气凝胶
材料科学
可燃性
阻燃剂
保温
抗压强度
烟雾
聚乙烯醇
化学工程
复合材料
化学
有机化学
工程类
图层(电子)
作者
Jie Yang,Ao Zhang,Yuxin Chen,Linsheng Wang,Meixian Li,Hongyu Yang,Yanbei Hou
标识
DOI:10.1016/j.cej.2021.132809
摘要
Biomass materials are considered to be excellent candidates to replace petroleum-based materials, but inherent flammability limits their applications. In this work, biomass aerogel (BA) was prepared by freeze-drying method from sodium alginate (SA) and polyvinyl alcohol (PVA). To improve fire safety of BAs, a core–shell structured [email protected] coordination compound was successfully synthesized, which was surface functionalized by 3,5-diamino-1,2,4-triazole and 9,10-dihydro-9-oxo-10-phospho-diphenyl-10-oxide (DOPO), named as DOPO-NH2-ZIF-67. The addition of DOPO-NH2-ZIF-67 (2 wt%) outstandingly improved fire safety of BA, in contrast to neat BA, peak heat release rate, peak smoke production rate, and total smoke production were reduced by 66.6%, 85.10%, and 72.76%, respectively. Furthermore, the incorporation of ZIF-67 and its derivatives has no adverse effect on the thermal insulation performance of BA composites and significantly improved their compressive strength from 0.27 MPa to 1.76 MPa. Preparation of core–shell structured ZIFs rich in active groups furnishes a conceivable way to synthesize an effective flame retardant, and a prospective method for the fabrication of aerogel insulation materials with green and economical additive-free technology is proposed.
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