posted on 2021-11-01, 16:04authored byMaryanne E Spiers, David J Nielsen, Karl D Pavey, Yen B Truong, Gregory C Rutledge, Peter Kingshott, Daniel S Eldridge
A novel dissolution method that allows
for the total solvation
of high-concentration, high-molecular-weight polyaniline (PANi) doped
with (+)-camphor-10-sulfonic acid (CSA) is reported. Preparation of
12–16 wt % 65,000 Da PANi solutions in N,N-dimethylformamide is achievable using a simple one-pot
method. Doped polyaniline solutions in common organic solvents were
processed into nanofibers using a convenient single-nozzle electrospinning
technique. The electrospinning of PANi-CSA into nanofibrous membranes
generated substrates that were subsequently employed in colorimetric
gas sensing. These substrates demonstrated linearity of response upon
exposure to 50–5500 ppm ammonia at ambient (50 ± 10% RH)
and high (80% RH) humidity.