Preparation of polymeric function film with different wettability
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A new method named polymer plating was developed for surface modification of stainless steel plates with different functional groups of organic solutions.The polymer-plated films on the surface of stainless steel plates were characterized by Fourier transform infrared spectra,contact angle and surface free energy.Compared with untreated stainless steel plate,the surface polymer-plated by TTN possessed hydrophilic characteristic with higher surface free energy and lower contact angle of distilled water,however,the polymer-plated films by DHN and AF17N had hydrophobic feature with lower surface free energy and higher contact angle of distilled water,where AF17N polymer-plated surface obtained optimal hydrophobicity because of the lowest surface free energy and the highest contact angles.This technique achieved the hydrophilic/hydrophobic modification on surface of stainless steel,and provided a method for fabricating polymeric function film with different wettability.Keywords:
Distilled water
Surface Modification
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Perfluorocarbon thin films and polymer brushes were formed on stainless steel 316 L (SS316L) to control the surface properties of the metal oxide. Substrates modified with the films were characterized using diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), contact angle analysis, atomic force microscopy (AFM), and cyclic voltammetry (CV). Perfluorooctadecanoic acid (PFOA) was used to form thin films by self-assembly on the surface of SS316L. Polypentafluorostyrene (PFS) polymer brushes were formed by surface-initiated polymerization using SAMs of 16-phosphonohexadecanoic acid (COOH-PA) as the base. PFOA and PFS were effective in significantly reducing the surface energy and thus the interfacial wetting properties of SS316L. The SS316L control exhibited a surface energy of 38 mN/m compared to PFOA and PFS modifications, which had surface energies of 22 and 24 mN/m, respectively. PFOA thin films were more effective in reducing the surface energy of the SS316L compared to PFS polymer brushes. This is attributed to the ordered PFOA film presenting aligned CF3 terminal groups. However, PFS polymer brushes were more effective in providing corrosion protection. These low-energy surfaces could be used to provide a hydrophobic barrier that inhibits the corrosion of the SS316L metal oxide surface.
Polymer brush
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Carbon steel
Surface Modification
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Erratum: Roihatur Rohmah, M. Zainuri. Jurnal Neutrino:Jurnal Fisika dan Aplikasinya. 2020 April: 12(2):49-56. (Doi: 10.18860/neu.v12i2.8208: The title "The Influence of Silica Calcination Temperature Variation to The Hydrophobicity and Transmittance on Glass Substrate" was deleted because it is the same as the author's thesis.Therefore, the title was replaced with "Study of Hydrophobic Surface by Silica Calcination Temperature Variation."
Variation (astronomy)
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Water repellent
Dip-coating
Superhydrophobic coating
Hydrophobic silica
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In this study, the SiO polymer coating film was prepared the containing tetraethyl orthosilane (TEOS) solution by the sol-gel method on soda lime glass. After then, the plasma polymer coating was deposited on SiO polymer coated glass by plasma enhanced chemical vapor deposition (PECVD) method at room temperature during 15 seconds. The thiophene monomer was used as organic precursor. It was heat up to 60 oC and bubbled with hydrogen gas which flow rate was 50 sccm. Plasma was ignited by radio frequency (RF, 13.56 MHz) and its power was 10 W. SiO polymer and plasma polymer coated SiO polymer films were investigated by Fourier Transform Infrared (FT-IR), scanning electron microscopy (SEM), ultraviolet-visible (UV-Vis.), water contact angle, the adhesion test, and the pencil hardness test. The IR spectra shows evidence of very thin organic plasma polymer, which could not be measured by SEM cross image. The SEM images show that the morphology of each film was not changed by plasma polymer coating. Low water contact angles showed with both coating. Moreover surface hardness was increased by plasma polymer coating.
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Abstract Facile surface modification of polyester films was performed via chemical solutions treatment. Surface hydrolysis was carried out by means of sodium hydroxide solutions, leading to the formation of carboxylate groups. Three commercial polyester films of 100 μm in thickness were used in this work: AryLite™, Mylar™, and Teonex™, hydrolysis time being the main modification parameter. FTIR-ATR analysis, topography and contact angle (CA) measurements, surface free energy (SFE) and T-Peel adhesion tests were carried out to characterize the modified films. A quantitative estimate of the carboxylates surface coverage as a function of treatment time was obtained through a supramolecular approach, i.e. the ionic self-assembly of a tetracationic porphyrin chromophore onto the film surface. The surface free energy and critical surface tension of the hydrolyzed polyesters was evaluated by means of Zisman, Saito, Berthelot and Owens-Wendt methods. It was shown that NaOH solution treatment increases roughness, polarity and surface free energy of polymers. As a result, T-Peel strengths for modified Mylar™ and Teonex™ films were respectively 2.2 and 1.8 times higher than that for the unmodified films, whereas AryLite™ adhesion test failed.
Surface Modification
Carboxylate
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In this work,the micro-structure and surface modification of sol-gel silica film were studied,for obtaining hydrophobic coatings with high transparency.Polyethylene glycol(PEG) was added into silica sol to adjust the particle size.Two kinds of surface modification(sol treatment and film treatment respectively) by hexamethyldisilazane(HMDS) were employed and compared.The particle size evolvement was measured by dynamic scattering particle size analyzer.The surface morphology,water contact angle,chemical compositions,and transmittance were characterized by atomic force microscope(AFM),contact angle instrument,transmittance,FTIR and UV-Vis-IR spectrophotometers.Results showed that addition of PEG increased the silica particle size and accordingly the film surface roughness,which gave rise to a significantly improved hydrophobicity.The surface modification was impacted by the particle size.Small particle size is good for sol treatment,while large particle size is good for film treatment.PEG-film after HMDS atmosphere treatment could present superhydrophobicity with water contact angle of 152°,and high transmittance was maintained at the same time.
Surface Modification
Particle (ecology)
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