Poly(vinyl alcohol)-borate gels as carriers of microemulsions

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Poly(vinyl alcohol)-borate gels as carriers of microemulsions

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Gels in the Conservation of Art

ISBN

978-1-909492-50-9

ISSN

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e-ISSN

neuvedeno

Number of pages

3

Pages from-to

277-279

Publisher name

Archetype publications

Place of publication

Londýn

Event location

Londýn

Event date

Oct 16, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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