Flexible 3D Printed Acrylic Composites based on Polyaniline/Multiwalled Carbon Nanotubes for Piezoresistive Pressure Sensors

被引:12
|
作者
Arias-Ferreiro, Goretti [1 ]
Lasagabaster-Latorre, Aurora [2 ]
Ares-Pernas, Ana [1 ]
Sonia Dopico-Garcia, M. [1 ]
Pereira, N. [3 ,4 ]
Costa, P. [3 ,4 ]
Lanceros-Mendez, S. [3 ,5 ,6 ]
Abad, Maria-Jose [1 ]
机构
[1] Univ A Coruna, Grp Polimeros CIT, Campus Ind Ferrol, Ferrol 15403, Spain
[2] Univ Complutense Madrid, Dept Quim Organ 1, Fac Opt & Optometria, Arcos Jalon 118, Madrid 28037, Spain
[3] Univ Minho, Phys Ctr Minho & Porto Univ CF UM UP, P-4710057 Braga, Portugal
[4] LapMET, Lab Phys Mat & Emergent Technol, P-02097 Lisbon, Portugal
[5] Univ Basque Country, BCMat, Basque Ctr Mat Applicat & Nanostruct, Sci Pk, Leioa 48940, Spain
[6] Ikerbasque, Basque Fdn Sci, Bilbao 48009, Spain
来源
ADVANCED ELECTRONIC MATERIALS | 2022年 / 8卷 / 12期
关键词
digital light processing; flexible electronics; multi-walled carbon nanotubes; piezoresistive pressure sensors; polyaniline; stereolithography; ELECTROMECHANICAL PROPERTIES; CORROSION PROTECTION; POLYANILINE; NANOCOMPOSITES; PHOTOPOLYMERS; FABRICATION; ADDITIVES; GRAPHENE;
D O I
10.1002/aelm.202200590
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The development of tunable UV-curable polymeric composites for functional applications, taking into consideration environmental issues and additive manufacturing technologies, is a research topic with relevant challenges yet to be solved. Herein, acrylic composites filled with 0-3 wt.%. polyaniline/ multiwalled carbon nanotubes (PANI/MWCNT) are prepared by Digital Light Processing (DLP) in order to tailor morphology, thermal, mechanical, and electromechanical properties. Viscosity, real-time infrared spectroscopy, and cure depth tests allow optimizing resin composition for suitable DLP printing. 2 wt.% is the maximum filler content reproducibly embedded in the polymer matrix. The advantages of PANI/MWCNT (50/50 wt.%) compared with single-component composites include safety issues, enhanced printability, increased electrical conductivity and thermal stability, and lower electrical percolation threshold (0.83 wt.%). Above this threshold the composites display excellent piezoresistive response, no hysteresis, and stability for over 400 compression cycles. The pressure sensibility (PS) of 2 wt.% composites decreases with applied pressure from PS approximate to 15 to 0.8 Mpa(-1) for maximum pressures of 0.02 and 0.57 MPa, respectively. A proof-of-concept of the functionality of the novel materials is developed in the form of a tactile sensor, demonstrating their potential for pressure sensing applications as cost-effective, sustainable, and flexible materials for printed electronics.
引用
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页数:13
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