Table 3.

Regression equations for the dependence of the mass% of dissolved silk fibroin (SF-m%) on the dissolution temperature (T) and the mole fraction of DMSO in the binary solvent, χ_DMSO, using reduced variable values, and a second-order polynomial fit.

Entry	IL	Regression Equation	R2
1	BuMeImAcO	SF-m% = 2.85 + 19.25T − 10.75T2 + 10.08(χDMSO) − 11.75(χDMSO)2 − 3.0 T·(χDMSO)	0.978
2	C3OMeImAcO	SF-m% = 1.30 + 13.78T − 1.50T2 + 10.98(χDMSO) − 11.50(χDMSO)2 − 5.70T·(χDMSO)	0.962
3	AlBzMe2NAcO	SF-m% = −0.11 + 1.35T + 5.60T2 + 7.38(χDMSO) − 6.60(χDMSO)2 − 2.90T·(χDMSO)	0.929
4	Bu4NAcO	SF-m% = −0.39 + 4.52T + 10.15T2 + 7.18(χDMSO) − 6.25(χDMSO)2 − 3.20 T·(χDMSO)	0.979

R² is the regression correlation coefficient.