Otoni Caio G, Queirós Marcos V A, Sabadini Julia B, Rojas Orlando J, Loh Watson
Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas, SP 13083-970, Brazil.
Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, Espoo FI-00076, Finland.
ACS Omega. 2020 Jan 10;5(3):1296-1304. doi: 10.1021/acsomega.9b03690. eCollection 2020 Jan 28.
We report on electrostatically complexed materials bearing advanced functions that are not possible for other assemblies. The fundamentals of electrostatic association between oppositely charged polyelectrolytes and colloidal particles are introduced together with the conditions needed for complexation, including those related to ionic strength, pH, and hydration. Related considerations allow us to control the properties of the formed complexes and to develop features such as self-healing and underwater adhesion. In contrast to assemblies produced by typical hydrophobic and chemical interactions, electrostatic complexation leads to reversible systems. A state-of-the-art account of the field of electrostatically complexed materials is provided, including those formed from biomolecules and for salt-controlled rheology, underwater adhesiveness, and interfacial spinning. Finally, we present an outlook of electrostatic complexation from the colloidal chemistry perspective.
我们报道了具有先进功能的静电复合材料，这些功能是其他组装体所无法实现的。介绍了带相反电荷的聚电解质与胶体颗粒之间静电缔合的基本原理以及复合所需的条件，包括与离子强度、pH值和水合作用相关的条件。相关的考虑因素使我们能够控制所形成复合物的性质，并开发出自修复和水下粘附等特性。与典型的疏水和化学相互作用产生的组装体不同，静电复合导致形成可逆体系。本文提供了静电复合材料领域的最新进展，包括由生物分子形成的材料以及用于盐控流变学、水下粘附性和界面纺丝的材料。最后，我们从胶体化学的角度对静电复合进行了展望。
