Kinetics study of CO molecules adsorption on Al2O3/Zeolite composite films prepared by roll-coating method

2020 ◽  
pp. 1-10
Author(s):  
Nastaran Mozaffari ◽  
Niloofar Mozaffari ◽  
S. Mohammad Elahi ◽  
Sergij Vambol ◽  
Viola Vambol ◽  
...  
Keyword(s):  
Composite Films ◽  
Kinetics Study ◽  
Roll Coating ◽  
Coating Method ◽  
Zeolite Composite

A Study on B-Stage CNT / Epoxy Composite Films for Electronic Packaging Applications

2010 ◽  
Vol 654-656 ◽  
pp. 2755-2758 ◽  
Author(s):  
Kyoung Wook Paik ◽  
Seung Hun Han
Keyword(s):  
Electrical Conductivity ◽  
Epoxy Resin ◽  
Electronic Packaging ◽  
Epoxy Composite ◽  
Composite Films ◽  
Dispersion Process ◽  
Roll Coating ◽  
Film Type ◽  
Uniform Dispersion ◽  
Coating Method

Carbon nanotubes (CNTs) have remarkable mechanical strength, electrical conductivity, and thermal conductivity in spite of low density. Recently, CNT / epoxy composite have been widely investigated in terms of fabrication process and material characterizations. However, there have been few previous studies on B-stage film type CNT / epoxy composites for electronic packaging applications. B-stage film type CNT / epoxy composite films were fabricated and their properties were characterized for electronic packaging applications. The most important issue on fabrication on B-stage epoxy based films were uniform dispersion of CNTs in an epoxy resin. In this study, using optimized dispersion process, CNT / epoxy films were coated on a releasing film and subsequently dried by the comma roll coating method. Curing behavior of B-stage films, mechanical properties and electrical properties of fully cured films were characterized as a function of CNT contents. According to experimental results, CNTs lowered the curing activation energy of epoxy resin and increased electrical conductivity of epoxy resin.

scholarly journals Optical Isomerization and Photo-Patternable Properties of GeO2/Ormosils Organic-Inorganic Composite Films Doped with Azobenzene

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 818
Author(s):  
Xuehua Zhang ◽  
Qian Wang ◽  
Shun Liu ◽  
Wei Zhang ◽  
Fangren Hu ◽  
...  
Keyword(s):  
Optical Waveguide ◽  
Data Storage ◽  
Optical Switching ◽  
Sol Gel ◽  
Composite Films ◽  
Optical Data Storage ◽  
Optical Data ◽  
Single Chip ◽  
Coating Method ◽  
Inorganic Composite

GeO2/organically modified silane (ormosils) organic-inorganic composite films containing azobenzene were prepared by combining sol-gel technology and spin coating method. Optical waveguide properties including the refractive index and thickness of the composite films were characterized by using a prism coupling instrument. Surface morphology and photochemical properties of the composite films were investigated by atomic force microscope and Fourier transform infrared spectrometer. Results indicate that the composite films have smooth and neat surface, and excellent optical waveguide performance. Photo-isomerization properties of the composite films were studied by using a UV–Vis spectrophotometer. Optical switching performance of the composite films was also studied under the alternating exposure of 365 nm ultraviolet light and 410 nm visible light. Finally, strip waveguides and microlens arrays were built in the composite films through a UV soft imprint technique. Based on the above results, we believe that the prepared composite films are promising candidates for micro-nano optics and photonic applications, which would allow directly integrating the optical data storage and optical switching devices onto a single chip.

Preparation and properties of polyurethane coatings modified by polysilazane

2019 ◽  
Vol 32 (6) ◽  
pp. 611-619 ◽  
Author(s):  
Xiaoli Liu ◽  
Zhen Ge ◽  
Wenguo Zhang ◽  
Yunjun Luo
Keyword(s):  
Mechanical Property ◽  
Photoelectron Spectroscopy ◽  
Composite Coatings ◽  
Composite Films ◽  
Dip Coating ◽  
Water Contact ◽  
Research Attention ◽  
Elongation At Break ◽  
Coating Method ◽  
Dip Coating Method

Due to their unique physicochemical properties, polysilazanes exhibit excellent performance when combined with some resin matrixes, which had drawn great research attention. In this article, polyurethane (PU) was firstly prepared by polytetrahydrofuran glycol, isophorone diisocyanate, and 1,4-butanediol as main materials. Then, the prepared PU was blended with polysilazane by mixing the two solutions together, which was cured to films via dip-coating method at room temperature. The structure, thermal stability, and surface properties of the composite coatings were investigated by Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and X-ray photoelectron spectroscopy. The results demonstrated that after modification with polysilazane, the heat resistance, hydrophobicity, and mechanical property of the PU coatings were improved. When the content of polysilazane was 6 wt%, the mechanical property of the composite films was optimized, with a maximum tensile strength of 25.7 MPa and elongation at break of 797%. Meanwhile, the water contact angle of the composite film was 107° and the water absorption reached a minimum of 2.1%, which showed improved hydrophobicity and water resistance.

scholarly journals Sol-Gel Synthesis of TiO2/SiO2 and ZnO/SiO2 Composite Films and Evaluation of Their Photocatalytic Activity towards Methyl Green

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
V. L. Chandraboss ◽  
B. Karthikeyan ◽  
J. Kamalakkannan ◽  
S. Prabha ◽  
S. Senthilvelan
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
Methyl Green ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Coating Method ◽  
Dip Coating Method

The TiO2/SiO2 and ZnO/SiO2 composite films were prepared by sol-gel dip coating method. The surface morphology and crystal structure of thin films were characterized by means of scanning electron microscopy (SEM) with elementary dispersive X-ray analysis (EDX) and X-ray diffractometer (XRD). Optical properties of films have been investigated using ultraviolet and visible spectroscopy (UV-visible spectroscopy). The photocatalytic activity was established by testing the degradation and decolorization of methyl green (MG) from aqueous solution with artificial UV-light.

