壳聚糖金属锌衍生物的制备及常温樱桃保鲜研究
2015-09-09解胜利苟建霞丁宗旺
解胜利 苟建霞 丁宗旺
摘要:壳聚糖作为高分子有机化合物,其本身及其衍生物有着重要的生理活性和生物相容性,它在食品、医药等行业有着广阔的应用前景。通过单因素试验和正交试验研究了壳聚糖金属锌衍生物的制备工艺,通过傅里叶变换红外光谱仪测定壳聚糖金属锌衍生物的结构,用原子吸收分光光度计测定滤液中金属锌的残余量,确定金属锌与壳聚糖的螯合程度。结果表明,制备的最佳工艺条件是pH为5、温度为50 ℃、反应时间为6 h,用壳聚糖金属锌衍生物保鲜樱桃的最佳浓度为1%。
关键词:壳聚糖;衍生物;樱桃;保鲜
中图分类号:O629.12;TS205.9 文献标识码:A 文章编号:0439-8114(2015)14-3485-04
DOI:10.14088/j.cnki.issn0439-8114.2015.14.039
Preparation of Chitosan Metal Zinc Derivatives and the Application on the Preservation of Cherry at Room Temperature
XIE Sheng-li,GOU Jian-xia,DING Zong-wang
(Department of Chemical Engineering, Binzhou University, Binzhou 256603,Shandong,China)
Abstract:Chitosan is a polymer organic compound and has high compatibility and important biological activity, which has a broad application prospect in food, medicine and other industries. The experiment focused on the technology of chitosan metal zinc derivatives preparation and the properties of transition metal chelate based on the single factor experiment and orthogonal experiment.The determination of chitosan metal zinc derivatives was tested by infrared spectrometer, and the residual amount of zinc metal in leachate was tested by atomic absorbed spectrophotometry.The results showed that the optimal conditions for the preparation were pH 5, temperature 50 ℃ and reaction time 6 h. The optimal concentration of chitosan metal zinc derivatives in the preservation cherry was 1%.
Key words: chitosan; derivatives; cherry; preservation
壳聚糖是通过浓碱处理天然产物甲壳素脱去乙酰基而得到的产物。它是天然多糖中惟一的碱性多糖,作为高分子有机物,已被现代科学称之为继糖、蛋白质、脂肪、维生素、矿物质等五大生命要素之后的第六生命要素。壳聚糖及其衍生物在食品、蔬果保鲜、废水处理、生物医学、化妆品等领域均有很高的应用价值[1]。大多数壳聚糖金属衍生物具有良好的抑菌和保鲜性能。壳聚糖具有良好的保湿性、润湿性、无毒副作用且具有良好的成膜性和较强的抗菌保鲜防腐能力,将壳聚糖涂到果蔬表面后可成膜,此膜具有半透性,对氧气、二氧化碳、乙烯具有一定的选择渗透作用,并且还有一定的保水性,特别是一些壳聚糖金属衍生物有特殊的抑菌性[2-12]。本试验研究了壳聚糖金属锌衍生物的制备工艺及在果蔬保鲜中的应用,期望对壳聚糖金属锌衍生物的保鲜作用研究提供一定的依据。……
