连续玄武岩纤维/环氧树脂复合材料的润湿渗透剂表面改性及其非线性蠕变性能
Study on the surface modification of wetting penetrant and nonlinear creep of continuous basalt fiber/epoxy resin composites
张颜锋 1朱四荣 1别依诺 1陆士平 2贺攀3
作者信息
- 1. 武汉理工大学 新材料力学理论与应用湖北省重点实验室,武汉 430070
- 2. 上海富晨化工有限公司,GB51160 国家标准管理组,上海 200241
- 3. 成都纺织高等专科学校,成都 611731
- 折叠
摘要
采用润湿渗透剂协同硅烷偶联剂对玄武岩纤维(BF)进行表面改性,并缠绕成型制备了玄武岩纤维/环氧树脂(BF/EP)复合材料.采用万能材料试验机测定了BF/EP的弯曲性能及在不同应力水平下测定了BF/EP复合材料 240 min的蠕变性能,借助场发射扫描电子显微镜(FESEM)观察了纤维及弯曲断裂断口的表面形貌,并分析了纤维表面改性对各项力学性能的影响.结果表明:采用润湿渗透剂协同硅烷偶联剂对BF进行表面改性后,BF/EP弯曲性能得到有效改善,层间剪切强度得到提高,FESEM形貌显示BF的协同改性提高了纤维与树脂之间的界面性能;在多种应力水平下的短期蠕变实验中,均表现出蠕变柔量增量的显著降低.使用改进Findley模型可描述BF/EP复合材料在低于其断裂应力水平下的蠕变性能,以此可进行其在不同应力水平下的蠕变性能预测.
Abstract
The surface modification of basalt fiber(BF)was carried out by using a wetting and penetrating agent in conjunction with a silane coupling agent,followed by winding and molding to prepare basalt fiber/epoxy resin(BF/EP)composite materials.The bending performance of BF/EP was determined using a universal material test-ing machine,and the creep properties of BF/EP composite materials were measured at different stress levels for 240 min.The surface morphology of the fiber and the bending fracture surface were observed by field emission scanning electron microscopy(FESEM),and the effect of fiber surface modification on various mechanical proper-ties was analyzed.The results show that the surface modification of BF using a wetting and penetrating agent in combination with a silane coupling agent is an effective approach to enhance the bending performance and inter-laminar shear strength of BF/EP composites.The FESEM morphology analysis reveals that this synergistic modifica-tion of BF enhances the interfacial properties between the fiber and the resin,which contributes to the improved mechanical properties of the composite material.Moreover,the short-term creep experiments conducted at various stress levels indicate a significant reduction in creep compliance increment,which suggests that the modi-fied BF/EP composite material has better creep resistance.The improved Findley model provides a useful tool to predict the creep properties of BF/EP composites at different stress levels,which can help optimize their design and performance in practical applications.
关键词
表面改性/润湿渗透剂/BF/EP复合材料/非线性蠕变/改进Findley模型Key words
surface modification/wetting penetrant/basalt fiber/epoxy resin composite material/nonlinear creep/improving the Findley model引用本文复制引用
出版年
2024
NETL
NSTL
万方数据