Solvent-free electrically conductive Ag/ethylene vinyl acetate (EVA) composites for paper-based printable electronics

Shen, Yuqiu; Chen, Zhenxing; Zhou, Yong; Lei, Zuomin; Liu, Yi; Feng, Wenchao; Zhang, Zhuo; Chen, Houfu

doi:10.1039/c9ra02593f

Cited by 8 publications

(9 citation statements)

References 52 publications

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“…For pure EVA, there are five distinct groups of vibrations in the micro-Raman spectrum [ 86 ]. The vibrations in the range 500–700 cm −1 correspond to the deformation movements of the acetate groups of the EVA monomers [ 86 , 87 , 88 ]. A set of peaks related to the C-C stretches of the constituent monomers is observed in the range of 750 to 1250 cm −1 [ 86 , 89 ].…”

Section: Resultsmentioning

confidence: 99%

“…A set of peaks related to the C-C stretches of the constituent monomers is observed in the range of 750 to 1250 cm −1 [ 86 , 89 ]. The peaks between 1300 and 1500 cm −1 were ascribed to the bending and twisting vibrations of the ethylene groups in the monomers of EVA [ 86 , 87 ]. Between 1700 and 1900 cm −1 , stretches related to C=O bonds are observed [ 86 , 90 ].…”

Section: Resultsmentioning

confidence: 99%

“…Between 1700 and 1900 cm −1 , stretches related to C=O bonds are observed [ 86 , 90 ]. At the highest wavelengths, located between 2800 and 3050 cm −1 , C–H aliphatic stretches of the EVA are observed [ 87 , 91 ]. In contrast to the XRD observations, the composite does not lose its organization at short range; that is, its constituent monomers maintain their degree of structural order.…”

Section: Resultsmentioning

confidence: 99%

“…The SiO 2 -Ag mode in the composite can also be observed, indicating good incorporation in the EVA polymer. According to Shen et al, this mode at ~240 cm −1 may also refer to vibrations of the Ag-O bonds, which can be formed from the interaction of the O atoms of the carbonyl groups of the EVA with the Ag contained in SiO 2 -Ag [ 87 ].…”

Section: Resultsmentioning

confidence: 99%

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SiO2-Ag Composite as a Highly Virucidal Material: A Roadmap that Rapidly Eliminates SARS-CoV-2

et al. 2021

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COVID-19, as the cause of a global pandemic, has resulted in lockdowns all over the world since early 2020. Both theoretical and experimental efforts are being made to find an effective treatment to suppress the virus, constituting the forefront of current global safety concerns and a significant burden on global economies. The development of innovative materials able to prevent the transmission, spread, and entry of COVID-19 pathogens into the human body is currently in the spotlight. The synthesis of these materials is, therefore, gaining momentum, as methods providing nontoxic and environmentally friendly procedures are in high demand. Here, a highly virucidal material constructed from SiO2-Ag composite immobilized in a polymeric matrix (ethyl vinyl acetate) is presented. The experimental results indicated that the as-fabricated samples exhibited high antibacterial activity towards Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) as well as towards SARS-CoV-2. Based on the present results and radical scavenger experiments, we propose a possible mechanism to explain the enhancement of the biocidal activity. In the presence of O2 and H2O, the plasmon-assisted surface mechanism is the major reaction channel generating reactive oxygen species (ROS). We believe that the present strategy based on the plasmonic effect would be a significant contribution to the design and preparation of efficient biocidal materials. This fundamental research is a precedent for the design and application of adequate technology to the next-generation of antiviral surfaces to combat SARS-CoV-2.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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SiO2-Ag Composite as a Highly Virucidal Material: A Roadmap that Rapidly Eliminates SARS-CoV-2

et al. 2021

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“…Previously, EVA has been applied in flexible electrical devices, such as spray-coated conductive films for solar cell electrodes [32], spin-coated transparent electrodes [33], screen-printed conductors for paper-based electronics [34], and a dip-coated conductive membrane for energy storage [35]. This environmentally friendly copolymer is also widely used in food packaging, as an encapsulation material for flexible photovoltaic devices [36], as a hot-melt adhesive [37], and as a flexible adhesive layer between textile insole pads [38].…”

Section: Justification Of the Binder Materials Selectionmentioning

confidence: 99%

Development of a Screen-Printable Carbon Paste to Achieve Washable Conductive Textiles

et al. 2021

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Conductive tracks are key constituents of wearable electronics and e-textiles, as they form the interconnective links between wearable electrical devices/systems. They are made by coating or printing conductive patterns or tracks on textiles or by weaving, knitting, or embroidering conductive yarns into textiles. Screen printing is a mature and cost-effective fabrication method that is used in the textile industry. It allows a high degree of geometric freedom for the design of conductive patterns or tracks. Current screen-printed conductive textiles have the limitations of low durability when washed or when placed under bending, and they typically require encapsulation layers to protect the printed conductor. This paper presents a printable paste formulation and fabrication process based on screen printing for achieving a flexible and durable conductive polyester–cotton textile using an inexpensive carbon as the conductor. The process does not require an interface, the smoothing of the textile, or an encapsulation layer to protect the conductor on the textile. A resistivity of 4 × 10−2 Ω·m was achieved. The textile remains conductive after 20 standard washes, resulting in the conductor’s resistance increasing by 140%. The conductive textile demonstrated less than ±10% resistance variation after bending for 2000 cycles.

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A New Class of Electronic Devices Based on Flexible Porous Substrates

Zhang

Huang

et al. 2022

Advanced Science

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With the advent of the Internet of Things era, the connection between electronic devices and humans is getting closer and closer. New‐concept electronic devices including e‐skins, nanogenerators, brain–machine interfaces, and implantable medical devices, can work on or inside human bodies, calling for wearing comfort, super flexibility, biodegradability, and stability under complex deformations. However, conventional electronics based on metal and plastic substrates cannot effectively meet these new application requirements. Therefore, a series of advanced electronic devices based on flexible porous substrates (e.g., paper, fabric, electrospun nanofibers, wood, and elastic polymer sponge) is being developed to address these challenges by virtue of their superior biocompatibility, breathability, deformability, and robustness. The porous structure of these substrates can not only improve device performance but also enable new functions, but due to their wide variety, choosing the right porous substrate is crucial for preparing high‐performance electronics for specific applications. Herein, the properties of different flexible porous substrates are summarized and their basic principles of design, manufacture, and use are highlighted. Subsequently, various functionalization methods of these porous substrates are briefly introduced and compared. Then, the latest advances in flexible porous substrate‐based electronics are demonstrated. Finally, the remaining challenges and future directions are discussed.

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Solvent-free electrically conductive Ag/ethylene vinyl acetate (EVA) composites for paper-based printable electronics

Abstract: A novel type of solvent-free electrically conductive Ag/EVA composite for paper-based printable electronics was prepared through a thermal melting method.

Cited by 8 publications

References 52 publications

SiO2-Ag Composite as a Highly Virucidal Material: A Roadmap that Rapidly Eliminates SARS-CoV-2

SiO2-Ag Composite as a Highly Virucidal Material: A Roadmap that Rapidly Eliminates SARS-CoV-2

Development of a Screen-Printable Carbon Paste to Achieve Washable Conductive Textiles

A New Class of Electronic Devices Based on Flexible Porous Substrates

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