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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >New Insights into Interactions between Dendrimers and Surfactants. 4. Fast-Exchange/ Slow-Exchange Transitions in the Structure of Dendrimer—Surfactant Aggregates
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New Insights into Interactions between Dendrimers and Surfactants. 4. Fast-Exchange/ Slow-Exchange Transitions in the Structure of Dendrimer—Surfactant Aggregates

机译：树状聚合物与表面活性剂之间相互作用的新见解。 4.树枝状大分子-表面活性剂聚集体结构中的快速交换/缓慢交换转变

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摘要

The interactions between poly(amidoamine) (PAMAM) dendrimer and surfactant (sodium dodecyl sulfate, SDS) in aqueous solutions were investigated by a combination of ~1H NMR, diffusion measurements (PFG NMR), and NOE techniques. The diffusion studies suggested that different types of dendrimer—surfactant aggregates are formed by varying surfactant concentrations in the dendrimer solution. The ~1H NMR analysis proved that the presence of fast-exchange/slow-exchange transitions in the dendrimer—surfactant aggregates. The supramolecular structure of the aggregate was based on the hydrophobic interactions between the dendrimer scaffold and the surfactant aliphatic chain, as well as electrostatic/hydrogen-bond interactions between dendrimers and SDS monomers, bilayers, or globular micelles. In comparison with previous investigations, the present study provides a new insight into interactions between dendrimers and surfactants, which may be helpful for the design of dendrimer-based microreactors or nanovehicles.
机译：通过〜1H NMR，扩散测量（PFG NMR）和NOE技术的组合研究了水溶液中聚（酰胺基胺）（PAMAM）树状聚合物与表面活性剂（十二烷基硫酸钠，SDS）之间的相互作用。扩散研究表明，通过改变树枝状聚合物溶液中表面活性剂的浓度，可以形成不同类型的树枝状聚合物-表面活性剂聚集体。 〜1 H NMR分析证明，树枝状聚合物-表面活性剂聚集体中存在快速交换/缓慢交换的过渡。聚集体的超分子结构基于树枝状聚合物支架和表面活性剂脂族链之间的疏水相互作用，以及树枝状聚合物与SDS单体，双层或球状胶束之间的静电/氢键相互作用。与以前的研究相比，本研究为树状聚合物与表面活性剂之间的相互作用提供了新的见解，这可能有助于设计基于树状聚合物的微反应器或纳米载体。

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