高性能热塑性树脂乳液上浆剂的制备与性能研究

STUDY ON PREPARATION AND PROPERTIES OF HIGH PERFORMANCE THERMOPLASTIC RESIN EMULSION SIZING AGENT

本文采用转相乳化的方法,以杂萘联苯共聚芳醚砜(PPBES)为主浆料,制备了一种热塑性乳液上浆剂。讨论了乳化剂种类、乳化剂含量、乳化温度、剪切速率、PPBES分子量对乳液性能的影响,并确定了上浆剂的最佳浓度。结果表明:当十八烷基三甲基氯化铵(STAC)作为乳化剂,乳化剂质量分数为树脂含量的18.75%,乳化温度为25℃,搅拌速率为11000 r/min,PPBES数均分子量为5000时,乳液平均粒径为110.5 nm,离心沉淀质量分数为2.01%,Zeta电位为55.1 mV;碳纤维表面能达到49.02 mJ/m^2,上浆剂最佳浓度为1.0%,复合材料弯曲强度和层间剪切强度达到1824 MPa和80.2 MPa,分别提高了13.0%和9.4%。

In this paper,a thermoplastic emulsion sizing agent was prepared by using phase inversion emulsification method,with thermoplastic resin PPBES as the main resin.The effects of emulsifiers,emulsifier content,emulsification temperature,shear rate,and molecular weight of the resin on the properties of the emulsion were discussed,and the optimal concentration of sizing agent was determined.The results showed that when using STAC as the emulsifier,mass ratio of emulsifier was 18.75%,emulsification temperature was 25℃,the shear rate was 11000 r/min,the resin number-average molecular weight was 5000,the average particle size of the emulsion was 110.5 nm,the centrifugal precipitation mass fraction was 2.01%,and Zeta potential was 55.1 mV.The surface energy of the carbon fiber reached 49.02 mJ/m^2,the optimal concentration of the sizing agent was 1.0%,the flexural strength and the interlaminar shear strength reached 1824 MPa and 80.2 MPa,respectively,which increased by 13.0%and 9.4%.