CF表面处理对SLS用PA12/CF复合材料性能的影响  

Effect of Carbon Fiber Surface Treatment on Properties of Nylon 12/Carbon Fiber Composite for SLS

作　　者：袁春霞[1] 汪艳[1,2] 彭梦飞 Yuan Chunxia;Wang Yan;Peng Mengfei(School of Materials Science and Engeering, Wuhan Institute of Technology, Wuhan 430073, China;Guangdong Silver Age Sci & Tech Co., Ltd., Dongguan 523000, China)

机构地区：[1]武汉工程大学材料科学与工程学院,武汉430073 [2]广东银禧科技股份有限公司,广东东莞523000

出　　处：《工程塑料应用》2017年第9期63-66,共4页Engineering Plastics Application

基　　金：广东省引进创新创业团队计划项目(2013C071)

摘　　要：利用热空气处理法和浓硝酸处理法分别对碳纤维(CF)进行表面处理,然后与尼龙(PA)12粉末按量比3∶7通过机械混合法制备PA12/CF复合粉末材料。将复合粉末材料进行注塑成型,考察了热处理温度及浓硝酸处理时间对复合材料力学性能和热性能的影响。结果表明,浓硝酸处理时间为1 h处理效果最好,与未处理的CF复合材料相比,注塑样条拉伸强度提高23%,弯曲弹性模量提高133%,维卡软化点提高6.2℃;扫描电子显微镜分析表明,经过热处理后的CF在PA12基体中分散均匀,两者的界面相容性良好。The surface of carbon fiber(CF)was treated by hot air treatment and concentrated nitric acid treatment.Thennylon(PA)12/CF composite powder was prepared by mechanical mixing.The mass ratio of carbon fiber to nylon12was3∶7.The composite powder material was injection molded,and the effects of heat treatment temperature and concentrated nitric acidtreatment time on the mechanical properties and thermal properties of the composite powder material were investigated.The resultsshow that the treatment effect is best when the condition of concentrated nitric acid treatment is1h,the tensile strength of injectionmolded strip is increased by23%,the flexural modulus is increased by133%,and VEKA softening point is increased by about6.2℃.Scanning electron microscope results show that the treated carbon fibers are uniformly dispersed in PA12matrix,and the interfacialcompatibility is good.

关 键 词：尼龙12 碳纤维 热空气处理 浓硝酸处理 选择性激光烧结 

分 类 号：TQ327.3[化学工程—合成树脂塑料工业]