Journal
CEMENT AND CONCRETE RESEARCH
Volume 151, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2021.106523
Keywords
Competitive adsorption; Polycarboxylate ethers; Admixtures; Thermodynamics; Polymers
Funding
- SNF project [172481]
Ask authors/readers for more resources
This study introduces a method to demonstrate competitive adsorption between polycarboxylate ether (PCE) molecules of different molecular structures. By analyzing a fundamental thermodynamic model, the research reveals the impact of dispersity in charge and backbone length on the adsorption behavior of PCEs, contributing to a deeper understanding of the molecular-level working mechanism of PCEs.
This study presents a method that establishes the existence of competitive adsorption between polycarboxylate ether (PCE) molecules with different molecular architecture. By combining well-established total organic carbon measurements with UV-Visible absorption, competition between PCEs of different structures could be quantified. Results are interpreted by deriving a fundamental thermodynamic model describing the PCE competition as a dynamic equilibrium between adsorbed and dissolved PCE molecules with different architectures. The model rationalizes the effect of dispersity in charge and backbone length on the adsorption behavior of PCEs and contributes to a fundamental understanding of the PCE working mechanism on the molecular level.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available