Lang Xiujie, Wang Ning, An Xuanzhe, Wang Cuntang
College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, China.
Engineering Research Center of Plant Food Processing Technology, Ministry of Education, Qiqihar 161006, China.
Polymers (Basel). 2025 May 13;17(10):1328. doi: 10.3390/polym17101328.
The development of biodegradable food packaging materials with active functionalities presents a sustainable alternative to conventional plastic films. This study developed a bioactive complex film through solvent casting technique using potato starch (PS) and κ-carrageenan (κC) as the matrix, incorporated with ethanol extract of crab-apple peel (EEC). Fourier-transform infrared analysis confirmed the formation of hydrogen bonds between the film-forming constituents. Scanning electron microscopy revealed that higher concentrations of EEC led to a relatively rough film surface. XRD indicated that the incorporation of EEC reduced the crystallinity of the potato starch. The addition of EEC significantly increased the a and b values of the complex film ( < 0.05), while the L value and opacity decreased significantly ( < 0.05). The TS, Young's modulus, and WVP of the complex films decreased significantly with increasing EEC concentration ( < 0.05). The DPPH and ABTS radical scavenging abilities of PS-κC-EEC film were enhanced from 12.35% to 75.48% and from 10.26% to 72.52%, respectively. PS-κC-EEC film exhibited strong antimicrobial activity against and . The application of the PS-κC-EEC film for the refrigerated preservation of pork demonstrated that the lipid oxidation level of wrapped pork was reduced. These results suggest that the fabricated PS-κC-EEC film could be utilized for the preservation of pork and extends its shelf life.
开发具有活性功能的可生物降解食品包装材料是传统塑料薄膜的一种可持续替代方案。本研究通过溶剂浇铸技术，以马铃薯淀粉（PS）和κ-卡拉胶（κC）为基质，加入海棠果皮乙醇提取物（EEC），制备了一种生物活性复合薄膜。傅里叶变换红外分析证实了成膜成分之间形成了氢键。扫描电子显微镜显示，较高浓度的EEC会导致薄膜表面相对粗糙。X射线衍射表明，EEC的加入降低了马铃薯淀粉的结晶度。EEC的添加显著增加了复合薄膜的a和b值（P<0.05），而L值和不透明度显著降低（P<0.05）。随着EEC浓度的增加，复合薄膜的拉伸强度、杨氏模量和水蒸气透过率显著降低（P<0.05）。PS-κC-EEC薄膜对DPPH和ABTS自由基的清除能力分别从12.35%提高到75.48%和从10.26%提高到72.52%。PS-κC-EEC薄膜对大肠杆菌和金黄色葡萄球菌表现出较强的抗菌活性。PS-κC-EEC薄膜在猪肉冷藏保鲜中的应用表明，包装猪肉的脂质氧化水平降低。这些结果表明，制备的PS-κC-EEC薄膜可用于猪肉保鲜并延长其货架期。
