Using Hansen solubility parameters to correlate solubility of C-60 fullerene in organic solvents and in polymers

The solubility of C-60 Fullerene has been correlated with Hansen solubility parameters (HSP) in a database of 89 organic solvents. The parameters delta(D), delta(P), and delta(H) for C-60 were determined as 19.7, 2.9, and 2.7, respectively, with units MPa1/2. These parameters are indicative of an essentially nonpolar solid, and have been used to identify 55 additional predicted good solvents for C-60. Under the assumption that polymers with similar HSP to C-60 itself will show enhanced compatibility with C-60, 30 polymers that have the highest predicted solubility affinity for C-60 have been selected from a HSP database of polymeric materials. There is a tendency for those polymers with greatest affinity for C-60 to have the same types of functional groups as the better solvents. These include aromatic rings and atoms significantly larger than carbon, such as chlorine and sulfur. (C) 2004 Elsevier Ltd. All rights reserved.