纳米CaCO_(3)改性聚氨酯复合材料的制备及性能研究  

Preparation and properties of nano-CaCO_(3) modified polyurethane composites

作　　者：崔衍刚 张锐 宁晓骏[2] CUI Yangang;ZHANG Rui;NING Xiaojun(The 4th Engineering Co.,Ltd.,China Railway 12th Bureau Group,Xi an 710024,China;School of Architectural Engineering of Kunming University of Science and Technology,Kunming 650000,China)

机构地区：[1]中铁十二局集团第四工程有限公司,西安471023 [2]昆明理工大学建筑工程学院,昆明650000

出　　处：《功能材料》2022年第7期7083-7087,共5页Journal of Functional Materials

基　　金：国家自然科学基金项目(51068012);中铁十二局集团科研开发计划项目(ZT12-2019研补-7)。

摘　　要：以纳米CaCO_(3)为增强材料,通过预聚体法制备了不同纳米CaCO_(3)掺杂的聚氨酯复合材料,研究了纳米CaCO_(3)改性聚氨酯复合材料的力学性能、微观形貌、磨损性能和热稳定性能。结果表明,纳米CaCO_(3)的掺杂没有改变聚氨酯的结构,但改善了复合材料的微观形貌和整体的均匀性,提升了复合材料的力学性能、磨损性能和热稳定性。随着纳米CaCO_(3)掺杂量的增加,改性聚氨酯复合材料的拉伸强度、断裂延伸率和残余量先升高后降低,磨损量先降低后升高。当纳米CaCO_(3)的掺杂量为3%(质量分数)时,复合材料的拉伸强度、断裂延伸率和残余量达到了最大值,分别为33.7 MPa、510.2%和4.4%,磨损量最低为50.1 mg。综合分析可知,纳米CaCO_(3)的最佳掺杂量为3%(质量分数)。Polyurethane composites doped with different nano-CaCO_(3) were prepared by prepolymer method with nano-CaCO_(3) as reinforcement.The mechanical properties,micro morphology,wear properties and thermal stability of nano-CaCO_(3) modified polyurethane composites were studied.The results showed that the doping of nano-CaCO_(3) didn't change the structure of polyurethane,but improved the micro morphology and overall uniformity of the composites,and improved the mechanical properties,wear properties and thermal stability of the composites.With the increase of nano-CaCO_(3) doping,the tensile strength,fracture elongation and residual amount of modified polyurethane composites first increased and then decreased,and the wear amount first decreased and then increased.When the doping amount of nano-CaCO_(3) was 3 wt%,the tensile strength,fracture elongation and residual amount of the composite reached the maximum,which were 33.7 MPa,510.2%and 4.4%,respectively,and the minimum wear amount was 50.1 mg.Comprehensive analysis shows that the optimal doping amount of nano-CaCO_(3) was 3 wt%.

关 键 词：纳米CaCO_(3) 聚氨酯 力学性能 磨损性能 热稳定性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业] TQ050.4