【摘要】 对大豆分离蛋白(SPI)分别进行了化学改性和物理改性以提高其韧性。化学改性采用马来酸酐(MA)对SPI进行酰胺化,然后分别采用3氨基1丙醇、1,3丙二醇和1,4丁二醇对酰胺化的SPI进行酯化。采用滴定法测定SPI的酰胺化程度,通过傅里叶变换红外光谱(FTIR)和核磁共振氢谱(1HNMR)证实酯化反应的成功进行。对蛋白质浆料膜的力学性能、浆料溶液的黏度,以及上浆纱线的力学性能、耐磨性和毛羽进行了测试。研究结果表明,经1,4丁二醇酯化改性的蛋白膜的断裂功提高最大,韧性明显改善。物理改性的SPI浆料适用于棉纱的上浆,而化学改性的SPI浆料适用于涤纶等化纤的上浆。更多还原

【Abstract】 Soybean protein isolate(SPI)was chemically and physically modified to improve the toughness.SPI was amidated with maleic anhydride(MA)and esterified with 3-amino-1-propanol,1,3-propylene glycol and 1,4-butanediol respectively.Amidation degree of SPI was determined by titration,and the success of esterification was confirmed by Fourier transform infrared spectrum(FTIR)and 1 hydrogen-nuclear magnetic resonance(1 H-NMR).Mechanical properties of protein sizing film,viscosity of sizing solution,and mechanical properties,wear resistance and hairiness of sizing yarn were tested.The results showed that 1,4-butanediol esterification modified protein film had increased greatly in fracture work,and its toughness improved significantly.Physical modified SPI sizing agent was suitable for sizing of cotton yarn,while chemical modified SPI sizing agent was suitable for sizing of polyester and other chemical fibers.更多还原