改性甲基二苯乙炔基硅烷复合材料耐湿热性能

doi:10.19936/j.cnki.2096-8000.20230528.003

复合材料科学与工程 ›› 2023, Vol. 0 ›› Issue (5): 19-24.DOI: 10.19936/j.cnki.2096-8000.20230528.003

改性甲基二苯乙炔基硅烷复合材料耐湿热性能

白小陶, 贾宇翔, 胡文杰, 张晓晖, 蒋峰光, 刘敏, 周权^*

华东理工大学材料科学与工程学院特种功能高分子材料及相关技术教育部重点实验室,上海 200237

收稿日期:2022-03-07 出版日期:2023-05-28 发布日期:2023-08-22
通讯作者: 周权(1973—),男,博士,主要从事高性能树脂及其复合材料方面的研究,qzhou@ecust.edu.cn。
作者简介:白小陶(2000—),男,学士,主要从事耐高温树脂基复合材料方面的研究。
基金资助:
中央高校基本科研业务费专项资金(50321042017001);国家自然科学基金(52173074)

Hygrothermal resistance of modified methyl diphenylacetylene silane composites

BAI Xiaotao, JIA Yuxiang, HU Wenjie, ZHANG Xiaohui, JIANG Fengguang, LIU Min, ZHOU Quan*

Key Laboratory for Special Polymer Materials and Related Technology, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2022-03-07 Online:2023-05-28 Published:2023-08-22

摘要/Abstract

摘要： 采用改性双马来酰亚胺(GBMI)共混改性甲基二苯乙炔基硅烷(MDPES)树脂,并以此为树脂基体制备了GF/MDPES-GBMI复合材料。通过吸水、脱水实验及理论计算,研究GF/MDPES-GBMI复合材料吸湿、脱水行为和湿热老化对复合材料界面的影响。结果表明,随着MDPES-GBMI树脂中GBMI含量的增加,复合材料的扩散系数由0.019 3 mm²/s下降为0.014 7 mm²/s,渗透系数大幅度降低,由9.94×10^-4 mm²/s下降为1.84×10^-4 mm²/s,同时平衡吸水率和平衡脱水率也有所降低。虽然复合材料的弯曲强度在湿热老化后有所下降,但干燥后性能即可恢复。水分子以准自由态形式存在于GF/MDPES-GBMI复合材料的孔隙中,吸水和脱水规律遵循Fick第二定律。

关键词: 双马来酰亚胺, 硅炔杂化树脂, 复合材料, 湿热老化, 菲克定律

Abstract: GF/MDPES-GBMI composites were prepared using modified bismaleimide (GBMI) blended with methyl diphenylacetylene silane (MDPES) resin. The effects of water absorption, dehydration behavior and hygrothermal aging on the interface of GF/MDPES-GBMI composites were studied through water absorption/loss experiments and theoretical calculation. The results show that with the increase of GBMI content in MDPES-GBMI resin, the diffusion coefficient of the composite decreases from 0.019 3 mm²/s to 0.014 7 mm²/s, and the permeability coefficient decreases greatly from 9.94×10^-4 mm²/s to 1.84×10^-4 mm²/s. At the same time, the equilibrium water absorption rate and the equilibrium water loss rate also decreases. Although the flexural strength of the composite decreases after hygrothermal aging, this property recovers after dehydration. Water molecules exist in a quasi-free form in the pores of GF/MDPES-GBMI composites, and the law of water absorption and dehydration follows Fick’s second law.

Key words: bismaleimide, silicylene hybrid resin, composite materials, hygrothermal aging, Fick’s law

中图分类号:

TB332

白小陶, 贾宇翔, 胡文杰, 张晓晖, 蒋峰光, 刘敏, 周权. 改性甲基二苯乙炔基硅烷复合材料耐湿热性能[J]. 复合材料科学与工程, 2023, 0(5): 19-24.

BAI Xiaotao, JIA Yuxiang, HU Wenjie, ZHANG Xiaohui, JIANG Fengguang, LIU Min, ZHOU Quan*. Hygrothermal resistance of modified methyl diphenylacetylene silane composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(5): 19-24.

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改性甲基二苯乙炔基硅烷复合材料耐湿热性能

Hygrothermal resistance of modified methyl diphenylacetylene silane composites

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