Quantitative evaluation for the ASTM D4541-17/D7234 and ASTM D3359 adhesion norms with digital optical microscopy for surface modifications with flame and APPJ

López, Coraquetzali Magdaleno; Bueno, José de Jesús Pérez

doi:10.1016/j.ijadhadh.2020.102551

Cited by 17 publications

(7 citation statements)

References 28 publications

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“…Thus, these printed samples exhibited excellent adhesion to the substrate following laser sintering, indicating a rating of 5b according to the commonly used ASTM D3359 tape test (Figure 1f). [ 43 ] At an input power of 300 mW, we observed minor discontinuities in the nanoparticle film (white arrows, Figure 1g). These pinhole discontinuities are commonly observed for thin printed features patterned using solution processing, likely forming during dewetting due to drastic differences between the surface energy of the substrate and solution.…”

Section: Resultsmentioning

confidence: 99%

Electroplating of Aerosol Jet‐Printed Silver Inks

et al. 2021

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Aerosol jet printing of silver inks is a promising approach for 3D printing of electronics, particularly for obtaining very complex circuits with high‐resolution conductive pads and traces. Common silver inks are however not competitive with traditional bulk metal conductors, requiring sintering at high temperatures as well as having significant porosity that can result in early failure. Herein, the possibility of using electroplating to deposit bulk metal copper on aerosol jetted inks is investigated, and more than an order of magnitude reduction in electrical resistivity is shown. The plating rate, resistivity, and adhesion are characterized, along with the morphology of the resulting deposits. This approach is then shown to allow high‐strength soldering to the electroplated metal traces, demonstrating the capability of this technology for integration of soldered surface mount components with aerosol jet‐printed electronics.

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Section: Resultsmentioning

confidence: 99%

Electroplating of Aerosol Jet‐Printed Silver Inks

et al. 2021

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“…60 Moreover, improvements in adhesion has been shown to increase PSC stability. 61 To probe the differences of adhesion of NG-treated films, an adhesive tape test, which is widely used to assess the performance of coatings 62,63 was applied to our perovskite films. This test gives a semiquantitative measure of the adhesion of organic coatings to substrates 50 and is depicted in Figure 10A.…”

Section: Resultsmentioning

confidence: 99%

Improving the Efficiency, Stability, and Adhesion of Perovskite Solar Cells Using Nanogel Additive Engineering

Altujjar

Mokhtar

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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Additive engineering has been applied widely to improve the efficiency and/or stability of perovskite solar cells (PSCs). Most additives used to date are difficult to locate within PSCs as they are small molecules or linear polymers. In this work, we introduce, for the first time, carboxylic acid-functionalized nanogels (NGs) as additives for PSCs. NGs are swellable sub-100 nm gel particles. The NGs consist of poly(2-(2-methoxyethoxy) ethyl methacrylate)-co-methacrylic acid-co-ethylenegylcol dimethacrylate (PMEO 2 MA-MAA-EGD) particles prepared by a scalable synthesis, which have a diameter of 40 nm. They are visualized in the perovskite films using SEM and are located at the grain boundaries. X-ray photoelectron and FTIR spectroscopy reveal that the NGs coordinate with Pb 2+ via the −COOH groups. Including the NGs within the PSCs increased the grain size, decreased nonradiative recombination, and increased the power conversion efficiency (PCE) to 20.20%. The NGs also greatly increase perovskite stability to ambient storage, elevated temperature, and humidity. The best system maintained more than 80% of its original PCE after 180 days of storage under ambient conditions. Tensile cross-cut tape adhesion tests are used to assess perovskite film mechanical integrity. The NGs increased both the adhesion of the perovskite to the substrate and the mechanical stability. This study demonstrates that NGs are an attractive alternative to molecularly dispersed additives for providing performance benefits to PSCs. Our study indicates that the NGs act as a passivator, stabilizer, cross-linker, and adhesion promoter.

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“…Therefore, it is important to indicate whether the composite coatings have suitable adhesion with its metallic substrate or not. An adhesion test was carried out according to the ASTM D3359 standard test method for measuring adhesion by a tape test. , This technique can reveal much more about the true adhesion behaviors of a coating system. The obtained results of the adhesion test reveal that all coating layers adhere well with the alloy substrate without any peeling off as shown in Figure with a rating of 5 A.…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Microwave-Assisted Fabrication of Nanohydroxyapatite Powder and Optimization of Its Nanocomposite Coatings on Magnesium Alloy for Orthopedic Applications

et al. 2021

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Developing appropriate protecting coatings for Mg alloy applications is a challenging issue. Herein, nanohydroxyapatite (nanoHAP) powder was first fabricated by the simple hydrothermal microwave-assisted method. A direct current electrophoresis deposition (EPD) of nanoHAP composite coatings on Mg–3Zn–0.8Ca magnesium alloy was successfully executed. Three suspensions with HAP-dispersive resin solution (ETELAC) ratios (in wt %) of 5–5, 5–2.5, and 2.5–2.5 were chosen for optimizing the effect of applied voltage, deposition time, and stirring mode and rates on the EPD process. NanoHAP composite coatings were applied on each sample in single- and double-run depositions. The results revealed that the maximum weight gain on the coated samples was obtained in 5–5 suspension at 50 V under 150 rpm mechanical stirring rate. Surface examination indicated crack-free coating formation with varying grain sizes. Adhesion tests demonstrated high interconnection between the obtained nanocomposite coatings and the alloy substrate. Electrochemical evaluation measurements in SBF at 37 °C indicated that the corrosion resistance of any coated sample is always superior compared to that of the uncoated bare substrate. It was suggested that the EPD of nanoHAP/ETELAC composite coatings on Mg–Zn–Ca alloy can be a good solution for protecting the alloy from the attack of the aggressive ions bound in the SBF environment.

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Quantitative evaluation for the ASTM D4541-17/D7234 and ASTM D3359 adhesion norms with digital optical microscopy for surface modifications with flame and APPJ

Cited by 17 publications

References 28 publications

Electroplating of Aerosol Jet‐Printed Silver Inks

Electroplating of Aerosol Jet‐Printed Silver Inks

Improving the Efficiency, Stability, and Adhesion of Perovskite Solar Cells Using Nanogel Additive Engineering

Hydrothermal Microwave-Assisted Fabrication of Nanohydroxyapatite Powder and Optimization of Its Nanocomposite Coatings on Magnesium Alloy for Orthopedic Applications

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