Figure S4
Relaxation of electric charge. When Novec 7300 flows into a melamine sponge, the melamine sponge becomes positively charged and Novec 7300 becomes negatively charged. When Novec 7300 flows into the positively charged melamine sponge, the opposite sign charges recombine with each other and the amount of charge decreases. We guess that relaxation of charge due to recombination to be the reason for the decrease in charge generation when the contact time is long.