Responsive Azobenzene-Containing Polymers and Gels
Name
MEBCS019.pdf
Size
391.29 KB
Format
Adobe PDF
Checksum (MD5)
13fff3edcb97448f7ff965f0f7359198
Author(s)
Deshmukh, Smeet
Bromberg, Lev
Hatton, T. Alan
Date Issued
January 2005
Series/Report no.
Molecular Engineering of Biological and Chemical Systems (MEBCS);
Abstract
The photoviscosity effect in aqueous solutions of novel poly(4-methacryloyloxyazobenzene-co-N,N-dimethyl acrylamide) (MOAB-DMA) was demonstrated. The observed significant reduction in the zero-shear viscosity upon UV-irradiation of MOAB-DMA aqueous solutions was due to the dissociation of the interchain azobenzene aggregates. Such phenomena can be advantageously used in photoswitchable fluidic devices and in protein separation. Introduction of enzymatically degradable azo cross-links into Pluronic-PAA microgels allowed for control of swelling due to degradation of the cross-links by azoreductases from the rat intestinal cecum. Dynamic changes in the cross-link density of stimuli-responsive microgels enable novel opportunities for the control of gel swelling, of importance for drug delivery and microgel sensoric applications.
Subjects
Responsive gels
trans-4-methacryloyloxy azobenzene
4,4’-di(methacryloylamino) azobenzene
cis-trans transitions
UV irradiation
Persistent DSpace Link
