通过对多种增韧剂进行筛选,制备了一种高韧性环氧树脂及其碳纤维复合材料。研究了不同增韧剂的增韧效果以及核壳粒子增韧剂对树脂冲击韧性、固化行为、工艺性及复合材料层压板力学性能的影响,并采用扫描电子显微镜对树脂浇注体及碳纤维复合材料层压板的冲击断面进行了形貌分析。结果表明:核壳粒子增韧剂增韧效果较好,当核壳粒子质量分数为12%时,树脂浇注体冲击强度达到了64.90kJ/m2,与未增韧树脂相比提高了39.27%,碳纤维复合材料层压板冲击强度达到了134.21kJ/m2,比增韧前提高了43.7%,而且不影响树脂的固化反应;制备的高韧性环氧树脂工艺性较好,工艺窗口期长,有利于预浸料的制备。
This article prepared a high-toughness epoxy resin and its carbon fiber composites by screening a variety of toughening agents.The toughening effects of different toughening agents and the influence of core-shell particle toughening agents on the impact toughness,curing behavior,processability,and mechanical properties of composite laminates were investigated.The morphology of the impact sections of the resin castings and the carbon fiber composite laminates was analyzed by scanning electron microscopy.The results showed that the toughening effect of the core-shell particles toughening agent was better.When the mass fraction of core-shell particles was 12%,the impact strength of the resin casting reached 64.90kJ/m2,which was 39.27% higher than that of the untoughened resin.The impact strength of the carbon fiber composite laminate reached 134.21kJ/m2,which was 43.7% higher than that before toughening,and it did not affect the curing reaction of the resin.The prepared high-toughness epoxy resin had good processability and a long process window,which was conducive to the preparation of prepregs.
[1] 苏建锋,李会录,夏婷,等.环氧树脂增韧改性研究进展[J].热固性树脂,2023,38(5):61-70.
[2] 刘文静,杨国荣,赵晓曼.碳纤维复合材料研究进展及其应用[J].纺织科技进展,2023(7):1-4.
[3] Han Y C,Zhao H,Chen J C,et al.A new phosphorus flame-retard curing agent for epoxy resin/anhydride system[J].Po-lymers for Advanced Technologies,2022,33(3):927-936.
[4] Miao Z W,Yan D P,Wang X D,et al.New flame retardant epoxy resins based on cyclophosphazene-derived curing agents[J].Chinese Chemical Letters,2022,33(8):4026-4032.
[5] 魏波,周金堂,姚正军,等.环氧树脂基体的原位增韧技术研究进展[J].材料导报,2019,33(17):13-17.
[6] 圣冬冬,宋振亚,王茜茜,等.热塑性树脂增韧环氧树脂及其在航空航天中的应用[J].化工新型材料,2023,51(S1):12-15.
[7] 祁一信,李玲.高韧性及快速固化环氧树脂体系的研究进展[J].热固性树脂,2023,38(6):48-56.
[8] 鹿海军,李亚锋,张杜鹃,等.环氧树脂增韧改性技术及其在航空先进复合材料中的应用[J].复合材料科学与工程,2023(8):121-128.
[9] Chai H,Wang X H,Yang X Y,et al.Effect of new nonionic curing agent on curing kinetics and mechanical properties of epoxy resin[J].Polymers for Advanced Technologies,2022,33(1):380-391.
[10] 钭李昕,王秋成,陈光耀.碳纤维复合材料低速冲击特性及损伤分析研究[J].机电工程,2016,33(7):815-821.
[11] 曹军生,伍思豫,向豪,等.橡胶增韧环氧树脂的研究进展[J].特种橡胶制品,2023,44(1):58-62.
[12] 姚兴芳,范时军,张世锋.丁腈橡胶增韧环氧树脂研究进展[J].热固性树脂,2009,24(3):52-55.
[13] 胡少坤,陈继明,孟凡宁,等.羧基丁腈橡胶增韧改性环氧树脂复合材料的性能研究[J].特种橡胶制品,2022,43(1):26-28.
[14] 孙兴祥,叶国方,童方强,等.液体橡胶增韧改性中温固化环氧树脂研究及其碳纤维复合材料制备[J].高科技纤维与应用,2023,48(4):51-59.
[15] 李璇蕊,郑婷,王晓东,等.热塑性树脂增韧环氧树脂复合材料研究进展[J].哈尔滨工程大学学报,2024,45(4):808-818.
[16] Zheng T,Xi H,Wang Z,et al.The curing kinetics and mechanical properties of epoxy resin composites reinforced by PEEK microparticles[J].Polymer Testing,2020,91:106781.
[17] 朱刚建,李文晓.核壳颗粒增韧改性环氧树脂基体研究评述[J].材料导报,2024,38(10):273-281.
[18] Xu C,Qu T,Zhang X,et al.Enhanced toughness and thermal conductivity for epoxy resin with a core-shell structured polyacrylic modifier and modified boron nitride[J].RSC Advances,2019,9(15):8654-8663.
[19] Chen J,Kinloch A J,Sprenger S,et al.The mechanical properties and toughening mechanisms of an epoxy polymer modified with polysiloxane-based core-shell particles[J].Polymer,2013,54(16):4276-4289.
[20] 宁娜.纳米核壳粒子的设计制备及其对环氧树脂与碳纤维复合材料增韧机理和性能的研究[D].上海:东华大学,2022.
[21] Luo H T,Ding J,Huang Z X,et al.Investigation of properties of nano-silica modified epoxy resin films and composites using RFI technology[J].Composites Part B-Engineering,2018,155:288-298.
[22] 高朋召,林明清,林海军,等.纳米二氧化硅改性环氧树脂复合材料的性能研究[J].湖南大学学报(自然科学版),2015,42(6):1-6.
[23] 朱德智.增强增韧的环氧树脂/二氧化硅纳米复合材料的制备与研究[J].塑料工业,2017,45(6):66-69.
[24] 袁智慧,牛永平,汪小伟,等.环氧树脂增韧设计研究进展[J].化工新型材料,2020,48(9):16-19;23.
[25] 李志涛,尹国强,王怡敏,等.满足轻量化自行车应用的T700级湿喷湿纺碳纤维预浸料性能研究[J].高科技纤维与应用,2022,47(3):62-71.
[26] Gao J,Li J,Benicewicz B C,et al.The mechanical properties of epoxy composites filled with rubbery copolymer grafted SiO2[J].Polymers,2012,4(1):187-210.
[27] Bagheri R,Pearson R A.Role of particle cavitation in rubber-toughened epoxies:Ⅱ.Inter-particle distance[J].Polymer,2000,41(1):269-276.
PDF
