羧甲基葡甘聚糖/大豆分离蛋白复合膜的制备及表征

Preparation and characterization of carboxyl methyl glucomannan/isolated soy protein compound membranes

以溶液共混法制备羧甲基葡甘聚糖/大豆分离蛋白复合物。正交实验确定了羧甲基葡甘聚糖与大豆分离蛋白质量比为1.5∶1、pH10、6mL/100g干粉质量的三氯氧磷作用下,40℃水浴反应3h,羧甲基葡甘聚糖与大豆分离蛋白有良好的相互作用,复合膜的力学性能、抗潮性能及阻气性能均有明显提高,其中拉伸强度较羧甲基葡甘聚糖提高了117.6%,吸湿增重较羧甲基葡甘聚糖下降了19.02%,透湿系数降至6.7g/mm·h·Pa,用红外光谱、Tg测定表征了其结构。

Carboxyl methyl glucomannan/soy protein isolated compound were prepared by solution method. The orthogonal design indicated that there was some strong interaction between carboxyl methyl glucomannan and soy protein isolated when the conditions were as follow： M（carboxyl methyl glucomannan）： M（soy protein isolated）=1.5：1, pH10. 6 mL phosphorus oxychloride/100 g dry powder, at 40 ℃ and 3 hours reaction. The properties of tensile strength, moisture resistance and gas barrier of the compound membranes were increased greatly. The best tensile strength increased by 117.6% to CMKGM. The moisture absorption increase in weight decreased by 19.02% to CMKGM, and the humidity-penetrate coefficient was descended to 6.7 g/ram, h. Pa, The structure of the compound was characterized by FT-IR, and glass-temperature test.