Fabrication and interfacial characteristics of surface modified Ag nanoparticle based conductive composites

Wu, Y; Liao, LD; Pan, HC; He, L; Lin, CT; Tan, MC

Fabrication and interfacial characteristics of surface modified Ag nanoparticle based conductive composites

Wu, Y Liao, LD Pan, HC He, L Lin, CT

Tan, MC

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Publication Type:: Journal Article
Citation:: RSC Advances, 2017, 7 (47), pp. 29702 - 29712
Issue Date:: 2017-01-01

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Field	Value	Language
dc.contributor.author	Wu, Y	en_US
dc.contributor.author	Liao, LD	en_US
dc.contributor.author	Pan, HC	en_US
dc.contributor.author	He, L	en_US
dc.contributor.author	Lin, CT https://orcid.org/0000-0001-8371-8197	en_US
dc.contributor.author	Tan, MC	en_US
dc.date.issued	2017-01-01	en_US
dc.identifier.citation	RSC Advances, 2017, 7 (47), pp. 29702 - 29712	en_US
dc.identifier.uri	http://hdl.handle.net/10453/124041
dc.description.abstract	© 2017 The Royal Society of Chemistry. The recent emergence of wearable electronics has driven the advancements of flexible and elastic conductive metal-polymer composites as electrodes and sensors. Surface modification of the conductive metal fillers are required to achieve a good dispersion within the matrix to obtain suitable conductivity and sensing properties. Additionally, it would be critical to ensure that the inclusion of these fillers does not affect the curing of the pre-polymers so as to ensure sufficient filler loading to form functional composites. In this work, a one-step approach is used to modify Ag-PAA nanoparticles via hydrogen bonds to form PAA-PVP complex modified Ag nanoparticles. The interfacial characteristics and thermal stability of these surface-modified Ag nanoparticles were studied to elucidate the underlying chemistries that governed the surface modification process. After surface modification, we successfully improved the dispersion of Ag nanoparticles and enabled curing of PDMS to higher Ag loadings of ∼25 vol%, leading to much lower electrical resistivity of ∼6 Ω cm. Our studies also showed that Ag nanoparticles modified at a PAA/PVP molar ratio of 1:10 resulted in a minimal particle aggregation. In a preliminary testing of our conductive composites as electrodes, clear electrocardiography signals were obtained. The facile surface modification method introduced here can be adapted for other systems to modify the particle interfacial behavior and improve the filler dispersion and loading without adversely affecting the polymer curing chemistry.	en_US
dc.relation.ispartof	RSC Advances	en_US
dc.relation.isbasedon	10.1039/c7ra04657j	en_US
dc.title	Fabrication and interfacial characteristics of surface modified Ag nanoparticle based conductive composites	en_US
dc.type	Journal Article
utslib.citation.volume	47	en_US
utslib.citation.volume	7	en_US
utslib.for	0303 Macromolecular and Materials Chemistry	en_US
utslib.for	03 Chemical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Computer Science
pubs.organisational-group	/University of Technology Sydney/Strength - CAI - Centre for Artificial Intelligence
utslib.copyright.status	open_access
pubs.issue	47	en_US
pubs.publication-status	Published	en_US
pubs.volume	7	en_US

Abstract:

© 2017 The Royal Society of Chemistry. The recent emergence of wearable electronics has driven the advancements of flexible and elastic conductive metal-polymer composites as electrodes and sensors. Surface modification of the conductive metal fillers are required to achieve a good dispersion within the matrix to obtain suitable conductivity and sensing properties. Additionally, it would be critical to ensure that the inclusion of these fillers does not affect the curing of the pre-polymers so as to ensure sufficient filler loading to form functional composites. In this work, a one-step approach is used to modify Ag-PAA nanoparticles via hydrogen bonds to form PAA-PVP complex modified Ag nanoparticles. The interfacial characteristics and thermal stability of these surface-modified Ag nanoparticles were studied to elucidate the underlying chemistries that governed the surface modification process. After surface modification, we successfully improved the dispersion of Ag nanoparticles and enabled curing of PDMS to higher Ag loadings of ∼25 vol%, leading to much lower electrical resistivity of ∼6 Ω cm. Our studies also showed that Ag nanoparticles modified at a PAA/PVP molar ratio of 1:10 resulted in a minimal particle aggregation. In a preliminary testing of our conductive composites as electrodes, clear electrocardiography signals were obtained. The facile surface modification method introduced here can be adapted for other systems to modify the particle interfacial behavior and improve the filler dispersion and loading without adversely affecting the polymer curing chemistry.

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http://hdl.handle.net/10453/124041