聚醚与长链烷烃共改性硅油的研究及应用*

Study and Application of Polyether and Alkyl Modified Silicone Oil

摘要:

采用含氢硅油（PHMS）、烯丙基聚醚（FB1000）与不同质量的丙烯酸十八酯（SA）制备了系列具有侧链结构的高分子表面活性剂（PSA）。利用红外光谱（FT-IR）、核磁（NMR）、凝胶渗透色谱仪（GPC）、表面张力、动态激光光散射仪（DLS）、荧光光谱 (FLD)对产物的结构与溶液性质进行了表征和研究。结果表明随着SA含量的增加，聚合物越易聚集缔合形成胶束，粒径从71.40nm增加到141.07nm，粒度分散系数（PDI）增大至0.396，随着疏水基团的增加，溶液表面张力降低至24.20mN/m，临界胶束浓度(cmc)下降至0.49g/L。荧光光谱表明，聚合物溶液浓度增大到一定值时，溶液中会形成疏水微区，第一第三发射峰的比值（I1/I3）不断减小，达到临界缔合浓度（cac）后，芘分子会增溶到胶束中I1/I3趋于稳定。破乳实验结果表明，聚合物PSA的破乳脱水率达93%。

Abstract:

A series of branched polymer surfactant (PSA) was prepared by using hydrogen silicone oil (PHMS), allyl polyether(FB1000) and different content of eighteen acrylic ester(SA) as raw materials. The structure and the solution property of polymer was characterized and investigated by infrared spectroscopy (FT-IR), nuclear magnetic resonance(NMR), gel permeation chromatography(GPC), surface tension, dynamic light scattering (DLS) and fluorescence spectroscopy (FLD). With the increase of SA content, it is easier for polymer to associate and aggregate together to form micelles, the particle size increased from 71.40nm to 141.07nm and the dispersion coefficient increased to 0.396. Moreover, the surface tension of polymer solution reduced to 24.20mN/m, and critical micelle concentration (cmc) decreased to 0.49g/L as increasing the content of hydrophobic groups. The fluorescence spectra showed that hydrophobic microdomain was formed with an increase in the PSA concentration, and the first and third emission peak ratio gradually decreased. Pyrene molecules dissolved into the micelles and I1/I3 value kept almost invariable when the PSA concentration was greater than the critical aggregation concentration (cac). The demulsification experiments demonstrated that the dewatering ratio of PSA demulsifier is up to 93%.