Method and device for producing inorganic aerogel fibers
AssigneeRheinisch-Westfälische Technische Hochschule (RWTH) Aachen
InventorsDavide Pico, Björn Schulz, Alexander Lüking, Thomas Gries
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Abstract
A method for producing an inorganic silica gel fiber or aerogel fiber, comprising the following steps: a) extrusion of a gel, in particular a hydrogel or alcogel, by means of a spinneret directly into a coagulation bath to form at least one filament, b) stretching of the filament in the coagulation bath, c) regeneration of the filament by extraction from the coagulation bath, and d) supercritical drying or freeze drying in order to convert the filament into a silica fiber, in particular an aerogel fiber.
Claims12
A method of producing an inorganic type of silica or aerogel fiber, comprising the steps of:
- extruding a gel through a spinnerette die as at least one filament directly into a coagulation bath,
- stretching the filament in the coagulation bath,
- regenerating the filament by extraction from the coagulation bath,
- supercritical drying or freeze drying to transform the filament into a silica fiber or an aerogel fiber.
An apparatus for producing an inorganic type of silica or aerogel fiber, comprising:
- a stock supply vessel configured to contain a gel,
- a spinnerette die configured to extrude at least one filament from the gel,
- a tub for configured as a coagulation bath,
- at least one stretching device configured to stretch the filament in the tub,
- an extraction device, and
- a drying device outside the tub.
A shaped article comprising aerogel fibers, wherein the shaped article comprises 50 wt % to 100 wt % of aerogel fibers, and wherein any balance consists of other fibers and/or a binder.
A fiber web comprising aerogel fibers, wherein the fiber web comprises 10 wt % to 100 wt % of aerogel fibers and any balance consists of other fibers and/or a binder.
Dependencies are inferred from the claim text.