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On the rheology of ...
On the rheology of mixed systems of hydrophobically modified polyacrylate microgels and surfactants : Role of the surfactant architecture
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- Alves, Luis (författare)
- CQC, University of Coimbra, Portugal
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- Lindman, Björn (författare)
- Mid Sweden University,Lund University,Lunds universitet,Mittuniversitetet,Avdelningen för kemiteknik,CQC, University of Coimbra, Portugal; Lund University,Fysikalisk kemi,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Physical Chemistry,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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- Klotz, Björn (författare)
- BASF Personal Care and Nutrition GmbH, Düsseldorf, Germany
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- Böttcher, Axel (författare)
- BASF Personal Care and Nutrition GmbH, Düsseldorf, Germany
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- Haake, Hans-Martin (författare)
- BASF Personal Care and Nutrition GmbH, Düsseldorf, Germany
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- Antunes, Filipe E. (författare)
- CQC, University of Coimbra, Portugal
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(creator_code:org_t)
- Elsevier BV, 2018
- 2018
- Engelska.
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Ingår i: Journal of Colloid and Interface Science. - : Elsevier BV. - 0021-9797 .- 1095-7103. ; 513, s. 489-496
- Relaterad länk:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Hypothesis The rheological control of suspensions is of key interest in the formulation design. A chemically cross-linked hydrophobically modified poly(acrylic acid) (HMCL-PAA), used as rheology modifier, is pH sensitive and shows swelling behavior above a critical pH due to the ionization of the acrylic acid groups. At low pH, HMCL-PAA suspensions are liquid and turbid. The binding of surfactants to HMCL-PAA, at low pH conditions, can result in significant changes on rheology and transparency of the polymeric suspensions, due to the swelling of the microgel particles. Experiments The influence of surfactants addition on the rheological properties and transparency of HMCL-PAA suspensions was determined. A systematic study was performed using different types of surfactants (ionic, non-ionic and zwitterionic). Findings The gelation efficiency of HMCL-PAA suspensions at low pH is strongly dependent on surfactant architecture: ionic surfactants are found to be much more efficient than non-ionic or zwitterionic surfactants. Ionic surfactants lead to a liquid-to-gel transition accompanied by an increase of transparency of the suspensions. Among the ionic surfactants, anionics show stronger interactions with the polymer. Also the surfactant hydrophobicity is relevant; the more hydrophobic the surfactant, the stronger is the binding to the polymer and thus the larger the particle swelling.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Nyckelord
- Crosslinked polymer
- Gelation
- Hydrophobic association
- Poly(acrylic acid) derivative
- Polymer/surfactant association
- Surfactant binding
- Crosslinked polymer
- Gelation
- Hydrophobic association
- Poly(acrylic acid) derivative
- Polymer/surfactant association
- Surfactant binding
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- art (ämneskategori)
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