pH对大豆分离蛋白-羧甲基纤维素复合材料性能的影响

Effect of pH on properties of soybean proteinisolate-carboxymethyl cellulase composite materials

摘要: 研究pH对大豆分离蛋白-羧甲基纤维素复合材料抗拉强度、光学性能和水蒸气透过率的影响。研究结果显示,当pH为10时,大豆分离蛋白-羧甲基纤维素复合材料的抗拉强度最高,同时具有良好的透光率和紫外线阻隔能力。红外光谱分析显示当pH升高时,复合材料中负电荷数量增加,C-N键的伸缩振动减弱,分子间稳定性提高,是引起复合材料的抗拉强度提高的原因之一。

Abstract: The effect of pH values on the tensile strength,opitical property,and water vapor permeability of soy bean proteinisolate -carboxymethyl cellulose composite materials were evaluated. The composite materials at pH10 showed the highest tensile strength,excellent transparence,and ultraviolet -blocking preformence. The FT-IR showed the strech vibration of C-N was reduced when the pH raised,which was one of the reason for the tensile strength improvement.