氧化羟丙基淀粉基保鲜膜的制备与性能研究  

Study on the Preparation and Properties of Oxidized Hydroxypropyl Starch-Based Plastic Wrap

作　　者：黄明杰 周晓媛[1] 杨云龙 HUANG Ming-jie;ZHOU Xiao-yuan;YANG Yun-long(Collega of Packing and Material Engineering,Hunan University of Technology,Zhuzhou 412007,China)

机构地区：[1]湖南工业大学包装与材料工程学院,湖南株洲412007

出　　处：《绿色包装》2024年第3期14-20,共7页Green Packaging

基　　金：湖南省教育厅科学研究项目资助项目(22B0595);湖南省自然科学基金青年基金项目(2023JJ40258)。

摘　　要：本文以氧化羟丙基淀粉为成膜基材,制备综合性能优良的绿色环保保鲜膜。分别研究了以不同增塑剂(甘油、山梨醇),交联剂(三偏磷酸钠、柠檬酸、CaCl2)对氧化羟丙基淀粉进行改性。分析不同助剂对保鲜膜性能的影响和保鲜膜对圣女果保鲜效果的影响。研究结果表明,甘油与山梨醇的比例为5:3,保鲜膜增塑时的断裂伸长率对比纯淀粉膜提升了32倍;交联剂改性后的淀粉膜相对未改性淀粉膜的性能均有不同程度的提升,其中三偏磷酸钠交联改性的淀粉膜效果明显,其拉伸强度提高了4倍,耐水性提高了1.5倍,透湿性降低了74%。改性后的保鲜膜具有耐水性高、透湿性低的特点更有利于保鲜,8天后与空白组对比失重率降低了77%。保鲜效果得到了改善。In this paper,oxidized hydroxypropyl starch was used as the film-forming substrate to prepare a green environmental protection plastic wrap with excellent comprehensive performance.Different plasticizers(glycerin,sorbitol)and cross-linking agents(sodium trimetaphosphate,citric acid,CaCl2)were used to modify hydroxypropyl starch oxide.The effects of different additives on the performance of plastic wrap and the effect of plastic wrap on the preservation effect of cherry tomatoes were analyzed.The results showed that the elongation at break of plastic wrap with a ratio of glycerol to sorbitol was 5:3 and the elongation at break was increased by 32 times compared with pure starch film.Compared with the unmodified starch film,the performance of the starch film modified by the crosslinker was improved to different degrees,among which the starch film modified by sodium trimetaphosphate crosslinking had obvious effects,its tensile strength increased by 4 times,water resistance increased by 1.5 times,and moisture permeability decreased by 74%.The modified plastic wrap has the characteristics of high water resistance and low moisture permeability,which is more conducive to freshness,and the weight loss rate compared with the blank group is reduced by 77%after 8 days.The freshness preservation effect has been improved.

关 键 词：保鲜膜 氧化羟丙基淀粉 增塑剂 交联剂 

分 类 号：TB48[一般工业技术—包装工程]