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Cellulose solution prepared with low energy consumption and novel preparation thereof

A cellulose solution and low energy consumption technology, applied in the field of materials, can solve the problems of difficult operation, high equipment requirements, high energy consumption, etc., and achieve the effect of simple experimental conditions and reduced energy consumption

Inactive Publication Date: 2009-04-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a cellulose solution prepared with low energy consumption and a new method thereof, which overcomes the shortcomings of the existing patents such as limited dissolving capacity, high energy consumption, difficult operation and high requireme

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] Step (1) First place 68 grams of a mixed solution containing 7% by weight of lithium hydroxide and 93% by weight of water stored in a container in a refrigerator and take it out when it is pre-cooled to 5°C;

[0024] Step (2) adding 32 grams of viscose fiber with a degree of polymerization of 200 with a weight percentage of 32% to the above mixed solution and uniformly stirring for 3 minutes to generate an alkali cellulose solution;

[0025] Step (3) Add 100 grams of 6% and 14% thiourea and urea aqueous solutions that have been pre-cooled to 15°C in the alkali cellulose solution, and stir evenly for 5 minutes to obtain a transparent cellulose solution .

[0026] The total time for preparing the cellulose solution is 8 minutes. The final weight percentages of the substances contained in the prepared cellulose solution are: 16% cellulose, 3.5% lithium hydroxide, 3% thiourea, 7% urea, and the rest are water. According to the patent application No. 2007100461...

Example Embodiment

[0027] Example 2

[0028] Step (1) First place 90 grams of a mixed solution containing 6% by weight of lithium hydroxide and 94% by weight of water stored in a container in a refrigerator and take it out when it is pre-cooled to 10°C;

[0029] Step (2) adding 10 grams of viscose fiber with a degree of polymerization of 300 with a weight percentage of 10% to the above mixed solution and uniformly stirring for 3 minutes to generate an alkali cellulose solution;

[0030] Step (3) Add 100 grams of 0% and 30% thiourea and urea aqueous solutions that have been pre-cooled to 15°C in the alkali cellulose solution, and stir evenly for 3 minutes to obtain a transparent cellulose solution .

[0031] The total time for preparing the cellulose solution is 6 minutes. The final weight percentages of the substances contained in the prepared cellulose solution are: cellulose 5%, lithium hydroxide 3%, thiourea 0%, urea 15%, and the rest are water. According to the patent application No. 20071004618...

Example Embodiment

[0032] Example 3

[0033] Step (1) First place 84 grams of a mixed solution containing 9% by weight of lithium hydroxide and 91% by weight of water stored in a container in a refrigerator and take it out when it is pre-cooled to 5°C;

[0034] Step (2) adding 16 grams of cotton pulp with a degree of polymerization of 400 with a weight percentage of 16% to the above mixed solution and uniformly stirring for 5 minutes to generate an alkali cellulose solution;

[0035] Step (3) Add 100 grams of thiourea and urea aqueous solutions which have been pre-cooled to 5°C with a weight percentage of 14% and 2% respectively in the alkali cellulose solution, and stir evenly for 4 minutes to obtain a transparent cellulose solution .

[0036] The total time for preparing the cellulose solution is 9 minutes. The final weight percentages of the substances contained in the prepared cellulose solution are: 8% cellulose, 4.5% lithium hydroxide, 7% thiourea, 1% urea, and the rest are water. According to...

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Abstract

The invention belongs to the field of material, and provides a cellulose solution prepared with low energy consumption and a novel method for preparing the same. The cellulose solution consists of the following materials in the final weight percentage: 2 to 16 percent of cellulose, 3 to 7 percent of lithium hydroxide, 0 to 7 percent of thiourea, 1 to 15 percent of urea, and the balance being water. The cellulose solution prepared by the novel method has the advantages that the cellulose solution does not need the dissolution process of freezing and unfreezing, and can completely dissolve the cellulose in a short time at room temperature; the cellulose solution is suitable for dissolving various celluloses, and has better dissolving capability to the cellulose with high molecular weight; moreover, the cellulose solution can also be used to prepare the cellulose solution with higher solid content, so that the cellulose solution has wider application prospect.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a cellulose solution prepared with low energy consumption and a new method thereof. Background technique [0002] With the increasing global environmental pollution and the threat to sustainable development caused by the rapid depletion of petroleum energy and natural resources, as well as the improvement of public awareness of environmental protection, green industry has risen again as an important part of the green revolution. Plant cellulose is the most abundant renewable resource on earth, and it is an environmentally friendly material. The chemical structure of cellulose is a linear polymer composed of D-glucopyranose rings connected to each other by β-1,4-glycosidic bonds in Cl chair conformation. The cell walls of higher plants generally contain cellulose (cotton cellulose content is 88-96%, and wood and bagasse are about 50%). Compared with other polymers, the repeating units of c...

Claims

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Application Information

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IPC IPC(8): C08J3/05C08L1/02
Inventor 俞建勇张帅袁彬兰李发学
Owner DONGHUA UNIV
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