主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2022, Vol. 41 ›› Issue (7): 978-981.

• • 上一篇    下一篇

硅氧烷黏度和云母粉含量对有机硅泡沫的影响

商 珂1，姜慧婧2，林贵德1，王俊胜1   

  1. （1.应急管理部天津消防研究所，天津 300381； 2.天津理工大学 环境科学与安全工程学院，天津 300384）
  • 出版日期:2022-07-15 发布日期:2022-07-15
  • 作者简介:作者简介：商 珂（1990-），男，山东济宁人，应急管理部天津消防研究所助理研究员，博士，主要从事防火阻燃材料和消防员个人防护装备研究，天津市南开区卫津南路110号，300381。
  • 基金资助:
    国家重点研发计划项目（2020YFB0311302，2020YFB0311300）

Effect of siloxane viscosity and mica powder content on silicone foam

SHANG Ke1, JIANG Hui-jing2, LIN Gui-de1, WANG Jun-sheng1   

  1. (1. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China; 2. School of Environmental Science and Safety Engineering，Tianjin University of Technology, Tianjin 300384, China)
  • Online:2022-07-15 Published:2022-07-15

摘要： 以不同黏度α,ω-二羟基聚硅氧烷和端乙烯基聚二甲基硅氧烷为原料，云母粉为无机填料，制备有机硅泡沫。采用扫描电子显微镜、氧指数、锥形量热和热重分析等测试手段，研究硅氧烷黏度和无机填料含量对有机硅泡沫微观形貌、阻燃性能和热稳定性的影响。结果表明，硅氧烷黏度的变化会极大地影响有机硅泡沫的微观形貌和热稳定性；α,ω-二羟基聚硅氧烷黏度的升高对有机硅泡沫的阻燃性能起到负面影响，而端乙烯基聚二甲基硅氧烷黏度的变化对其阻燃性能影响较小；另外，无机填料的引入能够显著降低有机硅泡沫的泡孔孔径，并极大地提升其阻燃性能和热稳定性。

关键词: 关键词：有机硅泡沫, 硅氧烷黏度, 云母粉, 微观形貌, 阻燃性能, 热稳定性

Abstract: Abstract: The silicone foams were prepared using different viscosity α,ω-dihydroxy polysiloxane and vinyl-terminated polydimethylsiloxane as base materials and mica powder as inorganic filler. The effects of siloxane viscosity and inorganic filler content on the microstructure, flame retardancy and thermal stability of silicone foam were investigated by means of scanning electron microscopy, limiting oxygen index, cone calorimetry and thermogravimetric analysis. The results show that the changes in the viscosity of α,ω-dihydroxy polysiloxane and vinyl-terminated polydimethylsiloxane will greatly affect the microstructure and thermal stability of silicone foam. The increase of α,ω-dihydroxy polysiloxane viscosity has a negative effect on the flame retardancy of silicone foam, while the change of vinyl-terminated polydimethylsiloxane viscosity has little effect on its flame retardancy. In addition, the introduction of inorganic fillers can significantly reduce the pore size of silicone foam and greatly enhance its flame retardancy and thermal stability.

Key words: Key words: silicone foam, siloxane viscosity, mica power, microstructure, flame retardancy, thermal stability