Study on improving the toughness of rapidly curing epoxy resin composite materials with a biobased microcrystalline cellulose
参考中译:生物基超细纤维素提高快速固化环氧树脂复合材料韧性的研究


          

刊名：Polymers for Advanced Technologies
作者：Xiaoke Bi（Key Laboratory of Bio-Based Material Science and Technology, Northeast Forestry University, Ministry of Education）
Guoying Liu（Key Laboratory of Bio-Based Material Science and Technology, Northeast Forestry University, Ministry of Education）
Lijun Cao（Key Laboratory of Bio-Based Material Science and Technology, Northeast Forestry University, Ministry of Education）
Ce Sun（Key Laboratory of Bio-Based Material Science and Technology, Northeast Forestry University, Ministry of Education）
Haiyan Tana（Engineering Research Center of Advanced Wooden Materials, Ministry of Education）
Yanhua Zhang（Key Laboratory of Bio-Based Material Science and Technology, Northeast Forestry University, Ministry of Education）
刊号：545C0065/I
ISSN：1042-7147
出版年：2024
年卷期：2024, vol.35, no.3
页码：e6361-1--e6361-8
总页数：8
分类号：O63
关键词：Epoxy resin；Mechanical property；Microcrystalline cellulose；Rapid curing
参考中译：环氧树脂;机械性能;微结晶纤维素;快速固化
语种：eng
文摘：Rapid solidification molding is one of the main low-cost forming methods for composite materials, and the reasonable selection of the solidification molding process is the key to achieving material performance. The curing system used in this paper is the widely used, inexpensive, and readily available epoxy resin (WSR618) and the transparent, colorless, and less toxic 593 curing agent, which cures at room temperature. Through the study of various temperature formulations, a rapid curing system was determined that has a 10-min cure at 80℃. The results showed that when the mass ratio of epoxy (EP) resin to curing agent was 5:1, the curing system was selected at 80℃ for 10 min, and the bending strength could reach 100.19 MPa, and the impact strength could reach 12.82 kJ/m~2. However, the difficulty caused by quick solidification was a reduction in mechanical characteristics, which required modification. Microcrystalline cellulose is cheap and readily available and widely available, so microcrystalline cellulose (MCC) was chosen for modification in this study. The experimental results showed that the addition of MCC reduced the fracture brittleness of EP composite materials. When 0.75% MCC was added, the bending and tensile strengths reached 116.88 and 52.53 MPa, respectively, which were 16.66% and 18.74% higher than unmodified EP. The elongation at break reached 11.57%, which is 14.13% higher than unmodified.
参考中译：快速凝固成型是复合材料低成本成型的主要方法之一，合理选择凝固成型工艺是实现材料性能的关键。本文所使用的固化体系是应用广泛、价格低廉、易于获得的环氧树脂(WSR618)和透明、无色、无毒的593固化剂，可在室温下固化。通过对不同温度配方的研究，确定了快速固化体系，固化时间为10分钟，固化温度为80℃。结果表明，当环氧树脂与固化剂的质量比为5：1，固化体系为80℃，固化时间为10min时，其弯曲强度可达100.19 Mpa，冲击强度可达12.82kJ/m2，但快速固化带来的困难是力学性能下降，需要进行改性。由于微晶纤维素价格低廉，易于获得，应用广泛，因此本研究选择微晶纤维素(MCC)进行改性。实验结果表明，MCC的加入降低了EP复合材料的断裂脆性。当MCC含量为0.75%时，复合材料的弯曲强度和拉伸强度分别达到116.88和52.53 Mpa，比未改性的EP分别提高16.66%和18.74%。断裂伸长率达到11.57%，比未改性前提高14.13%。



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