文献类型：期刊文献

英文题名：Ultra-strong bamboo macrofibers via selective delignification and microwave drying for lightweight structural composites

作者：Sun, Qinglu[1] Ma, Hongxia[3] Zhang, Yahui[2] Hu, Yaru[1] Wang, Junqi[1] Qi, Yue[2] Wang, Ying[1] Yang, Guihua[1] He, Ming[1]

第一作者：Sun, Qinglu

通信作者：Wang, Y[1];He, M[1];Zhang, YH[2]

机构：[1]Qilu Univ Technol, Shandong Acad Sci, State Key Lab Green Papermaking & Resource Recycli, Jinan 250353, Shandong, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[3]Guangdong Acad Forestry, Guangzhou 510520, Peoples R China

年份：2025

卷号：236

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20254019279161);Scopus(收录号：2-s2.0-105017682422);WOS:【SCI-EXPANDED(收录号:WOS:001591481900001)】；

基金：This work was supported by the Guangdong Provincial Key Labora-tory of Silviculture, Protection and Utilization "Development of High Performance Functional Materials Based on Bamboo Structure-Recon-stitution" (No. SPU 2024-07) the Shandong Provincial Natural Science Foundation (No. ZR2024MC189, No. ZR2022QE109) , the Jinan Science and Technology Bureau project (No.20233046) , the Program of China Scholarship Council (Grant No. 202408370137) , Shandong Province Higher Education Youth Innovation and Technology Support Program (2024KJH047) , Major Scientific Research Project for the Construction of State Key Lab (No. 2025ZDGZ02) and Science, Education and Industry Innovation Pilot Project (2024ZDZX01) .

语种：英文

外文关键词：Bamboo; Natural Fiber; Microwave Drying; Lightweight; Structural Composites

摘要：Natural fibers offer a sustainable alternative to synthetic reinforcements, but their mechanical properties often lag behind those of synthetic fibers. Herein, we report a novel strategy combining selective delignification and microwave-assisted drying to fabricate ultra-strong bamboo macrofibers for lightweight structural composites. Selective delignification removes lignin from bamboo while retaining the cellulose framework. Subsequent rapid microwave drying induced a dense alignment of the cellulose protofibrils, which not only shortened the drying time (24 h to 1 h) but also greatly increased the fiber strength. The resulting bamboo crude fibers exhibit excellent mechanical properties (tensile strength of 1148 +/- 52 MPa. Due to their low density, these fibers have a very high specific strength (7.2092 x 106 N center dot m center dot kg-1), even exceeding some carbon and glass fibers, making them ideal for lightweight structures. When used to reinforce polymer composites, bamboo can significantly improve the mechanical properties of the material while adding minimal weight. The MD-fiber@PVA composites exhibited a 267 % increase in ultimate stress, rising from 27.32 MPa (neat PVA) to 100.32 MPa, whereas the ADfiber@PVA composites achieved a 193 % improvement. Due to the lower density of the large fibers, the specific strength reaches 0.110 x 106 N m kg-1 for MD-fiber@PVA and 0.087 x 106 N m kg-1 for AD-fiber@PVA. Moreover, the use of fast-growing bamboo and energy-efficient microwave processing underscores the environmental and economic viability of this bio-based fabrication approach. It offers a green manufacturing route for high-performance fiber materials and aligns with sustainability goals by reducing reliance on petrochemical fibers and lowering carbon footprints.