文献类型：期刊文献

英文题名：Intumescent flame-retardant wood: In situ polymerization of ionic liquids and its mechanism

作者：Jiang, Jinrui[1] Wu, Yuzhang[1] Luo, Jiaming[1] Qu, Wei[1]

第一作者：Jiang, Jinrui

通信作者：Wu, YZ[1];Qu, W[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Xiangshan Rd, Beijing 100091, Peoples R China

年份：2025

卷号：517

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20252318548347);Scopus(收录号：2-s2.0-105007159444);WOS:【SCI-EXPANDED(收录号:WOS:001513354500005)】；

基金：This research was supported by Fundamental Research Funds of CAF (CAFYBB2023PA004) and National Natural Science Foundation of China (No. 31890772) .

语种：英文

外文关键词：Poly(ionic liquid)s; In-situ polymerization; Wood cell wall; Flame-retardant mechanism

摘要：Wood, a ubiquitous material in furniture and construction, is limited by its natural flammability. Existing wood flame retardant technologies are often ineffective and lack environmental sustainability. Ionic liquids (ILs), known for their non-flammability and non-volatility, offer a green solvent solution to these challenges. In this study, we synthesized a novel phosphorus-containing, polymerizable IL. The IL was impregnated into the wood and polymerized in situ, yielding PIL-modified wood (PIL-wood). Raman spectroscopy and SEM confirmed the IL's in-situ polymerization in the wood and its effect on swelling the cell walls. Notably, wood treated with 30 % PIL (IL30W) showed a 74.2 % decrease in total heat release (THR) compared to untreated wood (UW). The condensed-phase flame retardant mechanism analysis reveals that PIL-wood expands during heating, transitioning into wood foam with a linear expansion growth rate of up to 84 %. This macroscopically manifests as an increase in wood pores, improving thermal and oxygen insulation, and thus enhancing flame retardancy. This represents a plastification intumescent flame-retardant mechanism, and the observed changes in PIL-wood upon heating could offer new insights for developing novel wood-based functional materials.