Abstract:
The present invention relates to a process for producing polymer fibres, especially nano- and mesofibres, by the electrospinning process, in which a colloidal dispersion of at least one essentially water-insoluble polymer and of at least one nonionic surfactant, if appropriate further comprising at least one water-soluble polymer, is electrospun in an aqueous medium. The present invention further relates to fibres obtainable by this process.
Abstract:
Procedimiento para la fabricación de nanoalambres mediante el tratamiento de una fibra que contiene, al menos, un material de soporte y al menos un material termoeléctricamente activo o un compuesto precursor de un material termoeléctricamente activo, que comprende: donde (A) proporcionar una fusión o una solución que contenga, al menos, un material de soporte o un compuesto precursor apropiado del material de soporte y, al menos, un material termoeléctricamente activo o un compuesto precursor de un material termoeléctricamente activo, (B) electrohilatura de la fusión o de la solución, del paso (A) para obtener una fibra que contiene, al menos, un material de soporte y, al menos, un material termoeléctricamente activo o un compuesto precursor de un material termoeléctricamente activo, (C) en caso necesario, revestimiento de la fibra obtenida con un aislante eléctrico, para obtener una fibra eléctricamente aislada. (D) en caso necesario, transformación del compuesto precursor del material termoeléctricamente activo a forma activa. (E) en caso necesario, eliminación del material de soporte, con lo cual se pueden ejecutar los pasos (C) hasta (E) en un orden arbitrario, para lo cual el material termoelétricamente activo es, al menos, un compuesto que contiene al menos un elemento, seleccionado del grupo compuesto por telurio y boro, o el material termoeléctricamente activo es seleccionado del grupo compuesto por antimoniuros, siliciuros, germaniuros, escuteruditas, clatratos, bismuto, NaCO 2O 4, Bi 2-xPh xSr 2Co 2O y donde x = 0 hasta 0,6 y y = 8 + sigma; triquita con base de Cu-Co-O ó Bi-Sr-Co-O, óxidos mixtos de la fórmula (I) ** ver fórmula 0
Abstract:
THE PRESENT INVENTION RELATES TO METHODS FOR MANUFACTURING NANOWIRES AND NANOTUBES BY TREATMENT OF A FIBRE COMPRISING AT LEAST ONE CARRIER MATERIAL AND AT LEAST ONE THERMOELECTRICALLY ACTIVE MATERIAL OR A PRECURSOR COMPOUND OF A THERMOELECTRICALLY ACTIVE MATERIAL; TO A NANOWIRE, COMPRISING AT LEAST ONE THERMOELECTRICALLY ACTIVE MATERIAL, HAVING A DIAMETER OF ?200 NM AND A LENGTH OF ?1 MM; TO NANOTUBES, COMPRISING AT LEAST ONE THERMOELECTRICALLY ACTIVE MATERIAL, HAVING A DIAMETER OF ?200 NM, A WALL THICKNESS OF ?30 NM AND A LENGTH OF ?1 MM; AND TO THE USE OF THE NANOWIRES OR NANOTUBES FOR THERMOELECTRIC TEMPERATURE TREATMENT, FOR ELECTRICITY GENERATION, IN SENSORS OR FOR TEMPERATURE CONTROL.
Abstract:
The method involves providing a melted mass or solution, which contains a carrier material or suitable precursor compounds of the carrier material and thermo electric active materials or precursor compounds of the thermo electric active materials. The melted mass or solution is electrically spun, and a fiber containing the precursor compounds of the thermo electric active materials is received. The fiber is enclosed with an electrical insulator, and the precursor compounds of the thermo electric active materials are converted into an active form.
Abstract:
The method involves providing a melted mass or solution, which contains a carrier material or suitable precursor compounds of the carrier material and thermo electric active materials or precursor compounds of the thermo electric active materials. The melted mass or solution is electrically spun, and a fiber containing the precursor compounds of the thermo electric active materials is received. The fiber is enclosed with an electrical insulator, and the precursor compounds of the thermo electric active materials are converted into an active form.