Structure and properties of soy protein/poly(butylene succinate) blends with improved compatibility.
Structure and properties of soy protein/poly(butylene succinate) blends with improved compatibility.
复制标题
DOI：
10.1021/bm800745p
复制
发表时间：
2008-10
影响因子：
6.2
通讯作者：
Yi-dong Li;J. Zeng;Xiu-li Wang;Ke‐Ke Yang;Yu-Zhong Wang
中科院分区：
文献类型：
--
作者：
Yi-dong Li;J. Zeng;Xiu-li Wang;Ke‐Ke Yang;Yu-Zhong Wang
将大豆分离蛋白(SPI)与聚丁二酸丁二醇酯(PBS)共混，制得了一种新型环保型热塑性大豆蛋白/聚酯共混物。为了改善SPI与PBS的相容性，在共混前引入不同量的氨基甲酸酯和异氰酸酯基团对聚酯进行前处理。由于聚酯在蛋白质中的良好分散性，经PBS处理后的共混物具有更细小的相结构。结果表明，共混物的拉伸强度和弹性模量明显提高。用动态力学分析仪(DMA)观察到共混物中蛋白质的玻璃化转变温度低于纯SPI，这是由于两相间相容性的改善所致。由于PBS的加入，共混物的疏水性、耐水性和在不同湿度下的吸湿性都得到了显著的改善。
A novel environmentally friendly thermoplastic soy protein/polyester blend was successfully prepared by blending soy protein isolate (SPI) with poly(butylene succinate) (PBS). To improve the compatibility between SPI and PBS, the polyester was pretreated by introducing different amounts of urethane and isocyanate groups before blending. The blends containing pretreated PBS showed much finer phase structures because of good dispersion of polyester in protein. Consequently, the tensile strength and modulus of blends increased obviously. A lower glass transition temperature of protein in the blends than that of the pure SPI, which was caused by the improvement of the compatibility between two phases, was observed by dynamic mechanical analyzer (DMA). The hydrophobicity, water resistance, and moisture absorption at different humidities of the blends were modified significantly due to the incorporation of PBS.