• 文献标题:   Flame-retardant cellulose nanofiber aerogel modified with graphene oxide and sodium montmorillonite and its fire-alarm application
  • 文献类型:   Article
  • 作  者:   ZUO BY, YUAN BH
  • 作者关键词:   cellulose nanofiber aerogel, firewarning response, flame resistance, graphene oxide
  • 出版物名称:   POLYMERS FOR ADVANCED TECHNOLOGIES
  • ISSN:   1042-7147 EI 1099-1581
  • 通讯作者地址:  
  • 被引频次:   21
  • DOI:   10.1002/pat.5231 EA FEB 2021
  • 出版年:   2021

▎ 摘  要

Thermal insulation materials (TIMs) are widely used to realize energy conservation in buildings, but most of the commonly used organic TIMs are flammable. A novel biomass-based aerogel is produced by an environmentally friendly vacuum freeze-drying method, and a facile approach is proposed to improve the flame-retardant performance of cellulose nanofiber (CNF) aerogels by modifying them with graphene oxide (GO) and montmorillonite (MMT). GO and MMT form a barrier that blocks the contact between the composite aerogel and the external oxygen, achieving the flame-retardation effect. Notably, based on the high-temperature thermal reduction characteristic of GO, a fire-alarm system that can provide an ultrasensitive and reliable fire-warning signal is designed. A fire alarm of CNF-MMT-GO-50% can be triggered in approximately 1.9 seconds and lasts for more than 137.0 seconds when the aerogels are attacked by fire. This work helps to develop advanced TIMs to solve the shortcomings of traditional organic insulation materials and supplies a newfangled idea for the design of fire-alarm sensors, showing promising applications in building insulation, firefighting, and chemical industry.