文献类型：期刊文献

英文题名：Characterization of biodegradable food packaging films prepared with polyamide 4: Influence of molecular weight and environmental humidity

作者：Zhang, Di[1,2];Nie, Rong[1,2];Zhang, Chunyue[1,3];Wang, Yibing[1,2];Wang, Li[1,2];Chen, Tao[2,4];Zhao, Liming[1,2,3,5]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Biobased Mat Engn, China Natl Light Ind, Shanghai, Peoples R China;[3]Shanghai Collaborat Innovat Ctr Biomfg Technol SCI, Shanghai, Peoples R China;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Shanghai Frontiers Sci Ctr Optogenet Tech Cell Met, Sch Pharm, Shanghai, Peoples R China

年份：2022

卷号：1

期号：3-4

起止页码：276

外文期刊名：FOOD BIOENGINEERING

收录：EI(收录号：20232414215177);WOS:【ESCI(收录号:WOS:001328267800002)】；

基金：National Key R&D Program of China, Grant/Award Number: 2017YFB0309302; Research and Development of Technical Standards for Bio-based Material Polybutyrolactam Project, Grant/Award Number: 21DZ2205900; Open Project Funding of the State Key Laboratory of Bioreactor Engineering, ECUST, Grant/Award Number: ZDXM2019; Higher Education Discipline Innovation Project, Grant/Award Number: B18022r No Statement Availabler No Statement Availabler No Statement Available

语种：英文

外文关键词：barrier properties; biodegradable material; food packaging; mechanical properties; moisture adsorption; polyamide 4

摘要：The development of biodegradable packaging materials focuses on their barrier properties and mechanical properties, which are critical parameters for food protection. Synthetic biodegradable material polyamide 4 (PA4) may offer outstanding capacities for packaging due to its rigid molecular structure. The current study originally reveals the various physical properties of PA4 films and explores the influence of its internal structure, molecular weight, and external environment, environmental humidity, on its performance to provide further guidance for PA4 application. PA4 (M eta = 18,000 g/mol) films showed tensile strength (TS) of 47.5 +/- 1.3 MPa, elongation at break (EB) of 228% +/- 30%, oxygen permeability of 7.83 +/- 3.32 x 10-17 cm3 m-1 s-1 Pa-1, and water vapor permeability of 4.34 +/- 0.06 x 10-11g m-1 s-1 Pa-1. The TS and EB of PA4 improved slightly with increasing molecular weight, while the barrier characteristic remained unchanged. The moisture adsorption capabilities of PA4 films were similar to natural hydrophilic polymers. The mechanical characteristic of PA4 changed from brittle to ductile with the increase in relative humidity. Overall, PA4 can be considered to be a promising food packaging material since it presented better mechanical and oxygen barrier properties than those of commercial food packaging polymers. Colorless and translucent polyamide 4 (PA4) films, which are both bio-based and biodegradable, were prepared by the solution casting method in a dual-solvent system. The physical properties of single PA4 films were originally characterized, and the effects of molecular weight and environmental humidity on PA4 were investigated. image