响应曲面法优化过氧甲酸提取竹子纤维素的工艺研究

摘要

The present study optimized the performic acid extraction of cellulose from bamboo by the combined use of single factor method and response surface method (RSM).In the extraction process,bamboo was oxidized with performic acid at a certain temperature for the removal of hemicelluloses and lignin.The influences of performic acid concentration,extraction temperature,reaction time,as well as interactions of each two of above three variables on the response values (i.e.,cellulose content extracted) were investigated.The results indicated that the celltlose content of extracted was affected in decreasing order by the following factors:reaction time ＞ extraction temperature ＞ performic acid concentration.Through response surface method,the process conditions for cellulose extraction were optimized as follows:temperature 35.78℃,reaction time 19.93 h and performic acid concentration 0.45 mol/L.Under these conditions,the yield of cellulose extracted from bamboo was 95.1％.%以竹子为原料,实验研究了通过过氧甲酸氧化降解木质素和半纤维素来提取纤维素的工艺条件,通过单因素实验,分别考察过氧甲酸浓度、温度、时间对竹子纤维素提取率的影响.在此基础上,应用响应曲面法分析过氧甲酸浓度、温度、时间及三者两两交互作用对响应值的影响,确定了竹子纤维素提取的最佳工艺参数.实验结果表明,各因素对纤维素含量影响的显著性表现为:时间＞温度＞过氧甲酸浓度;通过响应曲面法优化的最佳工艺条件为:温度35.78℃,时间19.93 h,过氧酸浓度0.45 mol/L,在此条件下的纤维素提取率为95.1％.