Fabrication and surface properties of hydrophobic barium sulfate aggregates based on sodium cocoate modification
Source abstract
Abstract
Abstract Hydrophobic barium sulfate aggregates were fabricated by the direction of cocoate anions. At 30 °C, when the weight ratio of sodium cocoate to BaSO 4 particles was 2.0 wt.%, the active ratio of the product reached 99.43% and the contact angle was greater than 120°. This method could not only simplify the complex modification process, but reduce energy consumption. The surface morphology, chemical structure and composition of BaSO 4 aggregates were characterized by SEM, XRD, and FTIR. The results indicated that the as-synthesized BaSO 4 particles were almond-liked and were composed of many interconnected nanoballs and that their surfaces were affected by cocoate anions. The adsorption of cocoate anions reversed the charge and weakened the surface polarity of BaSO 4 particles, driving the formation of aggregates. And cocoate anions induced a change of the BaSO 4 particles surface from hydrophilic to hydrophobic by a self-assembly and transformation process. Due to the self-assembled structure and the surface hydrophobicity, when adding the hydrophobic BaSO 4 into PVC, the mechanical properties of PVC composite materials were significantly improved.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Surface Modification and Superhydrophobicity · Hydrogels: synthesis, properties, applications · Aerogels and thermal insulation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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