材料工程2024，Vol.52Issue(4)：155-163,9.DOI:10.11868/j.issn.1001-4381.2022.000015
聚氨酯上浆剂处理PBO纤维复合材料的界面性能
Interface properties of composites from PBO fibers modified by polyurethane sizing agent
摘要
Abstract
To improve the interfacial properties of poly-p-phenylenebenzobisoxazole(PBO)fiber/epoxy resin(EP)composites,the surfaces of acidified PBO fibers were coated with the sizing agents of waterborne polyurethane modified using γ-aminopropyltriethoxysilane(KH550).The surface chemical composition of PBO fibers was characterized by X-ray photoelectron spectroscopy(XPS)and energy dispersive spectroscopy(EDS).Scanning electron microscopy(SEM)was employed to characterize the surface morphology of PBO fibers and the tear surface morphology of PBO/EP composites.Furthermore,the mechanical properties of single PBO fibers and PBO/EP composites were analyzed.The results show that the active groups on the surfaces of PBO fibers increase significantly with the values of O/C(atomic ratio)from 0.16 to 0.25 after being coated with the sizing agents,and the defects on the surfaces of PBO fibers can be repaired effectively.By adjusting the contents and structure of the sizing agents on the fibers,the interlaminar shear strength and tensile strength of PBO/EP unidirectional composites reach 41.3 MPa and 1.70 GPa,respectively.In contrast to the untreated ones,the interlaminar shear strength and tensile strength of modified composites increase by 44.9%and 15.6%,respectively.关键词
PBO纤维/水性聚氨酯/上浆剂/界面性能/剪切强度Key words
PBO fiber/waterborne polyurethane/sizing agent/interface property/shear strength分类
通用工业技术引用本文复制引用
蒋磊,徐任信,吴书广,刘国权,丁安心,陈杨..聚氨酯上浆剂处理PBO纤维复合材料的界面性能[J].材料工程,2024,52(4):155-163,9.基金项目
民用航天预先研究项目(D010505) （D010505）
国家自然科学基金项目(21401145) （21401145）
