摘要
采用硅烷偶联剂KH550对炭黑(CB)进行了改性,得到了KH550改性的CB(KH550/CB),通过FTIR、DLS和SEM对CB和KH550/CB进行了表征,采用共混法和流延浇铸法分别制备了CB/水性聚氨酯(CB/WPU)复合材料与KH550/CB/水性聚氨酯(KH550/CB/WPU)复合材料。利用直写式3D打印,探讨了不同的填充图案和填充率对KH550/CB/WPU复合材料性能的影响。结果表明,KH550/CB粒径约为620 nm,分散均匀,在WPU基体中分散性更好,导电粒子之间连接得更紧密。当CB与KH550/CB含量(以WPU质量为基准,下同)均为3%时,KH550/CB/WPU复合材料的电导率为1.79×10^(-3)S/m,比CB/WPU复合材料的电导率增加了14倍;CB与KH550/CB含量均为2%时,KH550/CB/WPU复合材料的拉伸强度比CB/WPU复合材料增加了175%。选择填充图案为线形、填充率为80%时,KH550/CB/WPU导电性能较好,电导率达到2.66×10^(-3)S/m,与其他非3D打印产品相比,其导电性能提升了1~2个数量级。
KH550 modified carbon black(CB)(KH550/CB)was obtained from CB with silane coupling agent KH550.KH550/CB were then characterized by FTIR,DLS and SEM.CB/waterborne polyurethane(CB/WPU)composites and KH550/CB/waterborne polyurethane(KH550/CB/WPU)composites were further prepared by blending and casting method,respectively.The effects of filling pattern and filling rate on the properties of KH550/CB/WPU composites were investigated thorugh direct-write 3D printing.The results showed that KH550/CB had a uniformly distributed particle size of about 620 nm,and exhibited better dispersion in WPU matrix with the conductive particles connected more closely.When content of both CB and KH550/CB(based on the mass of WPU,the same below)was 3% in the composites,the conductivity of KH550/CB/WPU composites was 1.79×10^(-3)S/m,14 times higher than that of CB/WPU composites.When content of both was 2%,the tensile strength of KH550/CB/WPU composites was 175% higher than that of CB/WPU composites.When the filling pattern was linear and the filling rate was 80%,KH550/CB/WPU displayed good conductivity of 2.66×10^(-3)S/m,improved 1~2 orders of magnitude in comparison to other non-3D printed products.
作者
郑玲
邓鑫
焦晓岚
赵秀平
ZHENG Ling;DENG Xin;JIAO Xiaolan;ZHAO Xiuping(School of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,Hunan,China;Hunan Province Key Laboratory of Materials Surface&Interface Science and Technology,Central South University of Forestry and Technology,Changsha 410004,Hunan,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2023年第3期565-571,583,共8页
Fine Chemicals
基金
湖南省自然科学基金-省市联合基金项目(2019JJ60075)
材料表界面科学与技术湖南省重点实验室开放课题。
关键词
水性聚氨酯
炭黑
共混
电导率
直写3D打印
功能材料
waterborne polyurethane
carbon black
blending
conductivity
direct-write 3D printing
functional materials
