氧化石墨烯-壳聚糖复合保鲜剂对“六月红”荔枝保鲜性能的研究  

The preservative properties of “June red” litchi by graphene oxidechitosan compound preservative

作　　者：刘括 王成国 聂国朝 LIU Kuo;WANG Chengguo;NIE Guochao(College of Chemistry and Food Science,Yulin Normal University,Guangxi Key Laboratoryof Agricultural Resources Chemistry and Biotechnology,Yulin 537000)

机构地区：[1]玉林师范学院化学与食品科学学院广西农产资源化学与生物技术重点实验室

出　　处：《食品科技》2019年第7期62-67,共6页Food Science and Technology

基　　金：2016年度广西壮族自治区中青年教师基础能力提升项目(KY2016YB362);国家自然科学基金项目(8166058)

摘　　要：为了探讨氧化石墨烯-壳聚糖(GO-CS)复合保鲜剂对“六月红”荔枝的保鲜性能,以氧化石墨烯(GO)和壳聚糖(CS)为原料,制得GO-CS复合保鲜剂。采用红外光谱(FT-IR)和扫描电镜(SEM)测试手段,对其结构和性能进行了表征。再用蒸馏水、CS溶液、GO-CS复合保鲜剂在温度(4±1)℃冷藏条件下保鲜“六月红”荔枝,以好果率、失重率、可滴定酸含量、可溶性固形物含量为指标进行研究。结果表明,GO和CS以CO—NH成功键合在一起,GO-CS复合保鲜剂在荔枝果皮表面上形成均匀完整的保鲜膜,保鲜性能明显优于CS和蒸馏水。储存25d时,GO-CS复合保鲜剂保鲜的荔枝好果率为50%,失重率相对其他2组上升趋势最缓慢,可滴定酸含量下降的速度最缓慢,可溶性固形物含量仅下降4%。In order to investigate the preservative properties of graphene oxide-chitosan(GO-CS)compound preservative for“June red”litchi,GO-CS compound preservative was synthesized by using graphene oxide(GO)and chitosan(CS)as raw materials.The structure and properties of the GO-CS compound were characterized by FTIR and SEM.The“June red”litchi were preserved by distilled water,CS solution and GO-CS compound preservative at(4±1)℃refrigeration.The good fruit rate,weight loss rate,titratable acidity and soluble solid content were used to evaluate the quality of litchi.The results showed that GO and CS was successfully bonded together and the GO-CS compound preservative formed uniform and complete preservative film on the surface of litchi peel,and the preservative property was significantly better than that of CS and distilled water.When stored to 25 days,the good fruit rate of litchi preserved by GO-CS compound preservative was 50%.Relative to other two groups,the weight loss rate had the slowest rising trend.titratable acidity decreased most slowly,soluble solid content decreased by only 4%.

关 键 词：氧化石墨烯 壳聚糖 复合保鲜剂 “六月红”荔枝 保鲜 

分 类 号：TS255.36[轻工技术与工程—农产品加工及贮藏工程]