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On the formation an...
On the formation and stability of cellulose-based emulsions in alkaline systems : Effect of the solvent quality
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- Costa, Carolina (författare)
- Mid Sweden University,Mittuniversitetet,Institutionen för kemiteknik,FSCN
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- Medronho, Bruno (författare)
- Mid Sweden University,Mittuniversitetet,Institutionen för kemiteknik,University of Algarve, Campus de Gambelas, Ed. 8, 8005-139 Faro, Portugal,FSCN
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- Filipe, Alexandra (författare)
- University of Algarve, Campus de Gambelas, Ed. 8, 8005-139 Faro, Portugal
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- Romano, Anabela (författare)
- University of Algarve, Campus de Gambelas, Ed. 8, 8005-139 Faro, Portugal
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- Lindman, Björn (författare)
- Lund University,Lunds universitet,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,University of Coimbra
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- Edlund, Håkan, 1966- (författare)
- Mid Sweden University,Mittuniversitetet,Institutionen för kemiteknik,FSCN
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- Norgren, Magnus, 1967- (författare)
- Mid Sweden University,Mittuniversitetet,Institutionen för kemiteknik,FSCN
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Carbohydrate Polymers. - : Elsevier BV. - 0144-8617 .- 1879-1344. ; 286
- Relaterad länk:
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https://doi.org/10.1...
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https://doi.org/10.1...
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http://dx.doi.org/10... (free)
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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
- With amphiphilic properties, cellulose molecules are expected to adsorb at the O/W interface and be capable of stabilizing emulsions. The effect of solvent quality on the formation and stability of cellulose-based O/W emulsions was evaluated in different alkaline systems: NaOH, NaOH-urea and tetrabutylammonium hydroxide (TBAH). The optimal solvency conditions for cellulose adsorption at the O/W interface were found for the alkaline solvent with an intermediate polarity (NaOH-urea), which is in line with the favorable conditions for adsorption of an amphiphilic polymer. A very good solvency (in TBAH) and the interfacial activity of the cation lead to lack of stability because of low cellulose adsorption. However, to achieve long-term stability and prevent oil separation in NaOH-urea systems, further reduction in cellulose's solvency was needed, which was achieved by a change in the pH of the emulsions, inducing the regeneration of cellulose at the surface of the oil droplets (in-situ regeneration).
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- Regenerated cellulose
- Amphiphilicity
- Dissolution
- NaOH
- TBAH
- Urea
- O/W emulsions
- Amphiphilicity
- Dissolution
- NaOH
- O/W emulsions
- Regenerated cellulose
- TBAH
- Urea
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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