The adsorption behavior of polycarboxylate-based (PCE) superplasticizer at the solid-liquid interface is a basic problem in the research and application of admixtures. At present, the research on this problem is still at the stage of macroscopic experiments and "apparent" adsorption data. There is a lack of accurate and unified understanding on the physical and chemical principles behind PCE adsorption. This paper aims to summarize up-to-date research results on the theory of PCE adsorption, and elaborates on the main three aspects of PCE adsorption: (1) conformation, (2) adsorption free energy, and (3) adsorption kinetics. Meanwhile, the applicable conditions and limitations of existing theoretical models are analyzed. The new theoretical perspectives include a binary-structure model describing the equilibrium adsorption conformation, a scale theory describing the adsorption free energy, and the random sequential adsorption (RSA) model describing the adsorption kinetics.
|Translated title of the contribution||Advances in adsorption theory of polycarboxylate superplasticizers at solid-liquid interface|
|Number of pages||13|
|Publication status||Published - Apr 2018|