【摘要】 研究了十二烷基硫酸钠 (SDS)、二十烷基苯磺酸钠 (SDBS)、溴化十六烷基吡啶翁 (CPB)和IgepalCA - 72 0等表面活性剂与胶原 (来源于牛跟腱 )间的相互作用。发现了不同的反应条件下 ,上述离子性表面活性剂的吸附等温线 ,得到了适当条件下的吸附等温线 ,同时发现在等电条件下等温线呈对数关系 ,Igepal没有吸附。表面活性剂与胶原的作用情况与其质量的变化是相互关联的 ,这种变化取决于反应条件 ,即pH值和反应溶液中的离子强度 ,胶原的膨胀程度 (am)被用来描述这种变化。在pH3 0 ,无SDBS存在且在低的离子强度下 ,胶原得到了大的膨胀 :加入SDBS将会导致强烈的消肿作用 ,并且当胶原对SDBS的结合量达到 1mmol/ g时 ,am 的值将不再随SDBS结合量的进一步增加而变化。在高的离子强度下 ,am 与SDBS的平衡吸附量无关 ;在等电条件下am 的变化明显小于在酸性条件下的变化 ,两种条件下am 具有相反的特点。更多还原

【Abstract】 Interactions of collagen fibres (made from Beef Achilles tendons )with sodium dodecyl sulfate (SDS),sodium dodecylbenzene sulfonate (SDBS),cetylpyridinium bromide(CPB)and Igepal CA-720 were studied.Sorptions isotherms of all ionic surfactants under different reaction conditions were found out.At suitable conditions S-isotherms were obtained,while under isoeletric conditions isotherms were logaritmic.Igepal had no sorption.The interaction of surfactants with collagen is connected with its mass changes. Changes depend on reaction conditions,namely pH and ionic strenght of reaction solution.Degree of swelling(α m)was used for the description of these changes.At pH=3,in absence SDBS and under low ionic strenghts,a high swelling was attained.An addition of SDBS to reaction mixture led to vigerous deswelling and when the bound amount of SDBS reached about 1 mmol.g -1 α m became independent on a futher bound SDBS.With higher ionic strenghts α m was independent on the equilibrium bound amount of SDBS.Under isoeletric conditions changes of α m were markedly smaller than in acid region and had the opposite character.更多还原