胶束改性纳米碳酸钙及其填充增塑糊触变性能研究

Study on Modification of Nano-CaCO 3 with Micelles and Its Thixotropy in Plastisol Filling

采用月桂酸钾对纳米碳酸钙表面改性,利用电导法测量了月桂酸钾临界胶束浓度为0.015 mol·dm^(-3)。考察了临界胶束浓度附近改性效果,利用水分测试、热重分析、TOC、扫描电镜、红外光谱、接触角、流变仪等测试手段对纳米碳酸钙和填充增塑糊进行表征。临界胶束浓度附近表面改性的纳米碳酸钙水分最低,相应的填充增塑糊制品触变效果最好,浓度提高会使触变性变差,屈服应力下降。

The critical micellar concentration of potassium laurate was about 0.015 mol·dm-3 measured by conductivity method.The modification effect nearby the critical micellar concentration was investigated.The nano-CaCO 3 and the plastisol were characterized by moisture,TG,TOC,SEM,FT-IR,Measurement of contact angle and rheometer.Under the critical micellar concentration modification,the nano-CaCO 3 has the lowest moisture,and the plastisol filled with it has the best thixotropy.The increase of the concentration to modification will make the plastisol’s thixotropy worse and the yield stress decrease.