Structure and properties of electrospray printed polymeric films

Pawliczak, Emma E.; Kingsley, Bryce J.; Chiarot, Paul R.

doi:10.1557/s43580-022-00340-0

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…Under the applied potential and effect of numerous parameters, these modes can be exploited to achieve three different patterns: dots, lines, and thin films . The most attractive advantages of ESD to this work include being an extremely conformable technique, meaning that it can deposit highly uniform thin films on diverse shapes of substrates (wires and flat surfaces, for example) and that it demands a very low amount of material, which is advantageous especially when working with expensive materials . ESD is a deposition technique that creates a spray-type deposition without the need for a pressured gas based on the principle of electromagnetic attraction.…”

Section: Resultsmentioning

confidence: 99%

“… 45 The most attractive advantages of ESD to this work include being an extremely conformable technique, meaning that it can deposit highly uniform thin films on diverse shapes of substrates (wires and flat surfaces, for example) and that it demands a very low amount of material, which is advantageous especially when working with expensive materials. 46 ESD is a deposition technique that creates a spray-type deposition without the need for a pressured gas based on the principle of electromagnetic attraction. Due to a high applied potential, the jet disintegrates into charge monodispersed droplets, which go through a process of solvent evaporation.…”

Section: Resultsmentioning

confidence: 99%

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Electrospray Deposition of PEDOT:PSS on Carbon Yarn Electrodes for Solid-State Flexible Supercapacitors

Moniz

Rafique

Carmo

et al. 2023

ACS Appl. Mater. Interfaces

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The increasing demand for flexible electronic devices has risen due to the high interest in electronic textiles (e-textiles). Consequently, the urge to power e-textiles has sparked enormous interest in flexible energy storage devices. One-dimensional (1D) configuration supercapacitors are the most promising technology for textile applications, but often their production involves complex synthesis techniques and expensive materials. This work unveils the use of the novel electrospray deposition (ESD) technique for the deposition of poly(3,4-ethylenedioxythiophene)–poly(styrene sulfonate) (PEDOT:PSS). This deposition methodology on conductive carbon yarns creates flexible electrodes with a high surface area. The deposition conditions of PEDOT:PSS were optimized, and their influence on the electrochemical performance of a 1D symmetric supercapacitor with a cellulose-based gel as an electrolyte and a separator was evaluated. The tests herein reported show that these capacitors exhibited a high specific capacitance of 72 mF g–1, an excellent cyclability of more than 85% capacitance retention after 1500 cycles, and an outstanding capability of bending.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Electrospray Deposition of PEDOT:PSS on Carbon Yarn Electrodes for Solid-State Flexible Supercapacitors

Moniz

Rafique

Carmo

et al. 2023

ACS Appl. Mater. Interfaces

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“…PEEK samples appear in Figure 1 in the electrospraying system attached to the metal collector while the solved EGCG mixture is in the syringe with its nozzle attached clip which is connected to the positive charge of a high power supply. This design was made according to multiple previous papers and articles [24][25][26][27] (iv) Group 4: piranha solution treatment and EGCG coating group (PE). PEEK samples in this group underwent both piranha solution treatment and EGCG coating.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of High-Performance Polyether Ether Ketone Polymer Treated with Piranha Solution and Epigallocatechin-3-Gallate Coating

Alsmael,

Al-Khafaji

2024

BioMed Research International

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Background. Dental implantation has become a standard procedure with high success rates, relying on achieving osseointegration between the implant surface and surrounding bone tissue. Polyether ether ketone (PEEK) is a promising alternative to traditional dental implant materials like titanium, but its osseointegration capabilities are limited due to its hydrophobic nature and reduced surface roughness. Objective. The aim of the study is to increase the surface roughness and hydrophilicity of PEEK by treating the surface with piranha solution and then coating the surface with epigallocatechin-3-gallate (EGCG) by electrospraying technique. Materials and Methods. The study includes four groups intended to investigate the effect of piranha treatment and EGCG coating: a control group of PEEK discs with no treatment (C), PEEK samples treated with piranha solution (P), a group of PEEK samples coated with EGCG (E), and a group of PEEK samples treated with piranha solution and coated with EGCG (PE). Surface roughness, wettability, and microhardness were assessed through statistical analysis. Results. Piranha treatment increased surface roughness, while EGCG coating moderated it, resulting in an intermediate roughness in the PE group. EGCG significantly improved wettability, as indicated by the reduced contact angle. Microhardness increased by about 20% in EGCG-coated groups compared to noncoated groups. Statistical analysis confirmed significant differences between groups in all tests. Conclusion. This study demonstrates the potential of EGCG coating to enhance the surface properties of PEEK as dental implants. The combined piranha and EGCG modification approach shows promise for improved osseointegration, although further vivo research is necessary. Surface modification techniques hold the key to optimizing biomaterial performance, bridging the gap between laboratory findings and clinical implementation in dental implantology.

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“…The processing parameters (flow rate, separation distance, etc.) control the resulting film microstructure, permitting the formation of highlycontrolled films with tunable functional characteristics [9]- [15]. Additionally, electrospray is an electrophoretic process with non-line-of-sight targeting to areas not directly exposed to the emitter [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

Conformal Silver Films for EMI Shielding of SiP Architectures

Pawliczak,

Chiarot

2024

IMAPSource Proceedings

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Electrospray printing is an additive manufacturing technique where a precursor solution composed of a solute material in a compatible solvent is subjected to a high electric potential, generating a spray of charged, solvent-encapsulated particles. Due to the high surface area to volume ratio, the solvent rapidly evaporates to deposit dry or semi-dry solute material onto a target surface. Over time, a thin continuous film is formed. Material emitted by electrospray is highly charged and will follow the electric field lines established between the emitter and a grounded target. As a result, this process is best suited for deploying material onto (grounded) conductive surfaces and can be used to create conformal coatings, even on non-line-of-sight surfaces. In contrast, delivering material to insulating surfaces is more difficult due to the accumulation of charge on the target, inhibiting the deposition of the solute and preventing the formation of a continuous film. We report on a new approach to improve deposition on dielectric (insulating) targets by manipulating the electric field and distribution of charge in the vicinity of the target surface. Colloidal silver in triethylene glycol monomethyl ether is deployed to create a conformal coating on packages consisting of a (i) broadband radiator encapsulated in epoxy molding compound and (ii) a model silicon flip-chip assembly. We seek to replace board level shielding and provide electromagnetic interference protection for System-in-Package at frequencies from 100 MHz to 6 GHz, with a target of 60 dB of isolation at 1 GHz.

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Structure and properties of electrospray printed polymeric films

Cited by 8 publications

References 29 publications

Electrospray Deposition of PEDOT:PSS on Carbon Yarn Electrodes for Solid-State Flexible Supercapacitors

Electrospray Deposition of PEDOT:PSS on Carbon Yarn Electrodes for Solid-State Flexible Supercapacitors

Evaluation of High-Performance Polyether Ether Ketone Polymer Treated with Piranha Solution and Epigallocatechin-3-Gallate Coating

Conformal Silver Films for EMI Shielding of SiP Architectures

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