文献类型：期刊文献

英文题名：Fabrication and characterization of flexible natural cellulosic fiber composites through collaborative modification strategy of sodium hydroxide and γ-Aminopropyl triethoxysilane

作者：Zhang, Lei[1] Zhang, Jie[1] Lv, Chao[1] Gao, Li[1] Luo, Shupin[1] Ren, Yiping[1] Chang, Liang[1] Chen, Xueqi[1] Tang, Qiheng[1] Guo, Wenjing[1]

通信作者：Tang, QH[1]

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

年份：2024

卷号：261

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20240615509665);Scopus(收录号：2-s2.0-85184036693);WOS:【SCI-EXPANDED(收录号:WOS:001175748000001)】；

基金：The authors acknowledge the financial support provided by the National Key Research and Development Program (2021YFD2200604, 2023YFD2201404) and the generous donation of poplar fiber from Ningfeng Group Co., Ltd.

语种：英文

外文关键词：Flexibility; Mechanical properties; Cellulosic fibers/polyurethane composites

摘要：The primary purpose of this work is to study the fabrication of a flexible natural cellulosic fiber composite. In this respect, natural cellulosic fiber was obtained by modified poplar wood fiber through sodium hydroxide (NaOH) and gamma-Aminopropyl Triethoxysilan. Then, the composites were fabricated by hot-pressing the modified wood fibers and polyurethane following characterization. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM) observation results confirmed that some of the hemicellulose and lignin were removed from wood fibers after NaOH modification and successfully grafted with alkoxy structures after KH550 modification. NaOH&KH550 modification improved the interfacial compatibility between poplar wood fibers and polyurethane. The flexibility of the composites was improved (the slenderness value was reduced by 113 %), allowing flexible deformations such as bending, twisting, and knotting. In addition, thermal stability, tensile strength (increased by 105 %), elongation at the break (increased by 125 %), and water resistance were increased. This flexible natural cellulosic fiber composite is expected to be applied in the veneering of curved materials and special-shaped structure furniture, providing a theoretical basis for improving the added value of wood-based composites.