Preparation of Polymer-Derived Ceramic Coatings by Dip-Coating

Konegger, Thomas; Tsai, Chen Chih; Bordia, Rajendra K.

doi:10.4028/www.scientific.net/msf.825-826.645

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…A commercially available poly(vinyl)silazane (PSZ; HTT 1800, AZ Electronic Materials, Branchburg, NJ) was used as preceramic polymer. This clear, colorless liquid compound, exhibiting a viscosity of 22 mPa·s at 25°C, can be described by the general formula [–(R–Si–CH 3 )–(NH)–] n , with n = 1–20, and R representing either H (80 mol%) or a cross‐linking active vinyl group (20 mol%). Cross‐linking of the polymer typically starts at temperatures between 180°C and 200°C, whereas the polymer‐to‐ceramic transformation starts between 400°C and 500°C.…”

Section: Methodsmentioning

confidence: 99%

Planar, Polysilazane‐Derived Porous Ceramic Supports for Membrane and Catalysis Applications

2015

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Porous, silicon carbonitride-based ceramic support structures for potential membrane and catalysis applications were generated from a preceramic polysilazane precursor in combination with spherical, ultrahigh-molecular weight polyethylene microparticles through a sacrificial filler approach. A screening evaluation was used for the determination of the impact of both porogen content and porogen size on pore structure, strength, and permeability characteristics of planar specimens. By optimizing both the composition as well as cross-linking parameters, maximum characteristic biaxial flexural strengths of 65 MPa and porosities of 42% were achieved. The evolution of an interconnected, open-pore network during thermal porogen removal and conversion of the preceramic polymer led to air permeabilities in the order of 10−14 m2. The materials were further exposed to long-term heat treatments to demonstrate the stability of properties after 100 h at 800°C in oxidizing, inert, and reducing environments. The determined performance, in combination with the versatile preparation method, illustrates the feasibility of this processing approach for the generation of porous ceramic support structures for applications at elevated temperatures in a variety of fields, including membrane and catalysis science.

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Section: Methodsmentioning

confidence: 99%

Planar, Polysilazane‐Derived Porous Ceramic Supports for Membrane and Catalysis Applications

2015

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“…Most researchers have shifted interest toward utilizing these agro-wastes due to their advantages such as sustainable availability, non-toxicity, lightweight nature, low density, cost-effectiveness and eco-friendliness. Many studies have also applied these kinds of agro-waste in the development or improvement of properties of materials such as supercapacitor separators, reinforcers in concrete, packaging, composites, and catalysts [2][3][4][5][6][7][8][9]. Nevertheless, these agro-waste are effectively applied for environmental mitigation.…”

Section: Introductionmentioning

confidence: 99%

Modification of Agro-wastes Reinforced onto the PET Fabric for Decolorisation of Palm Oil Mill Effluent

Siti Samahani Suradi,

Muhammad Zarif Hazim Kamaruzaman,

Muhammad Izz Zakwan Mohd Dali

et al. 2024

ARAM

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The abundance of agricultural wastes from various industrialized processes has become one of the significant contributors to water pollution, particularly in the color of effluents from industrial-based palm oil mills. Inventively, this research focused on three different agro-wastes: pineapple leaves (PL), rice straw (RS), and empty fruit bunch (EFB) reinforced onto PET fabric composite and its decolorization performances by using palm oil mill final effluent discharged (POME-FED). The calcinated agro wastes/polyvinylidene fluoride (PVDF) reinforced onto the polyethylene terephthalate (PET) fabrics were prepared by using the dip-coating technique and characterized via Scanning Electron Microscopy (SEM-EDS), spectroscopy (FTIR-ATR), turbidity and color of POME-FED. It was found that the calcinated PL/PVDF/Fabric displayed the best performance in the turbidity and decolorization by 12.02 NTU, 760 ADMI, and ~60% color removal efficiency as compared with raw POME-FED (~1800 ADMI). Nevertheless, the decolorization efficiencies of RS/PVDF/Fabric and EFB/PVDF/Fabric had increased by ~37 % and ~49 %, respectively. It shows that the formation of a reinforcing layer on the PET fabric surface has improved the transparency of POME-FED. The SEM micrographs and the change of peaks at regions 1650 cm-1, 1450 cm-1, 1210 cm-1, and 990 cm-1 in composites' spectroscopies demonstrate the different patterns of these calcinated samples are various patterns that impart the strength of the composite fabric surface functionality and hydrophobicity. The reduction of the color value of effluent showed the hydrophobicity of the integrated palm oil waste coated with PET, which enables to trap of the particles in the effluent, thus this composite has potential use in the filtration of water treatment.

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“…In comparison to their polymer counterparts, these membranes have been shown to be stable at high temperatures and pressures and can withstand the corrosive environments that are involved in hydrogen production. Such inorganic membranes are often fabricated by the application of a preceramic silicon-containing polymer film on a mechanically strong porous ceramic substrate and its subsequent pyrolysis. − A uniform polymer film on top of the porous substrate is ideal for the formation of high-quality ceramic membranes. − The dense polymer film deposition methods to date, typically, employ solvent-based techniques, such a slip-casting, spin-coating, , and dip-coating, which use potentially environmentally harmful solvents such as toluene, benzene, and tetrahydrofuran.…”

Section: Introductionmentioning

confidence: 99%

Vapor Deposition of Silicon-Containing Microstructured Polymer Films onto Silicone Oil Substrates

et al. 2021

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In this study, a silicon-containing cross-linked polymer, poly(1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane-co-ethylene glycol diacrylate) (p(V4D4-co-EGDA)), was deposited onto high-viscosity silicone oil using initiated chemical vapor deposition (iCVD). The ratio of the feed flow rate of V4D4 to EGDA was systematically studied, and the chemical composition and morphology of the top and bottom surfaces of the films were analyzed. The films were microstructured, and the porosity and thickness of the films increased with increasing V4D4 content. The top of the film was composed of densely packed and loosely packed microstructured regions. X-ray photoelectron spectroscopy on the top and bottom surfaces of the films showed a heterogeneous chemical composition along the thickness of the film, with higher silicon content on the top surface compared to that on the bottom surface. To the best of our knowledge, this is the first study of iCVD deposition of a silicon-containing polymer film onto silicone oil. The results of this study can be used for the synthesis of polymer precursor films for the fabrication, via pyrolysis, of silicon-based inorganic membranes for use in hydrogen production using silicone oil to prevent infiltration of monomer into the underneath membrane support structure during vapor deposition.

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Preparation of Polymer-Derived Ceramic Coatings by Dip-Coating

Cited by 12 publications

References 20 publications

Planar, Polysilazane‐Derived Porous Ceramic Supports for Membrane and Catalysis Applications

Planar, Polysilazane‐Derived Porous Ceramic Supports for Membrane and Catalysis Applications

Modification of Agro-wastes Reinforced onto the PET Fabric for Decolorisation of Palm Oil Mill Effluent

Vapor Deposition of Silicon-Containing Microstructured Polymer Films onto Silicone Oil Substrates

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