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目前市售渗透剂中缺少低泡品种,该文尝试对辛基/癸基聚氧乙烯醚(OEO)进行硅封端改性,在保持与改性前体OEO相似渗透性的前提下,进一步增强其低泡特性使其成为低泡渗透剂。该文用3种甲基氯硅烷类试剂对OEO改性合成了3种新型硅改性渗透剂,分别是辛基/癸基聚氧乙烯醚三甲基硅烷(OTS)、辛基/癸基聚氧乙烯醚二甲基硅醇(ODS)和辛基/癸基聚氧乙烯醚甲基硅二醇(OMS),并用FTIR和1HNMR表征,证实得到了预期的目标产物。然后,在市售渗透剂通常用量范围(质量分数0.1%～0.25%),考察它们的起泡体积和渗透时间随用量的变化率;还考察了比泡沫随时间的变化率,用以表征水解稳定性。结果表明,3种硅改性渗透剂中OMS和ODS基本保持了优良渗透性并显示了很好的水解稳定性,同时3种硅改性渗透剂的低泡性能均很好。
At present, there is a lack of low-foam varieties in the market penetrant. Under the premise of preserving the similar permeability of OEO with octyl / decyl polyoxyethylene ether (OEO) Enhance its low foam properties make it a low sudsing penetrant. In this paper, three kinds of new silicon-modified penetrants were synthesized by OEO modification using three kinds of methylchlorosilane reagents, namely octyl / decyl polyoxyethylene ether trimethylsilane (OTS), octyl / decyl Polyoxyethylene ether dimethylsilanol (ODS) and octyl / decyl polyoxyethylene methyl ether diol (OMS) were synthesized and characterized by FTIR and 1HNMR to confirm the expected target product. Then, the rate of change of the foaming volume and the permeation time with the amount used in the usual range of the penetrant (mass fraction of 0.1% to 0.25%) on the market is examined; and the rate of change over time of the specific foam is also examined to characterize the hydrolysis stability. The results show that OMS and ODS in the three kinds of silicon-modified penetrants basically maintain good permeability and show good hydrolytic stability, and the three kinds of silicon-modified penetrants have good low-foam properties.