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Mixed micellization of dimeric surfactant-amphiphilic drug systems: effect of surfactant structure

机译:二聚体表面活性剂 - 两亲药物系统的混合胶束:表面活性剂结构的作用

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摘要

In order to explore their applications as drug delivery vehicles, the mixed interfacial/micellar behaviour of a number of dimeric surfactants (zwitterionic, cocogem and anionic) with an amphiphilic antidepressant drug imipramine hydrochloride (IMP) in aqueous solutions has been investigated. The cmc values of mixed surfactants, estimated from surface tension measurements, decrease with mole fraction (alpha) and tail length of the surfactants. The values in most of the cases are lower than cmc(id). This indicates that mixed micelles are formed due to attractive interactions among the components. A number of simple models (those of Rosen, Rubingh, Motomura) that combine pseudophase approximation with the regular solution theory, have been used to estimate some important physicochemical parameters needed for such applications (like compositions of mixed monolayers (X-s)/mixed micelles (X-m) and the interaction parameters (beta)). The values of the micellar interaction parameter (beta(m)) come out to be negative with the magnitude order being: anionic dimerics > zwitterionic dimerics > cocogems. This is explained in light of the different structures of surfactants; IMP is positively charged and with anionic surfactants it experiences stronger attractive interactions while with cocogems its interactions are weak. With zwitterionic dimerics, the drug experiences intermediate interactions.
机译:为了探讨其作为药物递送载体的应用,已经研究了许多二聚体表面活性剂(两亲离子,可卡因和阴离子)的混合界面/胶束行为,其在水溶液中具有两亲抗抑郁药物脂盐酸盐(Imp)。混合表面活性剂的CMC值,从表面张力测量估计,随着表面活性剂的摩尔分数(α)和尾长而降低。大多数情况下的值低于CMC(ID)。这表明由于组分之间具有吸引性的相互作用,形成混合胶束。结合常规解决方案理论的假阶段近似的许多简单模型(Rosen,Rubingh,Motomura)已被用于估计这些应用所需的一些重要的物理化学参数(类似于混合单层(Xs)/混合胶束的组合物( XM)和交互参数(Beta))。胶束相互作用参数(β())的值出现为阴性,幅度顺序为:阴离子二聚体>两倍二聚体>可卡球。这是根据表面活性剂的不同结构解释的; IMP是带正电荷和阴离子表面活性剂,它经历了更强烈的有吸引力的相互作用,同时通过CocoGems互动弱。用两倍二聚体,药物经历中间相互作用。

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  • 来源
    《RSC Advances》 |2016年第24期|共13页
  • 作者单位

    Aligarh Muslim Univ Dept Chem Aligarh 202002 Uttar Pradesh India;

    Aligarh Muslim Univ Dept Chem Aligarh 202002 Uttar Pradesh India;

    Aligarh Muslim Univ Dept Chem Aligarh 202002 Uttar Pradesh India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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