Preparation of liposomes composed of supercritical carbon dioxide-philic phospholipids using the rapid expansion of supercritical solution process

2021 ◽  
pp. 102568
Author(s):  
Yuexia Han ◽  
Jiangrui Cheng ◽  
Ningjie Ruan ◽  
Zhen Jiao
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Solution Process ◽  
Rapid Expansion ◽  
Supercritical Solution ◽  
Supercritical Carbon

scholarly journals Micronization of Cetirizine Using Rapid Expansion of Supercritical Carbon Dioxide

OALib ◽  
2015 ◽  
Vol 02 (04) ◽  
pp. 1-14 ◽  
Author(s):  
Ali Zeinolabedini Hezave ◽  
Mostafa Lashkarbolooki ◽  
Feridun Esmaeilzadeh
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Rapid Expansion ◽  
Supercritical Carbon

Preparation of Semi-Conducting Polymeric Nanoparticles by Supercritical Carbon Dioxide RESOLV Process

2008 ◽  
Vol 8 (9) ◽  
pp. 4707-4710 ◽  
Author(s):  
Hullathy Subban Ganapathy ◽  
Jun Ho Kim ◽  
Seung-Soo Hong ◽  
Kwon Taek Lim
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Polymeric Nanoparticles ◽  
High Surface ◽  
Sodium Dodecyl ◽  
Rapid Expansion ◽  
Environmentally Benign ◽  
Spherical Nanoparticles ◽  
Average Size ◽  
Supercritical Carbon

The rapid expansion of supercritical carbon dioxide solutions into a liquid solvent (RESOLV) technique with environmentally benign supercritical carbon dioxide was used to produce semi-conducting polymeric nanoparticles of fluoroalkyl ester substituted thiophenes. When the supercritical solutions of the conjugated polymer, poly[2-(3-thienyl) acetyl-3,3,4,4,5,5,6,6,7,7,8,8,8, tridecafluoro-1-octanate] (PSFTE) were expanded into aqueous solutions through a small capillarynozzle (150 μm), spherical nanoparticles in the range of 50–100 nm were obtained. However, after 15 min of expansion, the particles tended to aggregate to form larger objects due to the high surface energy of the polymeric nanoparticles. In order to prevent the agglomeration of particles, a relatively low concentration of sodium dodecyl sulphate (SDS) or NaCl was used as a stabilizing agent in aqueous solution. While NaCl did not give enough stabilization to the system, uniform spherical nanoparticles of PSFTE having an average size of 45 nm were successfully obtained by SDS stabilization.

Impregnation of Ru(cod)(tmhd)2 into PDMS Film in Supercritical Carbon Dioxide

2011 ◽  
Vol 418-420 ◽  
pp. 2260-2264
Author(s):  
Ming Lan Ge ◽  
Fu Chen Ding ◽  
Can Erkey
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Organometallic Compound ◽  
Fluid Phase ◽  
Constant Density ◽  
Pdms Film ◽  
Equilibrium Partition ◽  
Equilibrium Partition Coefficient ◽  
Supercritical Solution ◽  
Supercritical Carbon

Metallopolymer nanocomposites has attracted much attention recently. The impregnation of organometallic compound from the supercritical solution into the polymer matrix has several advantages. The impregnation process isotherm of bis(2,2,6,6-tetramethyl-3,5-heptanedionato) (1,5-cyclooctadiene) ruthenium (II) (Ru(cod)(tmhd)2) into polydimethylsiloxane (PDMS) film in supercritical carbon dioxide (scCO2) was investigated. The experiments for determining the isotherm were carried out at 40 °C and 10.34 MPa. It was found that the impregnation isotherm is linear up to the saturation concentration of the precursor in scCO2fluid phase. The slope of the linear curve defined equilibrium partition coefficient K provides a measure of the partitioning of Ru(cod)(tmhd)2between the PDMS film and scCO2fluid phase and it is constant under the same conditions. It showed that K is mainly govered by the density of scCO2and does not change much with temperature at a constant density of scCO2.

Sign in / Sign up

Export Citation Format

Share Document