Fabrication And Characterization Of Graphene-Based Ink
The main aim of the present study is to develop graphene-based ink with excellent stability, electrical and physical properties for printing electronics by utilizing spray coating and inkjet printing techniques. Firstly, comparison on the different types of graphene-like materials showed that gra...
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| 主要作者: | |
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| 格式: | Thesis |
| 语言: | English |
| 出版: |
2019
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| 主题: | |
| 在线阅读: | http://eprints.usm.my/47845/1/Fabrication%20And%20Characterization%20Of%20Graphene-Based%20Ink.pdf |
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| 总结: | The main aim of the present study is to develop graphene-based ink with excellent
stability, electrical and physical properties for printing electronics by utilizing spray
coating and inkjet printing techniques. Firstly, comparison on the different types of
graphene-like materials showed that graphene foam (GF) exhibited the highest surface
area with the value of 2136 m2g-1. Meanwhile, graphite nanoplatelets (GNPs) and
synthetic graphite (SG) displayed highly crystalline structures with the presence of
sharp and narrow (002) peak, and high-quality particles with lower ID/IG ratio.
Secondly, results showed that viscosity and contact angle of the conductive inks
increased significantly with increasing GF, GNPs and SG filler loadings in a polyester
varnish (PV) binder. The incorporation of 10 vol.% GNPs improved the electrical
conductivity of PV by 186 %, and only 40 % for SG and 10 % for GF at the same filler
loading. Next, it is found that GNPs dispersed in ethylene glycol (EG) exhibited better
stability with 85 % decrement of the initial concentration after a month, viscosity and
wettability than those of propylene glycol (PG) and 2-propanol (IPA). On the other
hand, GF dispersed in IPA:EG mixed solvent at ratio of 1:1 showed only 50 %
decrement from the initial concentration after a month compared to those of GNPs inks
at the same mixed ratio. In the last part, GF/poly(3,4-ethylenedioxythiophene)
poly(styrenesulfonate) (PEDOT:PSS) hybrid ink exhibited better stability than GF ink
and GF/silver nanoparticles (AgNPs) hybrid ink where the ink showed 30 % decrement
from the concentration after a month, 100 % improvement in surface conductivity at
50 printed layers and gauge factor of 4.3. As a conclusion, printed GF/PEDOT:PSS
hybrid ink has the potential to be used for strain sensor applications. |
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