聚醚与长链烷烃酯共改性硅油的合成及应用

Synthesis and Application of Silicone Oil Modified by Polyether and Long Alkyl Ester

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）反应制备了具有侧链结构的高分子表面活性剂（PSA）。利用FTIR、~1HNMR、GPC、表面张力仪、动态激光光散射仪（DLS）、荧光光谱仪（FLD）对产物的结构与溶液性质进行了测定。结果表明,随着SA用量的增加,聚合物越易聚集缔合形成胶束,粒径从71.40 nm增加到141.07 nm,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24.20 m N/m,临界胶束质量浓度（CMC）降至0.49 g/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%。

A series of polymer surfactant（PSA） with side chain structure was prepared with hydrogen silicone oil（PHMS）,allyl polyether（FB1000） and different content of octadecyl acrylate（SA） as raw materials. The structure and solution properties of the obtained product were characterized and investigated by FTIR,~1HNMR,GPC,surface tension,dynamic light scattering（DLS） and fluorescence spectroscopy（FLD）. The results revealed that with the increase of SA dosage,the polymer easily associated and aggregated together to form micelles,the particle size increased from 71. 40 nm to141. 07 nm and the particle dispersion index（PDI） increased to 0. 396. Moreover,the surface tension of the polymer solution reduced to 24. 20 m N/m,and the critical micelle concentration（CMC） decreased to 0. 49 g/L when the amount of hydrophobic groups increased. The fluorescence spectra measurement showed that when the concentration of the polymer attain to certain value,hydrophobic microdomain could form in the solution. And the first and the third emission peak intensity ratio（I1/I3） gradually decreased. However,when the concentration of the polymer was greater than the critical aggregation concentration（CAC）,pyrene molecules dissolved into the micelles and I1/I3 value maintain a constant.The demulsification experiments demonstrated that the dehydration ratio of PSA was up to 93%.