Impact of Molecular Weight on Anti-Bioadhesion Efficiency of PDMS-Based Coatings

Bangoura, Mama Aïssata; Mimeau, David; Balnois, Eric; Réhel, Karine; Azemar, Fabrice; Linossier, Isabelle

doi:10.3390/coatings14010149

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…In the present case the flat polystyrene are surfaces prepared from benzene and chloroform without humidity shows water contact angle (WCA) higher than 90 • (19) . Hence, any roughness on a polystyrene (PS) surface will enhance apparent WCA.…”

Section: Contact Angle Measurementsmentioning

confidence: 82%

Morphological, Optical and Voronoi Polygon Analysis of Breath Figures Prepared on Polymeric Surface

Deokar,

Banpurkar,

Singh

et al. 2024

IJST

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Background/ Objectives: The formation of breath figures over polymers like polystyrene has vast applications in material science for making numerous micro- and nanopatterned functional surfaces. However, the breath figures (BFs) method is a complex phenomenon as the actual formation of structures are many times unpredictable and the nature of structure depends on the type of polymer, solvent, degree of humidity and additives used. The work presented in this paper deals with the study of condensation on the surface of volatile polystyrene polymer solution and their uses for non-wetting using optical and morphological studies along with mathematical model Voronoi polygon analysis using polystyrene and solvent of benzene and chloroform. The growth dynamics of Breath-Figures (BFs) formed due to condensation is presented in brief. Method: Breath Figure (BF) patterns were prepared by two solvents: benzene and chloroform. Different representative values of relative Humidity viz. 60, 70, 80 and 90 % were employed for making BFs. Two different polymer concentrations of 5 and 10 w/v % was used in this study. Findings: The morphology has been statistically analyzed for different parameters like average diameter and their size distribution etc. In case of BFs formed on benzene surface, droplet has average diameter of about 12 µm at 90% humidity but in case of chloroform surface this diameter is about 25 µm at 90% humidity. Voronoi analysis demonstrates simplistic way to qualitatively check the six-fold order and the coordination numbers in BFs. Novelty: The work shows comparative study of BFs patterns using polystyrene on two different solvents with changing humidity. The study shows morphology of the breath patterns is mainly dependent on the polymer concentration, humidity and density of solvents which is a new observation. The study leads to the acquisition of new knowledge on BFs which provides insight important for various applications including biological fields. Keywords: Breathfigures, Voronoi polygon, Polystyrene, Contact angle, Condensation

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Section: Contact Angle Measurementsmentioning

confidence: 82%

Morphological, Optical and Voronoi Polygon Analysis of Breath Figures Prepared on Polymeric Surface

Deokar,

Banpurkar,

Singh

et al. 2024

IJST

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Enhancing properties of PSF membrane via a simple two‐step coating of PDA and PVP for separating oil/water emulsions

Roslan,

Lau,

Mohd Nawi

et al. 2024

J of Chemical Tech & Biotech

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BackgroundHydrophilic modification is a promising method to inhibit fouling formation on ultrafiltration membranes. Many relevant studies have been documented; however, most of these methods are either overly intricate or require costly chemicals, thus constraining their practical utility. In this work, we proposed a straightforward approach to modify a commercial polysulfone ultrafiltration membrane via a two‐step coating process involving polydopamine (PDA) followed by polyvinylpyrrolidone (PVP). The influences of PVP molecular weight and concentration on the surface properties of the membrane were studied for oil/water emulsion treatment.ResultsDespite the fact that the introduction of a PVP layer adversely impacted the pure water permeability of the commercial membrane, its water flux during oil/water emulsion treatment was improved due to its improved antifouling properties, which can be attributed to a lower water contact angle. It was found that increasing the PVP concentration in the coating solution could improve the water flux and oil rejection during the treatment process. This enhancement is attributed to the augmented surface hydrophilicity combined with a reduction in membrane surface pore size. Additionally, the best‐performing PVP‐modified membrane exhibited significantly higher flux recovery rate, with its value for the second and third cycles at 89.4% and 80.4%, respectively, compared to the control membrane, which recorded 80.3% and 73.9%, respectively.ConclusionModifying a membrane surface with PDA/PVP coating has been proven to enhance the surface wettability and antifouling properties significantly. These modifications led to improved oil removal efficiencies, demonstrating superior performance in oil/water emulsion treatment. © 2024 Society of Chemical Industry (SCI).

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Ecofriendly hydrophilic modification of microfiltration membranes using pyrogallol/ε-polylysine

Kim,

Lee,

Park

et al. 2024

Separation and Purification Technology

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Impact of Molecular Weight on Anti-Bioadhesion Efficiency of PDMS-Based Coatings

Cited by 3 publications

References 33 publications

Morphological, Optical and Voronoi Polygon Analysis of Breath Figures Prepared on Polymeric Surface

Morphological, Optical and Voronoi Polygon Analysis of Breath Figures Prepared on Polymeric Surface

Enhancing properties of PSF membrane via a simple two‐step coating of PDA and PVP for separating oil/water emulsions

Ecofriendly hydrophilic modification of microfiltration membranes using pyrogallol/ε-polylysine

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