摘要
在无溶剂条件下,通过硅氢加成法将烯丙基聚氧乙烯聚氧丙烯醚(PE)接枝共聚到含氢硅油(PHMS)侧链,合成了聚醚改性硅油(PMS),并使其乳化二甲基硅油(PDMS)制得有机硅消泡剂乳液(SAF)。研究了聚醚与含氢硅油的配比、聚醚改性硅油含量、体系pH值、温度对产品性能的影响;分析了SAF对4种造纸发泡液体系的消泡抑泡性能的影响;通过红外光谱、动态激光光散射等对PMS及SAF粒径进行了表征。实验结果表明,当m(PE)∶m(PHMS)为0.56,m(PMS)∶m(PDMS)为0.20时制得的SAF具有较佳的消泡抑泡性能,SAF在高温、酸、碱条件下均可保持优良的消泡抑泡性能,其使用效果优于市售同类产品,可满足工业生产要求。
Polyether modified silicone （PMS） was synthesized through graft copolymerization of allyl polyoxyethylene polyoxypropylene ether （PE） and polymethylhydrosiloxane （PHMS） under solvent-free condition, and then a series of organosilicon defoamers （SAF） were obtained with PMS as emulsifier. They were characterized by PF-IR spectroscopy and DLLS. Antifoaming function of defoamer for different bubbly systems, and effects of pH value, temperature, the mass ratio of PE to PHMS and PMS dosage on SAF properties were analyzed. The results indicated that SAF is endowed with excellent defoaming and foam suppression properties when the mass ratio of PE to PHMS is 0.56, and mass ratio of PMS to PDMS is O. 20. It was also found that SAF can defoam rapidly in 3 s for various foamer systems （250 g foamer-agent, 1000 mL foam）, and foam suppression time exceeds 4200 s. In addition, its defoaming and foam suppression properties can be maintained in different acid-base condition and different temperature （ 10 - 90℃ ）. Furthermore, with adding 0. 25 mL SAF （ based on the volume of foamer system）, its performance is superior to the common commercial products and meets the requirement of industrial application.
出处
《中国造纸学报》
CAS
CSCD
北大核心
2009年第2期51-55,共5页
Transactions of China Pulp and Paper
关键词
聚醚改性硅油
二甲基硅油
消泡剂
抑泡性
polyether modified silicone
dimethyl silicone
defoamer
antifoaming property
