魔芋葡甘聚糖及其与大豆蛋白复合成膜的研究

The film-forming character of konjac glucomannan and konjac glucomannan-soybean protein isolated compound

对单一魔芋葡甘聚糖膜及其与大豆分离蛋白(SPI)复合膜的制备条件优化进行了研究。发现高 pH(>10)对阻隔性能不利,反应温度的提高和增塑剂的加入会分别导致膜的阻氧和阻湿性能下降,而与大豆分离蛋白的复合,则会明显地提高其阻隔特性。pH10、温度45℃、甘油含量1.5%、魔芋与大豆分离蛋白比值1∶1时制备的复合膜具有较好的阻隔性能。

The optimum film-forming conditions of konjac glucomannan and the mixture of konjac glucomannan and SPI were investigated. Films treated at pH higher than 10 gave lower barrier properties. Increased reaction temperature and the addition of plasticizer resulted in increases of oxygen permeability and the value of WVP respectively. An addition of ISP to KGM significantly enhanced the barrier properties of the films. The optimum condition was pH10, 45℃,1.5% of glycerin, and a ratio of KGM to SPI as 1∶1.