Document Detail


Multi-walled carbon nanotube dispersion by the adsorbed humic acids with different chemical structures.
MedLine Citation:
PMID:  25463725     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Dissolved humic acid (disHA) is effective for suspending carbon nanotubes (CNTs), but the suspending mechanism is still unclear. This study used bleached and hydrolyzed humic acids as suspending agents to investigate effects of chemical structures on CNTs suspension. The adsorption of aromatic moieties-enriched disHA to CNTs was lower than aliphatic components-enriched disHA, but the former was better at suspending CNTs. These findings led to the development of a model, in which disHA with aromatic structures results in stable suspension of CNTs due to stronger steric hindrance. Because of their flexible structures, aliphatic components-enriched disHA molecules easily conformed to CNTs leading to higher adsorption to CNTs but weaker steric hindrance between CNTs. Therefore, the bridging and less suspension of CNTs was observed. This study emphasizes that suspending CNTs by disHA is not only controlled by the adsorbed amount of disHA, but also the chemical nature of disHA.
Authors:
Di Zhang; Bo Pan; Robert L Cook; Baoshan Xing
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-8
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  196C     ISSN:  1873-6424     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-12-2     Completed Date:  -     Revised Date:  2014-12-3    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  -    
Other Details:
Languages:  ENG     Pagination:  292-299     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier Ltd. All rights reserved.
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