多重改性大豆分离蛋白可降解材料性能研究

Study on Properties of Multiple Modifed Soy Protein Isolate Biodegradable Material

大豆分离蛋白(SPI)经四氢呋喃、乙酸锌、顺丁烯二酸酐多重改性后,用水和甘油增塑,然后经热压制得力学性能和抗水性能良好的可生物降解材料。研究了四氢呋喃、乙酸锌、顺丁烯二酸酐用量对SPI可生物降解材料力学性能、抗水性能的影响。结果表明:当改性剂四氢呋喃、乙酸锌、顺丁烯二酸酐的用量分别为大豆分离蛋白的267%、7%和15%时,SPI可降解材料的性能最佳,其断裂伸长率、拉伸强度、吸水率和耐水指数分别为187.12%、9.29 MPa、30.9%和0.48。

In this paper, soy protein isolate （SPI） was modified by tetrahydrofuran, zinc acetate and maleic anhydride. And a kind of biodegradable material with good mechanical properties and water resistance property was obtained from the mixture of the modified SPI, glycerol and water. The effects of tetrahydrofuran, zinc acetate and maleic anhydride content on the mechanical properties and water resistance of the SPI biodegradable material were studied. The results indicate that the optimal content of tetrahydrofuran, zinc acetate and maleic anhydride are 267%, 7% and 15% respectively, and the elongation at break, tensile strength, water absorption and water tolerance index of the SPI biodegradable material are 187.12%, 9.29 MPa, 30.9% and 0.48 respectively.