文献类型：期刊文献

英文题名：Facile Strategy for Building an Organic-Inorganic Dual Network for Improving the Mechanical Properties and Flame Retardancy of Eucalyptus Laminated Veneer Lumber

作者：Shan, Junyue[1,2,3] Yang, Chan[1,4] Cao, Lijun[3] Liu, Guoying[3] Zhang, Yahui[2] Zhang, Fangda[2] Liu, Mengyao[3] Tan, Haiyan[3] Zhang, Yanhua[3] Lin, Qiuqin[2] Yu, Wenji[1,2]

第一作者：Shan, Junyue

机构：[1] College of Mechanical and Electrical Engineering, Northeast Forestry University, Ministry of Education, Harbin, 150040, China; [2] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 10091, China; [3] College of Materials Science and Engineering, Northeast Forestry University, Ministry of Education, Harbin, 150040, China; [4] Dynea [Guangdong] Co., Ltd, Guangdong, Gaoyao City, 526105, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240135771)

语种：英文

外文关键词：Adhesives - Fire resistance - Heat transfer - Hot pressing - Laminating - Lumber - Magnesium compounds - Resins - Thermal insulation - Veneers

摘要：Laminated veneer lumber (LVL) is widely used in architectural decoration and structure, but its low mechanical properties and flammability limit its application due to the poor quality of raw eucalyptus wood. Herein, we propose a dual-network strategy to modify wood veneer by constructing an organic-inorganic network of phenol-formaldehyde (PF) resin. The PF resin was modified by Mg(OH)2@nano-silica particles first, and the modified resin was used to prepare LVL by impregnation and hot pressing. The flexural strength, elastic modulus, and wet shear strength of LVL prepared from the modified wood increased to 115.6 MPa, 9.7 GPa, and 2.1 MPa respectively, which indicate increase of 86.1, 47.0, and 90.9%, respectively, compared with the control group. The peak heat release rate was reduced by 15.3%, and the ignition time was increased to 26 s. The uniform inorganic network effectively mitigates stress concentration and enhances adhesive strength, while the dual-network structure provides a continuous thermal insulation layer that inhibits heat transfer. The strategy for the preparation of dual networks on wood veneer proposed in this study has simple steps and highly improves performance on the LVL, broadening the applications of eucalyptus in construction and outdoor fields. ? 2024, The Authors. All rights reserved.