Polymerization of N,N-dimethylacrylamide in Aerosol OT-water mixtures: from lamellae to segregation
(2003) In Colloids and Surfaces A: Physicochemical and Engineering Aspects 218(1-3). p.11-20- Abstract
- The polymerizable N,N-dimethylacrylamide (DMAA) is added to the lamellar liquid crystalline system formed by the anionic surfactant Aerosol OT and water. Small angle X-ray scattering, gives the same bilayer thickness and hydrophilic group cross-sectional area as without DMAA, and an environment sensitive fluorescent probe indicates that DMAA is likely to be in the water layers between the AOT bilayers. This shows that the structure of the AOT bilayer in the lamellar phase is not affected by DMAA. However, DMAA induces instability of the lamellar phase, and a second phase, an isotropic solution, appears for larger DMAA contents
The effect of DMAA in stabilizing this phase with respect to lamellae is much
larger than that... (More) - The polymerizable N,N-dimethylacrylamide (DMAA) is added to the lamellar liquid crystalline system formed by the anionic surfactant Aerosol OT and water. Small angle X-ray scattering, gives the same bilayer thickness and hydrophilic group cross-sectional area as without DMAA, and an environment sensitive fluorescent probe indicates that DMAA is likely to be in the water layers between the AOT bilayers. This shows that the structure of the AOT bilayer in the lamellar phase is not affected by DMAA. However, DMAA induces instability of the lamellar phase, and a second phase, an isotropic solution, appears for larger DMAA contents
The effect of DMAA in stabilizing this phase with respect to lamellae is much
larger than that expected from a simple dilution with
water. Furthermore, there is a combined influence of temperature and
DMAA concentration on the coexistence of the lamellar and the isotropic
phases. When an initiator is added and the monomer polymerizes the
tendency to phase separate increases strongly. The lamellar spacing
after polymerization is below the value predicted by the global AOT/H2O
ratio. This indicates that the polymer segregates from the AOT phase
and that the lamellar phase is osmotically compressed by the polymer
rich phase. (C) 2003 Elsevier Science B.V. All rights
reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/122135
- author
- Pacios, I E ; Renamayor, C S ; Horta, A ; Lindman, Björn LU and Thuresson, Krister LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- AOT, N, N-dimethylacrylamide, Polymerization, Lamellar
- in
- Colloids and Surfaces A: Physicochemical and Engineering Aspects
- volume
- 218
- issue
- 1-3
- pages
- 11 - 20
- publisher
- Elsevier
- external identifiers
-
- wos:000183508500002
- scopus:0038242150
- ISSN
- 0927-7757
- DOI
- 10.1016/S0927-7757(02)00583-6
- language
- English
- LU publication?
- yes
- id
- e4750cae-7942-4b93-9198-00a1bdc4adbe (old id 122135)
- date added to LUP
- 2016-04-01 16:03:02
- date last changed
- 2022-02-05 05:28:42
@article{e4750cae-7942-4b93-9198-00a1bdc4adbe, abstract = {{The polymerizable N,N-dimethylacrylamide (DMAA) is added to the lamellar liquid crystalline system formed by the anionic surfactant Aerosol OT and water. Small angle X-ray scattering, gives the same bilayer thickness and hydrophilic group cross-sectional area as without DMAA, and an environment sensitive fluorescent probe indicates that DMAA is likely to be in the water layers between the AOT bilayers. This shows that the structure of the AOT bilayer in the lamellar phase is not affected by DMAA. However, DMAA induces instability of the lamellar phase, and a second phase, an isotropic solution, appears for larger DMAA contents<br/><br> The effect of DMAA in stabilizing this phase with respect to lamellae is much<br/><br> larger than that expected from a simple dilution with<br/><br> water. Furthermore, there is a combined influence of temperature and<br/><br> DMAA concentration on the coexistence of the lamellar and the isotropic<br/><br> phases. When an initiator is added and the monomer polymerizes the<br/><br> tendency to phase separate increases strongly. The lamellar spacing<br/><br> after polymerization is below the value predicted by the global AOT/H2O<br/><br> ratio. This indicates that the polymer segregates from the AOT phase<br/><br> and that the lamellar phase is osmotically compressed by the polymer<br/><br> rich phase. (C) 2003 Elsevier Science B.V. All rights<br/><br> reserved.}}, author = {{Pacios, I E and Renamayor, C S and Horta, A and Lindman, Björn and Thuresson, Krister}}, issn = {{0927-7757}}, keywords = {{AOT; N; N-dimethylacrylamide; Polymerization; Lamellar}}, language = {{eng}}, number = {{1-3}}, pages = {{11--20}}, publisher = {{Elsevier}}, series = {{Colloids and Surfaces A: Physicochemical and Engineering Aspects}}, title = {{Polymerization of N,N-dimethylacrylamide in Aerosol OT-water mixtures: from lamellae to segregation}}, url = {{http://dx.doi.org/10.1016/S0927-7757(02)00583-6}}, doi = {{10.1016/S0927-7757(02)00583-6}}, volume = {{218}}, year = {{2003}}, }