玻璃纤维/尼龙6复合材料吸湿特性及其界面性能  

Moisture Absorption Characteristics and Interface Properties of Glass Fiber/Nylon 6 Composite

作　　者：黄增斌 罗伟权 丛杰 薛珂 吕冬 HAUNG Zengbin;LUO Weiquan;CONG Jie;XUE Ke;L Dong(Guangzhou HKUST Fok Ying Tung Research Institute,Guangzhou 511458,China;School of System Design and Intelligent Mamufacturing,Southern University of Science and Technology,Shenzhen 518055,China;Smart Manufacturing,SYSTEMS HUB,The Hong Kong University of Science and Technology(GZ),Guangzhou 511458,China)

机构地区：[1]广州市香港科大霍英东研究院,广东广州511458 [2]南方科技大学系统设计与智能制造学院,广东深圳518055 [3]香港科技大学(广州)系统枢纽/智能制造学域,广东广州511458

出　　处：《塑料工业》2022年第10期106-112,共7页China Plastics Industry

基　　金：中国石油化工股份有限公司项目(合同号219041);广州市科技计划科学研究专项(201904010279);广东省重点领域研发计划(2020B010179002)。

摘　　要：由于分子链含有大量酰胺基团,尼龙6(PA6)材料具有很强吸水性,在存储、运输及使用过程中容易受到湿度等环境因素影响,导致其与玻璃纤维(GF)的界面强度产生衰减。为了研究GF/PA6复合材料在长期潮湿存储、服役环境下界面剪切强度衰减规律,采用熔融浸渍与机械研磨工艺制备了单向GF/PA6复合材料薄膜试样,并对其吸湿特性进行测试。基于纳米压痕技术进行纤维推出实验,成功获得了纤维推出过程的载荷-位移曲线,并定量分析了湿气对复合材料界面力学性能的影响。结果表明,湿气对复合材料界面剪切强度影响较大,与干态相比,稳态和湿态时界面剪切强度分别降低了约20%和60%。本研究为GF/PA6复合材料在长期潮湿储存及服役环境下强度预测、失效分析及材料的设计优化提供了关键力学性能数据支撑。Since large number of amide groups in molecular chains,nylon 6(PA6)material had strong water absorption characteristics and were easily affected by environmental factors,such as,humidity during storage,transportation and applications.It often caused the decline of the interfacial properties of the glass fiber(GF)and PA6.In order to study the interfacial shear strength of GF/PA6 composites under long-term humid storage and service environment,melt dipping and mechanical grinding process were used to prepare unidirectional GF/PA6 composite samples,and test their moisture absorption characteristics.Based on the nanoindentation technology,GFs were pushed out from the composite,and the load-displacement curve was successfully obtained.The influence of moisture on the interfacial mechanical properties of composites was quantitatively analyzed.The results show that moisture has a greater influence on the interfacial shear strength of the composite material.Comparing with the dry state,the interfacial shear strength in steady and wet state will be reduced by about 20% and 60%.This study provides an experimental basis for the strength prediction,failure analysis and optimization design of GF/PA6 composites under long-term humid storage and service environments.

关 键 词：玻璃纤维/尼龙6 吸湿特性 纤维推出 界面剪切强度 纳米压痕 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]