摘要
将端羧基丁二烯丙烯腈橡胶(CTBN)改性为多端羟基橡胶(f-CTBN)后,掺杂功能化多壁碳纳米管(MWNTs),与4,4′-二环己基甲烷二异氰酸酯(H12MDI)反应得到预聚物,再加入聚乙二醇(PEG6000)共聚合,得到一系列聚氨酯复合材料MWNTs/PUR;采用扫描电镜(SEM)、热失重(TG)等手段进行表征;考察了MWNTs含量、固化温度等因素对聚氨酯复合材料气敏响应能力的影响。结果表明,掺杂纳米管不仅提高了聚氨酯复合材料的力学和热学性能,更增强了其对有机溶剂饱和蒸汽的气敏响应能力;当固化温度为80℃时,聚氨酯复合材料的气敏响应能力最强。
A series of polyurethane （PUR）composite adulterated carboxyl functionalized multi-walled carbon nanotubes （MWNTs） were designed and prepared on the basis of a triethanolamine-hyperbranched carboxyl- terminated poly（butadiene-co-acrylonitrile） （f-CTBN）, poly （ethylene glycol） （PEG6000） and 4,4＇-dicyclo- hexylmethane diisocyanate （H12 MDI） curing agents. The morphology and mechanical performance of composite were characterized through SEM, TG etc. The effects of sensor conditions, such as MWNTs content, curing temperature etc, were investigated. The results showed that adulterating MWNTs caused the mechanics and thermology to be significantly higher than that of pure PUR. Furthermore, vapor sensitivity response properties of composite were increased in saturated organic vapors to some extent. Gladly, vapor sensitivity response properties for all kinds of composites were superiority at 80 ~C.
出处
《化学与生物工程》
CAS
2011年第8期52-56,80,共6页
Chemistry & Bioengineering
基金
西安文理学院中青年科研基金项目(kyc201014)
关键词
多壁碳纳米管
聚氨酯
复合材料
气敏响应性
multi-walled carbon nanotubes （MWNTs）
polyurethane （PUR） ~ composite
vapor sensitivity response
