Transparent Conductive Thin Film Synthesis Based on Single-Walled Carbon Nanotubes Dispersion Containing Polymethylmethacrylate Binder

Jung, Hyuck; An, Sea Yong; Lim, Ju Seong; Kim, Dojin

doi:10.1166/jnn.2011.4439

Cited by 11 publications

(7 citation statements)

References 7 publications

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“…A lack of chemical and mechanical stability in the functional films limits their applications, whereas film robustness extends the device lifetime. Several physical treatments have been tested to boost the CNT-TCF adhesion, such as the use of acrylic binders, 11 deposition of an interlayer, 12 hot pressing transfer process, 13 and microwave irradiation, 14 to name a few. Azoubel and Magdassi improved the adhesion of single-walled carbon nanotubes (SWCNTs) deposited on poly(ethylene terephthalate) (PET) by dipping in various acids, including nitric acid.…”

Section: Introductionmentioning

confidence: 99%

Chemical Postdeposition Treatments To Improve the Adhesion of Carbon Nanotube Films on Plastic Substrates

et al. 2019

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The robust adhesion of single-walled carbon nanotubes (SWCNTs) to plastic substrates is a key issue toward their use in flexible electronic devices. In this work, semitransparent SWCNT films were prepared by spray-coating on two different plastic substrates, specifically poly(ethylene terephthalate) and poly(vinylidene fluoride). The deposited SWCNT films were treated by dipping in suitable solvents separately, namely, 53% nitric acid (HNO 3 ) and N -methyl pyrrolidone. Direct evidence of SWCNT adhesion to the substrate was obtained by a peel-off test carried out with an adhesive tape. Moreover, these treatments caused enhanced film transparency and electrical conductivity. Electron microscopy images suggested that SWCNTs were embedded in the plastic substrates, forming a thin layer of conductive composite materials. Raman spectroscopy detected a certain level of doping in the SWCNTs after the chemical treatments, which particularly affected metallic nanotubes in the case of the HNO 3 treatment. The microscopic adhesion and hardness of the SWCNT films were studied through a nanoscratch test. Overall, the efficiency of selected chemical postdeposition treatments for improving the SWCNT adhesion and the robustness of the resulting SWCNT films are demonstrated on flexible substrates of different chemical compositions.

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Section: Introductionmentioning

confidence: 99%

Chemical Postdeposition Treatments To Improve the Adhesion of Carbon Nanotube Films on Plastic Substrates

et al. 2019

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“…Several strategies have been applied to improve the physical stability of CNTs or rGO on membranes to form stable ECMs. These strategies have included the use of binding agents (such as poly(vinyl alcohol) (PVA) , and poly(methyl methacrylate)), microwave irradiation, hot pressing transfer, and postdeposition treatment with chemicals such as nitric acid . While some of these methods were successful with some polymeric membranes such as poly(ether sulfone) (PES), , cellulose nitrate, and poly(ethylene terephthalate), no methods have yet been developed to create stable ECMs on chemically inert poly(vinylidene fluoride) (PVDF) membranes. , Furthermore, some additives and cross-linkers, such as PVA, have been demonstrated to leach from the membrane under concentration polarization, leading to unstable CNT cross-linking and variable surface conductivities …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Poly(vinylidene fluoride) (PVDF) Membranes Using Polyethylenimine Cross-Linked Polydopamine-Bound Carbon Nanotubes

Awad,

de Lannoy

2024

ACS Appl. Polym. Mater.

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Electrochemical membranes (ECMs) are an emerging multifunctional separation technology that enables simultaneous contaminant filtration and reaction due to their electrically conductive porous surface coatings. Physical coating stability remains a technical challenge for ECMs, which are largely based on carbonaceous nanomaterials or metallic thin films. In this research, binding chemistry based on polydopamine (PDA) and polyethylenimine (PEI) was developed to prepare physically stable ECMs. Poly(vinylidene fluoride) (PVDF) ultrafiltration membranes were coated with PEI cross-linked PDA followed by the deposition of carboxylfunctionalized single/double-walled carbon nanotubes (SW/DWCNTs-COOH). Fabricated membranes were characterized for their structural, physicochemical, electrochemical, and separation properties. In a batch electrochemical system, the membranes achieved >99.2% electrochemical reduction of methyl orange (MO) in 120 min. Results revealed that the PDA/PEI intermediate layer can significantly enhance the adhesion between the SW/DWCNTs and the underlying polymer membrane without a substantial reduction (<10%) in water permeability. Response surface methodology (RSM) was employed to optimize the permeability and surface electrical conductivity of ECMs by studying the influence of PDA concentration, PEI concentration, and the branched-amine content of PEI in the coating solution. RSM analysis demonstrated two factorial interactions between PDA and PEI concentrations, as well as PEI concentration and PEI branch molecular weight. Our optimization study revealed that the use of a 1:1 ratio of PDA/PEI at low concentrations (∼2 mg/mL) and high PEI branch M w (∼1200) was the ideal preparation condition within the tested design space to maximize both the water permeability (∼895 L/m 2 /h/bar) and electrical conductivity (∼29,761 S/m). This optimized cross-linking chemistry demonstrates the ability to make practical and physically stable ECMs on chemically inert PVDF membranes, expanding the range of membranes that can be used to create electrochemical membranes.

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“…Another interesting solution is the addition of an acrylic binder to water-based CNT dispersions. Moreover, these acrylic inks can be deposited on flexible plastic substrates, for instance by spray-coating [25] or rod-coating [26].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the addition of certain quantities of acrylic resins has been shown to be compatible with the fabrication of conductive CNT films [25,26]. Later on, acrylic inks containing graphene and CNTs have been processed by gravure printing, achieving high electrical conductivity for printed electronics [27].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Film Electrodes with Acrylic Additives: Blocking Electrochemical Charge Transfer Reactions

et al. 2020

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Carbon nanotubes (CNTs) processed into conductive films by liquid phase deposition technologies reveal increasing interest as electrode components in electrochemical device platforms for sensing and energy storage applications. In this work we show that the addition of acrylic latex to water-based CNT inks not only favors the fabrication of stable and robust flexible electrodes on plastic substrates but, moreover, sensitively enables the control of their electrical and electrochemical transport properties. Importantly, within a given concentration range, the acrylic additive in the films, being used as working electrodes, effectively blocks undesired faradaic transfer reactions across the electrode–electrolyte interface while maintaining their capacitance response as probed in a three-electrode electrochemical device configuration. Our results suggest a valuable strategy to enhance the chemical stability of CNT film electrodes and to suppress non-specific parasitic electrochemical reactions of relevance to electroanalytical and energy storage applications.

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Transparent Conductive Thin Film Synthesis Based on Single-Walled Carbon Nanotubes Dispersion Containing Polymethylmethacrylate Binder

Cited by 11 publications

References 7 publications

Chemical Postdeposition Treatments To Improve the Adhesion of Carbon Nanotube Films on Plastic Substrates

Chemical Postdeposition Treatments To Improve the Adhesion of Carbon Nanotube Films on Plastic Substrates

Electrochemical Poly(vinylidene fluoride) (PVDF) Membranes Using Polyethylenimine Cross-Linked Polydopamine-Bound Carbon Nanotubes

Carbon Nanotube Film Electrodes with Acrylic Additives: Blocking Electrochemical Charge Transfer Reactions

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