耐磨改性超高分子量聚乙烯纤维的制备及性能

Preparation and properties of abrasion resistant ultrahigh molecular weight polyethylene fibers

利用萃取改性技术将γ-氨丙基三乙氧基硅烷(γ-ATPS)引入超高分子量聚乙烯(UHMWPE)纤维,再通过喷涂技术在纤维表面构筑一层氧化石墨烯(GO)涂层,以提高UHMWPE纤维的耐磨性能,研究GO涂层改性对纤维结构性能的影响。结果表明:GO与γ-ATPS间的化学反应使其牢固结合在UHMWPE纤维表面;随着γ-ATPS处理液质量分数的提高,纤维表面GO涂覆量增多,纤维熔点提高,结晶度和横向晶粒尺寸降低,纤维力学性能降低,纤维耐磨性则明显提高。综合纤维的力学性能和耐磨性能的测试结果,最佳的γ-ATPS质量分数为1%,此时改性UHMWPE纤维的耐磨系数较纯UHMWPE纤维提高了257%,而纤维强度仅降低3.8%左右。

Theγ-aminopropyl triethoxysilane(γ-ATPS)was introduced into ultrahigh molecular weight polyethylene(UHMWPE)fibers using extraction modification method,then graphene oxide(GO)coating was constructed on fiber’s surface using spray technology to increase the abrasion resistance of fibers.The structure and properties of GO coated UHMWPE fibers were studied.The results indicate that the chemical reaction between GO andγ-ATPS results in a strong bonding to the UHMWPE fiber surface.As the mass fraction ofγ-ATPS treatment solution increases,the amount of GO coating on the fiber surface increases,as well as the fiber melting point,and the crystallinity,transverse crystal size and mechanical properties of modified fibers decrease,and the abrasion resistance of modified fibers increases obviously.Combining the results of the tests on the mechanical properties and abrasion resistance of the fibers,the optimum mass fraction ofγ-ATPS is 1%,at which point the abrasion resistance of the modified UHMWPE fibers increases by 257%compared to pure UHMWPE fibers,while the fiber strength is only reduced by about 3.8%.