黄皮多糖/壳聚糖复合可食膜的制备、结构表征及理化性质  

Preparation,Structural Characterization and Physicochemical Properties of Wampee Polysaccharide/Chitosan Composite Edible Film

作　　者：方娟丽 熊群燕 龚锐枝 刘冰茹 孙朋朋 任圆圆 FANG Juanli;XIONG Qunyan;GONG Ruizhi;LIU Bingru;SUN Pengpeng;REN Yuanyuan(College of Life Science,Yangtze University,Jingzhou 434025,China)

机构地区：[1]长江大学生命科学学院,湖北荆州434025

出　　处：《现代食品科技》2024年第8期263-273,共11页Modern Food Science and Technology

基　　金：食品营养与安全国家重点实验室开放课题(SKLFNS-KF-202108);长江大学大学生创新创业训练计划项目(Yz2022233)。

摘　　要：采用水提醇沉法提取黄皮多糖(WSP-W)并将其同壳聚糖复合,制备成WSP-W/壳聚糖复合可食膜,初步测定WSP-W分子量、化学组成、红外光谱,并且考察WSP-W对壳聚糖复合可食膜的影响。结果表明,WSP-W是一种典型的均一多糖,分子量为1.6×103 ku。复合膜的FT-IR中壳聚糖分子的氨基带从1560.1 cm-1移动到了1571.7 cm-1,表明WSP-W和壳聚糖之间存在相互作用力。与单一壳聚糖膜相比,复合膜的厚度、水溶解性、溶胀率增加,水分含量降低。在光学透过率方面,波长小于500 nm时,复合膜的紫外阻隔能力较强。机械性能的研究结果显示,在WSP-W添加量为12%时,拉伸强度和断裂伸长率均达到最大值,分别为30.13 MPa和29.93%。水蒸气透过率在WSP-W 12%时达24.54g·mm/(m^(2)·d·kPa),在WSP-W 6%时,阻油性能达96.24 g·mm/(m^(2)·d)。DSC结果表明,复合膜的热稳定性更佳。DPPH自由基清除率和羟基自由基清除率(最大达99.85%)结果表明WSP-W可以提高复合膜的抗氧化活性。综上所述,WSP-W的加入能够改善单一壳聚糖膜的光学性能、力学性能、阻隔性能、抗氧化性,可为黄皮多糖的开发利用提供一定的参考。Water-soluble polysaccharide from wampee(WSP-W)was prepared through water extraction then precipitation by ethanol,and compounded with chitosan to make WSP-W/chitosan composite edible films.The molecular weight,chemical composition and infrared spectrum of WSP-W were preliminarily examined,and the effect of WSP-W on the WSP-W/chitosan composite edible film was investigated.The results showed that WSP-W was a typical homogeneous polysaccharide,with a molecular weight of 1.6×103 ku.When different concentrations of WSP-W were added,fourier transform infrared spectroscopy demonstrated that The amino band of chitosan molecule in FT-IR spectra shifted from 1560.1 cm-1 to 1571.7 cm-1 for the composite film,indicating that there was an interaction between WSP-W and chitosan.Compared with the film made with chitosan singly,the composite films exhibited increased thickness,water solubility and swelling rate but a decreased moisture content.In terms of optical transmittance,the composite films showed strong UV barrier capability at a wavelength below 500 nm.The results of the mechanical property tests showed that when the WSP-W content was 12%,the tensile strength and elongation at break reached the maximum(30.13 MPa and 29.93%,respectively).The water vapor permeability reached 24.54 g·mm/(m^(2)·d·kPa)when WSP-W was 12%,and the oil resistance capacity reached 96.24 g·mm/(m^(2)·d)when WSP-W was 6%.DSC results revealed that the thermal stability of the composite films was better.The results of the DPPH and hydroxyl radical scavenging rates showed that WSP-W could improve the film’s antioxidant activity.In summary,the addition of WSP-W can improve the optical,mechanical,barrie and antioxidant properties of chitosan film,which can provide a certain reference for the development and utilization of WSP.

关 键 词：可食性膜 壳聚糖 黄皮 结构特征 抗氧化性 

分 类 号：TS206.4[轻工技术与工程—食品科学]