摘要
采用酸性染料酸性橙Ⅱ对经壳聚糖处理的毛白杨原木木粉、苯醇抽提木粉以及木材主要组分进行染色 ,并用等物质的量的强碱、弱碱、强酸、弱酸以及水和有机溶剂处理相同质量经壳聚糖处理的原木木粉与壳聚糖染色试样 ,测定其助染效果和确定其助染机理。结果表明 :壳聚糖处理能显著提高酸性染料对毛白杨原木木粉、苯醇抽提木粉、纤维素、半纤维素和木质素的上染率 ,其助染机理是与木材组分结合的壳聚糖分子的氨基与酸性染料上的磺酸基以离子键结合 ,形成磺酸盐 ,从而提高了上染率。
Chitosan, an natural and renewable polymer without toxic and pollution to human beings and environment and the deacetylated derivative of chitin that mainly contain in the crusts of crabs and shrimps, has many good characteristics and used into many fields such as agriculture, medicine, chemistry, etc.. In order to study the mechanism of modification of wood dyeing as dyestuff carrier for fixation, the main wood constituent of Populus tomentosa sapwood pretreated with chitosan and then dyed by acid orange Ⅱ. Degree of dyeing(DD) of main wood constituent and type of chemical linkage between wood and chitosan were determined. The results showed that the degree of dyeing of wood meal, wood meal extracted by benzene-ethanol solution, holecellulose, cellulose, hemicellulose and lignin of P. tomentosa which were dyed by acid dyestuff were significantly increased after pretreated with chitosan. And amino of chitosan bonded with wood components formed ionic bond with sulfonic group under acid condition, which produced sulphonate. So chitosan fixes the dyestuff and improve the dyeing effects as a kind of dyestuff carrier for wood dyeing.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2003年第6期126-130,共5页
Scientia Silvae Sinicae
基金
国家自然科学青年基金资助项目 ( 3 970 0 113 )
