纤维素纳米晶体提高箱纸板强度性能的研究  

Improving the Strength Properties of Liner Board by Cellulose Nanocrystal

作　　者：王营超 贺会利 王强[1] 刘姗姗[1] 穆永生 韩陈晓 WANG Yingchao;HE Huili;WANG Qiang;LIU Shanshan;MU Yongsheng;HAN Chenxiao(State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp&Paper of Science and Technology of Education Ministry,Qilu University of Technology(Shandong Academy of Sciences),Ji’nan,Shandong Province,250353;Jiangsu Jinke Total Solutions Co.,Ltd.,Nanjing,Jiangsu Province,211200;Shandong Century Sunshine Paper Group Co.,Ltd.,Weifang,Shandong Province,262499)

机构地区：[1]齐鲁工业大学(山东省科学院)生物基材料与绿色造纸国家重点实验室/制浆造纸科学与技术教育部重点实验室,山东济南250353 [2]江苏精科嘉益工业技术有限公司,江苏南京211200 [3]山东世纪阳光纸业集团有限公司,山东潍坊262499

出　　处：《中国造纸》2020年第12期18-25,共8页China Pulp & Paper

基　　金：国家自然科学基金(31670584,31971602);山东省省属高校优秀青年人才联合基金(ZR2018JL015);山东省高等学校青创科技计划创新团队(2019KJC014)。

摘　　要：本研究以废纸浆为原料,采用硫酸水解法制备纤维素纳米晶体(CNC),并将其用于箱纸板的增强。结果表明,所制备的CNC呈典型的棒状结构,其直径和长度范围分别为11~23 nm和115~240 nm,长径比为5∶1~22∶1,Zeta电位为-56.37 mV,CNC聚集态呈纤维素I型结构,结晶度为71.1%,热稳定性较废纸浆略有降低;在CNC用量为3%的一元增强实验中,箱纸板的抗张指数、撕裂指数、耐破指数、环压指数和耐折度分别为30.5 N·m/g、6.22 mN·m2/g、1.55 kPa·m2/g、9.18 N·m/g和3次;将2%阳离子淀粉(CS)和阳离子聚丙烯酰胺(CPAM)分别与3%CNC复合形成二元增强体系时,箱纸板的抗张指数、撕裂指数、耐破指数、环压指数和耐折度较CNC一元增强时分别提高了30.5%、4.1%、12.7%、11.6%、33.3%和21.9%、3.5%、12.3%、10.6%、33.3%。In this study,cellulose nanocrystal(CNC)was prepared by sulfuric acid hydrolysis from recycled pulp and applied to enhance the liner board.The results showed that the prepared CNC displayed a typical rod-like structure with a diameter and length of about 11~23 nm and 115~240 nm,respectively,the aspect ratio was 5∶1 to 22∶1 and Zeta potential was-56.37 mV.The aggregation state of CNC pre⁃sented cellulose I structure with the crystallinity of 71.1%,and its thermal stability was slightly lower than that of recycled pulp.In the rein⁃forcement experiment with 3%CNC dosage,tensile index,tearing index,burst index,ring crush index and folding endurance of liner board were 30.5 N·m/g,6.22 mN·m^2/g,1.55 kPa·m^2/g,9.18 N·m/g and 3 times,respectively.Then,2%cationic starch(CS)and 2%cation⁃ic polyacrylamide(CPAM)were combined with 3%CNC respectively to form the binary reinforcement systems,tensile index,tearing in⁃dex,burst index,ring crush index and folding endurance of liner board were further increased by 30.5%,4.1%,12.7%,11.6%,33.3%and 21.9%,3.5%,12.3%,10.6%,33.3%compared to those of 3%CNC dosage respectively.

关 键 词：废纸浆 纤维素纳米晶体 阳离子淀粉 阳离子聚丙烯酰胺 增强剂 强度性能 

分 类 号：TS724[轻工技术与工程—制浆造纸工程]