Video Experimental Relacionado
Updated: Apr 16, 2026
08:02
Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
Published on: February 11, 2020
9.5K
Los materiales repelentes. materiales repelentes. Superficies robustas autolimpiantes que funcionan cuando se exponen
Yao Lu1, Sanjayan Sathasivam1, Jinlong Song2
1Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
Science (New York, N.Y.)
|March 7, 2015
Resumen
Los investigadores desarrollaron una pintura autolimpiante duradera y resistente al aceite utilizando nanopartículas de dióxido de titanio. Este innovador recubrimiento mantiene la repelencia al agua en varios materiales después de una abrasión extensa, ofreciendo soluciones versátiles de autolimpieza.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- Química de las superficies.
Sus antecedentes:
- Las superficies superhidrofóbicas ofrecen propiedades de autolimpieza basadas en micro/nanomorfologías.
- Las superficies superhidrofóbicas existentes a menudo carecen de durabilidad mecánica y fallan cuando se exponen al petróleo.
Objetivo del estudio:
- Desarrollar un revestimiento superficial de autolimpieza resistente al aceite y resistente al aceite.
- Para crear un recubrimiento versátil aplicable a diversos materiales duros y blandos.
Principales métodos:
- Fabricación de una suspensión pintable utilizando nanopartículas de dióxido de titanio recubiertas de perfluorosilano en etanol.
- Aplicación del recubrimiento mediante pulverización, inmersión o extrusión en varios sustratos.
- Mejora de la adhesión y robustez del recubrimiento utilizando adhesivos comerciales.
Principales resultados:
- El recubrimiento desarrollado forma una superficie autolimpiante funcional incluso durante la inmersión en aceite.
- Las superficies demostraron una excelente durabilidad, manteniendo la repelencia al agua después de un esfuerzo mecánico significativo (borrar con el dedo, rayar con el cuchillo, 40 ciclos de abrasión).
- El recubrimiento se adhirió bien a diversos materiales, incluida la ropa, el papel, el vidrio y el acero.
Conclusiones:
- La pintura de nanopartículas de dióxido de titanio recubiertas de perfluorosilano proporciona una solución de autolimpieza mecánicamente robusta y resistente al aceite.
- La versatilidad de la formulación permite una amplia aplicación en diversos productos de consumo e industriales.
- Esta tecnología aborda las limitaciones clave de las superficies autolimpiantes actuales, permitiendo nuevas aplicaciones.
Videos de Conceptos Relacionados
01:18Surface Membrane Barriers
3.6K
The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
3.6K
01:26Microbial Bioremediation of Hydrocarbons
101
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to...
101
01:22Waterproofing and Anti-Bacterial Admixtures in Concrete
304
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
304
01:20Radical Autoxidation
3.5K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
3.5K
01:23Hand hygiene
6.7K
Asepsis is the practice of preventing or breaking the chain of infection. The nurse employs aseptic techniques to prevent the spread of microorganisms and reduce the risk of diseases. Hand hygiene is the cornerstone of aseptic techniques and is classified into medical and surgical asepsis. Medical asepsis includes hand hygiene and the use of gloves. Surgical asepsis, or the sterile technique, refers to practices that render and keep objects and areas free of microorganisms.
Hand washing...
Hand washing...
6.7K
01:24Microbial Corrosion
69
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
69