Improvement of mechanical and barrier properties of PLA films via coated antimicrobial polyurethane

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-03-24 DOI:10.1016/j.porgcoat.2025.109258

Zhixiu Liu , Junjie Wang , Haili Wang , Xiaoyu Dong , Jinghua Du , Sheng Cheng , Yunsheng Ding

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引用次数: 0

Abstract

High performance and environmentally friendly films for food packaging play an important role in improving food safety and protecting the environment after discarding. In this paper, bio-based polycarbonate diol (PCDL), isophorone diisocyanate (IPDI), isophorone diamine (IPDA), N-methyldiethanolamine (MDEA) and 1,6-dibromohexane were employed as main raw materials to prepare a series of polyurethanes with quaternary ammonium groups (QPUs). Subsequently, a bio-based coated film named as PLA-QPU was prepared by uniformly bar-coating the polyurethane slurry onto one surface of the PLA film. The mechanical testing results exhibit that PLA-QPU film has high tensile strength (63 MPa) and toughness (196 MJ/m³), and the PLA-QPU film is more stretchable with elongation at break increasing from 7 % to 47 % in comparing with uncoated PLA film. The antimicrobial testing results show that the antimicrobial ratio of the QPU film against E. coli and S. aureus was 91 % and 88 %, respectively. The water vapor barrier properties testing results reveal that PLA-QPU coated film has a significant water vapor barrier property (57.8 g/m²·day). The PLA-QPU coated film was evaluated for packaging cherry tomatoes and it maintained fruit freshness, texture, and visual quality effectively for up to 16 days. Therefore, the high-performance PLA-QPU coated film shows great promise as sustainable in food preservation.

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.