Responsive Azobenzene-Containing Polymers and Gels
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 interc...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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2004
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| Online Access: | http://hdl.handle.net/1721.1/7490 |
| _version_ | 1811072647722696704 |
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| author | Deshmukh, Smeet Bromberg, Lev Hatton, T. Alan |
| author_facet | Deshmukh, Smeet Bromberg, Lev Hatton, T. Alan |
| author_sort | Deshmukh, Smeet |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T09:09:21Z |
| format | Article |
| id | mit-1721.1/7490 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:09:21Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | mit-1721.1/74902019-04-10T21:03:01Z Responsive Azobenzene-Containing Polymers and Gels Deshmukh, Smeet Bromberg, Lev Hatton, T. Alan Responsive gels trans-4-methacryloyloxy azobenzene 4,4’-di(methacryloylamino) azobenzene cis-trans transitions UV irradiation 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. Singapore-MIT Alliance (SMA) 2004-12-16T04:47:25Z 2004-12-16T04:47:25Z 2005-01 Article http://hdl.handle.net/1721.1/7490 en Molecular Engineering of Biological and Chemical Systems (MEBCS); 400677 bytes application/pdf application/pdf |
| spellingShingle | Responsive gels trans-4-methacryloyloxy azobenzene 4,4’-di(methacryloylamino) azobenzene cis-trans transitions UV irradiation Deshmukh, Smeet Bromberg, Lev Hatton, T. Alan Responsive Azobenzene-Containing Polymers and Gels |
| title | Responsive Azobenzene-Containing Polymers and Gels |
| title_full | Responsive Azobenzene-Containing Polymers and Gels |
| title_fullStr | Responsive Azobenzene-Containing Polymers and Gels |
| title_full_unstemmed | Responsive Azobenzene-Containing Polymers and Gels |
| title_short | Responsive Azobenzene-Containing Polymers and Gels |
| title_sort | responsive azobenzene containing polymers and gels |
| topic | Responsive gels trans-4-methacryloyloxy azobenzene 4,4’-di(methacryloylamino) azobenzene cis-trans transitions UV irradiation |
| url | http://hdl.handle.net/1721.1/7490 |
| work_keys_str_mv | AT deshmukhsmeet responsiveazobenzenecontainingpolymersandgels AT bromberglev responsiveazobenzenecontainingpolymersandgels AT hattontalan responsiveazobenzenecontainingpolymersandgels |