层状双氢氧化物原位生长ZIF-67纳米晶体用于阻燃环氧复合材料  

In situ growth of ZIF-67 nanocrystals on layered double hydroxides for flame⁃retardant epoxy composites

作　　者：宋昆朋 白伟 谢美娜 何吉宇[1] 杨荣杰[1] SONG Kunpeng;BAI Wei;XIE Meina;HE Jiyu;YANG Rongjie(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学材料学院,北京100081

出　　处：《中国塑料》2025年第4期31-36,共6页China Plastics

摘　　要：以钴层状双氢氧化物(Co-LDH)作为载体,原位构建了Co-LDH@ZIF-67复合结构,有效地改善了Co-LDH的低催化活性和低比表面积的缺陷。结果表明,与Co-LDH相比,Co-LDH@ZIF-67改性的环氧树脂(EP)复合材料在抑制热量、烟雾和有毒气体方面具有明显的优势。当Co-LDH@ZIF-67含量为2%(质量分数,下同)时,复合材料的LOI值由24.5%增加到28.2%。并且与纯EP相比,EP/Co-LDH@ZIF-67复合材料的热释放速率峰值、总热释放以及总烟释放分别降低35.1%、16.3%和15.8%。并且相对于Co-LDH具有更明显的阻燃和抑烟的能力。In this study,Co-LDH@ZIF-67 composite structure was constructed in situ using Co-LDH as a carrier,which effectively improves the defects of low catalytic activity and low specific surface area of Co-LDH.The flame retardancy tests showed that the Co-LDH@ZIF-67 modified epoxy(EP)composites had significant advantages in suppressing heat,smoke,and toxic gases compared to Co-LDH.Specifically,the LOI value of the composites increased from 24.5%to 28.2%when Co-LDH@ZIF-67 was added at 2 wt%.The peak heat release rate,the total heat release,and the total smoke release of the EP/Co-LDH@ZIF-67 composites were reduced by 35.1%,16.3%,and 15.8%,respectively,compared with pure EP.And it has more obvious flame retardant and smoke suppression ability compared with Co-LDH.

关 键 词：金属有机框架 层状双层氢氧化物 环氧树脂 阻燃性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]