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Immobilization of Air-Stable Copper Nanoparticles on Graphene Oxide Flexible Hybrid Films for Smart Clothes. Polymers (Basel) 2022; 14:polym14020237. [PMID: 35054646 PMCID: PMC8781742 DOI: 10.3390/polym14020237] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/22/2021] [Accepted: 01/04/2022] [Indexed: 01/27/2023] Open
Abstract
Through the use of organic/inorganic hybrid dispersants—which are composed of polymeric dispersant and two-dimension nanomaterial graphene oxide (GO)—copper nanoparticles (CuNPs) were found to exhibit nano stability, air-stable characteristics, as well as long-term conductive stability. The polymeric dispersant consists of branched poly(oxyethylene)-segmented esters of trimellitic anhydride adduct (polyethylene glycol−trimethylolpropane−trimellitic anhydride, designated as PTT). PTT acts as a stabilizer for CuNPs, which are synthesized via in situ polymerization and redox reaction of the precursor Cu(CH3COO)2 within an aqueous system, and use graphene oxide to avoid the reduction reaction of CuNPs. The results show that after 30 days of storage the CuNPs/PTT/GO composite film maintains a highly conductive network (9.06 × 10−1 Ω/sq). These results indicate that organic/inorganic PTT/GO hybrid dispersants can effectively maintain the conductivity stability of CuNPs and address the problem of CuNP oxidation. Finally, the new CuNPs/PTT/GO composite film was applied to the electrocardiogram (ECG) smart clothes. This way, a stable and antioxidant-sensing electrode can be produced, which is expected to serve as a long-term ECG monitoring device.
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Enhanced Piezoelectric Properties of Poly(Vinylidenefluoride-Co-Trifluoroethylene)/Carbon-Based Nanomaterial Composite Films for Pressure Sensing Applications. Polymers (Basel) 2020; 12:polym12122999. [PMID: 33339168 PMCID: PMC7765614 DOI: 10.3390/polym12122999] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/13/2020] [Accepted: 12/14/2020] [Indexed: 12/02/2022] Open
Abstract
In this study, heat and polarization treatments were applied to poly(vinylidenefluoride-co-trifluoroethylene (PVDF-TrFE) films to improve their crystallinity and piezoelectric effect. Carbon-based nanomaterials (CBNs) of multiple dimensions (i.e., modified zero-dimensional (0D) carbon black (OCB), one-dimensional (1D) modified carbon nanotubes (CNT–COOH) and two-dimensional (2D) graphene oxide (GO)) were added to the copolymer to study the effects of different CBN dimensions on the crystallinity and piezoelectric effect of PVDF-TrFE films. Additionally, amphiphilic polymeric dispersants were added to improve the dispersibility of CBNs; the dispersant was synthesized by the amidation, and imidization reactions of styrene-maleic anhydride copolymer (SMAz) and polyoxyalkylene amine (M1000). Polymer solutions with different ratios of CBN to dispersant (z = 10:1, 5:1, 1:1, 1:5, 1:10) were prepared. The enhanced dispersibility enabled the fluorine atoms in the PVDF-TrFE molecular chain to more efficiently form hydrogen bonds with the –COOH group in the CBN, thereby increasing the content of the β crystal phase (the origin of the piezoelectric effect) of the film. Therefore, the resulting film exhibited a higher output voltage on the application side and better sensitivity on the sensing element. The addition of CNT–COOH and polymeric dispersants increased the β-phase content in PVDF-TrFE from 73.6% to 86.4%, which in turn raised the piezoelectric coefficient from 19.8 ± 1.0 to 26.4 ± 1.3 pC/N. The composite film-based pressure sensor also exhibited a high degree of sensitivity, which is expected to have commercial potential in the future.
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Chiu CW, Li JW, Huang CY, Yang SS, Soong YC, Lin CL, Lee JCM, Lee Sanchez WA, Cheng CC, Suen MC. Controlling the Structures, Flexibility, Conductivity Stability of Three-Dimensional Conductive Networks of Silver Nanoparticles/Carbon-Based Nanomaterials with Nanodispersion and their Application in Wearable Electronic Sensors. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1009. [PMID: 32466225 PMCID: PMC7281189 DOI: 10.3390/nano10051009] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 01/17/2023]
Abstract
This research has successfully synthesized highly flexible and conductive nanohybrid electrode films. Nanodispersion and stabilization of silver nanoparticles (AgNPs) were achieved via non-covalent adsorption and with an organic polymeric dispersant and inorganic carbon-based nanomaterials-nano-carbon black (CB), carbon nanotubes (CNT), and graphene oxide (GO). The new polymeric dispersant-polyisobutylene-b-poly(oxyethylene)-b-polyisobutylene (PIB-POE-PIB) triblock copolymer-could stabilize AgNPs. Simultaneously, this stabilization was conducted through the addition of mixed organic/inorganic dispersants based on zero- (0D), one- (1D), and two-dimensional (2D) nanomaterials, namely CB, CNT, and GO. Furthermore, the dispersion solution was evenly coated/mixed onto polymeric substrates, and the products were heated. As a result, highly conductive thin-film materials (with a surface electrical resistance of approximately 10-2 Ω/sq) were eventually acquired. The results indicated that 2D carbon-based nanomaterials (GO) could stabilize AgNPs more effectively during their reductNion and, hence, generate particles with the smallest sizes, as the COO- functional groups of GO are evenly distributed. The optimal AgNPs/PIB-POE-PIB/GO ratio was 20:20:1. Furthermore, the flexible electrode layers were successfully manufactured and applied in wearable electronic sensors to generate electrocardiograms (ECGs). ECGs were, thereafter, successfully obtained.
