文献类型：期刊文献

英文题名：Green synthesis of silane-assisted fluorescent carbon dots based on sanding dusts and its application in flame-retardant and anti-leaching wood materials

作者：Zhang, Longfei[1,2] Peng, Limin[1] Liang, Shanqing[1] Chen, Zhilin[1] Lyu, Shaoyi[1] Wang, Siqun[3]

第一作者：Zhang, Longfei;张龙飞

通信作者：Lyu, S[1];Wang, S[2]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing 210037, Peoples R China;[3]Univ Tennessee, Ctr Renewable Carbon, Knoxville, TN 37996 USA

年份：2024

卷号：446

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20240915657118);Scopus(收录号：2-s2.0-85186127954);WOS:【SCI-EXPANDED(收录号:WOS:001199289800001)】；

基金：This work is supported by the Fundamental Research Funds of CAF (CAFYBB2022MB001) and the National Natural Science Foundation of China (32001261) .

语种：英文

外文关键词：Carbon dots; Wood; Recycling sanding dusts; Fluorescence; Flame retardants

摘要：Novel silane-assisted flame-retardant carbon dots (FR-CDs) were synthesized via the hydrothermal carbonization strategy using recycled wood sanding dusts, tris(hydroxymethyl) phosphine oxide (THPO), phosphoric acid (PA), and amino-silane as precursors. The highly transparent FR-CDs suspension appears pale yellow color under daylight and exhibits a strong fluorescence response to light excitations, which helps to keep the original color of the wood and also has broad application prospects for monitoring the leaching behavior of FR-wood. The as-prepared FR-CDs can be applied in FR-wood materials using the facile dipping process owing to their tiny nanoparticles, uniform dispersion, and numerous nitrogen-phosphorus groups. In the flame test, the FR-CDs treated wood composites emitted little smoke initially and maintained primary carbon layer that did not catch fire for over 180 s. The flame-retardancy of the FR-wood materials was confirmed by the thermo-analysis, limiting oxygen index, exposure to a high heat flux (50 kW/cm(2)), and the propane blowtorch tests (similar to 600 degrees C). Moreover, the formation mechanism of the silane-assisted FR-CDs during hydrothermal process and the FR-wood materials with dipping method was proposed. This study provides a facile and efficient strategy for developing highly transparent and cheap flame retardants for the wood materials, which could expand the application of the wood sanding dusts and the silane-assisted carbon-based nanomaterials in the design of anti-leaching flame-retardant materials.