Effects of Solvent Solubility Parameters on Organoclay Dispersions
Source abstract
Abstract
With Hansen's solubility parameters, δ o 2 = δ d 2 + δ p 2 + δ h 2, the correlation between the degree of exfoliation of organically modified clays and the solvent in which the clay platelets are dispersed/mixed has been analyzed. It has been found that the dispersion force of the solvent, reflected by δ d, is the principal factor determining whether the clay platelets remain suspended in the solvent while the polar (δ p ) and hydrogen-bonding (δ h ) forces affect primarily the tactoid formation/structure of the suspended platelets. The organically modified clays studied in this work precipitated in any solvent with molecules with moderately strong hydrogen-bonding groups. The correlation found has been used to correctly identify a solvent, trichloroethylene, which completely exfoliates the organically modified clay studied in this work.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Polymer Nanocomposites and Properties · Surfactants and Colloidal Systems · Clay minerals and soil interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, and Department of Materials and Nuclear Engineering, University of Maryland, College Park, Maryland 20742
References (30)
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