碱处理芦苇浆纳米纤维素制备工艺条件优化  

Optimization of Preparation Technology of Alkali Pretreated Reed Pulp Nano-cellulose

作　　者：谢成[1,2] 刘志明[1,2] 吴鹏[1,2] 方桂珍[1,2] 赵煦[1,2] 

机构地区：[1]东北林业大学材料科学与工程学院 [2]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

出　　处：《林产化学与工业》2013年第1期32-36,共5页Chemistry and Industry of Forest Products

基　　金：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);东北林业大学研究生论文资助项目(ST1P10)

摘　　要：采用质量分数55%硫酸水解碱处理芦苇浆制备纳米纤维素,研究反应时间、反应温度和碱处理时间对纳米纤维素得率及其平均粒径变化的影响。单因素试验最优制备条件为碱处理时间1.0 h,反应温度60℃,反应时间2.0 h,纳米纤维素得率为54.50%,平均粒径为156.9 nm;通过傅里叶红外和X射线衍射分析,结果表明碱处理芦苇浆制备纳米纤维素为纤维素Ⅱ型。在单因素试验基础上进行正交优化试验,对纳米纤维素得率而言,正交优化最佳工艺条件为碱处理时间1.0 h,反应温度60℃,反应时间3.0 h,此条件下纳米纤维素得率最高,为55.64%,平均粒径为166.3 nm。Nano-cellulose was prepared by the hydrolysis of the alkali pretreated reed pulp with 55 % （ by mass fraction） sulfuric acid. The effects of reaction time, reaction temperature and alkali treatment time on yield and the mean size of nano-cellulose were studied. The optimizing preparation condition for single factor test is 1.0 h of alkali treatment time, 60 ℃ of reaction temperature and 2.0 h of reaction time. Under this condition, the yield of nano-cellulose is 54.50 % and its mean size is 156.9 nm. The analysis of fourier transform infrared（FT-IR） and X-ray diffraction（XRD） showed that nano-eellulose from reed pulp pretreated by alkali is cellulose type Ⅱ. The orthogonal test was investigated based on single factor test. The results showed that the technological parameters optimized by conducting orthogonal test for the yield of nano-cellulose are 1.0 h of alkali treatment time, 60 ℃ of reaction temperature and 3.0 h of reaction time. The highest yield of nano-eellulose （55.64 % ） with 166.3 nm mean size was achieved.

关 键 词：纳米纤维素 碱处理 芦苇浆 平均粒径 

分 类 号：TQ352.78[化学工程]