The structures arising in mixed colloidal solutions of anionic surfactant dodecylbenzenesulfonic acid (DBSA) and neutral poly(ethylene glycol) (PEG) polymer in water for a wide range of concentrations and different molecular masses of the polymer were studied by small-angle neutron scattering (SANS) and dynamic light scattering (DLS). The micellization behavior of the system near the critical micelle concentration was characterized by fluorescence spectroscopy and measurements of the surface tension of the solutions. The assumption of the coexistence of free micelles, surfactant-polymer complexes in the form of a necklace structure, and polymer coils was confirmed by DLS and SANS. The typical sizes of micelles and complexes were estimated. It was found that there is an impact of PEG molecular mass on the ability of multi-micelle complex formation. The obtained results are important in particular for the PEGylation of magnetic nanoparticles in sterically stabilized aqueous ferrofluids.

通过小角度中子散射研究了阴离子表面活性剂十二烷基苯磺酸（DBSA）和中性聚乙二醇（PEG）聚合物在胶体溶液中产生的各种浓度和不同分子量的混合溶液的结构SANS）和动态光散射（DLS）。通过荧光光谱和溶液表面张力的测量来表征接近临界胶束浓度的系统的胶束行为。DLS和SANS证实了游离胶束，项链结构形式的表面活性剂-聚合物复合物和聚合物线圈共存的假设。估计了胶束和复合物的典型尺寸。发现PEG分子量对多胶束复合物形成能力有影响。