Adhesion work analysis through molecular modeling and wetting angle measurement

Król, Dawid Jan; Wymysłowski, Artur; Allaf, Kamil Nouri

doi:10.1016/j.microrel.2015.02.006

Cited by 13 publications

(2 citation statements)

References 13 publications

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“…The surface roughness of an aluminum plate is an important factor for the stable loading of TiO 2 powder. The surface contact angle and free energy were detected to clarify the effect of treatment methods on the surface roughness [28,29]. Deionized water was used as the titrate to measure the surface contact angle and free energy of aluminum plates treated by acid etching and anodizing etching.…”

Section: Analysis Of Tio 2 Loading Mechanism 241 Analysis Of Substrat...mentioning

confidence: 99%

Stable Loading of TiO2 Catalysts on the Surface of Metal Substrate for Enhanced Photocatalytic Toluene Oxidation

Xu,

Chen,

Zhao

et al. 2023

Molecules

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To promote the practical application of TiO2 in photocatalytic toluene oxidation, the honeycomb aluminum plates were selected as the metal substrate for the loading of TiO2 powder. Surface-etching treatment was performed and titanium tetrachloride was selected as the binder to strengthen the loading stability. The loading stability and photocatalytic activity of the monolithic catalyst were further investigated, and the optimal surface treatment scheme (acid etching with 15.0 wt.% HNO3 solution for 15 min impregnation) was proposed. Therein, the optimal monolithic catalyst could achieve the loading efficiency of 42.4% and toluene degradation efficiencies of 76.2%. The mechanism for the stable loading of TiO2 was revealed by experiment and DFT calculation. The high surface roughness of metal substrate and the strong chemisorption between TiO2 and TiCl4 accounted for the high loading efficiency and photocatalytic activity. This work provides the pioneering exploration for the practical application of TiO2 catalysts loaded on the surface of metal substrate for VOCs removal, which is of significance for the large-scaled application of photocatalytic technology.

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Section: Analysis Of Tio 2 Loading Mechanism 241 Analysis Of Substrat...mentioning

confidence: 99%

Stable Loading of TiO2 Catalysts on the Surface of Metal Substrate for Enhanced Photocatalytic Toluene Oxidation

Xu,

Chen,

Zhao

et al. 2023

Molecules

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“…where F n1 is the apparent Hertzian load which would cause the same contact area, W 12 is the work of adhesion [26].…”

Section: Normal Loading Conditionmentioning

confidence: 99%

The Static Frictional Behaviors of Rubber for Pipe-Laying Operation

et al. 2017

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Featured Application: This research aims to reveal the static frictional behavior of rubber pipe contact systems during a pipe-laying operation. The testing results of friction facilitate the selection of appropriate contact pairs for tribological optimal design of the tensioner. The discussion about the instability of static friction is helping us to avoid pipe slipping accidents and to maintain accuracy of pipeline installations.Abstract: Experimental research is carried out to reveal the static frictional behaviors of rubber pipe contact systems. This research is motivated by deep water pipe-laying operations where rubber blocks are used to clamp the pipe to supply sufficient static friction. Within this context, a friction testing instrument has been designed to mimic a situation of the beginning of the pipe-laying installation. Using this instrument, the maximum static friction forces (F) of a rubber pipe contact system are tested. The results show that the ultimate values of the static frictions fluctuate due to the increasing rate of the tangential load (F T ). The evolution of contact between rubber and polymethyl methacrylate (PMMA) pipe is observed to identify the formation and propagation of the folds within the apparent contact area. In addition, it is confirmed that the evolution of contact is influenced by the folds and creep of the rubber surface. The creep deformation takes primary effect in accelerating the separation of the interfaces of contact during relative high normal loads (20, 30, 40 N) and low increasing rate of F T ; whereas for all of the testing normal loads (10-40 N), the propagation of the folds release the energy which is stored in the interface of rubber when the increasing rate of F T is high. Therefore, the fluctuation of the maximum static friction of the contact system can be regarded as a consequence of interaction of the creep and folds. Furthermore, the instability of the coefficient of static friction in this test has been examined, and it indicated that the creep and folds could affect the static friction distinctly within a certain range of a normal load. This research is beneficial for arranging appropriate normal loads and laying speeds to avoid pipes slipping during a pipe-laying operation.

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Comparison of the adhesion forces in single and double‐layer coatings on the MEMS surfaces by JKR and DMT models

Joulaei

Kolahdoozan

Salehi

et al. 2019

Surface & Interface Analysis

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In many medical and industrial applications, some strategies are needed to control the adhesion forces between the materials, because surface forces can activate or hinder the function of the device. All actual surfaces present some levels of roughness and the contact between two surfaces is transferred by the asperities on the surfaces.The force of the adhesion, which depends on the operating situations, can be influenced by the contact region. The aim of the present study is to predict the adhesion force in MEMS surfaces using the JKR and DMT models. The surfaces of the coating material in this research consisted of the single-layer coating of Gold and Silver, and the double-layer coating of TiO 2 /Gold and TiO 2 /Silver on the silicon (100) substrates.The depositing was done by the thermal evaporation method. The results showed that the double-layer coating developed by the new deposition method helped the reduction of the adhesion forces between the probe tip and the specimen surface.The predicted adhesion forces between the probe and the specimens with DMT and JKR models were compared with the experimental results. For all specimens, the simulated data by applying the JKR theory were in a good agreement with the adhesion force experimental values.

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Adhesion work analysis through molecular modeling and wetting angle measurement

Cited by 13 publications

References 13 publications

Stable Loading of TiO2 Catalysts on the Surface of Metal Substrate for Enhanced Photocatalytic Toluene Oxidation

Stable Loading of TiO2 Catalysts on the Surface of Metal Substrate for Enhanced Photocatalytic Toluene Oxidation

The Static Frictional Behaviors of Rubber for Pipe-Laying Operation

Comparison of the adhesion forces in single and double‐layer coatings on the MEMS surfaces by JKR and DMT models

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