Qiang Taotao, Bu Qiaoqiao, Huang Zhaofeng, Wang Xuechuan
Key Laboratory of Auxiliary Chemistry and Technology for Light Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an, 710021 Shaanxi China ; Shaanxi Research Institute of Agricultural Products Processing Technology, Xi'an, 710021 Shaanxi China.
Key Laboratory of Auxiliary Chemistry and Technology for Light Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an, 710021 Shaanxi China.
J Surfactants Deterg. 2014;17(5):959-965. doi: 10.1007/s11743-014-1592-3. Epub 2014 May 15.
With oleic acid grafting modification, a series of hyperbranched-linear polymer surfactants (HLPS) were prepared by hydroxyl-terminated hyperbranched polymer (HBP), which was gained through a step synthesis method using trimethylolpropane and AB monomer. The AB monomers were obtained through the Michael addition reaction of methyl acrylate and diethanol amine. The structures of HLPS were characterised by Fourier transform infrared spectrophotometer and nuclear magnetic resonance (NMR), which indicated that HBP was successfully modified by oleic acid. Furthermore, the properties of surface tension and critical micelle concentration of HLPS solution showed that HLPS can significantly reduce the surface tension of water. The morphology of the HLPS solution was characterised by dynamic light scattering, which revealed that HLPS exhibited a nonmonotonic appearance in particle size at different scattering angles owing to the different replaced linear portions. The relationships of the surface pressure to monolayer area and time were measured using the Langmuir-Blodgett instrument, which showed that the surface tension of monolayer molecules increased with the increasing of hydrophobic groups. In addition, the interface conditions of different replaced HLPS solutions were simulated.
通过油酸接枝改性，以三羟甲基丙烷和AB单体采用逐步合成法得到的端羟基超支化聚合物（HBP）制备了一系列超支化-线性聚合物表面活性剂（HLPS）。AB单体通过丙烯酸甲酯与二乙醇胺的迈克尔加成反应获得。采用傅里叶变换红外光谱仪和核磁共振（NMR）对HLPS的结构进行了表征，结果表明HBP成功地被油酸改性。此外，HLPS溶液的表面张力和临界胶束浓度性质表明HLPS能显著降低水的表面张力。采用动态光散射对HLPS溶液的形态进行了表征，结果表明由于被取代的线性部分不同，HLPS在不同散射角下的粒径呈现非单调变化。使用朗缪尔-布洛杰特仪器测量了表面压力与单层面积和时间的关系，结果表明单层分子的表面张力随着疏水基团的增加而增大。此外，还模拟了不同取代的HLPS溶液的界面条件。
