Document Detail

Complexes of Polydopamine-Modified Clay And Ferric Ions as the Framework for Pollutant-Absorbing Supramolecular Hydrogels.
MedLine Citation:
PMID:  23289718     Owner:  NLM     Status:  Publisher    
Clay-based functional hydrogels were facilely prepared via a bio-inspired approach. Montmorillonite (clay) was exfoliated into single layers in water, and then coated with a thin layer of polydopamine (PDOPA) via in situ polymerization of dopamine under basic aqueous condition. When a small amount of ferric salt was added into aqueous suspensions of the polydopamine-coated clay (D-clay), D-clay and Fe3+ ions could rapidly self assemble into three-dimensional networks through the formation of coordination bonds. Consequently, supramolecular hydrogels were formed at very low D-clay contents. Rheological measurements show that the D-clay/Fe3+ hydrogels exhibit fairly elastic response in low stain range, and have self-healing capability upon removal of applied large stress. More importantly, the hydrogels can be used as adsorbents to effectively remove Rhodamine 6G (Rh6G), a organic pollutant, from water. UV-Vis absorption spectra of the Rh6G-loaded hydrogels show bands related to π-π stacking interactions between the aromatic moieties of PDOPA and Rh6G, confirming the formation of PDOPA/Rh6G complex on the surface of D-clay.
Xuehong Lu; Shu Huang; Liping Yang; Ming Liu; Si Lei Phua; Wu Aik Yee; Wanshuang Liu; Rui Zhou
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-6
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  Langmuir     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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