摘要
采用硫酸水解法制备了纳米纤维素,并运用响应面分析法原理,对影响纳米纤维素得率的3个主要影响因素即硫酸质量分数、温度和时间进行优化。利用Design-Expert软件的Box-Benhnken(BBD)模式建立试验数学模型,并对各因素及其相互之间的交互作用进行了分析。结果表明,回归得到的二次多项式模型极显著,模型校正决定系数为98.43%,相关系数为99.31%。硫酸质量分数与温度、硫酸质量分数与时间及温度与时间对纳米纤维素得率的交互作用显著。通过工艺条件优化得出最佳工艺条件为:硫酸质量分数为54%,温度为52℃,时间为125 min,纳米纤维素的得率为69.31%,与理论预测值(69.27%)较好吻合,表明模型是合理有效的。
Nanocellulose crystal was prepared by sulfuric acid hydrolysis. The effects of sulfuric acid mass fraction, temperature and time on the yield of nanocellulose crystal were optimized with response surface methodology. The mathematical model was established using the Design-Expert software. The effect of various factors and their interactions were analyzed as well. The results showed that quadratic model was the best model to describe the relationship between the yield of nanoeellulose crystal and the factors. The determination coefficient and adjusted determination coefficient were 99.31% and 98.43 %, respectively. The interactions between sulfuric acid concentration and temperature, sulfuric acid concentration and time, temperature and time were significant. When sulfuric acid concentration, temperature and time corresponded to 54 % , 52 ℃ and 125 min, the yield of nanocellulose crystal would reach 69.31%. It is the highest value in this investigation.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2011年第6期61-65,共5页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(30972312
31170520)
福建省自然科学基金(2010J01270)
关键词
纳米纤维素
酸水解
响应面分析法
nanocellulose crystal
acid hydrolysis
response surface methodology
