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Nuevo proceso de electrohilado con múltiples conductos

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TOUK20131216007
Publicado:
02/01/2015
Caducidad:
06/03/2015
Resumen:
Un centro de investigación británico ha desarrollado un nuevo proceso de electrohilado que permite la producción paralela de nanofibras multinúcleo muy finas con un diámetro entre 3 y 1000 nm. La principal ventaja frente a los métodos actuales es que los conductos concéntricos permiten la aplicación de capas de fibras con varios líquidos inmiscibles de un espesor variable. Las estructuras producidas pueden emplearse en numerosos sectores. El centro de investigación busca socios con el fin de establecer acuerdos de cooperación técnica y comercial.

Details

Tittle:
Novel Multi Ducted Electro Spinning Nozzle
Summary:
A UK Research organization has developed a novel electro-spinning process that permits the parallel production of very fine multicore nano-fibres and particles of diameter between 3-1000 nm (nano-metres). The main advantage over current electro- spinning methods is that concentric ducts enable the layering of the fibres with various immiscible fluids at varying thickness. The structures thus produced can be used in a wide range fields. The developer offers commercial and technical partnerships.
Description:
The electro-spinning process is a particularly versatile process for the production of nano-fibres. Current technologies deploy one nozzle (usually a hypodermic needle) to draw out the fibre. This development deploys a plurality of ducts arranged for supplying a plurality of fluids that may be used in the formation of the fluid jet. The ducts may have flow cross section with dimensions less than 0.5 millimetres, for example up to hundreds of microns.
The methodology developed by UK researchers deploys a nozzle which includes within it one or more ducts through which fluid flows to form a Taylor cone (a Taylor cone is produced when a small volume of electrically conductive liquid is exposed to an electric field, the shape of liquid starts to deform from the shape caused by surface tension alone. As the voltage is increased the effect of the electric field becomes more prominent and as it approaches exerting a similar amount of force on the droplet as the surface tension does a cone shape begins to form with convex sides and a rounded tip. This approaches the shape of a cone with a whole angle (width) of 98.6°. An electric field is applied between the nozzle and a collector on to which the produced fibres fall. The setup may also be arranged to have multiple nozzles to allow for parallel production of fibres.
The ducts are positioned in a concentric fashion in order to produce fibres having multiple layers of different fluids. This allows production of complex fibres having a core-multishell structure. The nozzle may also be used to form multicore spherical particles. The process has been proved I the laboratory and is now at a stage where a commercial and licensing opportunity can be offered to be included in the manufacture of marketable products.
Advantages and Innovations:
Innovations are:
The nozzle has multiple ducts for supplying fluids that are utilized in formation of a fluid jet, where each duct is passed into aperture.
The aperture of a duct is concentric to another aperture of another duct, where the nozzle is arranged on a substrate.
Walls bound the apertures, where the walls protrude from a surface of the substrate. The ducts extend through to another surface of the substrate.
With advantages over currrent methodology:
The nozzle utilizes a fluid sheath, thus preventing rapid evaporation of volatile solvent until fluid is moved away from the nozzle, and hence preventing blockages occurring in the nozzle.
The nozzle can utilize hydrophobic coatings, thus preventing outer parts of the nozzle from wetting and causing unstable Taylor cone formation.
The nozzles are manufactured from silicon on a silicon substrate, so that the nozzles can be packed as arrays in convenient manner.
Stage of Development:
Available for demonstration
IPs:
Patent(s) applied for but not yet granted
CommeR Statunts Regarding IPR Status:
European patents applied for via PCT scheme.

Partner sought

Type and Role of Partner Sought:
The ideal partner would be already engaged in the advanced polymers market, either as a supplier or manufacturer of equipment.
The role of partner would be to identify the route to market and approiate applicatioions for the technology.

Client

Type and Size of Client:
R&D Institution
Already Engaged in Trans-National Cooperation:
No
Languages Spoken:
English

Keywords

Technology Keywords:
03004005 Fibras artificiales
02007005 Materiales compuestos
05005 Micro y nanotecnología
02007014 Plásticos, polímeros
02007009 Tecnología de manipulación de materiales (sólidos, fluidos, gases)