Polyglycerol-poly(ε-caprolactone) block copolymer as a new semi-solid polymeric emulsifier to stabilize O/W nanoemulsions

Autor:	Sang Woo Han, Hwiseok Jun, Mintae Seo, Jin Woong Kim, Trang Huyen Le Kim, Yoon Sung Nam
Rok vydání:	2015
Předmět:	Materials science Polymers and Plastics Aqueous two-phase system chemistry.chemical_compound Colloid and Surface Chemistry Silicone chemistry Solubilization Polymer chemistry Dispersion stability Materials Chemistry Copolymer Homogenizer Physical and Theoretical Chemistry Caprolactone Semi solid
Zdroj:	Colloid and Polymer Science. 293:2949-2956
ISSN:	1435-1536 0303-402X
DOI:	10.1007/s00396-015-3659-8
Popis:	This work introduces a new polymeric emulsifier, polyglycerol-block-poly(e-caprolactone), to prepare and stabilize oil-in-water nanoemulsions through the formation of a semi-solid interphase between oil and water. Nanoemulsions are prepared using representative silicone and ester oils, which are widely used for commercial consumer products. The block copolymer is homogeneously solubilized in a mixture of oil and ethanol at 70 °C, and the organic solution is dispersed in water using a conventional homogenizer. Stable nanoemulsions of 220–280 nm in mean diameter are spontaneously generated. The block copolymer is reorganized at the interface to form a robust semi-solid polymeric barrier that can prevent the entrapped oil from diffusing out to the aqueous phase. The barrier exhibits excellent stability against mechanical stresses, allowing nanoemulsions to be very stable during repeated freeze/thaw cycles. This work suggests that polyglycerol-based block copolymers can be a new promising polymeric emulsifier for stabilization of nanoemulsions of various oils.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::87b3aa65fbc1bc5d037a3036af2a1227 https://doi.org/10.1007/s00396-015-3659-8 Zobrazit plný text záznamu Full text from SpringerLink