A variety of materials are soluble in supercritical dioxide.  (RDC 2/8/2011)

Materials   
Supercritical Carbon Dioxide 

Recent Journal Articles

2/4/2011
Experimental and modeling studies on the solubility of sub- and supercritical carbon dioxide (scCO2) in potato starch and derivatives
(28–36)
Polymer  Engineering &  Science 51 #1 (2011)
Muljana et al of the University of Groningen, Netherlands measured the solubility of CO2 in native potato starch (NPS) and potato starch acetate(SA) and found a maximum solubility of 31 mg CO2/gsample for NPS and 79.4 mg CO2/gsample for SA.  The CO2 sorption behavior depends on the temperature and pressure.  (RDC 2/2/2011)