Development of ionic conductive cellulose mat by solution blow spinning and laser-induced graphene from pineapple nanocellulose for use in flexible electronic devices
Abstract
In the face of environmental issues and aiming at electronic devices of
rapid production at low cost, this doctoral thesis proposed two new and
innovative approaches to obtain substrates, dielectrics, and electrodes from a
single biopolymer: cellulose. In a first moment, a simple approach to produce
low-cost flexible ionic conductive cellulose mats (ICCMs) using solution blow
spinning (SB-Spinning) is reported. The electrochemical properties of the
ICCMs were adjusted through infiltration with alkali hydroxides (LiOH, NaOH, or
KOH), which enabled of ICCMs application as dielectric and substrate in oxidebased field effect transistors (FETs) and pencil-drawn resistor-loaded inverters.
The FETs showed good electrical performance under operating voltage <2.5 V,
which was strictly associated with the type of alkali ion incorporated, presenting
satisfactory performance for the ICCM infiltrated with K+ ion. The inverters with
K+ ions also presented good dynamic performance, with a gain close to 2.
Regarding the cellulose-based electrodes, a second innovative approach is
reported to synthetize laser-induced graphene (LIG) structures from
carboxymethyl cellulose (CMC)-based ink containing LIG obtained from
cellulose nanocrystals (CNCs) extracted from pineapple leaf fibers (PALFs). To
prove this concept, zinc oxide ultraviolet (ZnO UV) sensors were designed
varying the amount of LIG from CNCs. Sensor obtained from LIG written directly
on paper substrate were also performed. The ZnO UV sensors designed with
CMC-based ink showed responsivity 40-fold higher than that of paper directwritten LIG, as well as excellent electrical performance under flexion. These
findings may open new promising possibilities for low-consumption wearable
electronics, allowing the use of concepts such as the "Internet of Things" and
opening the possibility of generating 100% organic cellulose-produced
electronic devices.
Collections
The following license files are associated with this item: