Effect of Silica on the Electrical Properties of Epoxy of Phenolic Resin/Carbon Black/Silica Composite Coating

2007 ◽  
Vol 546-549 ◽  
pp. 1525-1530 ◽  
Author(s):  
Wei Zhang ◽  
Richard Blackburn ◽  
Abbas Dehghani
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Surface Coating ◽  
Phenolic Resin ◽  
Weight Ratio ◽  
Silica Content ◽  
Surface Coatings ◽  
Resin Matrix ◽  
Dispersion Effects ◽  
Mapping Analysis

Nanocomposites were prepared by embedding carbon black and silica into phenolic resin matrix, which was supported by SEM and particle size analyses. After milling stage, the obtained hybrids were applied to transparency film using K control coater. By the crosslinking procedure, homogenous surface coatings can be achievable. The electrical properties of surface coating can be tailored by variation of silica content with the amount of carbon black fixed. The conductivity of the surface coating increases steeply and then reaches a plateau with the increase of silica. When the weight ratio of silica to carbon black is around 1:2, relatively high conductivity can be desirable. Further increase in silica results in the decrease in conductivity. This can be interpreted in terms of aided or blocked dispersion effects on carbon black imposed by silica. Also, the uniformity of the film is verified by Si-mapping analysis.

ZrO2f-coated Cf hybrid fibrous reinforcements and properties of their reinforced ceramicizable phenolic resin matrix composites

2021 ◽  
Vol 41 (3) ◽  
pp. 1810-1816
Author(s):  
Zhenyue Zou ◽  
Yan Qin ◽  
Huadong Fu ◽  
Di Zhu ◽  
Zhuangzhuang Li ◽  
...  
Keyword(s):  
Phenolic Resin ◽  
Resin Matrix ◽  
Matrix Composites

scholarly journals Characterizing the sealing materials of the merchant ship Nanhai I of the Southern Song Dynasty

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Yihang Zhou ◽  
Kai Wang ◽  
Jian Sun ◽  
Yong Cui ◽  
Dongbo Hu
Keyword(s):  
Surface Coating ◽  
Song Dynasty ◽  
Weight Ratio ◽  
Tung Oil ◽  
Southern Song Dynasty ◽  
Southern Song ◽  
Merchant Ship ◽  
Main Components ◽  
Analytical Approaches ◽  
Sealing Materials

AbstractNanhai I is a highly valuable shipwreck of the Southern Song Dynasty for studying various topics, including the shipbuilding techniques. The sealing materials are of significant importance to ensure the ship’s reliability during the voyage across the ocean and they were rarely analyzed. Therefore, the sealing materials of this ship were analyzed by several analytical approaches. The sealing materials included two types, i.e., gap filler with jute fibers and surface coating without any oakum. The main components of both types of putty are calcite with minor Tung oil. The weight ratio of Ca(OH)2/Tung oil range from 4.3:1 to 7.9:1 for surface coating samples and the weight ratio of Ca(OH)2/organics is 3.1:1 for the gap filler sample. Additionally, we first find that the surface coating has a layered structure, where outer layers contain more Tung oil than inner layers. The innermost layer of the surface coating sample might be altered by organic acids from wood deterioration, causing its loose structure and grey color. The composite layers with different formula might be a result of balancing the costs and performances of the putty.

Electrical Properties of Electrospun Nanofibers of PEO/Carbon Black Composite

2009 ◽  
Vol 151 ◽  
pp. 67-71 ◽  
Author(s):  
Wai Kit Li ◽  
Y.W. Wong
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Polyethylene Oxide ◽  
Electrospun Nanofibers ◽  
Angular Speed ◽  
Polymer Fibers ◽  
Fiber Direction ◽  
Fiber Morphology ◽  
Polarized Ftir ◽  
Specific Orientation

Electrospinning is an efficient technique for the fabrication of polymer nanofibers. The charges inside the polymer jet tend to repel each other so as to stretch and reduce the diameter of the polymer fibers. By rotating the collector at a fast angular speed, nanofibers with specific orientation can be obtained. In this study, nanofibers of Polyethylene oxide (PEO) with carbon black were prepared by electrospinning. PEO was dissolved in a mixture of water and ethanol. PEO is known as an electrolytic polymer. With the blending of carbon black powders, its electrical properties along the fiber direction were investigated. The fiber morphology and characteristics were studied by SEM and polarized FTIR.

scholarly journals Impact of anti-biofouling surface coatings on the properties of nanomaterials and their biomedical applications

2018 ◽  
Vol 6 (1) ◽  
pp. 9-24 ◽  
Author(s):  
Yuancheng Li ◽  
Yaolin Xu ◽  
Candace C. Fleischer ◽  
Jing Huang ◽  
Run Lin ◽  
...  
Keyword(s):  
Surface Coating ◽  
Biomedical Applications ◽  
Biological Systems ◽  
Surface Coatings ◽  
Specific Interactions ◽  
Coating Materials

Various anti-biofouling surface coating materials for nanoparticles have been reviewed for the reduction of their non-specific interactions with biological systems.

Characterization of hybrid fillers based on carbon black of different types obtained by impregnation

2015 ◽  
Vol 231 (7) ◽  
pp. 584-599 ◽  
Author(s):  
Ahmed A Al-Ghamdi ◽  
Omar A Al-Hartomy ◽  
Falleh R Al-Solamy ◽  
Nikolay Dishovsky ◽  
Petrunka Malinova ◽  
...  
Keyword(s):  
Carbon Black ◽  
Inductively Coupled Plasma ◽  
Total Pore Volume ◽  
Silica Content ◽  
Dual Phase ◽  
Hybrid Filler ◽  
Average Pore ◽  
Hybrid Fillers ◽  
Different Types ◽  
Two Phases

The paper presents the investigations on obtaining dual phase fillers with preset silica content running a successful impregnation of two completely different types of conventional carbon black with silicasol. The hybrid fillers studied were characterized by atomic absorption spectroscopy and inductively coupled plasma–optical emission spectroscopy. The total pore volume, the average pore diameter, the specific surface area, the oil absorption number, and iodine adsorption of the fillers were also investigated. The distribution of both phases within the hybrid filler obtained and their interpenetration were investigated with scanning transmission electron microscopy-energy dispersive X-ray spectroscopy. The hybrid products obtained were investigated as reinforcing fillers of natural rubber-based composites. The results obtained show that the suggested impregnation with silicasol of conventional carbon black is a perspective method for preparation of carbon-silica dual phase fillers. The method provides an easy control over the quantitative ratio between the two phases. The fillers thus prepared do not change significantly the curing and mechanical characteristics of the vulcanizates, but improve their thermal aging resistance. The isolation of the carbon black aggregates by the silica phase, and the interpenetration of the two phases is a prerequisite to obtain elastomer composites of good mechanical and microwave properties suitable for producing of microwave shielding devices.

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