scholarly journals Nitric Acid-Treated Carbon Fibers with Enhanced Hydrophilicity for Candida tropicalis Immobilization in Xylitol Fermentation

Materials ◽  
2016 ◽  
Vol 9 (3) ◽  
pp. 206 ◽  
Author(s):  
Le Wang ◽  
Na Liu ◽  
Zheng Guo ◽  
Dapeng Wu ◽  
Weiwei Chen ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Carbon Fibers ◽  
Candida Tropicalis ◽  
Treated Carbon ◽  
Xylitol Fermentation

A Study of Surface Modification on Adsorption Behaviors of Nanoporous Carbon

2007 ◽  
Vol 119 ◽  
pp. 211-214 ◽  
Author(s):  
Byeoung Ku Kim ◽  
Young Seak Lee ◽  
Seung Kon Ryu ◽  
Byung Joo Kim ◽  
Soo Jin Park
Keyword(s):  
Nitric Acid ◽  
Functional Groups ◽  
Carbon Fibers ◽  
Acid Treatment ◽  
Surface Acidity ◽  
Activated Carbon Fibers ◽  
Adsorption Behaviors ◽  
Toxic Gases ◽  
Adsorption Amount ◽  
Polar Functional Groups

In this work, to introduce polar functional groups on carbon surfaces, activated carbon fibers (ACFs) were treated by nitric acid in order to enhance the adsorption capacity of propylamine which was one of toxic gases in cigarette smoke. It was found that the polar functional groups were predominantly increased up to 2.0 M of nitric acid, resulting in the increase of total surface acidity. It was found that the adsorption amount of propylamine of the modified ACFs was increased around 17% after a nitric acid treatment. From the XPS results, it was observed that propylamine was reacted with strong or weak polar (acidic) groups, such as COOH, -COO or OH existed on the ACF surfaces.

Liquid-Phase Oxidation Modification of Carbon Fiber Surface

2012 ◽  
Vol 430-432 ◽  
pp. 2008-2012 ◽  
Author(s):  
Wen Bo Lu ◽  
Cheng Guo Wang ◽  
Hua Yuan ◽  
Xiu Ying Hu
Keyword(s):  
Nitric Acid ◽  
Liquid Phase ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Fiber Surface ◽  
Oxidation Time ◽  
Liquid Phase Oxidation ◽  
Acid Oxidation ◽  
Oxidation Treatment ◽  
Phase Oxidation

The carbon fibers were subjected to liquid–phase oxidation treatment in 65% nitric acid solution. The relation between liquid-phase oxidation time and structure of carbon fibers had been assessed by LRS, XRD, SEM, and FTIR. The results indicate that smaller surface crystallites obtained by etching and more unsaturated carbon created after treatment, and corrosion enhanced with the increase of oxidation time. But nitric acid oxidation treatment does not change the bulk structure of carbon fibers. After nitric acid treated, the grooves of surface is wider and deeper compared to the original carbon fiber, When the oxidation times reach 12 hours, the surface of carbon fibers is severely damage. When the oxidation times reach 6 hours, there is not any characteristic peek in the FTIR. But after oxidation treatment for 9 hours, -COOH, -OH can be found from FTIR. So the best time for liquid-phase oxidation process is 9 hours.

Wettability and Adhesion Characteristics of Plasma-Treated Carbon Fibers

1996 ◽  
Vol 57 (1-4) ◽  
pp. 45-53 ◽  
Author(s):  
K. Tsutsumi ◽  
K. Ban ◽  
K. Shibata ◽  
S. Okazaki ◽  
M. Kogoma
Keyword(s):  
Carbon Fibers ◽  
Treated Carbon

Fabrication of the Carbon Paper by Wet-Laying of Ozone-Treated Carbon Fibers with Hydrophilic Functional Groups

2013 ◽  
Vol 58 (1) ◽  
pp. 1069-1074 ◽  
Author(s):  
H. Kim ◽  
Y.-J. Lee ◽  
D.-C. Lee ◽  
G.-G. Park ◽  
Y. Yoo
Keyword(s):  
Functional Groups ◽  
Carbon Fibers ◽  
Carbon Paper ◽  
Treated Carbon
Sign in / Sign up

Export Citation Format

Share Document