摘要
为了提高食品包装用纸的阻隔及机械性能,以玉米淀粉为原料制备阳离子淀粉(CS),并与纳米微晶纤维素(NCC)复配制备一种复合施胶剂,然后在牛皮纸原纸表面涂布,研究了NCC含量对涂布后牛皮纸的水蒸气阻隔性、吸水性、抗油性、透气性及抗张强度的影响。结果表明,NCC含量为15%时,NCC/CS涂布牛皮纸的阻隔性和抗张强度最好,水蒸气透过率、Cobb_(60)值和透气度由牛皮纸原纸的3.14×10^(-11)g/(cm·s·Pa)、64.7 g/m^(2)和1.525μm/(Pa·s)降低为1.52×10^(-11)g/(cm·s·Pa)、31.4 g/m^(2)和0.015μm/(Pa·s),防油等级由牛皮纸原纸的1提升为12、抗张指数由46.3 N·m/g增加为55.1 N·m/g。牛皮纸的阻隔性和抗张强度提升主要归因于适量的NCC添加增强了阳离子淀粉涂层的成膜性。
To improve the barrier and mechanical properties of food packaging paper,the cationic starch(CS)prepared using corn starchwas combined with the nanocrystaline cellulose(NCC)prepared using microcrystalline cellulose to obtain a kind of complex sizing agent.The water vapor penetration properties,water absorption,oil resistance,air permeability and tensile strength of kraft paper coated by complex sizing agent of NCC/CS were measured to investigate the offect of content of NCC after sizing.The results indicated when the NCC content was 15%,the best barrier and tensile properties were obtained.Compared to untreated kraft paper,the water vapor penetration rate,Cobb;and air permeability decreased from 3.14×10^(-11)g/(cm·s·Pa),64.7 g/m^(2)and 1.525μm/(Pa·s)to 1.52×10^(-11)g/(cm·s·Pa),31.4 g/m^(2)and 0.015μm/(Pa·s).The oil resistance grade enhanced from 1 to 12 and the tensile index increased from 46.3 N·m/g to 55.1 N·m/g.The enhanced barrier and mechanical properties of kraft paper coated by cationic starch/NCC could be attributed to the improved the filmform property of cationic starch coating with optimum NCC content.
作者
宋振源
贾智
SONG Zhenyuan;JIA Zhi(Zhengzhou Technology and Business University,Zhengzhou,He’nan Province,451400;School of Material Science and Engineering,Lanzhou University of Technology,Lanzhou,Gansu Province,730050)
出处
《中国造纸》
CAS
北大核心
2022年第1期56-61,共6页
China Pulp & Paper
关键词
阳离子淀粉
纳米微晶纤维素
牛皮纸
阻隔性能
机械性能
cationic starch
nanocrystaline cellulose
barrier properties
food packaging
mechanical properties
