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以氢化苯基甲烷二异氰酸酯(H-MDI)、聚氧乙烯长链烷基胺(PAE)、二羟甲基丙酸(DMPA)为主要原料,合成了一系列侧链含长链烷基和羧基、主链嵌入环氧乙烷(EO)结构的两性离子型聚氨酯表面活性剂(APU)。通过红外光谱(FTIR)、表面张力、临界胶束浓度、粒径以及电导率对其进行了分析。结果表明,当以PAE为软段单体,n(PAE)∶n(DMPA)=1∶1时,合成的聚氨酯高分子表面活性剂综合性能优异,溶液的临界胶束质量浓度为32.26 mg/L,水溶液的表面张力最低可达40.42 m N/m,且其等电区为3.5~5.5,分布较窄,可在较宽p H范围的水性体系中使用。
Hydrogenated phenylmethane diisocyanate (H-MDI), polyoxyethylene long chain alkyl amine (PAE), dimethylolpropionic acid (DMPA) as the main raw material, a series of side chain containing long chain alkyl and Carboxyl, Zwitterionic Polyurethane Surfactant (APU) with backbone embedded in ethylene oxide (EO) structure. It was analyzed by infrared spectroscopy (FTIR), surface tension, critical micelle concentration, particle size and conductivity. The results show that the synthesis of polyurethane polymer surfactant is excellent when the PAE is soft segment monomer and n (PAE): n (DMPA) = 1: 1, the critical micelle mass concentration is 32.26 mg / L, the surface tension of aqueous solution is as low as 40.42 mN / m, and the isoelectric region is 3.5-5.5. It has a narrow distribution and can be used in an aqueous system with a wide p H range.