文献类型：期刊文献

英文题名：Sustainable, high-weather resistance, and low-temperature heat-treated outdoor bamboo fiber composite materials: Processing and chemical characterization

作者：Huang, Chengjian[1] Guo, Rencong[1] Bao, Yongjie[1] Li, Hui[3] Bao, Minzhen[1] Rao, Fei[4] Wu, Zaixing[1] Xue, Runbo[1,5] Li, Xiaoyan[1] An, Xin[2] Li, Neng[1]

第一作者：Huang, Chengjian

通信作者：An, X[1];Li, N[2]

机构：[1]Natl Forestry & Grassland Adm, Bamboo Home Engn Technol Res Ctr, Changsha, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[3]Hubei Acad Forestry, Wuhan 430075, Peoples R China;[4]Zhejiang Sci Tech Univ, Sch Art & Design, Hangzhou 310018, Peoples R China;[5]Cent South Univ Forestry & Technol, Changsha 410000, Peoples R China

年份：2026

卷号：506

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20255119754569);Scopus(收录号：2-s2.0-105025013740);WOS:【SCI-EXPANDED(收录号:WOS:001646265100001)】；

基金：We acknowledge financial support from the Fundamental Research Funds for the Central Nonprofit Research Institution of CAF (CAFYBB2025MA014; CAFYBB2024MA040) and the Zhejiang Provin-cial Natural Science Foundation of China (LQ23C160009; LTGN24C160001) .

语种：英文

外文关键词：Bamboo; Photodegradation; Chemical properties

摘要：Outdoor bamboo fiber composite materials (OBFMs) are widely used in structural and building applications due to their sustainability, high strength, and desirable texture. Low-temperature heat treatment of OBFMs enhances the material's surface properties and weather resistance while preserving its mechanical strength; however, the underlying chemical mechanisms remain unclear. This research endeavors to elucidate the evolution trends of chemical properties in low-temperature heat treated OBFMs subjected to photodegradation environments. X-ray diffractometer analysis, Fourier-transform infrared spectroscopy, scanning electron microscope-energy dispersive spectrometer, X-ray photoelectron spectroscopy, 13C nuclear magnetic resonance, and thermogravimetric analysis were employed to characterize crystallinity, functional groups, microstructures, surface elemental distributions, molecular bonding configurations, and thermal degradation profiles, respectively. Experimental results demonstrated that the OBFMs obtained through low-temperature heat treatment underwent a series of reactions, including water dehydration, significant depolymerization, and bond cleavage in hemicellulose and lignin. Multi-characterization revealed this treatment mainly degrades lignin's non-skeletal groups and modifies hemicellulose's groups, without damaging cellulose's crystalline region or lignin's aromatic skeleton, explaining mechanical strength preservation. Following 320 h of weathering, the lignin in OBFMs experienced a sequence of bond cleavage, crosslinking, photooxidation, and recombination processes. Notably, the oxygen content of OBFM-150 increased moderately, with an increment of 2.63 %. Additionally, the weathered OBFM-150 exhibited the lowest O/C ratio (0.36), the least variation in lignin functional group proportions, and the lowest C3 +C4 content (6.48 %). OBFM-150 effectively enhances the stability of its chemical structure, rendering it suitable for outdoor architectural and decorative applications.