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Clean new process for producing common and high performance isomeric viscose base carbon fiber (or film)

A viscose-based carbon fiber, high-performance technology, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of slow oxidation reaction speed, long oxidation time, and difficulty in online matching.

Inactive Publication Date: 2006-11-08
李换位
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AI Technical Summary

Problems solved by technology

The best temperature for surface treatment of carbon fiber by ozone oxidation is around 100°C. Below 100°C, the oxidation reaction speed is slow, the oxidation time is long, and online matching is difficult. Above 100°C, the ozone decomposition speed is fast and the oxidation effect is poor.

Method used

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Examples

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Embodiment Construction

[0013] The raw material pulp (or cotton pulp, or wood pulp, or grass pulp) is rinsed or rinsed with 5%-10% caustic soda solution at 25°C-45°C, and then filtered or squeezed, and the squeezed pulp The pulp is washed again in the same way with 2.5%-6.5% hydrochloric acid aqueous solution (or sulfuric acid or nitric acid or its mixed acid aqueous solution), except that the pickled pulp is no longer squeezed or filtered, but it is passed through The pulp rinsed with acid solution is oxidized under ultraviolet irradiation with hot and humid air at 35-100°C to form oxidized cellulose, and then neutralized and ammonified with ammonia (or treated with gas Ammonia fumigation or rinsing and ammoniation with an ammonia solution with a pH value of 8-10.5), and the ammoniated oxidized cellulose is dried to obtain isomerized pulp cellulose with certain flame retardancy or certain alkali solubility.

[0014] The obtained heterogeneous pulp cellulose is dissolved with 4%-10% caustic soda solu...

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Abstract

The new clean process of producing common and high performance viscose-base isomeric carbon fiber (or film) includes the following steps: alkali and acid washing material pulp, oxidizing or ammoniating to obtain fireproof isomeric pulp; dissolving the isomeric pulp in alkali solution to obtain spinnable isomeric viscose solution; debubbling the solution, spinning, washing with acid and deionized water and other step to obtain common isomeric viscose tow fiber or film; damp and heat drafting, drying to densify, heat shrinking to stabilize to obtain high performance fireproof isomeric viscose tow fiber or film; further soaking in ammonium salt aqua, pre-oxidizing, low temperature carbonizing, high temperature carbonizing and graphitizing of the common isomeric viscose tow fiber or film or the high performance fireproof isomeric viscose tow fiber or film to obtain common and high performance viscose-base isomeric carbon fiber or film; and final surface oxidation, sizing and drying to obtain the corresponding product.

Description

technical field [0001] The present invention relates to pulp (or cotton pulp, or wood pulp, or grass pulp) pre-oxidation treatment, and its clean isomerism viscose fiber (or film) spinning and heterogeneity viscose-based carbon fiber (or carbon fiber) film) manufacture. Background technique [0002] Existing viscose spinning solution preparation and spinning process with refining (acid, alkali treatment) pulp as raw material, its technological process is: put refined pulp in 10%-20% caustic soda aqueous solution, in Dipping at 25°C-45°C to make the cellulose react with NaOH to form alkali cellulose, and then press to remove the excess alkali and dissolved hemicellulose, then crush the pressed alkali cellulose and make it dry at 18 ℃ or 60 ℃ under constant temperature conditions for a certain period of time (that is, the aging of alkali cellulose), and then, the mature alkali cellulose is mixed with CS under strict temperature control conditions. 2 React to make it generate...

Claims

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Application Information

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IPC IPC(8): D01F9/16
Inventor 李换位
Owner 李换位
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