文献名： Multilayer surface construction for enhancing barrier properties of cellulose-based packaging

作者 ： Wangxia Wang ^abc1 , Feng Gu ^a1 , Zhifei Deng ^a , Yang Zhu ^a , Jing Zhu ^a , Tianyu Guo ^b , Junlong Song ^b , Huining Xiao ^c

^a School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China

^b Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China

^c Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B5A3, Canada

摘要： It has been a consistent challenge to develop eco-friendly packaging in its entire life cycle with multiple barriers. Herein, a lignocellulose-derived strategy was developed for enhancing barrier properties of cellulose-based packaging. Porosity and hydrophilicity of paper packaging were remedied by the sequential deposition of oxalic acid modified microfibrillated cellulose (OMFC) and infiltration of nanosized alkaili lignin (NAL). OMFC deposition and NAL infiltration could fill the void among fibers and create hydrophobic micro/nano-roughness on paper surface, which showed synergetic effect on enhancing barrier and mechanical properties by self-bonding and crosslinking between cellulose and lignin. Water vapor transmission rate was reduced by 93 % with initial water contact angle at 113°. Besides, more than four-fold increase in tensile strength along with persisted water and grease resistance were achieved. The result suggests the barrier-enhanced packaging by multilayer surface construction has great potential in bio-based applications considering the biodegradability, biocompatibility, and recyclability.

关键词： Eco-friendly packaging ; Micro/nano-roughness ; Multiple barriers ; Cellulose