Wood cellulose films regenerated from NaOH/urea aqueous solution and treated by hot pressing for food packaging application  

作　　者：Kehao Huang Anne Maltais Jinxia Liu Yixiang Wang 

机构地区：[1]Department of Food Science and Agricultural Chemistry,McGill University,Ste Anne de Bellevue,Quebec,H9X 3V9,Canada [2]Institut de Technologie des Emballages et du Génie Alimentaire (ITEGA),Montréal,Québec,H1N 1C1,Canada [3]Department of Civil Engineering,McGill University,Montreal,Quebec,H3A 0C3,Canada

出　　处：《Food Bioscience》2022年第6期1824-1831,共8页食品生物科学（英文）

基　　金：financial support from the Fonds de Recherche du Quebec-Nature et Technologies(2021-PR-283095);Canada Foundation for Innovation(39173);Mitacs Accelerate(FR68649);We would like to acknowledge McGill University ECP3 Multi-Scale Imaging Facility for the image acquisition.

摘　　要：Cellulose films made from‘green’solvent provide the possibility to mitigate environmental pollution caused by non-degradable plastic packaging.Herein,regenerated cellulose films were prepared from five wood pulps in NaOH/urea aqueous solution,dried either at ambient conditions or by hot pressing,and tested as biodegradable packaging materials.The results revealed that different wood origins did not cause much difference in the structure of cellulose films.However,hot-pressing could not only efficiently remove water from wet films,but also significantly improve the tensile strength and water vapor barrier property of regenerated films.The RC-P-HP film had the tensile strength of 85.00±3.26 MPa,Young's modulus of 6.45±0.36 GPa,and water vapor permeability of 3.59±0.14×10^(−7) gm^(−1)h^(−1)Pa^(−1),and exhibited the similar capacity as the commercial plastic wrap during the preservation of cherry tomatoes for up to 16 days.Therefore,this study demonstrates a feasible strategy to fabricate wood cellulose films for biodegradable food packaging.

关 键 词：Wood pulps Cellulose films REGENERATION Hot pressing Food packaging 

分 类 号：TS206.4[轻工技术与工程—食品科学]