A flame retardant fabric nanocoating based on nanocarbon black particles@polymer composite and its fire-alarm application

• DOI: 10.1016/j.cej.2021.133501
• Publication Date: 2021-11-10T02:20:26Z
• Authors: Long Xia; Yan Lv; Zhongxi Miao; Lili Luo; Weiang Luo; Yiting Xu; Conghui Yuan; Birong Zeng; Lizong Dai
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract Facile fabrication of fire-warning sensors with low-cost and high-strength has always been a considerable challenge for materials scientists. Herein, carbon black (CB) nanoparticles with core-shell structure (denoted as CB@KF) were prepared by in-situ polymerization. And a novel fire-warning sensor (denoted as CB@KF-CF) with temperature sensing, fire-warning, flexibility and high strength was fabricated by coating a flame retardant coating, which consists of PVA, CB@KF, and carbon nanotubes (CNT) on cotton fabric. Benefiting from the flame retardancy and carbonization performance of CB@KF, CB@KF-CF possessed much better flame retardancy and fire-warning properties. Especially, CB@KF-CF exhibited a shorter alarm time to abnormal high temperature (350 oC) and fire, which can warn at 8 s and 4 s respectively. Meanwhile, the char length of CB@KF-CF was 7.8 cm after the vertical flame test (VFT) and the total heat release rate (THR) of CB@KF-CF was also reduced by more than 50%. Ultimately, the formation mechanism of the dense char layer and the conductive paths were also illustrated. These results show that the preparation of fire-warning sensor described in this paper has broad application prospects.