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研究了大豆分离蛋白的主要组分7S和11S球蛋白对其材料力学性能的影响,并采用十二烷基磺酸钠-聚丙烯酰胺凝胶电泳仪(SDS-PAGE)和电子扫描显微镜(SEM)分析表征了大豆蛋白可生物降解材料的组成和微观结构。结果表明:随着球蛋白11S/7S的增大,大豆蛋白材料的拉伸强度先升高后降低,其断裂伸长率先降低后升高,比值为1时,材料的拉伸强度达到最高。综合材料的性能测试与结构表征,大豆蛋白在形成材料时,7S和11S球蛋白之间存在着交联相互作用。
The effects of 7S and 11S globulin, the main components of soy protein isolate, on the mechanical properties of the materials were studied. The effects of sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and scanning electron microscopy ) Analysis characterizes the composition and microstructure of soy protein biodegradable materials. The results showed that with the increase of globulin 11S / 7S, the tensile strength of soybean protein material first increased and then decreased, and the elongation at break decreased first and then increased. When the ratio was 1, the tensile strength of the material reached the highest. Performance tests and structural characterization of composite materials show that there is a cross-linking interaction between 7S and 11S globulins when forming soy protein.