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Solvent composition and preparation method and application thereof

A solvent and water solvent technology, applied in textiles and papermaking, rayon in cellulose solution, chemical characteristics of fibers, etc., to achieve the effects of excellent product performance, efficient and simple processing, and good spinnability

Inactive Publication Date: 2009-10-14
SHENZHEN HUAYA CNC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to disclose a cheap, non-polluting and simple cellulose solvent to overcome the defects of the prior art, and to provide a method for rapidly dissolving cellulose and preparing cellulose fibers with excellent performance by using the solvent , Membranes, Porous Materials, and Carbon Materials Methods

Method used

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  • Solvent composition and preparation method and application thereof
  • Solvent composition and preparation method and application thereof
  • Solvent composition and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get 17.5 grams of cotton pulp (polymerization degree 500), add 200 grams of 4wt% lithium hydroxide / 1wt% sodium hydroxide / 3wt% thiourea aqueous solution (pre-cooled to -6 ℃), then at 0 ℃ (through a brine bath temperature control) and vigorously stirred for 10 minutes, the cotton pulp was completely dissolved to obtain a clear cellulose solution with a cellulose concentration of 8 wt%. figure 1 Shown is the photo of the solution stored at 4°C for one month. The cellulose solution did not gel, and it degassed naturally during the standing process, indicating that the quality of the solution was very good.

Embodiment 2

[0028] Get 13 grams of cotton pulp (polymerization degree 500), add 200 grams of 7wt% lithium hydroxide / 0.1wt% sodium hydroxide / 6wt% thiourea aqueous solution (pre-cooled to 5 ℃), then at 0 ℃ (by brine bath temperature control) and vigorously stirred for 10 minutes, the cotton pulp was completely dissolved to obtain a clear cellulose solution with a cellulose concentration of 6.1 wt%.

Embodiment 3

[0030] Get 8.4 grams of cotton pulp (polymerization degree 500), add in 200 grams of 0.1wt% lithium hydroxide / 12wt% sodium hydroxide / 0.1wt% thiourea aqueous solution (pre-cooled to-15 ℃), then at 0 ℃ (by brine bath temperature control) vigorously stirred for 10 minutes, and the cotton pulp was completely dissolved to obtain a clear cellulose solution with a cellulose concentration of 4 wt%.

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Abstract

The invention discloses a solvent composition and a preparation method and the application thereof. The water solvent is formed by a quaternary system containing lithium hydroxide, sodium hydroxide, thiourea and water , and has highest solvent power when the temperature is ranged from 15 DEG C below zero to 5 DEG C. The invention also discloses a method for fast dissolving cellulose by utilizing the water solvent and preparing regenerated cellulose membranes, fibers, porous materials and carbon materials with good properties. The water solvent system has the characteristics of high solvent power on the cellulose, stable obtained cellulose solution, good product property, no toxicum or pollution in the production process and low production cost, and overcomes the defect existing in the prior art, thereby having outstanding superiority.

Description

technical field [0001] The invention relates to a solvent composition, a preparation method and an application thereof, and belongs to the field of natural polymers, and also belongs to the fields of materials, textiles, chemical engineering, agriculture, environmental engineering and the like. Background technique [0002] Cellulose is the most abundant renewable resource on earth and may become a renewable resource to replace petrochemical products. Cellulose can be obtained from most plants such as trees, cotton, rice straw, and corn, as well as some bacteria. However, because natural cellulose is difficult to dissolve in water and common solvents, and difficult to melt process, it is still far from being fully utilized. For a long time, regenerated cellulose products still use the traditional viscose method to produce rayon and cellophane. Cellulose reacts with carbon disulfide under the action of strong alkali to form cellulose xanthate, which dissolves in dilute alka...

Claims

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Application Information

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IPC IPC(8): C08J3/05C08L1/02C08J5/18C08J9/00D01F2/02D01F9/16C01B31/02
Inventor 代建东
Owner SHENZHEN HUAYA CNC MASCH CO LTD
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