Formation of well-defined spherical particles during suspension polymerization of biodegradable poly(glycolide-co-p-dioxanone) in supercritical carbon dioxide

RSC Advances ◽  
2012 ◽  
Vol 2 (27) ◽  
pp. 10365 ◽  
Author(s):  
Tianqiang Wang ◽  
Jianyuan Hao ◽  
Yu Liu ◽  
Zhongwei Gu
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Suspension Polymerization ◽  
Spherical Particles ◽  
Biodegradable Poly ◽  
Supercritical Carbon

Suspension Polymerization of Poly(l-lactide-co-p-dioxanone) in Supercritical Carbon Dioxide

2011 ◽  
Vol 20 (1) ◽  
pp. 157-163 ◽  
Author(s):  
Tianqiang Wang ◽  
Jing Ding ◽  
Xiuli Zhao ◽  
Yu Liu ◽  
Jianyuan Hao
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Suspension Polymerization ◽  
Supercritical Carbon

Synthesis of Biodegradable Poly-ε-caprolactone Microspheres by Dispersion Ring-Opening Polymerization in Supercritical Carbon Dioxide

2008 ◽  
Vol 9 (11) ◽  
pp. 3141-3149 ◽  
Author(s):  
Bruno Grignard ◽  
Fabrice Stassin ◽  
Cédric Calberg ◽  
Robert Jérôme ◽  
Christine Jérôme
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Biodegradable Poly ◽  
Supercritical Carbon

scholarly journals Nanospheres Prepared by Self-Assembly of Random Copolymers in Supercritical Carbon Dioxide

2012 ◽  
Vol 2012 ◽  
pp. 1-16 ◽  
Author(s):  
Eri Yoshida
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Self Assembly ◽  
Dicarboxylic Acids ◽  
Ethyl Acrylate ◽  
Spherical Particles ◽  
Random Copolymers ◽  
Nmr Studies ◽  
Point Pressure ◽  
Supercritical Carbon

The synthesis of spherical particles was attained by the direct self-assembly of poly[2-(perfluorooctyl)ethyl acrylate-random-acrylic acid], P(POA-r-AA), and by the indirect self-assembly poly[POA-random-2-(dimethylamino)ethyl acrylate], P(POA-r-DAA), with dicarboxylic acids in supercritical carbon dioxide (scCO2). The copolymers formed spherical particles with hundreds of nanometer diameters in a heterogeneous state at pressures lower than the cloud point pressure. The formation of spherical particles was also dependent on the temperature. The formation of spherical particles could be optimized through varying the solvent quality by the manipulation of the CO2pressure and temperature for the different copolymer compositions. The dynamic light scattering and1H NMR studies demonstrated that the nanospheres had the micellar structures consisting of the CO2-philic POA shells and the CO2-phobic AA or DAA cores including the main chain cores. The nanospheres produced the superhydrophobic surfaces based on the water-proof shells of the POA units.

Sign in / Sign up

Export Citation Format

Share Document