Design and characterization of chitosan/zeolite composite films — Effect of zeolite type and zeolite dose on the film properties

2016 ◽  
Vol 60 ◽  
pp. 246-254 ◽  
Author(s):  
Gustavo P. Barbosa ◽  
Henrique S. Debone ◽  
Patrícia Severino ◽  
Eliana B. Souto ◽  
Classius F. da Silva
Keyword(s):  
Composite Films ◽  
Film Properties ◽  
Zeolite Type ◽  
Zeolite Composite

scholarly journals Morphology, order, light transmittance, and water vapor permeability of aluminum-coated polypropylene zeolite composite films

2010 ◽  
Vol 120 (3) ◽  
pp. 1671-1678 ◽  
Author(s):  
Devrim Balköse ◽  
Kaan Oguz ◽  
Lutfi Ozyuzer ◽  
Suleyman Tari ◽  
Esen Arkis ◽  
...  
Keyword(s):  
Water Vapor ◽  
Composite Films ◽  
Water Vapor Permeability ◽  
Light Transmittance ◽  
Vapor Permeability ◽  
Zeolite Composite

Research on Poly Lactic Acid Solvent Coated Paper

2012 ◽  
Vol 200 ◽  
pp. 380-384
Author(s):  
Jing Lei Tai ◽  
Guang Xue Chen ◽  
Qi Feng Chen ◽  
Bao Lin Tang
Keyword(s):  
Oxygen Permeability ◽  
Water Vapor Permeability ◽  
Poly Lactic Acid ◽  
Vapor Permeability ◽  
Poly Ethylene Glycol ◽  
Coated Paper ◽  
Roll Coating ◽  
Coating Method ◽  
Poly Ethylene ◽  
Poly Caprolactone

This paper draws on a roll coating method which used for the production of coated paper. Polylactide coating cardboard was prepared through the solvent coating, and study its packaging performance. In this study, chloroform is based solvent, ethanol or n-propanol as auxiliary solvents, poly (ethylene glycol) or poly caprolactone as plasticizer, and the water vapor permeability, oxygen permeability and heat sealability of polylactic acid coated cardboard.

Preparation and Photoelectric Properties of Nb/SnO2 Composite Thin Films

2016 ◽  
Vol 852 ◽  
pp. 1118-1122
Author(s):  
Rui Ying He ◽  
Chang Ping Wei ◽  
Guo Dong Wang ◽  
Jing San
Keyword(s):  
Sol Gel ◽  
Composite Films ◽  
Ultraviolet Region ◽  
Doping Amount ◽  
Experimental Conditions ◽  
Glass Substrates ◽  
Structure And Morphology ◽  
Near Ultraviolet ◽  
Photoelectric Properties ◽  
Coating Method

By using sol-gel method, Nb/SnO2 gel was prepared,and spin coating method was used to coat on glass substrates, which dried and calcined to obtain a homogeneous Nb / SnO2 composite films.Under the same experimental conditions, the different doping amount of nickel, calcination temperature on the structure and morphology of Nb/SnO2 film were discussed. By using XRD, IR, SEM and other testing methods, the structure and morphology of Nb / SnO2 composite film were characterized.At 500 °C, the film particle had high crystallization and small size,and the surface of the film was well-distributed.Its optical and electrical properties were tested by the ultraviolet-visible spectrophotometer and four-probe resistivity meter.UV-Vis spectra showed that Nb / SnO2 film absorbance in the near ultraviolet region had increased significantly, but the absorbance showed a downward trend with the increasing amount of Nb5+ doped;Conductivity analysis showed: Nb5+ doping amount of 8% (the amount of material), the conductivity of Nb/SnO2 composite films was best.

Fabrication of Polyaniline-Coated Carbon Nanotubes Conducting Wire Nanocomposite for NH3 Gas Sensors at Room Temperature

2012 ◽  
Vol 554-556 ◽  
pp. 661-666
Author(s):  
Kan Kan ◽  
Chun Sheng Chen ◽  
Guang Xin Zhang ◽  
Chao Jiang ◽  
Li Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Room Temperature ◽  
Gas Sensing ◽  
Oxidative Polymerization ◽  
Composite Films ◽  
Ammonium Persulfate ◽  
Coating Method ◽  
Conducting Wire ◽  
Coated Carbon ◽  
Higher Sensitivity

The nanocomposite of polyaniline (PAni)-coated Carbon nanotubes (CNT) for NH3gas sensing application are presented in this paper. The nanorods of PAni/CNT nanocomposite was synthesized by chemical oxidative polymerization of aniline using ammonium persulfate in acidic medium. The aniline was adsorbed in CNT by vacuum absorption method. The morphologies and properties of the nanocomposite have been characterized by SEM, XRD and FTIR respectively. Thin sensor of PAni/CNT nanorods was prepared by spin coating method. Finally, the response of these composite films for NH3gas was evaluated by monitoring the change in electrical resistance at room temperature. With compared to the pure PAni and CNT, tSubscript texthe nanorods of PAni/CNT composite films show a higher sensitivity.

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