本文二维码信息
二维码(扫一下试试看!)
纤维素高值化利用制备微晶纤维素
High Value-added Utilization of Cellulose: Microcrystalline Cellulose Preparation
收稿日期:  
DOI:10.11980/j.issn.0254-508X.2014.05.005
关键词:  微晶纤维素  Fe3+  选择性酸水解  还原糖
Key Words:microcrystalline cellulose  Fe3+  selective acid hydrolysis  reducing sugar
基金项目:教育部高校博士点专项基金(20126125130001);陕西科技大学博士启动基金(BJ13-02)资助;陕西科技大学创新基金资助项。
作者单位
张向荣 陕西科技大学轻工与能源学院 陕西科技大学教育部轻化工助剂化学与技术重点实验室陕西西安710021 
张美云 陕西科技大学轻工与能源学院 陕西科技大学教育部轻化工助剂化学与技术重点实验室陕西西安710021 
李金宝 陕西科技大学轻工与能源学院 陕西科技大学教育部轻化工助剂化学与技术重点实验室陕西西安710021 
贺 行 陕西科技大学轻工与能源学院 陕西科技大学教育部轻化工助剂化学与技术重点实验室陕西西安710021 
摘要点击次数: 2558
全文下载次数: 531
摘要:以溶解浆为原料,通过Fe3+作为催化剂酸水解、分离、纯化制备微晶纤维素(MCC)粗产品。确定最优的稀酸水解浓度和Fe3+浓度,同时对水解残液成分进行初步分析。最终水解条件为,水解温度80℃,Fe3+浓度0.3 mol/L,水解时间60 min,HCl浓度2.0 mol/L。对制备的MCC分析与表征结果表明,MCC主要成分为纤维素,其晶型结构仍为纤维素Ⅰ型,结晶度为73.0%,与原料相比增加了18.2个百分点,聚合度下降至100左右;所得的MCC质均长度集中分布在200~400 μm之间;水解残液中还原糖得率为1.56%。
Abstract:Application of metal Fe3+ catalytic acid hydrolysis, separation and purification to prepare crude microcrystalline cellulose from dissolving pulp was introduced. The optimal dilute acid hydrolysis concentration and Fe3+ concentration were determined, and a preliminary analysis was carried out on the ingredients of hydrolysis residual liquid. The optimal hydrolysis parameters were: hydrolysis temperature 80℃, Fe3+ concentration 0.3 mol/L, hydrolysis time 60 min, and hydrochloric acid concentration 2.0 mol/L. The results showed that the main composition of MCC was cellulose with crystalline structure ofⅠtype, the crystallinity was 73.0%, which increased by 18.2 percentage points compared with raw material 54.8%,and the degree of polymerization reduced to around 100; and the weighted mean length of MCC distribution was between 200~400 μm; the yield of reducing sugar in the hydrolysis residual liquid was 1.56%.
查看全文  查看/发表评论  下载PDF阅读器