Guzmán Eduardo, Maestro Armando
Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo de Juan XXIII, 28040 Madrid, Spain.
Polymers (Basel). 2022 Mar 11;14(6):1133. doi: 10.3390/polym14061133.
The assembly of soft colloidal particles at fluid interfaces is reviewed in the present paper, with emphasis on the particular case of microgels formed by cross-linked polymer networks. The dual polymer/colloid character as well as the stimulus responsiveness of microgel particles pose a challenge in their experimental characterization and theoretical description when adsorbed to fluid interfaces. This has led to a controversial and, in some cases, contradictory picture that cannot be rationalized by considering microgels as simple colloids. Therefore, it is necessary to take into consideration the microgel polymer/colloid duality for a physically reliable description of the behavior of the microgel-laden interface. In fact, different aspects related to the above-mentioned duality control the organization of microgels at the fluid interface, and the properties and responsiveness of the obtained microgel-laden interfaces. This works present a critical revision of different physicochemical aspects involving the behavior of individual microgels confined at fluid interfaces, as well as the collective behaviors emerging in dense microgel assemblies.
本文综述了软胶体颗粒在流体界面的组装，重点关注由交联聚合物网络形成的微凝胶的特殊情况。微凝胶颗粒的聚合物/胶体双重特性以及刺激响应性，使其在吸附到流体界面时的实验表征和理论描述面临挑战。这导致了一种有争议的、在某些情况下相互矛盾的情况，将微凝胶视为简单胶体无法对其进行合理的解释。因此，有必要考虑微凝胶的聚合物/胶体二元性，以便对负载微凝胶的界面行为进行物理上可靠的描述。事实上，与上述二元性相关的不同方面控制着微凝胶在流体界面的组织，以及所得负载微凝胶界面的性质和响应性。本文对涉及单个微凝胶在流体界面受限行为的不同物理化学方面，以及密集微凝胶聚集体中出现的集体行为进行了批判性修订。
