碱处理精制合成革用麦草微晶纤维素  

Purification of Wheat Straw Microcrystalline Cellulose for Synthetic Leather by Alkaline Treatment

作　　者：李金宝[1,2] 张向荣[1] 张美云[1] 贺行[1,2] 

机构地区：[1]陕西科技大学轻工与能源学院陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021 [2]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《纸和造纸》2014年第1期8-12,共5页Paper and Paper Making

基　　金：教育部高校博士点专项基金(20126125130001);制浆造纸工程国家重点实验室开放基金(201215);陕西科技大学博士启动基金(BJ13-02);陕西科技大学创新基金资助项目

摘　　要：以自制漂白麦草水解纤维素为原料,通过碱处理除硅的方式降低麦草微晶纤维素中灰分含量以达到精制目的。采用扫描电镜-能谱联用(SEM-EDS)和X射线衍射仪(XRD)等技术手段对所制备的合成革用麦草微晶纤维素的结构性能和灰分含量进行了测定和表征。结果表明,碱处理精制麦草微晶纤维素的最佳工艺条件为:碱用量10%,温度80℃,处理时间30 min,水解纤维素浓度10%。碱处理后麦草微晶纤维素灰分中硅元素含量可由1.54%大幅降低至0.11%,最终产品质量符合国家林业局合成革用微晶纤维素行业标准。This study was undertaken to obtain purified microcrystaUine cellulose （MCC） from bleaching wheat straw hydrocellulose by means of alkaline treatment, aimed to reduce the ash content of wheat straw MCC and gained the high-purity products.The structural performance and ash content of straw wheat MCC for synthetic leather were investigated by SEM-EDS, XRD and other techniques. The results showed that the optimum conditions of alkaline treatment were： alkali dosage 15%, temperature 80℃, 30 min duration of reaction and 10% of hydrocellulose concentration. At this point, the silicon in ash content of refined cellulose can be significantly reduced from 1.54% to 0.32%, and the quality indicators of products were in line with MCC for Synthetic Leather Forestry Industry Standards released by State Forestry Administration.

关 键 词：微晶纤维素 麦草秸秆 碱处理 灰分含量 

分 类 号：TS52[轻工技术与工程—皮革化学与工程]