芦苇浆纳米纤维素超声法制备工艺优化及表征  

Preparation Optimization and Characterization of Reed Pulp Nanocrystalline Cellulose with Ultrasonic Methods

作　　者：刘志明[1] 王海英[2] 孟围[2] 谢成[1] 

机构地区：[1]东北林业大学材料科学与工程学院,生物质材料科学与技术教育部重点实验室,黑龙江哈尔滨150040 [2]东北林业大学林学院,黑龙江哈尔滨150040

出　　处：《中国野生植物资源》2013年第2期15-19,共5页Chinese Wild Plant Resources

基　　金：中央高校基本科研业务费专项资金资助(DL11EB01);国家自然科学基金资助项目(31070633);人力资源和社会保障部留学回国人员科技活动择优资助项目(07041311401)

摘　　要：以芦苇浆为原料,采用超声辅助硫酸水解法制备了纳米纤维素。在单因素实验的基础上,响应面法优化纳米纤维素制备工艺条件,结果表明最佳制备工艺条件为超声时间32 min,硫酸浓度52%,反应温度54℃,纳米纤维素得率最高(78.67%);通过傅里叶变换红外(FTIR)、X射线衍射和透射电子显微镜(TEM)对最佳工艺条件制备的纳米纤维素进行性能表征,分析表明最佳工艺条件制备的纳米纤维素聚集态结构为纤维素Ⅰ型,呈棒状。Nanocrystalline cellulose （NCC） was prepared from reed pulp by the method of sulfuric acid hydrolysis with ultrasonic pretreatment. Based on the results of the single - factor experiment, the preparation condition of NCC was optimized via response surface methodology. The results show that the best conditions are 32 min of ultrasonic time, 52% of sulfuric acid concentration and 54~C of reaction temperature. Under these conditions, the yield of NCC was the highest （78.67%）. The NCC with optimized condition was characterized by using fourier transform infrared （FTIR） , X - ray diffraction and transmis- sion electron microscopy （ TEM）, and it is analyzed that the aggregation state structure of NCC with optimized condition was cellulose type I, which is rod -like morphology.

关 键 词：芦苇浆 纳米纤维素 超声化学处理 响应面法 形貌 

分 类 号：TQ353[化学工程]