环境湿度对明胶-普鲁兰多糖可食性膜性能的影响
2012-09-12高丹丹赵晓燕江连洲
张 超,高丹丹,马 越,王 丹,赵晓燕,*,江连洲
(1.北京市农林科学院蔬菜研究中心、农业部华北地区园艺作物生物学与种质创制重点实验室、农业部都市农业(北方)重点实验室,北京 100097;2.东北农业大学,黑龙江哈尔滨 150030)
环境湿度对明胶-普鲁兰多糖可食性膜性能的影响
张 超1,高丹丹2,马 越1,王 丹1,赵晓燕1,*,江连洲2
(1.北京市农林科学院蔬菜研究中心、农业部华北地区园艺作物生物学与种质创制重点实验室、农业部都市农业(北方)重点实验室,北京 100097;2.东北农业大学,黑龙江哈尔滨 150030)
明胶-普鲁兰多糖膜是一种可以快速溶解于热水的可食性包装材料,研究环境湿度对明胶-普鲁兰多糖膜机械性能、氧气透过率、水蒸气透过率、油脂透过率、颜色以及水溶性的影响,并比较环境湿度对明胶膜、明胶-普鲁兰多糖膜和普鲁兰多糖膜性能的影响。结果显示,较高的环境湿度(80%)会降低明胶-普鲁兰多糖膜的抗拉强度,提高其柔韧性,而对其阻氧性、阻油性和透明度没有显著的影响;明胶-普鲁兰多糖膜的各方面性能优于明胶膜和普鲁兰多糖膜。
明胶,普鲁兰多糖,可食性膜,环境湿度
Abstract:Gelatin-pullulan-based film is a water-soluble package material.The effect of relative humidity on mechanical properties,water-vapor transmission ratio,oxygen transmission ratio,oil transmission ratio,color and water solubility of gelatin-pullulan-based film were evaluated,and the effect of relative humidity on properties of gelatin-pullulan-based film,gelatin film and pullulan film were compared.The relative humidity of 80%lowered the tensile strength of gelatin-pullulan-based film,improved its flexibility,and showed no significant different on its oxygen resistance,oil resistance and transparency.The properties of gelatin-pullulanbased film were better than that of gelatin film and pullulan film in the same relative humidity.
Key words:gelatin;pullulan;edible film;relative humidity
明胶和普鲁兰多糖是生产可食性包装材料的优良材料,研究发现明胶可食性膜抗拉强度较高,成本低廉[1-2],普鲁兰多糖可食性膜具有透明度高、阻油、阻氧性好等特点[3-6],明胶-普鲁兰多糖复合膜将可能具有上述两种优点。张芸[7]以普鲁兰多糖、明胶和壳聚糖作为涂膜材料对草莓进行涂层,结果发现,复合涂膜对草莓的保鲜效果较好。……
