreover, NC-514-DEA modified graphene oxide (GOND) was prepared and used as a reactive nano-reinforcing filler for epoxy composites. The results show that, compared with neat epoxy resin, the fracture toughness of the epoxy composite with 0.5 wt% GOND is increased by nearly 10%, and the friction coefficient is reduced from 0.567 to 0.408, demonstrating the best performance among specimens. The improved mechanical and wear resistance properties of prepared composites were attribute to the synergistic effect of NC-514-DEA and GO, which inhibited the generation and propagation of cracks by enhancing the interfacial interaction and distributing stress. In addition, the synthetic process of GOND is green, simple and efficient, providing a novel way for designing epoxy composite materials with many potential applications.
基于双酚环氧树脂的传统热固性树脂的高刚性和脆性限制了其许多潜在的技术应用。在此，通过二乙醇胺（DEA）与腰果酚环氧树脂（NC-514）反应合成了一种新型含叔胺的腰果酚基环氧树脂（NC-514-DEA）。此外，制备了NC-514-DEA改性氧化石墨烯（GOND），并将其用作环氧复合材料的反应性纳米增强填料。结果表明，与纯环氧树脂相比，含0.5 wt% GOND的环氧复合材料的断裂韧性提高了近10%，摩擦系数从0.567降至0.408，在试样中表现出最佳性能。所制备复合材料的力学性能和耐磨性的改善归因于NC-514-DEA和氧化石墨烯的协同作用，通过增强界面相互作用和应力分布抑制了裂纹的产生和扩展。此外，GOND的合成过程绿色、简单且高效，为设计具有许多潜在应用的环氧复合材料提供了一种新方法。
