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

作者：Ganapathy Hullathy Subban; Kim Jun Ho; Hong Seung Soo; Lim Kwon Taek^*

来源：Journal of Nanoscience and Nanotechnology, 2008, 8(9): 4707-4710.

DOI：10.1166/jnn.2008.IC13

• Supercritical CO2
• Semi-Conducting Polymers
• Nanoparticles
• RESOLV

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 capillary nozzle (150 mu m), 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 (SIDS) 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 SIDS stabilization.

• 出版日期2008-9