PLA/黄麻层压复合材料的紫外老化性能  

UV Aging Properties of PLA/Jute Laminated Composites

作　　者：邹婷 宋雪旸 王萍[1] ZOU Ting;SONG Xue-yang;WANG Ping(College of Textile and Clothing Engineering,Soochow University,Suzhou Jiangsu 215000,China)

机构地区：[1]苏州大学纺织与服装工程学院,江苏苏州215000

出　　处：《武汉纺织大学学报》2022年第4期17-21,共5页Journal of Wuhan Textile University

基　　金：国家自然科学基金-青年科学基金项目(11602156);2021江苏省先进纺织工程技术中心开放课题基金科研项目-重点项目(XJFZ/2021/3);中国纺织工业联合会科技指导性项目(2020064).

摘　　要：为了探索紫外照射对PLA/黄麻层压复合材料性能的影响,延长复合材料在实际应用中的使用寿命,采用模压成型法和薄膜堆叠法制备PLA/黄麻层压复合材料,研究紫外老化时间对复合材料力学性能的影响,并对复合材料拉伸后的断口形貌进行分析。结果表明:随着紫外老化时间的延长,复合材料的拉伸和弯曲性能均表现为先上升后下降,均在老化48 h后达到最大,拉伸强度、拉伸模量、弯曲强度和弯曲模量较未老化的复合材料分别提高了约19.29%、17.73%、23.49%和24.97%。这可能是由于在老化时间较短时,PLA分子链交联占据主导作用,提高了界面粘结性。随着老化时间进一步延长,拉伸和弯曲性能开始不断下降,这可能是由于PLA分子链的老化断裂开始起主导作用,导致界面粘结性下降。In order to explore the effect of UV irradiation time on the properties of PLA/jute laminated composites and increase the service life of composites in practical application,PLA/jute laminated composites were prepared by molding method and film stacking method.The effects of UV aging time on the mechanical properties of the composites were studied,and the fracture morphology of the composites after tensile was analyzed.The results show that with the extension of UV aging time,the tensile properties and flexural properties of composites first increase and then decrease,reaching the maximum after aging for 48 h.The tensile strength,tensile modulus,flexural strength and flexural modulus were increased by 19.29%,17.73%,23.49%and 24.97%respectively.This may be due to the fact that PLA molecular chain crosslinking plays a dominant role with relatively short aging time,which improves the interfacial adhesion.With the further extension of aging time,the tensile properties and flexural properties began to decrease continuously.This may be due to the aging and fracture of PLA chains play a dominant role,which leads to the decrease of inter-facial adhesion.

关 键 词：黄麻 PLA 复合材料 紫外老化 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]