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Affiliation(s)
- Chih-Wei Chiu
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; (J.-W.L.); (C.-Y.H.); (S.-S.Y.); (Y.-C.S.); (C.-L.L.); (J.C.-M.L.); (W.A.L.S.)
| | - Jia-Wun Li
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; (J.-W.L.); (C.-Y.H.); (S.-S.Y.); (Y.-C.S.); (C.-L.L.); (J.C.-M.L.); (W.A.L.S.)
| | - Chen-Yang Huang
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; (J.-W.L.); (C.-Y.H.); (S.-S.Y.); (Y.-C.S.); (C.-L.L.); (J.C.-M.L.); (W.A.L.S.)
| | - Shun-Siang Yang
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; (J.-W.L.); (C.-Y.H.); (S.-S.Y.); (Y.-C.S.); (C.-L.L.); (J.C.-M.L.); (W.A.L.S.)
| | - Yu-Chian Soong
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; (J.-W.L.); (C.-Y.H.); (S.-S.Y.); (Y.-C.S.); (C.-L.L.); (J.C.-M.L.); (W.A.L.S.)
| | - Chih-Lung Lin
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; (J.-W.L.); (C.-Y.H.); (S.-S.Y.); (Y.-C.S.); (C.-L.L.); (J.C.-M.L.); (W.A.L.S.)
| | - Jimmy Chi-Min Lee
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; (J.-W.L.); (C.-Y.H.); (S.-S.Y.); (Y.-C.S.); (C.-L.L.); (J.C.-M.L.); (W.A.L.S.)
| | - William Anderson Lee Sanchez
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; (J.-W.L.); (C.-Y.H.); (S.-S.Y.); (Y.-C.S.); (C.-L.L.); (J.C.-M.L.); (W.A.L.S.)
| | - Chih-Chia Cheng
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan;
| | - Maw-Cherng Suen
- Department of Fashion Business Administration, LEE-MING Institute of Technology, New Taipei City 24305, Taiwan;
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Facile Fabrication of Flexible Electrodes and Immobilization of Silver Nanoparticles on Nanoscale Silicate Platelets to Form Highly Conductive Nanohybrid Films for Wearable Electronic Devices. NANOMATERIALS 2019; 10:nano10010065. [PMID: 31892169 PMCID: PMC7022526 DOI: 10.3390/nano10010065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 12/20/2019] [Accepted: 12/24/2019] [Indexed: 11/16/2022]
Abstract
This study investigated films with remarkably high electrical conductivity after they were easily prepared from organic/inorganic nanohybrid solutions containing an organic polymeric dispersant and two-dimensional nanoscale silicate platelets as the inorganic stabilizer dispersed with silver nanoparticles. Transmission electron microscopy shows that the production of silver nanoparticles synthesized by the in situ chemical reduction of AgNO3 in an aqueous solution by N,N-dimethylformamide results in an average silver nanoparticle diameter of circa 20 nm. Thin films of silver nanoparticles were prepared on a 1-μm-thick film with a low sheet resistance of 8.24 × 10-4 Ω/sq, achieved through the surface migration of silver nanoparticles and prepared by sintering at 300 °C to form an interconnected network. This was achieved with a silver nanoparticle content of 5 wt%, using nanoscale silicate platelets/polyoxyethylene-segmented polyimide/AgNO3 at a weight ratio of 1:10:35. During sintering, the color of the hybrid film changed from gold to milky white, suggesting the migration of silver nanoparticles and the formation of an interconnected network. The results show promise for the fabrication of novel silver-based electrocardiogram electrodes and a flexible wireless electrocardiogram measurement system for wearable electronics.
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Gao YZ, Chang TX, Wu YX. In-situ synthesis of acylated sodium alginate-g-(tetrahydrofuran5-b-polyisobutylene) terpolymer/Ag-NPs nanocomposites. Carbohydr Polym 2019; 219:201-209. [PMID: 31151517 DOI: 10.1016/j.carbpol.2019.04.087] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/23/2019] [Accepted: 04/29/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Yu-Zhuang Gao
- State Key Laboratory of Chemical Resource Engineering, College of Material Science and Engineering, Beijing University of Chemical Technology, 15 North 3th-Ring East Road, Chaoyang District, Beijing, 100029, PR China.
| | - Tian-Xiao Chang
- State Key Laboratory of Chemical Resource Engineering, College of Material Science and Engineering, Beijing University of Chemical Technology, 15 North 3th-Ring East Road, Chaoyang District, Beijing, 100029, PR China.
| | - Yi-Xian Wu
- State Key Laboratory of Chemical Resource Engineering, College of Material Science and Engineering, Beijing University of Chemical Technology, 15 North 3th-Ring East Road, Chaoyang District, Beijing, 100029, PR China.
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Chiu CW, Lee YC, Ou GB, Cheng CC. Controllable 3D Hot-Junctions of Silver Nanoparticles Stabilized by Amphiphilic Tri-block Copolymer/Graphene Oxide Hybrid Surfactants for Use as Surface-Enhanced Raman Scattering Substrates. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b03504] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chih-Wei Chiu
- Department
of Materials Science and Engineering, and ‡Graduate Institute of Applied Science
and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Yen-Chen Lee
- Department
of Materials Science and Engineering, and ‡Graduate Institute of Applied Science
and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Gang-Bo Ou
- Department
of Materials Science and Engineering, and ‡Graduate Institute of Applied Science
and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Chih-Chia Cheng
- Department
of Materials Science and Engineering, and ‡Graduate Institute of Applied Science
and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
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