Study on the Effect of Two-Step Saturated Steam Heat Treatment Process on the Properties of Reconstituted Bamboo  

作　　者：Xin Han Zhichao Lou Chenglong Yuan Xinwu Wu Jie Liu Fujin Weng Yanjun Li 

机构地区：[1]Jiangsu Co-Innovaton Center of Eficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing,China [2]Zhejiang Academy of Forestry Sciences,Hangzhou,China [3]Key Laboratory of National Forestry and Grassland Admini stration/Beijng for Bamboo&Rattan Science and Technology,Beiing,China [4]College of Materials Science and Engineering,Nanjing Forestry University,Nanjing,China

出　　处：《Journal of Renewable Materials》2022年第12期3313-3334,共22页可再生材料杂志（英文）

基　　金：This research was funded by Financial support fom the National Natural Science Foundation of China(No.31971740);Key University Science Research Project of Jiangsu Province(17KJA220004);Jiangsu Agricultural Science and Technology Independent Innovation Fund(CX(20)3041);Science and Technology Program of Fujian Province(2019N3014);Open Fund of Key Laboratory of National Forestry and Grassland Admini stration/Beijing for Bamboo&Rattan Science and Technology(ICBR-2020-08).

摘　　要：With the aim of utilizing reconstituted bamboo as a carbon cycle oriented material,the improvement of physical and mechanical properties has been actively studied to solve using problems The saturated steam heat treatment process has been widely used in worldwide.With the development and exploration of this technology,two step satu-rated steam heat treatment process appears in some practical production,that is,affer a period of saturated steam heat treatment at a lower temperature,the bamboo bundles are taken out and seasoned for a period of time,and then put back into the heat tank again,and heated at a higher temperature for another period of time.During the two-step saturated steam heat treatment,the physical and mechanical properties of bamboo changed.However,the mechanism of two step saturated steam heat treatment has not been thoroughly discussed.For purpose that this paper all discuss and find out the mechanism of two step saturated steam heat treatment on the change of physical and mechanical properties of reconstituted bamboo.In this work,the one and two step saturated steam heat treat-ments were carried out according to the actual production parameters,and the physical and mechanical properties of the reconstituted bamboo board made of treated bamboo bundles were analyzed,including the color change,the thickness swelling(TS),modulus of elasticity(MOE),modulus of rupture(MOR)and shear strength.The results indicate that two-step saturated steam heat treatment is better than one step.Based on the detailed study of the chemical composition,crytalinity and micro morphologial characteristics of the heated bamboo bundles,it is further revealed that during two-step saturated steam heat treatment,oxygen air is added to the reaction system between the two heat treatment processes to further catalyze the oxidation of hemicellulose and enhance the crystal-linity of cellulose,so as to improve the properties of the final products.Our work has optimized the saturated steam heat treatment process which is widely used i

关 键 词：Modulus of elasticity modulus of rupture thickness swelling oxidation 

分 类 号：S795[农业科学—林木遗传育种] TB321[农业科学—林学]