Study on the Wood Cellulose Fibers Treated with Periodate
The wood cellulose fibers were oxidized by periodate to obtain dialdehyde cellulose(DAC)fibers,in which the 1,2-glycol groups were converted into two aldehyde groups.The aldehyde groups content,degrees of crystallinity and polymerization of treated fibers were characterized.Moreover,the mechanical properties of DAC fibers were analyzed,the dry and rewet tensile indices,elongation rate and TEA of tested sheets were improved greatly in comparison with the sheets made of original cellulose fibers.The improvements were mainly attributed to hemi-acetal groups formed between the aldehyde groups of DAC fibers and the hydroxyl groups of fibers,and the results showed that the mechanical strength of DAC fibers increased with the aldehyde content.SEM topographical images of the test sheets revealed special surface features that validated the observed increase in bonding strength of the test sheets made of DAC fibers.All these results indicated that both mechanical properties and chemical activation of DAC fibers were valuable,and it can be utilized as a precursor for many potential products.
cellulose fibers periodate oxidation aldehyde groups tensile index hemiacetal groups
WEI LIU QINGXI HOU ZEHUA LIU LIANGLIANG BAI
Tianjin Key Laboratory of Pulp & Paper,Tianjin University of Science & Technology,Tianjin 300457,China
国际会议
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
天津
英文
246-249
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）