posted on 2011-01-01, 00:00authored byYan Zhao, W Yang, Y Xue, Xungai Wang, Tong Lin
Layered double hydroxides (LDHs), either having nitrate counter anions or intercalated with organic molecules, have been for the first time partially exfoliated in dimethyl sulfoxide (DMSO) to form a transparent suspension. Atomic force microscopy (AFM) images showed that both the lateral size and the thickness of the LDH nanoplatelets were decreased after the exfoliation. The organic-LDHs maintained their intercalation characteristics, i.e. the thermal stability improvement of the incorporated organic anions, after the exfoliation in DMSO. Transparent ethylene-vinyl alcohol copolymer (EVOH) nanocomposite films containing partially exfoliated LDHs intercalated with UV absorbers were prepared using DMSO as the processing solvent. As the first reported example of a highly transparent LDH/polymer composite, the obtained composite film had a visible light transmittance of 90% (comparable to that of the pure matrix), was flexible and exhibited an excellent UV-shielding capability and thermal stability.
History
Journal
Journal of materials chemistry
Volume
21
Pagination
4869 - 4874
Location
Cambridge, England
Open access
Yes
ISSN
0959-9428
eISSN
1364-5501
Language
eng
Publication classification
C1 Refereed article in a scholarly journal; C Journal article