基于改性剪切增稠胶/芳纶复合材料的低速冲击性能的研究  

Study on low-speed impact properties of modified shear-thickening gel/aramid fiber composites

作　　者：文浩李洁 陈志远 俞科静[1] Wen Haolijie;Chen Zhiyuan;Yu Kejing(Key Laboratory of Eco-Textiles,Ministry of Education,Jiangnan University,Wuxi 214122)

机构地区：[1]江南大学生态纺织教育部重点实验室,无锡214122

出　　处：《化工新型材料》2024年第8期100-105,110,共7页New Chemical Materials

基　　金：镇江市重点研发计划(GY2021009);连云港市重大技术攻关-揭榜挂帅项目(CGJBGS2104)。

摘　　要：为了改善传统剪切增稠胶存在的缺陷,从分子结构设计和共混改性两方面出发,通过在分子链上引入苯环结构并共混交联乙烯-醋酸乙烯共聚物(EVA),有效地改善了冷流效应,并利用芳纶织物作为增强材料,热压制备得到新型轻量化抗冲击复合材料。结果表明:复合弹性体内大量动态可逆键和硫化形成的共交联网络,是新型轻量化抗冲击复合材料具有良好抗冲击防护效果的主要原因。PEVA-Kevlar-4复合材料在面对不同冲击能量时(13.4J和26J),能量吸收率分别可达86.6%和90.1%。此外,该复合材料在低速抗冲击防护材料领域,有广泛的应用前景。In order to improve the defects of traditional shear thickening gel,the cold flow effect was effectively improved by introducing benzene ring structure into molecular chain and blending and crosslinking ethylene-vinyl acetate copolymer(EVA)from two aspects of molecular structure design and blending modification.By using aramid fabric as reinforcing material,a new lightweight impact resistant composite was prepared by hot pressing.The results showed that the co-crosslinking network formed by a large number of dynamic reversible bonds and vulcanization in the composite elastic body was the main reason for the good impact protection effect of the new lightweight impact resistant composite.When PEVA-Kevlar-4 composites faced different impact energies(13.4J and 26J),the energy absorption rates could reach 86.6%and 90.1%,respectively,indicating that the composite material had a wide application prospect in the field of low-speed impact protection materials.

关 键 词：剪切增稠胶 分子结构设计 共混改性 动态可逆 抗低速冲击 

分 类 号：TB332[一般工业技术—材料科学与工程]