有机改性蒙脱土对改性淀粉复合膜性能的影响  

Effects of Organically Modified Montmorillonites on Properties of Modified Starch Composites Film

作　　者：高玉玲[1] 代养勇[1] 张慧[1] 董海洲[1] 侯汉学[1] 

机构地区：[1]山东农业大学食品科学与工程学院,泰安271018

出　　处：《中国粮油学报》2015年第6期37-42,共6页Journal of the Chinese Cereals and Oils Association

基　　金：国家自然科学基金(31371747);国家科技支撑计划(2013BAD18B10-3);山东省自然科学基金(ZR2012CM016)

摘　　要：为了获得高性能的淀粉/蒙脱土纳米复合材料,选取3种改性淀粉为成膜基材,3种有机改性蒙脱土(OMMT)为增强剂,采用溶液流延法制备了复合膜。X-射线衍射说明改性剂和淀粉分子进入蒙脱土片层间发生插层反应。红外光谱结果表明双十八烷基二甲基氯化铵改性蒙脱土(D1821MMT)与氧化酯化淀粉(OAS)、深度氧化淀粉(HOS)具有较强的氢键作用;而十八烷基二甲基苄基氯化铵改性蒙脱土(1827MMT)与羟丙基交联淀粉(HPDSP)存在较强的氢键作用。OAS/D1821MMT复合膜具有较高的抗拉强度(5.80 MPa)和透光率(86.83%);HOS/1827MMT复合膜具有较高的断裂伸长率;HPDSP/1831MMT复合膜水蒸气渗透系数最低(1.30×10-10g·m·m-2·s-1·Pa-1)。研究证实,OMMT与改性淀粉能够形成性能更加优良的纳米复合膜,该膜在食品包装领域具有广泛应用前景。Three modified starch nanocomposite films enhanced with three organically modified montmorillonites （OMMTs） were prepared by solution casting in order to obtain high performance starch/clay nanocomposites. X-ray diffraction （XRD） patterns indicated that modifiers and starch molecules entered into the silicate interlayers and formed intercalation structure. Fourier transform infrared （FTIR） spectra exhibited that stronger hydrogen bonding interactions existed between the OMMT modified by dioctadecyl dimethyl ammonium chloride （D1821MMT） and oxidized and acetylated starch （OAS） or high-oxidized starch （HOS）. Stronger hydrogen bonding interactions also occurred between the OMMT modified by octadecyl dimethyl benzyl ammonium chloride （1827MMT） and hydroxypropyl distarch phosphate （HPDSP）. The OAS/D1821MMT composite film had a higher tensile strength （TS, 5.80 MPa）and light transmission （86.83%）. The HOS/1827MMT composite film exhibited a higher elongation at break. The HPDSP/1831MMT composite film showed the lowest water vapor permeability （WVP, 1.30×10^-10 g·m·m^-2·s^-1·Pa^-1）. This study demonstrated that high performance starch/clay nanocomposite film can be obtained from OMMTs and modified starches. The starch nanocomposite film is promising material in the field of food packaging industry.

关 键 词：改性蒙脱土 改性淀粉 淀粉纳米复合膜 性能 

分 类 号：TS236.9[轻工技术与工程—粮食、油脂及植物蛋白工程]