Cellulose gel dispersion: From pure hydrogel suspensions to encapsulated oil-in-water emulsions.

Autor: Napso S; Faculty of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel. Electronic address: sofiana234@gmail.com., Rein DM; Faculty of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel. Electronic address: cerycdr@tx.technion.ac.il., Khalfin R; Faculty of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel. Electronic address: rafail@tx.technion.ac.il., Kleinerman O; Faculty of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel. Electronic address: olgak@technion.ac.il., Cohen Y; Faculty of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel. Electronic address: yachinc@tx.technion.ac.il.
Jazyk: angličtina
Zdroj: Colloids and surfaces. B, Biointerfaces [Colloids Surf B Biointerfaces] 2016 Jan 01; Vol. 137, pp. 70-6. Date of Electronic Publication: 2015 May 27.
DOI: 10.1016/j.colsurfb.2015.05.039
Abstrakt: Cellulose hydrogel particles were fabricated from molecularly-dissolved cellulose/IL solutions. The characteristics of the formed hydrogels (cellulose content, particles' size and porosity) were determined as a function of cellulose concentration in the precursor solutions. There is a significant change in the hydrogel structure when the initial cellulose solution concentration increases above about 7-9%wt. These changes include increase of the cellulose content in the hydrogel, and decrease in its pore size. The finest cellulose particle dispersions can be obtained using low concentration cellulose/IL solutions (cellulose concentration in dispersion less than 2%wt.) or hydrogels (concentration less than 1%wt.) in a dispersing medium consisting of IL with no more than 20%wt. water. Stable paraffin oil-in-water emulsions are achieved by mixing oil and water with cellulose/IL solutions. The optimal conditions for obtaining the finest particles (about 20μm in diameter) are attained using cellulose solutions of concentration between 0.7 and 4%wt. at temperature of 70°C and oil/cellulose mass ratios between 1 and 1.5.
(Copyright © 2015 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: