文献类型：期刊文献

英文题名：Superheated steam treatment: An eco-friendly approach for enhancing dimensional stability and mold resistance of bamboo via cellular structures regulation and hemicelluloses degradation

作者：Xiang, Elin[1] Li, Zhu[1] Zhao, Junqi[2] Jin, Xiaobei[3] Zhou, Fan[1] Lin, Lanying[1] Zhou, Yongdong[1]

第一作者：Xiang, Elin

通信作者：Zhou, YD[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Beijing New Bldg Mat Publ Ltd Co, Beijing 102209, Peoples R China;[3]Int Ctr Bamboo & Rattan, Key Lab Natl Forestry & Grassland Adm Bamboo & Ra, Beijing 100102, Peoples R China

年份：2025

卷号：330

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20254119288744);Scopus(收录号：2-s2.0-105017847066);WOS:【SCI-EXPANDED(收录号:WOS:001592827300001)】；

基金：This work was supported by the National Key Research and Devel-opment Program of China (2023YFD2200502) .

语种：英文

外文关键词：Bamboo; Superheated steam treatment; Steam pressure; Dimensional stability; Mold resistance; Hemicelluloses

摘要：Bamboo is regarded as a renewable material in modern architecture and interior decoration, however, the susceptibility to mold deterioration and moisture-induced deformation limits its industrial applications. To address these challenges, this study proposed a feasible and eco-friendly method for thermally modifying bamboo via superheated steam without the addition of any chemicals. This modification process emphasized the application of heat-moisture coupling to alter the chemical composition and cellular structures of bamboo. Compared to the natural bamboo (NB), superheated steam treated bamboo (SHT-B) exhibited a 3.45 % increase in porosity, along with the separation and buckling of wall layers within parenchyma cells, and the thermal degradation of starch granules. The heat-moisture coupling facilitated the degradation of hemicelluloses in bamboo, leading to a higher relative content of lignin, increased crystallinity, thicker crystallite thickness, and a reduced proportion of intramolecular hydrogen bonds. Consequently, SHT-B demonstrated reductions in equilibrium moisture content (EMC), thickness swelling rate, and volume swelling rate by 8.80 %, 66.39 %, and 70.69 %, respectively, indicating enhanced dimensional stability. Additionally, SHT-B displayed a deepening of surface color and an increased mass loss rate, accompanied by a slight reduction in density and modulus of rupture (MOR). Moreover, SHT-B exhibited exceptional mold resistance to Aspergillus niger and Botryodiplodia theobromae over 30 days. Overall, superheated steam treatment is anticipated to emerge as a feasible and clean method for the enhancement of bamboo's functional performances, with broad application prospects in the future.