Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 19, Issue 33, Pages 10935-10944Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201204113
Keywords
adsorption; lignosulfonate; polymerization; self-assembly; silver
Categories
Funding
- National Natural Science Foundation of China [51272045]
- Natural Science Foundation of Fujian Province, China [2012J01201]
- Science-Technology Foundation of Education Bureau of Fujian Province, China [JA12031]
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Self-assembled poly(N-methylaniline)-lignosulfonate (PNMALS) composite spheres with reactive silver-ion adsorbability were prepared from N-methylaniline by using lignosulfonate (LS) as a dispersant. The results show that the PNMA-LS composite consisted of spheres with good size distribution and an average diameter of 1.03-1.27 mm, and the spheres were assembled by their final nanofibers with an average diameter of 19-34 nm. The PNMA-LS composite spheres exhibit excellent silver-ion adsorption; the maximum adsorption capacity of silver ions is up to 2.16 g g(-1) at an adsorption temperature of 308 K. TEM and wide-angle X-ray results of the PNMA-LS composite spheres after absorption of silver ions show that silver ions are reduced to silver nanoparticles with a mean diameter of about 11.2 nm through a redox reaction between the PNMA-LS composite and the silver ions. The main adsorption mechanism between the PNMA-LS composite and the silver ions is chelation and redox adsorption. In particular, a ternary PNMA-LS-Ag composite achieved by using the reducing reaction between PNMA-LS composite spheres and silver ions can be used as an antibacterial material with high bactericidal rate of 99.95 and 99.99% for Escherichia coli and Staphylococcus aureus cells, respectively.
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