文献类型：期刊文献

英文题名：In-situ incorporation of metal phytates for green and highly efficient flame-retardant wood with excellent smoke-suppression property

作者：Zhang, Shaodi[1] Wang, Xuan[1] Ding, Mengyi[1] Huang, Yuxiang[2] Li, Li[1] Wang, Mingzhi[1]

第一作者：Zhang, Shaodi

通信作者：Wang, MZ[1]

机构：[1]Beijing Forestry Univ, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2022

卷号：187

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20222812356123);Scopus(收录号：2-s2.0-85133884173);WOS:【SCI-EXPANDED(收录号:WOS:000853707100003)】；

基金：The study was financially supported by the Fundamental Research Funds for the Central Universities in China (No. 2019JQ03013).

语种：英文

外文关键词：Wood; Metal phytate; Smoke-suppression; Dual-charring effect; Catalytic graphitization

摘要：Phytic acid (PA) have attracted rapidly growing attention as a bio-based and effective flame retardant for cellulosic materials. However, they produce much toxic smoke during the combustion, which severely threats human life. To address this problem, in this work, metal phytates were in-situ incorporated into the wood matrix via a simple two-step approach to fabricate green and highly efficient flame-retardant wood (PM-W, M = Cu, Fe, Zn, and Mg) with excellent smoke-suppression property. PCu-W exhibits 44.77 % and 91.98 % smaller total heat release and total smoke production than W, respectively, with a weight percent gain of only 13.06 %, outperforming most of its previous counterparts. The improvements can be mainly ascribed to the significant dualcharring effect of metal phytates, and the catalytic graphitizing effect of metallic species on the char residue. The high-quality char layer act as an efficient isolating barrier to restrict the emission of smoke. Moreover, PCu-W shows superior performances to other PM-Ws owing not only to the stronger Lewis acidity of Cu2+, but also to the lower nitrogen solubility of metallic Cu, which increased the nitrogen content in the graphitic structure and accordingly enhanced the stability of the char. This work provides guidelines for designing green and safer strategy to address the fire hazard of wood or other cellulosic materials by PA-derived flame retardants.