Nanoparticles Encapsulated Graphites as Excellent Flame Retardants for Rigid Polyurethane Foams
Encapsulation of expandable graphite (EG) particles by organic or inorganic shells has been proved to be efficient to enhance the expandability of EG, thus to improve the flame retardancy effciency of EG.In this research, EG was encapsulated with inorganic nanoparticles layers-aluminum hydroxide (ATH), forming complex particles EG@ATH with core-shell structure.The expandability of the particles was enhanced from 163 to 197 mL/gafter deposition of the ATH shell, leading to better flame-retardant performance in RPUF.At the content of 11.5 wt.%, the limited oxygen index (LOI) could be increased from 21.5 % to 29.6 % by EG@ATH, in comparison to 27.5% by the physical mixture of EG and ATH (EG+ATH).It is worth noticing that ATH could react with isocyanate groups, the interaction between particles and the polymer matrix was enhanced.
Yintao Wang Peng Liu Feng Wang Mingshu Yang
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics,Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
国际会议
杭州
英文
87-88
2018-06-14（万方平台首次上网日期，不代表论文的发表时间）