文献类型：期刊文献

中文题名：热处理对竹材结构与力学性能的影响

英文题名：Effect of Heat Treatment on Structure and Mechanical Properties of Bamboo

作者：文世涛[1] 徐茹婷[1] 孙康[1] 陆铜华[2] 魏任重[2] 卢辛成[1]

第一作者：文世涛

机构：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,国家林业和草原局林产化学工程重点实验室,林木生物质低碳高效利用国家工程研究中心,江苏省林业资源高效加工利用协同创新中心,江苏南京210042;[2]千年舟新材料科技集团股份有限公司,浙江杭州310000

年份：2024

卷号：58

期号：6

起止页码：53-59

中文期刊名：生物质化学工程

外文期刊名：Biomass Chemical Engineering

收录：CSTPCD

基金：浙江省省院合作林业科技项目(2022SY01)。

语种：中文

中文关键词：竹材;化学组成;结晶度;抗拉强度;抗弯强度

外文关键词：bamboo;chemical constituents;crystallinity;tensile strength;bending strength

分类号：TQ35

摘要：热处理工艺对竹材材性改良、提高耐腐蚀性具有重要意义。以新鲜竹材为原料,研究不同热处理温度对竹材表观色彩、化学组成、微结构及力学性能的影响,探究内在联系及影响作用。结果表明:竹材热处理过程中会发生热解反应,破坏竹材原有维管束结构,改变其化学组成。随热处理温度升高,竹材颜色加深,温度对竹青颜色的影响显著高于竹黄;竹材中半纤维素含量降低,250℃处理的竹材中含半纤维素最低(15.85%);木质素含量增加,250℃处理的竹材中含木质素最高(30.47%);结晶度先增加后降低,160℃处理的竹材中纤维素结晶度最高,为72.02%。竹材抗拉强度和抗弯强度随温度升高先增加后降低,160℃处理的竹材抗拉强度74.52 MPa,抗弯强度44.14 MPa,较原料分别提高25.60%和15.37%。相关性分析表明竹材抗拉强度和抗弯强度与其自身的半纤维素含量和纤维素结晶度呈正相关、与木质素含量呈负相关。
Heat treatment process was of great significance to improve the material properties and corrosion resistance of bamboo.Using fresh bamboo as raw material,the effects of different heat treatment temperatures on the apparent color,chemical composition,microstructure and mechanical properties of bamboo were studied,and the interconnections and influences were explored.The results showed that:the pyrolysis reaction was occurred during the heat treatment process of bamboo,destroying the original vascular structure of bamboo and changing its chemical composition.With the increase of heat treatment temperature,the color of bamboo was deepened,and the effect of temperature on the color of bamboo green was significantly higher than that of bamboo yellow.The hemicellulose content decreased,and the content of hemicellulose in bamboo treated at 250℃was the lowest(15.85%).The lignin content increased,and the lignin content in the bamboo treated at 250℃was the highest(30.47%).The crystallinity increased first and then decreased,and the crystallinity of cellulose in bamboo treated at 160℃was the highest,which was 72.02%.The bamboo tensile strength and flexural strength with the increasing temperature increased and then decreased with the increasing temperature,the tensile strength and flexural strength at the treatment of 160℃were 74.52 MPa and 44.14 MPa,which were 25.60%and 15.37%higher than those of the original bamboo.Correlation analysis showed that the tensile strength and flexural strength of bamboo were positively correlated with hemicellulose content and cellulose crystallinity,and negatively correlated with lignin content.