%0 Journal Article
%A Arias-Ferreiro, Goretti
%A Ares-Pernas, Ana
%A Lasagabaster Latorre, Aurora
%A Dopico-García, M. Sonia
%A Ligero, Pablo
%A Pereira, N.
%A Costa, P.
%A Lanceros-Méndez, S.
%A Abad Martínez, María José
%T Photocurable printed piezocapacitive pressure sensor based on an acrylic resin modified with polyaniline and lignin
%D 2022
%@ 2365-709X
%U https://hdl.handle.net/20.500.14352/116341
%X The design of suitable materials for the manufacture of pressure sensors withhigh sensitivity and flexibility in wearable electronics is still a challenge. In thisstudy, a flexible and portable pressure sensor is developed based on a pho-topolymeric formulation of polyaniline (PANI)/Lignin/acrylate. The amountof photoinitiator and the presence of lignin within the filler are investigated toobtain the best printability and capacitive response. Low PANI contents drasti-cally increase the dielectric constant and 4 wt% photoinitiator improves thesignal and sensitivity. A sensitivity of 0.012 kPa–1 is achieved in a linear range(0–10 kPa) with only 3.5 wt% PANI. Lignin improves both the dispersion of thefiller within the matrix and the printability of the resin, due to lower absorptivityat the UV wavelength of the 3D printer. Thus, the PANI-Lignin filler is selectedfor the fabrication of a piezocapacitive prototype transducer. The pressuretransducer demonstrate its practical application by responding to a humanfootfall and transmitting its corresponding electrical signal. This study showsthe enhanced properties of lignin modified PANI acrylate composites. Basedon lignin, an abundant natural waste, a sustainable photocurable cost-effectivepolymer is proposed for the fabrication of printable, wearable electronics.
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