聚电解质复合物溶解性研究

报道了聚电解质复合物的一种新的溶剂体系———离子表面活性剂剂的水溶液 ,研究了表面活性的用量及结构、温度、外加小分子电解质对复合物溶解性的影响 ,初步探讨了溶解机理 ,通过扫描电镜观察了复合物溶解后在溶液中的形态 .研究表明 ,当复合物与离子表面活性剂定量结合到一定程度时 ,就会使复合物发生溶解 .表面活性剂碳链长度的增加、温度的提高均会对复合物的溶解有不同程度的促进 .加入少量的无机电解质如氯化钠 ,会促进复合物的溶解 ,若氯化钠加入量过多 ,反而不利于复合物的溶解 .复合物的溶解机理被认为是表面活性剂的解离作用和疏水作用二者的协同 .

STUDY ON DISSOLVING PROPERTIES OF POLYELECTROLYTE COMPLEX

The dissolving properties of polyelectrolyte complex (PEC) in a new solvent system,an aqueous solution of ionic surfactant,were studied.The effect of the structure and content of the surfactant,temperature and the inorganic electrolyte added in the solution was investigated.The morphology of PEC dissolved in the aqueous solution was studied by using SEM technique.It was found that the increase of temperature and the carbon chain length of the ionic surfactant may promote the dissolving of PEC,and the addition of a small amount of inorganic electrolyte such as sodium chloride is also beneficial to the dissolving of PEC.It is supposed that the dissolving mechanism of PEC is the cooperating results of the dissociation function and the hydrophobic action of the ionic surfactant.