破乳剂对预交联颗粒凝胶界面扩张流变的影响

摘要

The effects of nonionic polyether demulsifiers with star-type ( PES) , comb-type ( PEB) , branched structure ( PEB) and cationic reverse emulsifier (HY01) on interfacial film of preformed particle gel (PPG) were studied by interfacial dilation-al method. The experimental results show that the nonionic polyether demulsifiers displace PPG molecules at the interface by competitive adsorption, which decreases the interfacial dilational modulus and weakens the film strength. The star-typed demul-sifier has significant effect on the interfacial structure. The reverse demulsifier influences the PPG interfacial film properties through the electrostatic interaction, which leads to the higher interfacial film strength due to the formation of interfacial com-plexes at certain concentration. However, reverse demulsifier with high concentration could also destroy the interfacial film.%利用界面扩张流变方法研究星型( PES)、梳型( PEC)和支链型( PEB)非离子聚醚类破乳剂以及阳离子反相破乳剂(HY01)对预交联颗粒凝胶(PPG)界面膜性质的影响。结果表明：聚醚类非离子破乳剂通过竞争吸附，顶替界面上的PPG分子，能够降低界面扩张模量，破坏界面膜强度；星型的分子结构对界面层结构的影响效果最强；反相破乳剂通过静电相互作用影响PPG界面膜的性质，在适宜浓度形成界面复合物，界面膜强度较大，而高浓度的反相破乳剂仍然对界面膜产生破坏作用。