【作者】 刘莉； 陈蕴智； 张正健；

【Author】 LIU Li,CHEN Yunzhi and ZHANG Zhengjian College of Packaging and Printing Engineering,Tianjin University of Science & Technology, Tianjin,China

【机构】 天津科技大学包装与印刷工程学院；

【摘要】 本研究以漂白硫酸盐阔叶木浆为原料,采用TEMPO/NaClO/NaBr氧化系统进行浆料化学预处理,经高压均质机破碎,制备微纤化纤维素。通过改变TEMPO,NaClO,NaBr用量、高压均值次数,优化预处理工艺和均质化条件。实验研究表明,TEMPO,NaClO,NaBr用量分别为0.25%、2.5%、60%(对1g绝干浆样),均值次数为20次,均质压力为60MPa时制备的MFC性质最优。然后对MFC涂布后的包装纸进行机械性能和阻隔性能检测,实验测得:MFC涂布包装纸的机械性能显著提高(尤其耐折度大约提高5倍),透气度大约降低100倍。更多还原

【Abstract】 Microfibrillated cellulose(MFC) was prepared from the bleached kraft hardwood pulp using TEMPO/NaClO/NaBr oxidation system and high pressure homogenization.By changing dosages of the TEMPO,NaClO and NaBr,the pressure and times of homogenization, pretreatment and homogenization process were optimized.Experimental investigation indicated that for making MFC of high quality,0.25%TEMPO,2.5%NaBr,60%NaClO(based on oven dry pulp),20 times of homogenization,pressure of 60MPa in the process of treatment were required. At last,the mechanical and barrier properties were tested after the base paper was coated by homemade MFC.The study suggested that mechanical properties(especially 5 times increase of the folding strength) increased substantially and air permeability decreased by 100times.更多还原