【摘要】 采用微波辅助技术进行了烯丙醇聚氧烷基醚改性甲基含氢硅氧烷的合成。通过单因素实验考察了主要操作参数对Si-H转化率的影响并确定了最适宜的工艺条件。结果表明,在最适宜的微波功率280 W,原料醚/烷摩尔比1.2∶1.0、催化剂用量2.0×10-4%和微波辐射时间25 min的条件下,转化率达到99.80%。傅里叶红外表征显示原料聚醚中的C=C键与硅氧烷中的Si-H键均已发生反应生成了目标产物。用合成产物制备的复配消泡剂具有优良的稳定和水分散性能,其消泡和抑泡性能明显好于国产消泡剂,高温下消泡性能优于国外奥地利产品。微波辅助加热比常规加热大大节省了时间,降低了能耗。更多还原

【Abstract】 The microwave-assisted modification of allyl alcohol polyethylene oxide ether on methane hydrogen siloxane was carried out. The single factor experiment was used to investigate the effects of operation parameters on Si-H conversion rate and to determine the optimum process conditions. The results show that the optimum conditions are microwave power 280 W,raw material molar ratio of ether / alkanes1. 2 ∶1. 0,catalyst dosage 2. 0×10-4%and microwave radiation time 25 min,under which the conversion rate reaches99. 80%. The Fourier infrared characterization displays that the C = C bond in polyether and Si-H bond in siloxane have reacted to generate the target product. The compound defoamer prepared by the synthesized product has excellent stability and water dispersion property,its defoaming and foam inhibition performances are better than those of the domestic defoamers,and its defoaming ability is superior to that of the defoamer produced in Austria at high temperature. Microwave assisted heating can greatly save the preparation time and reduce the energy consumption.更多还原