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当前位置: 首页 > 文章 > 五节芒纤维素纳米晶体制备工艺的正交分析 浙江农林大学学报 2014,31 (3) 399-403
Position: Home > Articles > Orthogonal experiments and analysis on cellulose nano-crystals extracted from Miscanthus floridulus Journal of Zhejiang A&F University 2014,31 (3) 399-403

五节芒纤维素纳米晶体制备工艺的正交分析

作  者：
陈宇飞;吴强;徐光密;王静芳;傅深渊;钱俊
单  位：
浙江农林大学工程学院
关键词：
木材科学与技术;五节芒;酸解;纤维素纳米晶体;产率;Zeta电位
摘  要：
为高效利用五节芒Miscanthus floridulus,通过硫酸酸解五节芒纤维素制备了纤维素纳米晶体(CNC),并采用正交分析法考察了硫酸质量分数、酸解时间和反应温度对五节芒CNC产率、悬浮液稳定性和CNC尺寸的影响。透射电镜(TEM)研究结果表明:用酸解法可成功制备五节芒CNC,CNC为刚性棒状结构,长度为100~200nm,直径为5~15 nm,产率为25%~50%。动态光散射(DLS)和Zeta电位测试发现,五节芒CNC悬浮液的稳定性很好,DLS得到的CNC流体力学直径略小于由TEM观察到的CNC长度。正交分析表明,3个工艺参数对CNC产率的影响依次为:硫酸质量分数(P=0.03),酸解时间(P=0.06),反应温度(P=0.35);对CNC流体力学直径的影响依次为:硫酸质量分数(P=0.03),反应温度(P=0.22),酸解时间(P=0.38)。制备五节芒CNC的最优工艺条件为:硫酸质量分数(62%),酸解时间(45 min),反应温度(45℃)。
译  名：
Orthogonal experiments and analysis on cellulose nano-crystals extracted from Miscanthus floridulus
作  者：
CHEN Yufei;WU Qiang;XU Guangmi;WANG Jingfang;FU Shenyuan;QIAN Jun;School of Engineering, Zhejiang A & F University;
关键词：
wood science and technology;;Miscanthus floridulus;;acid hydrolysis;;cellulose nano-crystal;;yield;;Zeta potential
摘  要：
To make better use of the Miscanthus floridulus stalk, sulfuric acid hydrolysis was used to prepare an M. floridulus cellulose nano-crystal(CNC). The influence of sulfuric acid mass fraction, acid hydrolysis time, and temperature on CNC yield, suspension stability, and particle size were analyzed through orthogonal experiments to determine the optimal reaction condition. CNC morphology and its suspension stability were studied using transmission electron microscopy(TEM) and dynamic light scattering(DLS). Results showed M.floridulus CNC had a rod-like structure 100-200 nm in length and 5-15 nm in diameter with yield ranging from 25%-50%. Zeta potential results revealed that M. floridulus CNC suspensions were stable, and the hydrodynamic diameter of CNC measured with DLS was slightly shorter than that measured by TEM images. The orthogonal analysis for CNC yield showed that the order of the effect from the three factors was sulfuric acid mass fraction(P=0.03)>acid hydrolysis time(P=0.06)>temperature(P=0.35); for CNC particle size,the order of the effect from the three factors was sulfuric acid mass fraction(P=0.03)>acid hydrolysis temperature(P=0.22)>time(P=0.38). In summary, the optimal reaction condition for preparing M. floridulus CNC was sulfuric acid mass fraction(62%), hydrolysis time(45 min) and temperature(45 ℃).

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