阻燃硬质聚氨酯泡沫/羟基化氮化硼纳米复合材料的制备与性能  

Preparation and Properties of Flame Retardant Rigid Polyurethane Foam/Hydroxylated Boron Nitride Nanocomposites

作　　者：王乾 许培俊[1] 郑欣 李寒煜 郭新良 刘荣海 WANG Qian;XU Peijun;ZHENG Xin;LI Hanyu;GUO Xinliang;LIU Ronghai(School of Materials Science and Engineering,Chang an University,Xi an 710064,China;Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China)

机构地区：[1]长安大学材料科学与工程学院,陕西西安710064 [2]云南电网有限责任公司电力科学研究院,云南昆明650217

出　　处：《塑料工业》2023年第10期160-166,172,共8页China Plastics Industry

基　　金：国家自然科学基金面上项目(51978072);长安大学中央高校基本科研业务费专项资助(300102312404)。

摘　　要：采用超声辅助液相剥离法成功制备了羟基化氮化硼纳米片(BNNS),并与聚醚多元醇(PMPO)分子链原位结合,制备了阻燃硬质聚氨酯泡沫/氮化硼纳米导热复合材料。结果显示,该方法制备的BNNS片层薄且表面含有较多官能团。相比未剥离的h-BN,羟基化BNNS改善了聚氨酯泡沫的微观孔隙结构。随着BNNS含量增加,复合材料的压缩强度先升高后逐渐降低。在0.5%~1%范围内,复合材料表现出最佳的热稳定性和协同阻燃性能。当BNNS含量为1.5%时,RPUF/BNNS复合材料的热导率提高了186.2%,达到0.063 W/(m·K)。Hydroxyl-functionalized boron nitride nanosheets(BNNS)were successfully prepared using ultrasound-assisted liquid-phase exfoliation,and they were in-situ combined with polyether polyol(PMPO)molecular chains to fabricate flame-retardant rigid polyurethane foam/boron nitride nanosheet thermal conductive composite materials.The results show that the prepared BNNS has thin layers and a high density of functional groups on the surface.Comparing to unexfoliated h-BN,hydroxyl-functionalized BNNS improves the micro-porous structure of polyurethane foam.The compressive strength of the composite material initially increases and then gradually decreases with increasing BNNS contents.Within the range from 0.5%to 1%,the composite material exhibits optimal thermal stability and synergistic flame-retardant performance.When the BNNS content is 1.5%,the thermal conductivity of the RPUF/BNNS composite material increases by 186.2%to 0.063 W/(m·K).

关 键 词：超声辅助液相剥离法 导热复合材料 聚氨酯泡沫 羟基化氮化硼纳米片 热导率 协效阻燃 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]