Page 218 - 《精细化工》2020年第8期

第 37 卷第 8 期 精 细 化 工 Vol.37, No.8
202 0 年 8 月 FINE CHEMICALS Aug. 2020

建筑用化学品
液态聚有机硅氧烷高速剪切过程中的雾化抑制剂

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张 濬 1,2 ，桂雪峰 ，涂园园 ，黄振祝 ，林树东 1,2 ，胡继文 1,2,3*
〔1. 中国科学院广州化学研究所 广东省电子有机聚合物材料重点实验室 中国科学院新型特种精细化学
品工程实验室，广东 广州 510650；2. 中国科学院大学，北京 100049；3. 国科广化（南雄）新材料研
究院有限公司，广东 南雄 512400〕

摘要：液态有机硅在高速涂布过程中容易产生“雾化”现象。采用端乙烯基聚二甲基硅氧烷（PDMS-Vi）和含
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氢聚硅氧烷催化合成交联的有机硅聚二甲基硅氧烷黏弹性液体，采用 FTIR 和 HNMR 对其进行了表征。讨论了
雾化抑制剂结构、PDMS-Vi 相对分子质量、交联剂的含氢量及雾化抑制剂的质量分数对雾化抑制剂雾化抑制效
率（A fe ）的影响，并将这种黏弹性液体作为有机硅高速剪切过程的雾化抑制剂，与商业雾化抑制剂进行了对比。
雾化抑制剂的凝胶率受原料物质的量之比 n(C==C)∶n(Si—H)影响；当 PDMS-Vi 相对分子质量从 5759 增大到
33750 时，雾化抑制效率从 85.9%增加到 95.9%；含氢聚硅氧烷的含氢量为 5.5 mmol/g 时，制备的样品具有更好
的雾化抑制效率。这些因素会影响雾化抑制剂的交联网络结构，交联密度低、交联结构整齐会使雾化抑制效率
提高。
关键词：有机硅；高速剪切；雾化抑制剂；交联；雾化抑制效率
中图分类号：TQ264.1 文献标识码：A 文章编号：1003-5214 (2020) 08-1716-08

Anti-fogging agents for liquid polydimethylsiloxane under high sheering speed

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ZHANG Jun , GUI Xuefeng , TU Yuanyuan , HUANG Zhenzhu ,
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LIN Shudong , HU Jiwen 1,2,3*
[1. Key Laboratory of Electronic Organic Polymer Materials of Guangdong Province, CAS Engineering Laboratory for
Special Fine Chemicals, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650,
Guangdong, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. CASH GCC (Nanxiong)
Research Institute of New Materials Co., Ltd., Nanxiong 512400, Guangdong, China]
Abstract: Liquid organosilicon is easy to produce “atomization” in the process of high-speed coating.
Cross-linked organosilicon polydimethylsiloxane viscoelastic liquids were catalytically synthesized from
vinylterminated polydimethylsiloxane (PDMS-Vi) and hydrogen-containing polysiloxane and characterized
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by FTIR and HNMR. The effects of anti-fogging agent structure, relative molecular mass of PDMS-Vi,
hydrogen content of hydrogen-containing polysiloxane (as crosslinker) and mass fraction of anti-fogging
agent on the anti-fogging efficiency (A fe) were discussed. The prepared viscoelastic liquids were used as
anti-fogging agents in the high-speed shearing process of liquid polydimethylsiloxane and their properties
were compared with commercial anti-fogging agents. The results showed that the gelation rate of the
prepared anti-fogging agent was affected by n(C==C)∶n(Si—H) in polysiloxane. When the relative
molecular mass of PDMS-Vi increased from 5759 to 33750, the anti-fogging efficiency increased from
85.9% to 95.9%. When the hydrogen content of hydrogen-containing polysiloxane was 5.5 mmol/g, the
prepared sample had better anti-fogging efficiency. These factors will affect the crosslinking network
structure of anti-fogging efficiency. Low crosslinking density and neat crosslinking structure will improve
the efficiency of anti-fogging efficiency.
Key words: organosilicone; high-speed shearing; anti-fogging agent; cross-linking; anti-fogging efficiency

收稿日期：2020-03-13; 定用日期：2020-04-28; DOI: 10.13550/j.jxhg.20200197
基金项目：广州市科技计划项目（201802010018）
作者简介： 张 濬（1992—），男，硕士生，E-mail：zhangjun@gic.ac.cn。联系人：胡继文(1966—)，男，教授，E-mail：hujiwen@gic.ac.cn。