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普鲁兰多糖-明胶可食性膜的特性

作  者:
高丹丹;徐学玲;江连洲;张超;马越
单  位:
北京市农林科学院蔬菜研究中心东北农业大学食品学院;北京市农林科学院蔬菜研究中心;西北民族大学生命科学与工程学院;重庆市果树研究所
关键词:
普鲁兰多糖;明胶;可食性膜;氧气透过率;抗拉强度
摘  要:
为了提高可食性膜的透明度和阻隔性,制备一种速溶的普鲁兰多糖-明胶可食性膜。将普鲁兰多糖添加到明胶膜中,普鲁兰多糖和明胶的添加质量比为2∶5(PG2)。在此配比下,普鲁兰多糖-明胶可食性膜的抗拉强度是明胶可食性膜的120%,氧气透过率是明胶可食性膜的1/13。可食性膜PG2中普鲁兰多糖和明胶分子间具有较强的氢键作用,并且此时可食性膜具有较好的相容性,因此使可食性膜PG2抗拉强度增强和氧气透过率降低。可食性膜PG2具有较低的氧气透过率(0.15 mL/(m2·d))、较高的抗拉强度(97.21 MPa)和溶水时间(29.5 s),而且具有不透油和低水蒸气透过率(109.08 g/(m2·d))的性质,因此,可食性膜PG2是适合应用于可食性内包装的材料。
译  名:
Properties of Pullulan-Gelatin Composite Films
作  者:
GAO Dan-dan;XU Xue-ling;JIANG Lian-zhou;ZHANG Chao;MA Yue;ZHAO Xiao-yan;College of Food Science,Northeast Agricultural University;Vegetable Research Center,Beijing Academy of Agricultural and Forestry Sciences;
关键词:
pullulan;;gelatin;;edible film;;oxygen permeability;;tensile strength
摘  要:
A quick dissolvable edible film was prepared with blends of pullulan and gelatin(GEL) showing improved transparency and barrier properties. Pullulan was added into gelatin film with a ratio of pullulan:GEL of 2:5(m/m), forming a composite film named as PG2. The tensile strength of PG2 was 120% of GEL, and PG2 had an oxygen permeability one thirteenth as high as GEL. There was the strongest interaction of hydrogen bonds and the best compatibility between the molecules of pullulan and GEL in PG2, which could explain the improved tensile strength and the reduced oxygen permeability of PG2. PG2 provided low oxygen permeability(0.15 mL/(m2·d)), high tensile strength(97.21 MPa) and short dissolution time(29.5 s). Moreover, it was instant, oiltight and of low water-vapor permeability(109.08 g/(m2·d)). Thus, the prepared edible film of PG2 is suitable for application in edible inner packaging.

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