碱处理对麦秸纤维增强水泥板力学性能的影响  

Effects of alkaline treatment on mechanical properties of straw fiber-reinforced cement board

作　　者：凌启飞[1] 郑霞[1] 李新功[1] 

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《中南林业科技大学学报》2012年第1期157-160,共4页Journal of Central South University of Forestry & Technology

基　　金：国家"十二五"科技计划课题(2012BAD24B03);国家林业公益性行业科研重大专项(2012040704);湖南省科技厅科技计划项目(2010NK3034);中南林业科技大学青年基金项目(101-0833);中南林业科技大学木材科学与技术国家重点学科资助项目

摘　　要：采用半干法工艺制备了麦秸纤维增强水泥板,探讨了碱处理对板材力学性能的影响。结果表明:1%碱处理纤维后板材的力学性能得到了明显改善。通过碱处理麦秸纤维中的半纤维素被水解溶出,避免了在水泥水化环境中麦秸纤维半纤维素水解成单糖而阻碍水泥水化凝固。麦秸纤维表面变得粗糙,增大了水泥与纤维的机械交织力,从而提高了板材的力学性能。同时,碱处理后的纤维拉伸强度和长径比的增大也改善了板材力学性能。Straw fiber-reinforced cement board made from straw fiber and cement was prepared by semi-dry processing technology to investigate the effects of alkali treatment on the mechanical properties of the board. The results indicate that the board fibers were treated with 1% alkali solution showed obvious improvements in mechanical properties. After alkali treatment, hemi-celluloses of straw fiber were hydrolyzed and dissolved, which avoided hemi-ceUuloses hydrolyzing into monosaccharide to hinder the solidifying of cement.The fibers surface became rough, which increased the mechanical interweaving force between cement and fibers. Thereby the board＇s mechanical properties were improved. At the same time, the increase of tensile strength and aspect ratio of the fibers improved the mechanical properties.

关 键 词：麦秸纤维增强水泥板 麦秸纤维 碱处理:力学性能 

分 类 号：S784[农业科学—林学]