盐浓度与海藻酸钠/磷虾蛋白复合体系性能的相关性

采用湿法纺丝技术制备了海藻酸钠/磷虾蛋白(SA/AKP)复合纤维, 通过傅里叶变换红外光谱(FTIR)分析了SA/AKP复合体系的氢键相互作用, 用X射线衍射仪、 流变仪及SEM研究了盐(NaCl)浓度对复合体系的结晶、 流动性和形态结构的影响. 结果表明, SA/AKP复合体系中存在分子内和分子间氢键, 分子间氢键的强度随复合材料中盐浓度的增加而增强. 盐浓度的增加导致SA/AKP复合材料的结晶度增加, 流动黏度先降低后增加, 力学性能先增加后降低. SA/AKP纤维的SEM照片显示结晶的盐与纤维分离, 并且复合纤维表面沟槽结构逐渐减少, 表面更加致密光滑. AKP在SA/AKP复合体系中呈完全取向状态.

Correlativity of Characterization for Sodium Alginate/Antarctic Krill Protein by Salt Concentration†

Sodium alginate/antarctic krill protein composite material(SA/AKP) was obtained by wet spinning. The hydrogen bonds of SA/AKP composite material were analyzed by Fourier transform infrared spectroscopy(FTIR), the effects of salt concentration on the crystallinity, fluidity and morphology of the composite material were studied by XRD, rheometer and SEM. Experiment manifested the existence of intramolecular and intermolecular hydrogen bonds in SA/AKP system. The strength of intermolecular hydrogen bonds was enhanced with the increase of NaCl in the composite material. At the same time, the increase of salt concentration led to SA/AKP composite material’s crystallinity increasing, the rheological properties decreasing at first and then increasing, and mechanical properties increasing at first and then decreasing. SA/AKP fiber SEM images showed that crystallized salt was separated from the fiber, and the surface structure of the composite fiber gradually decreased and became denser and smoother.Finally, AKP was completely oriented in the SA/AKP composite system.