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(a) FTIR of PI/PTFE–PAI NAs sintered at different temperatures as PAA/PTFE–PAI was 5:5 and the fiber content was 1.0%; (b) the DSC curve of PAA, PI, PTFE–PAI–PEO, and PTFE–PAI nanofiber; (c) the TG curves of PTFE NPs, PAI polymer, and PTFE–PEO, PAA, PI, PI/PTFE–PAI nanofiber.
