明胶-十二烷基硫酸钠复配体系表面活性的研究

对明胶－十二烷基硫酸钠(SDS)复配体系,研究了SDS浓度、明胶浓度、明胶种类及分子量对其表面活性的影响。实验结果表明,随着SDS浓度的增加,体系的表面张力降低,并在其变化曲线中有一“平台”区域,同时体系的乳化力增大,其乳化力顺序为纯SDS溶液>水解皮明胶－SDS>水解骨明胶－SDS>骨明胶－SDS>皮明胶－SDS体系;各体系的起泡力及其稳定性亦随之增大。而明胶浓度的增加导致了各明胶－SDS体系表面张力的增大,且明胶浓度对大分子明胶体系的影响较之小分子明胶体系要大;明胶浓度的增加降低了体系的泡沫稳定性;但明胶浓度及其种类、分子量对体系的乳化力影响不大。

Study on gelatin/sodium dodecyl sulfate anionic surfactant complex systems

The effects of sodium dodecyl sulfate(SDS) concentration, gelatin concentration, gelatin kinds and molecular weight in the gelatin SDS systems were characterized by measuring the surface activities of aqueous solutions. The results show that the surface tension decreases with the increase of SDS concentration. There is a "platform" in the surface tension grasp; the emulsifying ability and the foaming capacity increase also, and the sequence of the emulsifying ability is SDS solution>hydrolysized skin gelatin SDS solution>hydrolysized bone gelatin SDS solution> bone gelatin SDS solution > skin gelatin SDS solution; however the increase of gelatin concentration causes the ascend of solutions' surface tension and the decrease of the foaming capacity; yet the gelatin concentration, kinds and molecular weight have a little effect on the emulsifying ability.