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以含氢硅油(PHMS)、烯丙基聚醚(PE)为原料,氯铂酸-异丙醇为催化剂制备聚醚改性有机硅(PMS)表面活性剂;考察了其对不同黏度二甲基硅油(PDMS)的乳化性能;并利用红外光谱、全自动界面张力仪等对其进行表征。通过正交试验确定合成的较佳条件为:m(PE)/m(PHMS)=1、90℃反应5h、催化剂用量(Pt)2.0×10-3%,该条件下PHMS的反应转化率高达93.5%。PMS的临界胶束浓度(CMC)为8.5×10-6mol/L,表面张力γCMC为29.5mN/m,对二甲基硅油具有优良的乳化作用。所制有机硅乳液(SAF)对十二烷基磺酸钠起泡体系具有良好的消抑泡性能,且在10~90℃温度范围、酸碱条件下,均可持续保持消抑泡活性。
Polyether-modified silicone (PMS) surfactant was prepared by using hydrogen silicone oil (PHMS) and allyl polyether (PE) as raw materials and chloroplatinic acid-isopropanol as catalyst. Based silicone oil (PDMS) emulsification properties; and the use of infrared spectroscopy, fully automatic interface tension meter to characterize them. The optimal conditions for the synthesis were determined by orthogonal experiments: the reaction conditions were: m (PE) / m (PHMS) = 1,90 ℃ for 5h and Pt (catalyst) 2.0 × 10-3% 93.5%. The critical micelle concentration (CMC) of PMS was 8.5 × 10-6mol / L, and the surface tension γCMC was 29.5mN / m. PMS had excellent emulsifying effect on simethicone. The prepared silicone emulsion (SAF) has good anti-foaming properties to the sodium lauryl sulphate foaming system, and maintains the anti-foaming activity at the temperature range of 10-90 ℃ under acid-base conditions.