Liquid transport membrane
a liquid transport membrane and membrane technology, applied in the field of membranes, can solve the problems of overheating or heat loss, and reduce the effectiveness of the effect of the liquid transport membran
Inactive Publication Date: 2014-12-25
OSMOTEX AG
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Benefits of technology
The patent aims to achieve its goals by using a specific object detailed in the text claims.
Problems solved by technology
In general, humidity control represents a challenge in all applications involving water in the form of condensation, perspiration, rain, percolation, process water, and so on.
Many textiles, in particular those suitable for waterproof and protective garments, have however little abilities to transport humidity, and can therefore lead to overheating or heat losses when humidity saturates the fibres of a garment and reduce its thermal insulation.
Such materials rely on passive transport of water and their effectiveness reduces with the increase of the external humidity.
Method used
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[0013]Membranes transporting liquid by aid of an electric field, like electroosmotic or electrokinetic membranes and hereafter referred to as “active membranes” will operate as long as the membrane is wet or humid. For electroosmotic membranes, movable ions have to be hydrated in order to obtain moisture transport, and for membranes with a pore size allowing viscous flow a high transport rate will be obtained when the pores are filled with liquid.
[0014]One or more such active membranes could be included in a device (for example a garment, bed linens, seat covers etc). In use, the need for moisture transport will vary with time. For example, a wearer of a jacket might have a high perspiration rate while walking uphill but a lower on a flat surface. For bed linens, it can be noticed that humans have a higher perspiration rate at certain periods during sleep. Thus, in applications the need for water removal will fluctuate with time. The time fluctuations will further be different at di...
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Abstract
A liquid transport membrane includes a porous layer having conductive electrodes on the opposite surfaces. The electrodes are arranged so as to induce an electric field across the membrane when a driving voltage is applied to the electrodes. The conductive electrodes each include a thin conductive layer which is coated onto the porous layer and an additional layer to improve the distribution of electricity.
Description
FIELD OF THE INVENTION[0001]Embodiments of the present invention relate to membranes exhibiting favourable liquid transport properties, and to several applications of the liquid transport membranes.DESCRIPTION OF RELATED ART[0002]In general, humidity control represents a challenge in all applications involving water in the form of condensation, perspiration, rain, percolation, process water, and so on.[0003]The human body, particularly during physical activity, exudes perspiration that should be carried away from the skin in order to ensure thermal comfort. Many textiles, in particular those suitable for waterproof and protective garments, have however little abilities to transport humidity, and can therefore lead to overheating or heat losses when humidity saturates the fibres of a garment and reduce its thermal insulation.[0004]Modern pieces of clothing make use of so called ‘breathable’ fabrics that allow the passage of water vapour while remaining waterproof. Such materials rely...
Claims
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IPC IPC(8): B01D69/12B01D69/10B01D61/42
CPCB01D69/12B01D2313/00B01D69/10B01D61/427A41D31/02A41D31/12A41D31/125B01D2313/60B01D69/1216B01D2313/903A41D3/00
Inventor HELDAL, TRONDLAUPER, DOMINIQUE
Owner OSMOTEX AG