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Chitosan/lithium chloride composite membrane, preparation method and applications thereof

A chitosan, lithium chloride technology, applied in chemical instruments and methods, separation methods, membrane technology and other directions, can solve problems such as limitations, and achieve the effects of convenient operation, high separation performance, and improved dehumidification performance

Inactive Publication Date: 2014-03-05
QIQIHAR UNIVERSITY
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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 solve the limitations and defects of the traditional dehumidification method for air dehumidification

Method used

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  • Chitosan/lithium chloride composite membrane, preparation method and applications thereof
  • Chitosan/lithium chloride composite membrane, preparation method and applications thereof
  • Chitosan/lithium chloride composite membrane, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Use an electronic balance to accurately weigh 2g of chitosan with a degree of deacetylation of not less than 90%, add it to a 1% (v / v) acetic acid aqueous solution, and prepare a chitosan film casting solution with a total mass of 100g. Use a magnetic stirrer for uniform stirring at room temperature to obtain a completely dissolved chitosan solution.

[0029] (2) Use a Buchner funnel with two layers of filter paper to suction filter the completely dissolved chitosan casting film solution, and remove the tiny insoluble matter still remaining in the solution through filtration;

[0030] (3) Use the combined method of standing and vacuuming to remove bubbles from the chitosan casting film solution after removing impurities, and finally ensure that the chitosan casting film solution is bubble-free under a negative atmospheric pressure;

[0031] (4) Casting the chitosan film solution prepared by the above steps into a film-casting plate solution into a uniform thickness and dry...

Embodiment 2

[0047] (1) Use an electronic balance to accurately weigh 2g of chitosan with a degree of deacetylation not less than 90% and a certain mass of lithium chloride (the mass ratio of chitosan to lithium chloride is 20:1), and add to 1% ( v / v) acetic acid aqueous solution, prepare a total mass of 100g chitosan / lithium chloride mixed casting film solution, use a magnetic stirrer at room temperature for uniform stirring, to obtain completely dissolved chitosan / lithium chloride Cast film solution.

[0048] (2) Use a Buchner funnel with two layers of filter paper to suction filter the completely dissolved chitosan / lithium chloride casting film solution, and remove the tiny insoluble matter still remaining in the solution by filtration;

[0049] (3) Use the combined method of standing and vacuuming to remove bubbles from the chitosan / lithium chloride casting film solution after removing impurities, and finally ensure that the solution is bubble-free under a negative atmospheric pressure;

[0...

Embodiment 3

[0066] (1) Use an electronic balance to accurately weigh 2g of chitosan with a degree of deacetylation of not less than 90% and 0.2g of lithium chloride (the mass ratio of chitosan to lithium chloride is 10:1), and add to 1% (v / v) acetic acid aqueous solution, prepare a total mass of 100g chitosan / lithium chloride mixed casting film solution, use a magnetic stirrer at room temperature for uniform stirring, to obtain a completely dissolved chitosan / lithium chloride casting Membrane solution.

[0067] (2) Use a Buchner funnel with two layers of filter paper to suction filter the completely dissolved chitosan / lithium chloride casting film solution, and remove the tiny insoluble matter still remaining in the solution by filtration;

[0068] (3) Use a combined method of standing and vacuuming to remove bubbles from the chitosan / lithium chloride casting film solution after removing impurities, and finally ensure that the solution is bubble-free under a negative atmospheric pressure;

[0...

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Abstract

The invention discloses a chitosan / lithium chloride composite membrane, a preparation method and applications thereof. The main components of the composite membrane are chitosan and lithium chloride. In the membrane, through the interaction forces between hydrogen bonds, a compact structure which is formed by drying is enable to have a high separation property, and the dampness eliminating property of chitosan membrane is changed at the same time, wherein the mass ratio of the chitosan to the lithium chloride is 20:1 to 5:2. The invention also discloses a preparation method of the chitosan / lithium chloride composite membrane. The preparation method comprises the following steps: preparing a membrane casting solution, removing insoluble substances in the membrane casting solution, eliminating the bubbles in the membrane casting solution, carrying out a tape casting process, and finally drying so as to obtain the membrane. The prepared chitosan / lithium chloride composite membrane with a proper mass ratio has a better dampness removing property, can be applied to the field of air dampness removing and cooperatively used with a membrane dampness removing technology, overcomes the shortages of large equipment, high energy consumption, and requirement on a regeneration process, and has the advantages of high performance, environment-friendliness, and economic profit.

Description

technical field [0001] The invention relates to a mixed membrane and its preparation method and application, in particular to a preparation method of a chitosan / lithium chloride mixed membrane and its application in air dehumidification. Background technique [0002] Proper humidity control has gradually become a common problem in daily life, specific environment, agricultural production, industrial production, bridge construction and other fields. In daily life, the air humidity needs to be controlled within a certain range. If the relative humidity is too high or too low, it will cause sensory discomfort and even damage human health; It will cause loss to precious paintings, sculptures, documents and mechanical equipment in the place; in southern China, high temperature and high humidity from July to September will cause large-scale greenhouses to stop production, while high humidity in winter will inhibit plant growth and induce pest diseases; Semiconductors, precision i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/08B01D67/00B01D53/22B01D53/26
Inventor 李金龙隋国哲高金强
Owner QIQIHAR UNIVERSITY
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