Poly(vinyl alcohol)-borate gels as carriers of microemulsions
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913704" target="_blank" >RIV/60461373:22310/17:43913704 - isvavai.cz</a>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Poly(vinyl alcohol)-borate gels as carriers of microemulsions
Popis výsledku v původním jazyce
Poly(vinyl alcohol) ? borate gels can be used as carriers of organic solvents or as carriers of aqueous microemulsions and micellar solutions of organic solvents, which can be used instead of pure and effective but toxic organic solvents. Thanks to their micellar structure, microemulsions and micellar solutions reduce toxicity of organic solvents and potential damage to the cleaned object. Using a poly(vinyl alcohol) ? borate gel as a carrier reduces evaporation of solvents and therefore reduces their environmental impact, limits penetration of cleaning components into the surface of the treated subject and provides easy control of the cleaning process due to transparency of the gel. In this paper, some basic properties of poly(vinyl-alcohol) gels and possibility of preparation of gels containing microemulsion or micellar solution are discussed. Viscosity measurements showed that viscosity of gels increases with rising molecular weight and with the degree of hydrolysis of the selected poly(vinyl alcohol). Measurements also showed that increasing content of poly(vinyl alcohol) causes non-linear increase of gel-like system viscosity whereas increasing content of sodium tetraborate causes linear increase of viscosity. Different pH values of initial aqueous phase have no effect on the pH value of the final gels owing to buffer character of sodium tetraborate and neither have any effect on a gel?s viscosity. Testing various preparation methods showed that it is possible to prepare gels containing microemulsion based on sodium dodecyl sulfate or microemulsion based on Tween 20. The possibility of preparing gels containing micellar solutions depends on amount of organic solvent in continuous phase, not on a type of used surfactants. Relation between viscosity of gels containing microemulsion or micellar solution and content of poly(vinyl alcohol) and sodium tetraborate remains the same as suggested above.
Název v anglickém jazyce
Poly(vinyl alcohol)-borate gels as carriers of microemulsions
Popis výsledku anglicky
Poly(vinyl alcohol) ? borate gels can be used as carriers of organic solvents or as carriers of aqueous microemulsions and micellar solutions of organic solvents, which can be used instead of pure and effective but toxic organic solvents. Thanks to their micellar structure, microemulsions and micellar solutions reduce toxicity of organic solvents and potential damage to the cleaned object. Using a poly(vinyl alcohol) ? borate gel as a carrier reduces evaporation of solvents and therefore reduces their environmental impact, limits penetration of cleaning components into the surface of the treated subject and provides easy control of the cleaning process due to transparency of the gel. In this paper, some basic properties of poly(vinyl-alcohol) gels and possibility of preparation of gels containing microemulsion or micellar solution are discussed. Viscosity measurements showed that viscosity of gels increases with rising molecular weight and with the degree of hydrolysis of the selected poly(vinyl alcohol). Measurements also showed that increasing content of poly(vinyl alcohol) causes non-linear increase of gel-like system viscosity whereas increasing content of sodium tetraborate causes linear increase of viscosity. Different pH values of initial aqueous phase have no effect on the pH value of the final gels owing to buffer character of sodium tetraborate and neither have any effect on a gel?s viscosity. Testing various preparation methods showed that it is possible to prepare gels containing microemulsion based on sodium dodecyl sulfate or microemulsion based on Tween 20. The possibility of preparing gels containing micellar solutions depends on amount of organic solvent in continuous phase, not on a type of used surfactants. Relation between viscosity of gels containing microemulsion or micellar solution and content of poly(vinyl alcohol) and sodium tetraborate remains the same as suggested above.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
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OECD FORD obor
10404 - Polymer science
Návaznosti výsledku
Projekt
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Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
Gels in the Conservation of Art
ISBN
978-1-909492-50-9
ISSN
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e-ISSN
neuvedeno
Počet stran výsledku
3
Strana od-do
277-279
Název nakladatele
Archetype publications
Místo vydání
Londýn
Místo konání akce
Londýn
Datum konání akce
16. 10. 2017
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
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