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Novel Semiconducting Polymer Particles by Supercritical Fluid Process
Lim, Kwon Taek,Subban, Ganapathy Hullathy,Hwang, Ha Soo,Kim, Jung Taek,Ju, Chang Sik,Johnston, Keith P. WILEY-VCH Verlag 2005 Macromolecular Rapid Communications Vol.26 No.22
<P>Summary: A simple method to prepare surfactant-free and solvent-free semiconducting polymer particles by using an environmentally benign supercritical carbon dioxide (scCO<SUB>2</SUB>) process is reported. The process of the rapid expansion of supercritical solutions (RESS) is used to produce spherical particles of poly[2-(3-thienyl)acetyl 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctanoate] (PSFTE), 50–500 nm in size, from 0.1–0.5 wt.-% PSFTE solutions in CO<SUB>2</SUB> at pre-expansion temperatures of 40 °C and pre-expansion pressures of 276 bar.</P><P> <img src='wiley_img/10221336-2005-26-22-MARC200500438-gra001.gif' alt='wiley_img/10221336-2005-26-22-MARC200500438-gra001'> Graphic An FESEM image of PSFTE particles produced by the RESS process with CO<SUB>2</SUB>. </P>
Kim, Jin Ho,Jung, Jae Mok,Kwak, Jun Young,Hwang, Tai Kyung,Ganapathy, Hullathy Subban,Jeong, Yeon Tae,Lim, Kwon Taek American Scientific Publishers 2011 Journal of Nanoscience and Nanotechnology Vol.11 No.1
<P>A new method for preparing flexible, transparent, and conductive multiwalled carbon nanotube (MWCNT) hybrid films with scratch resistance through a facile UV-curing method is described herein. UV-curable urethane oligomers were used as the binder between the MWCNTs and the plastic substrates. The transparency and sheet resistance of MWCNT thin films can be easily tailored by controlling the number of bar coaters. Composite films with different binder ratios were prepared to evaluate and optimize the surface abrasion resistance and adhesion parameter. Two types of MWCNT films, those with a 56% (with a 586 komega/sq sheet resistance) and a 78% transmittance (with a 22 Momega/sq sheet resistance) were obtained using the UV-curable resin, and the conductive films showed distinguished abrasion resistance and good adhesion.</P>