Some novel aspects of DNA physical and chemical gels
(2006) In Arkivoc p.161-172- Abstract
- DNA chemical and physical networks have been investigated with respect to their stability and swelling, and rheological properties. Chemical networks were prepared by cross-linking DNA with ethylene glycol diglycidyl ether (EGDE), and physical networks by association with cationic polymers. Both types of gels display strong elastic properties and have a shear thinning behaviour. Addition of cationic surfactants effectively collapses the chemical gels, de-swelling starting from a critical aggregation concentration (cac) much lower than the critical micelle concentration (cmc) but similar to that for binding of surfactant to DNA in solution. The swelling-deswelling process appears to be reversible; thus the addition of an anionic surfactant... (More)
- DNA chemical and physical networks have been investigated with respect to their stability and swelling, and rheological properties. Chemical networks were prepared by cross-linking DNA with ethylene glycol diglycidyl ether (EGDE), and physical networks by association with cationic polymers. Both types of gels display strong elastic properties and have a shear thinning behaviour. Addition of cationic surfactants effectively collapses the chemical gels, de-swelling starting from a critical aggregation concentration (cac) much lower than the critical micelle concentration (cmc) but similar to that for binding of surfactant to DNA in solution. The swelling-deswelling process appears to be reversible; thus the addition of an anionic surfactant to a gel collapsed by cationic surfactant gives a gel volume close to that of the original gel. Physical networks prepared by mixing DNA (either single- or double-stranded) with cationic polyelectrolytes, both derivatives of hydroxyethyl cellulose, one of them carrying hydrophobic groups, show an intriguing asymmetric phase separation and a very different rheological response from that of the polymers alone. Phase maps of the mixtures show three distinctive regions, a two-phase region, a bluish one-phase region and a transparent one-phase region. Effects due to hydrophobic groups on the polymers are relatively minor. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/406911
- author
- Costa, Diana LU ; dos Santos, S ; Antunes, Filipe LU ; Miguel, MG and Lindman, Björn LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- swelling-deswelling, physical gels, chemical gels, DNA, cross-linking
- in
- Arkivoc
- pages
- 161 - 172
- publisher
- Arkat USA Inc
- external identifiers
-
- wos:000238150300011
- scopus:33645659746
- ISSN
- 1551-7012
- language
- English
- LU publication?
- yes
- id
- cf1b6936-f190-46fe-b0b8-a8feb56c2c29 (old id 406911)
- alternative location
- http://www.arkat-usa.org/?VIEW=MANUSCRIPT&MSID=1818
- date added to LUP
- 2016-04-01 16:04:19
- date last changed
- 2022-01-28 17:06:17
@article{cf1b6936-f190-46fe-b0b8-a8feb56c2c29,
abstract = {{DNA chemical and physical networks have been investigated with respect to their stability and swelling, and rheological properties. Chemical networks were prepared by cross-linking DNA with ethylene glycol diglycidyl ether (EGDE), and physical networks by association with cationic polymers. Both types of gels display strong elastic properties and have a shear thinning behaviour. Addition of cationic surfactants effectively collapses the chemical gels, de-swelling starting from a critical aggregation concentration (cac) much lower than the critical micelle concentration (cmc) but similar to that for binding of surfactant to DNA in solution. The swelling-deswelling process appears to be reversible; thus the addition of an anionic surfactant to a gel collapsed by cationic surfactant gives a gel volume close to that of the original gel. Physical networks prepared by mixing DNA (either single- or double-stranded) with cationic polyelectrolytes, both derivatives of hydroxyethyl cellulose, one of them carrying hydrophobic groups, show an intriguing asymmetric phase separation and a very different rheological response from that of the polymers alone. Phase maps of the mixtures show three distinctive regions, a two-phase region, a bluish one-phase region and a transparent one-phase region. Effects due to hydrophobic groups on the polymers are relatively minor.}},
author = {{Costa, Diana and dos Santos, S and Antunes, Filipe and Miguel, MG and Lindman, Björn}},
issn = {{1551-7012}},
keywords = {{swelling-deswelling; physical gels; chemical gels; DNA; cross-linking}},
language = {{eng}},
pages = {{161--172}},
publisher = {{Arkat USA Inc}},
series = {{Arkivoc}},
title = {{Some novel aspects of DNA physical and chemical gels}},
url = {{http://www.arkat-usa.org/?VIEW=MANUSCRIPT&MSID=1818}},
year = {{2006}},
}