Novel flexible pvdf-trfe and pvdf-trfe/zno pressure sensor: Fabrication, characterization and investigation

Liu，Mingran1; Liu，Yang1; Zhou，Limin2

2021-05-23

10.3390/mi12060602

Micromachines   影响因子和分区

2072-666X

With the development of human healthcare devices, smart sensors, e-skins, and pressure sensors with outstanding sensitivity, flexibility, durability and biocompatibility have attracted more and more attention. In this paper, to develop a novel flexible pressure sensor with high sensitivity, different poly (vinylidene fluoride-trifluoroethylene) (PVDF-TrFE)-based composite membranes were fabricated, characterized and tested. To improve the β-phase crystallinity and piezoelectricity of the membranes, and for the purpose of comparison, nano ZnO particles with different concentrations (99:1, 9:1 in a weight ratio of PVDF-TrFE to ZnO) were, respectively added into PVDF-TrFE polymer acting as a nucleating agent and dielectric material. To facilitate the formation of β-phase crystal, the membranes were fabricated by electrospinning method. After the electrospinning, an annealing process was conducted to the fabricated membranes to increase the size and content of β-phase crystal. Then, the fabricated PVDF-TrFE membranes, acting as the core sensing layer, were, respectively built into multiple prototype sensors in a sandwich structure. The sensitivity of the prototype sensors was tested by an auto-clicker. The stimulation of the auto-clicker on the prototype sensors generated electrical signals, and the electrical signals were collected by a self-built testing platform powered by LabVIEW. As a result, combining the addition of ZnO nanofillers and the annealing process, a highly sensitive pressure sensor was fabricated. The optimal peak-to-peak voltage response generated from the prototype sensor was 1.788 V which shows a 75% increase compared to that of the pristine PVDF-TrFE sensor. Furthermore, a human pulse waveform was captured by a prototype sensor which exhibits tremendous prospects for application in healthcare devices.

Human pulsation sensor PVDF-TrFE PVDF-TrFE/ZnO β phase crystal

SCI ; EI

英语

其他

WOS:000666922900001

20212310471860

Annealing ; Biocompatibility ; Composite membranes ; Crystallinity ; Crystallography ; Crystals ; Dielectric materials ; Electrospinning ; Fluorine compounds ; Health care ; II-VI semiconductors ; Membranes ; Oxide minerals ; Pressure sensors ; Zinc oxide

Health Care:461.7 ; Immunology:461.9.1 ; Minerals:482.2 ; Heat Treatment Processes:537.1 ; Dielectric Materials:708.1 ; Inorganic Compounds:804.2 ; Fiber Chemistry and Processing:819.3 ; Crystalline Solids:933.1 ; Pressure Measuring Instruments:944.3 ; Materials Science:951

2-s2.0-85107271148

Scopus

1.Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hung Hom, Kowloon,Hong Kong
2.School of System Design and Intelligent Manufacturing,Southern University of Science and Technology,Shenzhen,Xueyuan Road 1088,518055,China

Liu，Mingran,Liu，Yang,Zhou，Limin. Novel flexible pvdf-trfe and pvdf-trfe/zno pressure sensor: Fabrication, characterization and investigation[J]. Micromachines,2021,12(6).

Liu，Mingran,Liu，Yang,&Zhou，Limin.(2021).Novel flexible pvdf-trfe and pvdf-trfe/zno pressure sensor: Fabrication, characterization and investigation.Micromachines,12(6).

Liu，Mingran,et al."Novel flexible pvdf-trfe and pvdf-trfe/zno pressure sensor: Fabrication, characterization and investigation".Micromachines 12.6(2021).