摘要
以慈竹为研究对象,对常压下乙酸脱除天然竹纤维中的木质素进行了探讨。以反应温度、乙酸体积分数、催化剂硫酸体积分数和反应时间为单因子,考察这些因素对天然竹纤维木质素脱除率的影响。结果表明:影响因素从大到小依次为反应温度、催化剂硫酸体积分数、乙酸体积分数和反应时间。正交试验结果表明,乙酸在脱除天然竹纤维木质素的过程中也脱除了部分半纤维素和纤维素。结合木质素脱除率、半纤维脱除率和纤维素脱除率,得到了最佳工艺条件,即90℃,乙酸体积分数88%,硫酸体积分数0.3%,反应时间3 h,在该条件下木质素的脱除率达到55.84%。
Based on Sinocalamus affinis, this thesis conducts a study on removing lignin in natural bamboo fibers under atmosphere pressure by acetic acid. First, it studies reaction temperature, volume fraction of acetic acid, volume fraction of sulfuric acid catalyst and reaction time as single factors to find their respective impact on removing lignin of original bamboo fibers. The results show that their influence degrees rank in a decreasing order, i.e., reaction temperature, volume fraction of sulfuric acid catalyst, volume fraction of acetic acid and reaction time. Next, it does an orthogonal experiment, whose results display that some hemicelluloses and celluloses are removed when acetic acid removes lignin in natural bamboo fibers. In consideration of the removal rates of lignin, hemicellulose and cellulose, the optimal operating conditions are obtained, that is, reaction temperature is 90 ℃, the volume fraction of acetic acid is 88 %, the volume fraction of sulfuric acid is 0.3 %, and the reaction time is 3 hours. Under the conditions, the removal rate of lignin can be 55.84 %.
出处
《丝绸》
CAS
北大核心
2012年第7期1-5,共5页
Journal of Silk
基金
教育部第39批留学基金项目(教外司留[2010]1174号)
教育部春晖计划项目(教外司留[2012]600号)
重庆市自然科学基金项目(CSTC
2008BB0008)
关键词
天然竹纤维
乙酸
木质素
脱除率
Bamboo fibers
Acetic acid
Lignin
Removal rate
作者简介
张袁松（1971-），男，副教授，主要从事新型纤维材料与功能纺织品的研究与教学。
