The schematic diagram of Automated Filter Tester, photographs of PI-N/MFA0 and reversible manual compression of PI-N/MFAs from Robust polyimide nano/microfibre aerogels welded by solvent-vapour for environmental applications

This ESM file has three supplementary figures. Fig. S1 showing experimental set-up for testing filtration efficiency. Fig. S2 showing photographs of PI-N/MFA0 prepared from different molds. Fig. S3 showing reversible manual compression of PI-N/MFAs (PI-N/MFA0, PI-N/MFA50 and PI-N/MFA100).