化工进展 ›› 2019, Vol. 38 ›› Issue (07): 3170-3175.DOI: 10.16085/j.issn.1000-6613.2018-1881

• 工业催化 • 上一篇    下一篇

有机硅浸渍漆用包覆型铂催化剂的制备

李金辉1,2(),李冰1,2,彭丹1,2,牟秋红1,2,张硕1,2,于一涛1,2,赵宁1,2,王峰1,2,张方志1,2   

  1. 1. 齐鲁工业大学(山东省科学院),山东省科学院新材料研究所
    2. 齐鲁工业大学(山东省科学院),山东省特种含硅新材料重点实验室,山东 济南 250014
  • 收稿日期:2018-09-19 出版日期:2019-07-05 发布日期:2019-07-05
  • 作者简介:信作者:李金辉(1976—),男,副研究员,研究方向为有机硅高分子材料的制备。E-mail:<email>cyclone0907@126.com</email>。
  • 基金资助:
    国家自然科学基金(51503118);山东省自然科学基金(ZR2017BB033);山东省科学院青年科学基金(2018QN0030)

Preparation of microencapsulated platinum catalysts for additive liquid silicone impregnating varnish

Jinhui LI1,2(),Bing LI1,2,Dan PENG1,2,Qiuhong MOU1,2,Shuo ZHANG1,2,Yitao YU1,2,Ning ZHAO1,2,Feng WANG1,2,Fangzhi ZHANG1,2   

  1. 1. Advanced Materials Institute, Qilu University of Technology(Shandong Academy of Sciences)
    2. Shandong Provincial Key Laboratory for Special Silicon-containing Materials, Qilu University of Technology(Shandong Academy of Sciences), Jinan 250014, Shandong, China
  • Received:2018-09-19 Online:2019-07-05 Published:2019-07-05

摘要:

包覆型催化剂是影响单组分有机硅浸渍漆稳定性的重要因素之一,本文以铂-乙烯基硅氧烷络合物、苯基三甲氧基硅烷、甲基三甲氧基硅烷、乙烯基三甲氧基硅烷等为原料,采用微乳液二次原位聚合技术制备了具有核壳结构微纳米级包覆型铂催化剂,构建了一种催化剂活性可控的包覆型催化剂体系。采用扫描电镜和热分析仪研究了包覆型催化剂的形貌和热稳定性,采用热分析仪对比分析了包覆型铂催化剂和常规铂催化剂的固化活性差异。结果表明:包覆型催化剂形态规整,粒径均匀,稳定性高,该催化剂应用在有机硅胶体系时,硅胶的起始固化温度在150℃以上,峰值固化温度在197℃,可满足浸渍漆体系在150℃以下不固化或者固化速度较慢的要求。包覆型铂催化剂在改进硅胶应用工艺方面具有广阔的应用前景。

关键词: 催化剂, 乳液, 聚合, 有机硅, 浸渍漆

Abstract:

The microencapsulated catalyst is an important factor affecting the stability of one-component silicone impregnating varnish. In this paper, core-shell microencapsulated platinum catalysts were prepared by microemulsion in-situ polymerization technology with platinum vinyl siloxane complex, phenyl trimethoxy silane, methyltrimethoxy silane and vinyl trimethoxy silane as raw materials. The morphologies were analyzed by scanning electron microscopy (SEM) and the thermal stability of the catalysts were characterized by thermal analysis. The curing activity difference between the coated catalyst and the conventional catalyst was analyzed by thermal analyzer. The results showed that the micro-nano coated Pt catalyst system has controllable catalyst activity, regular morphology, uniform particle size and high stability. When the catalyst was used in the single component additional liquid silicone rubber, the initial curing temperature was above 150℃ and the peak curing temperature was 197℃, which met the requirement of the curing process of the impregnating paint. The coated platinum catalyst possesses broad application prospects for silicone materials.

Key words: catalyst, emulsions, polymerization, organosilicon, impregnating varnish

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