CTAB对壳聚糖/蒙脱土复合保鲜膜结构和性能的影响  

Effect of CTAB on the structure and properties of chitosan /montmorillonoid composite food preservative films

作　　者：何明[1] 汪志芬[1] 李思东[2] 杨锡洪[2] 杨子明[3] 李普旺[3] 

机构地区：[1]海南大学材料与化工学院,海南海口570228 [2]广东海洋大学食品科技学院,广东湛江524001 [3]中国热带农业科学院农产品加工研究所,广东湛江524001

出　　处：《食品工业科技》2014年第9期53-56,共4页Science and Technology of Food Industry

基　　金：国家自然科学基金资助项目(31271938);海南省自然科学基金资助(512106);中国热带农业科学院环境与植物保护研究所基本科研业务费专项项目资助(2012hzs1J016)

摘　　要：用十六烷基三甲基溴化铵(CTAB)对蒙脱土(MMT)进行改性后,与壳聚糖(CS)复合制备壳聚糖/蒙脱土(CS/MMT)复合保鲜膜。通过XRD、FTIR、SEM表征复合膜的结构,并研究了复合膜的拉伸性能和热性能。研究结果表明,随着CTAB用量增大,复合膜的拉伸强度逐渐增大,在CTAB/MMT(w/w)为0.6时拉伸强度达到最大值。XRD和SEM分析证明:CTAB能使MMT层间距增大,改善了MMT在CS中的分散性。采用CTAB改性后,MMT能与CS复合形成插层结构,有效提高了CS/MMT复合膜的拉伸性能。Montmorillonite （MMT）were modified by cetyl trimethyl ammonium bromide（CTAB）, then, chitosan/ montmorillonite（CS/MMT） composite food preservative films were prepared using chitosan and modified MMT.The tensile properties, thermal performance were measured.The materials were characterized by XRD, FTIR and SEM.The results showed that with the dosage of CTAB increase,the tensile strength of the composite membrane increased gradually.The maximum tensile strength was obtained when the dosage of CTAB/MMT （w/w） was 0.6,XRD indicated that with the increase of the dosage of modifier the interlayer spacing increased.SEM showed that CTAB could improve the dispersing ability of MMT in CS.After the modification with CTAB, CS/MMT composite formed the layer structure.The tensile properties of the CS/MMT composite films increased significantly.

关 键 词：壳聚糖 保鲜膜 蒙脱土 十六烷基三甲基溴化铵 

分 类 号：TS206.4[轻工技术与工程—食品科学]