Effect of Electric Field on Adhesion of Thermoplastic Resin against Steel Plate

Murashima, Motoyuki; Umehara, Noritsugu; Kousaka, Hiroyuki; Deng, Xingqiao

doi:10.2474/trol.12.42

Cited by 16 publications

(4 citation statements)

References 24 publications

(21 reference statements)

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“…About the adhesion on the surface it was reported that high hardness and low surface energy coatings was able to demonstrate low adhesion of ceramics particles [25]. In addition, it was revealed that the surface adhesion and tribological properties could be controlled by texturing and electrical charge [38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Influence of defects in sp2-bonded network of diamond-like carbon on silica scale adhesion in geothermal power plants

Nakashima

Umehara

Kousaka

et al. 2022

Preprint

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Silica scale adhesion onto geothermal power plant equipment reduces the power efficiency. In our previous study, diamond-like carbon (DLC) coatings with low sp2 fractions and high hydrogen contents were found to suppress silica adhesion. Therefore, the present study was aimed at clarifying the mechanism of silica adhesion onto the sp2-bonded network of DLC. In-lens scanning electron microscopic imaging of silica adhered onto defective graphene indicated that the adhesion occurred on defects in the sp2-bonded network. First-principles calculations revealed that the graphene with hydrogen-terminated defects exhibited reduced adsorption energy between silica and the sp2-bonded network. Overall, the simulations and experiments helped establish a silica adhesion model in which defects in the sp2-bonding network of DLC behave as silica adhesion sites

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Section: Introductionmentioning

confidence: 99%

Influence of defects in sp2-bonded network of diamond-like carbon on silica scale adhesion in geothermal power plants

Nakashima

Umehara

Kousaka

et al. 2022

Preprint

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“…Many types of adhesive forces affect the micro-/nanoscale particles. Most of them are developed from surface energy (i.e., van der Waals force and electrostatic interactions), electrostatic force, and meniscus force due to water molecules in the atmosphere. − Although several active-control methods of adhesion and friction have been proposed, − surface treatment is still a reliable method and widely used in industrial fields. The surface treatment methods include surface texturing and coatings for controlling surface energy.…”

Section: Introductionmentioning

confidence: 99%

Nanotextured Mold Surface with DLC Coating for Reduction in Residual Ceramic Particles

et al. 2021

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In the ceramic industry, ceramic particles remain on a mold surface due to which the mold requires frequent cleaning during press molding, reducing productivity. Surface texturing and tetrahedral amorphous carbon (ta-C) coatings are well-known surface-energy controllable treatments developed for low adhesion, low friction, and high wear resistance. In the present paper, we demonstrate the effect of reducing ceramic residues using nanotexturing, ta-C coatings, and their combination. We compare two surface morphologies (i.e., 770 nm pitch nanotexturing and flat) and five materials (i.e., nonhardened steel, hardened steel, ta-C, and two types of nitrogen-doped ta-C (ta-CNx). Molding test results show that the ta-C coating on flat surfaces with the highest hardness of 30 GPa shows the lowest residual amount of 5.9 μg for Al2O3 ceramic particles. The amount is 82% less than that of the nonhardened steel. The ta-CNx20, made with a nitrogen flow rate of 20 sccm, shows the lowest residual amount of 234 μg for SiO2 ceramic particles, which is 81% less than that of the nontextured ta-CNx20. In conclusion, we provide design guidelines for nanotextured mold surfaces including the texturing pitch should be small enough for ceramic particles; the mold surface should be sufficiently hard; the lower the surface energy per unit area, the less residues of ceramic particles.

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“…Therefore, new functional surfaces that actively change tribological characteristics have a potential to become a future engineering technology for adaptability, robustness, multifunctionality, high efficiency, and energy saving. In some trial using electric fields, active control of lubricant properties [27,28] and adhesion [29] was achieved. In addition, Bin Taib et al demonstrated active friction control of DLC coatings using ultraviolet (UV) ray irradiation.…”

Section: Introductionmentioning

confidence: 99%

Realization of a Novel Morphing Surface Using Additive Manufacturing and Its Active Control in Friction

Murashima

Imaizumi

Kawaguchi

et al. 2021

Journal of Tribology

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As the need for higher efficiency of engineering components increases, so does the demand for functional surfaces. While various tribosurfaces (e.g., texturing and coatings) have been developed, many researches are aimed at static functionality. On the other hand, due to a wide range of environmental adaptability and active control, active-morphing surfaces can be highly efficient and robust. In this paper, we demonstrate a novel morphing surface and its realization using additive manufacturing (AM). By using a diaphragm structure, morphing performance is achieved even if a hard resin material is used. When air pressure is applied to the backside of the diaphragm, it changes to a convex shape, and vice versa. The concept requires a complex structure for arranging airflow and a solid morphing system. The AM is one great technique to create such complex structure. As a result of actual manufacturing, the created morphing structure realizes a large morphing of 600 µm or more. In addition, the shape changes reversibly depending on the air pressure. The surface also exhibits very interesting tribological characteristics. The surface shows a friction coefficient of 0.5-1.7 with a convexity, and then decreases to about 0.3 with a concavity. A real-contact area measurement reveals that the novel property occurs due to change in the real-contact area depending on surface morphology. In conclusion, the present paper provides a new concept of a novel morphing tribosurface, which selectively performs as a low-friction or break-like surface, created using AM.

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Effect of Electric Field on Adhesion of Thermoplastic Resin against Steel Plate

Cited by 16 publications

References 24 publications

Influence of defects in sp2-bonded network of diamond-like carbon on silica scale adhesion in geothermal power plants

Influence of defects in sp2-bonded network of diamond-like carbon on silica scale adhesion in geothermal power plants

Nanotextured Mold Surface with DLC Coating for Reduction in Residual Ceramic Particles

Realization of a Novel Morphing Surface Using Additive Manufacturing and Its Active Control in Friction

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