文献类型：期刊文献

英文题名：Universal circulating impregnation method for the fabrication of durable flame-retardant plywood with low hygroscopicity and leaching resistance

作者：Lu, Jinhan[1] Huang, Yuxiang[1] Jiang, Peng[1] Chen, Zhilin[1] Bourbigot, Serge[2,3] Fontaine, Gaelle[2] Chang, Liang[1] Zhang, Longfei[1,4] Pan, Fangya[1]

第一作者：Lu, Jinhan

通信作者：Jiang, P[1]|[a000570cfea21705df7ed]姜鹏;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Xiangshan Rd, Beijing 100091, Peoples R China;[2]Univ Lille, Cent Lille Inst, UMR 8207, INRAE,UMET Unite Mat & Transformat,CNRS, F-59000 Lille, France;[3]Inst Univ France IUF, Paris, France;[4]Natl Forestry & Grassland Adm, Key Lab Plant Fiber Funct Mat, Fuzhou 350002, Fujian, Peoples R China

年份：2022

卷号：195

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20215111354319);Scopus(收录号：2-s2.0-85121236039);WOS:【SCI-EXPANDED(收录号:WOS:000763038200010)】；

基金：The authors wish to thank the National Forestry Public Welfare Industry Research Project (CAFYBB2021ZB004), the Open Fund Program (2019KFJJ13), and China Scholarship Council (CSC: 202003270033) for their financial contributions.

语种：英文

外文关键词：Durable; Wood structure; Ignition time; Graphitization; Phospho-carbonaceous structure

摘要：The low hygroscopic resistance of flame-retardant plywood prepared by impregnation decreases its durable flame retardancy and antifungal properties. In this study, we employed the circulating impregnation technology of veneer using 2 wt% melamine (MEL) solution, 15 wt% amino trimethylene phosphonic acid (AP) solution, and 2 wt% MEL solution again to prepare durable flame-retardant plywood via in situ synthesis of water-insoluble MEL amino trimethyl phosphate (MEL-AP) in wood structures. The presence of 11.2 wt% MEL-AP in plywood (MAM-PW) resulted in a V-0 rating in vertical burning (UL-94), a high limiting oxygen index of 36.2%, and a significant reduction in the peak-heat-release-rate (-35.7%) with a significantly longer ignition time compared with that of bare plywood. In addition, MAM-PW exhibited a lower moisture content (21%) and higher leaching resistance value (57%) than commercial flame-retardant-plywood (38% and 3%, respectively) after 7 days of testing. The MEL-AP deposits in wood micropores decomposed to polyphosphoric acids to facilitate the charring of wood under heat, leading to a smooth and bubble-shaped phospho-carbonaceous structure in the condensed phase. Simultaneously, inert gasses were released to dilute the flammable volatiles accompanied by wood decomposition in the gas phase. These results strongly suggest that circulating impregnation has great potential as a sustainable and efficient strategy to prepare fire-proofing plywood with excellent hygroscopic and leaching resistance. (C) 2021 Elsevier Ltd. All rights reserved.