花生学报2025，Vol.54Issue(4)：450-458,9.DOI:10.14001/j.issn.1002-4093.2025.04.011
可食性硫辛酸-壳聚糖复合膜制备及其对裹衣花生抗氧化性研究
Preparation and Antioxidant Activity of Edible α-Lipoic Acid Chitosan Composite Films for Coated Peanuts
摘要
Abstract
To enhance the storage stability of coated peanuts,edibleα-lipoic acid chitosan(ALA-CS)composite films were prepared using chitosan as the matrix andα-lipoic acid as functional modifier via the solution casting method.The study analyzed factors influencing the mechanical properties of ALA-CS films and investigated the effects of ALA/CS molar ratios on film characteristics,including water content,swelling degree,solubility,and water vapor permeability(WVP).Microstructure and molecular mechanism of interactions were characterized using scanning electron microscopy(SEM)and Fourier-transform infrared spectroscopy(FT-IR),while antioxidant activity and efficacy in protecting coated peanuts were evaluated.Re-sults demonstrated that the composite film with ALA/CS molar ratio of 1∶5 exhibited the optimal perform-ance:water content and WVP decreased significantly(P<0.05),and swelling degree and solubility reduced to 29.42%and 27.63%,respectively.FT-IR confirmed that lipoic acid bound to chitosan through hydrogen bonds and amide covalent bonds,while SEM revealed that a dense lamellar structure effectively masked the pungent odor of ALA and enhanced the stability of the composite films.The ALA-CS film showed significantly higher DPPH free radical scavenging rate(72.5%)and Fe3+reducing power than pure chitosan film,indicating it pos-sesses dual functionality as a physical barrier and chemical antioxidant.After 40 days of accelerated oxidation at 65℃,the peroxide value of ALA-CS coated peanuts(0.13 g/100 g)was significantly lower than that of uncoated peanut(0.51 g/100 g)and chitosan-coated peanut(0.28 g/100 g)(P<0.05),validating its superior antioxidative effect.This work provided a reference for applying ALA-CS composite films in antioxidant coatings for nuts.关键词
硫辛酸/壳聚糖/可食性膜/裹衣花生/抗氧化Key words
α-lipoic acid/chitosan/edible film/coated peanut/antioxidant分类
轻工纺织引用本文复制引用
王岩,翟硕莉,张志强,朱冰清,张彩凤..可食性硫辛酸-壳聚糖复合膜制备及其对裹衣花生抗氧化性研究[J].花生学报,2025,54(4):450-458,9.基金项目
衡水学院校级培育基金项目(2023XJZX14) （2023XJZX14）
河北省自然科学基金项目(C2023204256) （C2023204256）
