化工学报 ›› 2023, Vol. 74 ›› Issue (7): 3068-3078.DOI: 10.11949/0438-1157.20230383

• 材料化学工程与纳米技术 • 上一篇    下一篇

聚电解质静电沉积改性PHBV抗氧化膜的制备与性能研究

王杰1,2(), 丘晓琳1,2(), 赵烨1,2, 刘鑫洋1,2, 韩忠强3, 许雍3, 蒋文瀚3   

  1. 1.江南大学机械工程学院,江苏 无锡 214122
    2.江苏省食品先进制造装备技术重点实验室,江苏 无锡 214122
    3.南通金丝楠膜材料有限公司,江苏 南通 226000
  • 收稿日期:2023-04-18 修回日期:2023-06-25 出版日期:2023-07-05 发布日期:2023-08-31
  • 通讯作者: 丘晓琳
  • 作者简介:王杰(1995—),男,硕士研究生,wangjie9535@163.com
  • 基金资助:
    江苏省产学研合作项目(BY2021130)

Preparation and properties of polyelectrolyte electrostatic deposition modified PHBV antioxidant films

Jie WANG1,2(), Xiaolin QIU1,2(), Ye ZHAO1,2, Xinyang LIU1,2, Zhongqiang HAN3, Yong XU3, Wenhan JIANG3   

  1. 1.School of Mechanical Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
    2.Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology, Wuxi 214122, Jiangsu, China
    3.Nantong Jinsinan Membrane Materials Co. , Ltd. , Nantong 226000, Jiangsu, China
  • Received:2023-04-18 Revised:2023-06-25 Online:2023-07-05 Published:2023-08-31
  • Contact: Xiaolin QIU

摘要:

食品中的过渡金属离子能够催化氧化脂质导致食品质量下降,因此开展抗氧化包装研究具有重要意义。本研究以覆盖聚丙烯酸(PAA)接枝层的聚(3-羟基丁酸酯-co-3-羟基戊酸酯)(PHBV)薄膜为基材,壳聚糖(CS)和海藻酸钠(SA)为聚电解质,通过层层自组装法制得具备金属螯合能力的PHBV-g-PAA/(CS/SA) n 非释放型抗氧化包装膜,研究聚电解质溶液浓度和pH对活性膜化学性质、微观形貌、活性基团含量以及Cu(Ⅱ)离子螯合能力的影响。结果表明:通过傅里叶变换红外光谱仪与酸性橙7染色法对活性膜进行表征,证明CS和SA聚电解质已成功交替组装到PHBV-g-PAA薄膜表面;通过SEM观察活性膜形貌结构发现,随着聚电解质溶液浓度和pH增大,组装层厚度不断增加,当CS和SA聚电解质溶液浓度为1.0 mg/ml、pH分别为5.0和7.0时,聚电解质组装层较为均匀平整;此时,活性膜表面氨基密度为136.38 nmol/cm2,Cu(Ⅱ) 离子螯合量为124.93 nmol/cm2。该活性膜具备一定的抗氧化能力且高于PHBV及PHBV-g-PAA薄膜,在食品包装领域具有广阔的应用前景。

关键词: 聚(3-羟基丁酸酯-co-3-羟基戊酸酯), 聚合物, 层层自组装, 吸附(作用), 金属离子螯合, 抗氧化活性包装, 复合材料

Abstract:

Transition metal ions in food can catalyze the oxidation of lipids and lead to food quality degradation, so it has great significance to carry out antioxidant packaging research. In this study, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films covered with poly(acrylic acid) (PAA) graft layer as the substrate, chitosan (CS) and sodium alginate (SA) as polyelectrolytes were used to produce PHBV-g-PAA/(CS/SA) n non-release antioxidant packaging films with metal chelating ability by layer self-assembly method. The effects of polyelectrolyte solution concentration and pH on the chemical properties, microscopic morphology, active group content and Cu() ion chelating ability of the active membranes were investigated. The results show that the active films were characterized by Fourier transform infrared spectroscopy with acid orange 7 staining, demonstrating that CS and SA polyelectrolytes have been successfully assembled alternately onto the surface of PHBV-g-PAA films. It was found that the thickness of the assembled layer increased with the growth of the polyelectrolyte solution concentration and pH by SEM. When the concentration of CS and SA polyelectrolyte solutions was 1.0 mg/ml and the pH was 5.0 and 7.0 respectively, the polyelectrolyte assembly layer was more uniform and flat. At this time, the surface amino density of the active film was 136.38 nmol/cm2 and the amount of Cu(Ⅱ) ions chelated was 124.93 nmol/cm2. The active film has a certain antioxidant capacity and was higher than PHBV and PHBV-g-PAA films, which has a broad application prospect in the field of food packaging.

Key words: poly(3-hydroxybutyrate-co-3-hydroxyvalerate), polymer, layer self-assembly, adsorption (action), metal ion chelation, antioxidant active packaging, composite materials

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