Investigation of Protective Coatings for Carbon Fibers by the Sol-Gel Method

2018 ◽  
Vol 284 ◽  
pp. 1242-1247 ◽  
Author(s):  
R.F. Gallyamova ◽  
S.N. Galyshev ◽  
F.F. Musin ◽  
A.G. Badamshin ◽  
V.A. Dokichev
Keyword(s):  
Carbon Fiber ◽  
Protective Coatings ◽  
Sol Gel ◽  
Fiber Surface ◽  
Soaking Time ◽  
Gel Method ◽  
Sol Gel Method ◽  
Carbon Fiber Surface ◽  
First Time ◽  
Coated Carbon

The article shows the possibility of applying a silicon dioxide coating on the carbon fiber by the sol-gel method. The evaluation of the protective properties of the obtained coatings at a temperature of 600 ° C is given; the changing of the a coated fiber surface morphology during the destruction process is shown for the first time. The destruction of the carbon fiber surface without coating begins at a soaking time of 120 min, which is accompanied by a significant decrease in the diameter of the fiber. The destruction of the coated carbon fiber surface begins at a soaking time of 360 minutes, the fiber diameter changes insignificantly. The paper shows that the sol-gel coatings slow down the oxidation of the carbon fiber more than 2 times.

Synthesis, crystal structure and photoluminescence properties of Eu2+-activated RbCaGd(PO4)2 phosphors

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11211-11217 ◽  
Author(s):  
Xue Chen ◽  
Qidi Wang ◽  
Fengzhu Lv ◽  
Paul K. Chu ◽  
Yihe Zhang
Keyword(s):  
Crystal Structure ◽  
Sol Gel ◽  
Dipole Interaction ◽  
Concentration Quenching ◽  
Photoluminescence Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
First Time

RbCaGd(PO4)2:Eu2+ was prepared by the Pechini-type sol–gel method. The crystal structure was determined in the first time. The dipole–dipole interaction plays a major role in the mechanism of concentration quenching of Eu2+ in this phosphor.

Preparation and Property of Epoxy Based Nano-SiO2/TiO2/Polyimide Hybrid Enhanced Sizing

2011 ◽  
Vol 335-336 ◽  
pp. 96-100
Author(s):  
Cun Zhou ◽  
Jian Li Cheng ◽  
Yu Sun
Keyword(s):  
Carbon Fiber ◽  
Sol Gel ◽  
Fiber Surface ◽  
Nano Particles ◽  
Interface Properties ◽  
Particle Size Analyzer ◽  
Complex Technology ◽  
Carbon Fiber Surface ◽  
Interlaminar Shear ◽  
Micro Morphology

Abstract: An epoxy based nano-SiO2/TiO2/polyimide hybrid enhanced sizing for carbon fiber was prepared by modified SiO2/TiO2precursor in PAA collosol with silane couple agent(WD-50) and eligibility surfactant via sol-gel reaction, and both ultrasonic cavitation and multi-complex technology were used during the process. The properties of PAA-SiO2-TiO2hybrid sizing and micro-morphology of carbon fiber surface were analyzed by FTIR, DSC, Particle Size Analyzer and STM. The results indicated that nanoscale SiO2•TiO2particles dispersed in the hybrid sizing film homogeneously, and a layer with nano particles was formed on carbon fiber surface after treated by the hybrid enhanceing sizing. The roughness was increased and interface properties of carbon fiber would be improved. At the same time both tensile strength and the interlaminar shear strength were increased obviously.

DIFFERENT MORPHOLOGIES OFTiO2NANOSTRUCTURES IN ACIDIC AND BASIC SOL–GEL METHOD

NANO ◽  
2010 ◽  
Vol 05 (05) ◽  
pp. 279-285 ◽  
Author(s):  
M. H. IMANIEH ◽  
Y. VAHIDSHAD ◽  
P. NOURPOUR ◽  
S. SHAKESI ◽  
K. SHABANI
Keyword(s):  
Ph Value ◽  
Sol Gel ◽  
Simple Method ◽  
Gel Method ◽  
Sol Gel Method ◽  
New Process ◽  
Nanocrystalline Titanium ◽  
Acidic Conditions ◽  
Nanocrystalline Titanium Dioxide ◽  
First Time

In this research, nanocrystalline titanium dioxide (TiO2) particles were prepared by a modified alkoxide technique under basic and acidic conditions at room temperatures. A simple method for preparing different morphology of TiO2has been developed. The reaction condition was used to control the crystalline size, phase and morphology of the TiO2nanostructures. In this process by adjusting the Rw(water to precursor ratio) and pH value the hydrolysis and condensation reactions were controlled. This led to the development of a new process to produce TiO2nanorod (for the first time by sol–gel method) at high pH value (basic) while the water content was sufficient whereas at low pH value (acidic) nanosphere TiO2were obtained. The powders were characterized by DTA, XRD, FE-SEM and UV–vis techniques and their physical properties were compared.

Preparation and Electromagnetic Wave Absorption Properties of Carbon Nanotubes-Titanium Dioxide Nanoparticles

2012 ◽  
Vol 457-458 ◽  
pp. 225-228 ◽  
Author(s):  
Xin Jun Wang ◽  
Fang Wang ◽  
Chen Gao ◽  
Dong Shan Sun
Keyword(s):  
Carbon Nanotubes ◽  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Sol Gel ◽  
Weight Fraction ◽  
Absorption Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
Microwave Absorbing Materials ◽  
Coated Carbon

A novel titanium dioxide （TiO2） nanoparticles coated carbon nanotubes (CNTs) composites were prepared by sol-gel method as microwave absorbing materials in this paper. SEM and XRD researches show that sol-gel method can realize uniform coating of CNTs with TiO2. Among them, with the weight fraction of TiO2/ CNTs composites was 10%, microwave absorption characteristics with a minimum RL value of -34 dB at 6.2 GHz on a coating with a matching thickness of 4mm and <−10 dB was obtained in the frequency range of 4.5-18 GHz with the thickness of 1.5-5.0mm.

Preparation and anti-oxidation properties of Si(O)C coated carbon-bonded carbon fibre composites

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 52347-52354 ◽  
Author(s):  
Min Niu ◽  
Hongjie Wang ◽  
Jiangbo Wen ◽  
Mingbo Ma ◽  
Xingyu Fan
Keyword(s):  
Carbon Fibre ◽  
Sol Gel ◽  
Carbon Fibres ◽  
Gel Method ◽  
Sol Gel Method ◽  
Fibre Composites ◽  
Oxidation Properties ◽  
Carbon Fibre Composites ◽  
Coated Carbon

An oxidation protective Si(O)C coating was fabricated on the carbon fibres of carbon-bonded carbon fibre (CBCF) composites using sol–gel method using dimethoxydimethylsilane and methyltrimethoxysilane as precursors.

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