Publications by authors named "Hongfei Shang"
The application of superamphiphobic coatings improves the surface's ability to repel fluids, thereby greatly enhancing its various functions, including anti-fouling, anti-corrosion, anti-icing, anti-bacterial, and self-cleaning properties. This maximizes the material's potential for industrial applications. This work utilized the agglomeration phenomenon exhibited by nano-spherical titanium dioxide (TiO) particles to fabricate 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) modified TiO (TiO@fluoroPOS) fillers with low surface energy.
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- To enhance the wear resistance of 17-4PH stainless steel used in components like gears, TiC (titanium carbide) is integrated into the material at varying concentrations (0-15 wt%) via 3D printing for the first time.
- The study reveals that increasing TiC content refines grain size and maintains high density, with optimal hardness and wear resistance achieved at 10 wt% TiC, reaching a maximum hardness of 434 HV and a substantial reduction in wear rate.
- Performance improvements are attributed to mechanisms like fine grain strengthening and solid solution strengthening, while excessive TiC (like 15 wt%) may lead to microcracks and reduced effectiveness in wear resistance.
The contact between the blood and the surface of medical materials causes a series of rejection reactions. In this process, the plasma protein is adsorbed to the surface of materials within seconds and binds to glycoprotein receptors on platelets, causing platelet activation, coagulation cascade, and complement activation to form thrombus, which greatly limits the application of medical materials. In our work, the surface of poly(4-methyl-1-pentene) hollow fiber membranes (PMP HFMs) was coated with a diamond-like carbon (DLC) film by the ion plating method.
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- - Plunger pumps are essential in oil pumping but face performance issues due to increasing water content in well fluids, leading to poor lubrication between the plunger and barrel.
- - Standard materials used are stainless steel with a nickel coating, but these surfaces experience eccentric wear and friction problems.
- - A new solution involves laser surface texturing to create dimples on the plunger, which has shown to reduce friction and enhance wear resistance during tests with both oil and water lubrication.
The oxidation mechanism of ultra-high-molecular-weight polyethylene (UHMWPE) and polyoxymethylene (POM) in hydrogen peroxide solution was investigated by molecular dynamics (MD) simulations via reactive force field (ReaxFF) method. MD results from ReaxFF suggested that UHMWPE provided better antioxidation activity at high temperature (>373 K) than its POM counterpart in the same concentration of hydrogen peroxide solution. Furthermore, POM was relatively more susceptible to erosion and swelling because of the infiltration of H2O2 solution.
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