Fig. 5. Interaction between butanol and PEI/PAA CCs. (A) Distribution coefficients of butanol in PEI/PAA CCs as a function of CC composition shown as an average with standard deviation with n = 2. (B) Distribution of butanol as a function of temperature for F⁻ = 0.26 and 0.36. For (A) and (B), the total polyion concentration was 5 g L⁻¹, the NaCl concentration was 10 mM, and the butanol concentration was 400 mM. (C) Image of PEI/PAA CC at 50 g L⁻¹ with (left) and without (right) the aqueous supernatant. (D) Butanol remaining in the CC at F⁻ = 0.26 during RT to 70 °C extraction and 70 °C to RT back-extraction. Data are shown as average with n = 4.