高阻隔聚乳酸/蒙脱土薄膜的制备及其在冷鲜羊肉包装中的应用

陈钟生; 张元; 刘敏; 寇竟邦; 白嘉鑫; 董同力嘎; 云雪艳

doi:10.19554/j.cnki.1001-3563.2025.13.016

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包装工程（技术栏目） ›› 2025, Vol. 46 ›› Issue (13) : 141-150. DOI: 10.19554/j.cnki.1001-3563.2025.13.016

农产品保鲜与食品包装

高阻隔聚乳酸/蒙脱土薄膜的制备及其在冷鲜羊肉包装中的应用

陈钟生^1,4, 张元^1,4, 刘敏^1,2,4, 寇竟邦^1,4, 白嘉鑫^1,4, 董同力嘎^1,3,4, 云雪艳^1,3,4,*

作者信息 +

Fabrication of High-barrier Polylactic Acid/Montmorillonite Composite Films and Their Application in Chilled Mutton Packaging

CHEN Zhongsheng^1,4, ZHANG Yuan^1,4, LIU Min^1,2,4, KOU Jingbang^1,4, BAI Jiaxin^1,4, DONG Tungalag^1,3,4, YUN Xueyan^1,3,4,*

Author information +

文章历史 +

摘要

目的开发一种具有优异阻隔性能,并适用于冷鲜羊肉保鲜的可降解绿色食品包装。方法利用羧甲基纤维素钠（CMC-Na）辅助分散蒙脱土（MMT）并形成稳定悬浮液,通过真空抽滤诱导MMT片层水平排列,随后借助壳聚糖（CS）将MMT阻隔层固着于PLLA基底,制备高阻隔聚乳酸/蒙脱土（PLLA/CS/MC）薄膜。分析了薄膜的微观形貌、力学性能、阻隔性能,并评估其在冷鲜羊肉保鲜中的应用效果。结果 MMT片层的部分插层和定向排列使PLLA/CS/MC薄膜实现了超高的阻隔性能（OTR<0.008 cm³/(m²·d)）和紫外阻隔能力,同时保持了中等的透明度（56.8%）。力学性能测试也表明,阻隔层并未对PLLA的力学性能造成不利影响。此外,在冷鲜羊肉保鲜实验中,PLLA/CS/MC薄膜组呈现最低的腐败速率,贮藏25 d后菌落总数为5.95 lg(CFU/g),硫代巴比妥酸含量为0.98 mg/kg,挥发性盐基总氮含量为19.47 mg/100 g,pH值为5.85,冷鲜羊肉还处于二级鲜度。结论 PLLA/CS/MC薄膜在冷鲜羊肉食品包装应用中有效减缓了冷鲜羊肉贮藏期间各项指标的腐败速率,使冷鲜羊肉的货架期延长至25 d,为提高PLLA薄膜阻隔性能及其在冷鲜羊肉包装中的应用提供理论依据。

Abstract

The work aims to develop a biodegradable green food packaging with excellent barrier properties and suitable for the preservation of chilled mutton. CMC-Na was used to assist in the dispersion of MMT to form a stable suspension, and the horizontal alignment of MMT sheet layers was induced by vacuum filtration, followed by the preparation of high barrier polylactic acid/montmorillonite (PLLA/CS/MC) films by fixing the MMT barrier layer to the PLLA substrate with the help of chitosan (CS). The micro-morphology, mechanical properties, and barrier properties of the films were analyzed and evaluated for their application in the preservation of chilled mutton. The experimental results showed that the exfoliated state and oriented alignment of the MMT sheet layers enabled the PLLA/CS/MC films to achieve ultra-high barrier properties (OTR<0.008 cm³/m²·d) and UV-blocking ability, while maintaining moderate transparency (56.8%). Mechanical property tests also showed that the barrier layer did not adversely affect the mechanical properties of PLLA. In addition, the PLLA/CS/MC film group presented the lowest spoilage rate in the chilled mutton preservation experiment. After 25 days of storage, it produced 5.95 lg(CFU/g) of total colony count, 0.98 mg/kg of thiobarbituric acid, 19.47 mg/100g of total volatile saline nitrogen, and a pH value of 5.85, and the chilled mutton was still in the second level of freshness. In summary, PLLA/CS/MC films effectively slow down the corruption rate of various indicators during storage of chilled mutton in the application of chilled mutton packaging, and extended the shelf life of chilled mutton to 25 d. It provides a theoretical basis for the improvement of the barrier performance of PLLA films and their application in chilled mutton packaging.

导出引用

陈钟生, 张元, 刘敏, 寇竟邦, 白嘉鑫, 董同力嘎, 云雪艳. 高阻隔聚乳酸/蒙脱土薄膜的制备及其在冷鲜羊肉包装中的应用[J]. 包装工程（技术栏目）. 2025, 46(13): 141-150 https://doi.org/10.19554/j.cnki.1001-3563.2025.13.016

CHEN Zhongsheng, ZHANG Yuan, LIU Min, KOU Jingbang, BAI Jiaxin, DONG Tungalag, YUN Xueyan. Fabrication of High-barrier Polylactic Acid/Montmorillonite Composite Films and Their Application in Chilled Mutton Packaging[J]. Packaging Engineering. 2025, 46(13): 141-150 https://doi.org/10.19554/j.cnki.1001-3563.2025.13.016

中图分类号： TB484.9

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