Application of chitosan, chitosan oligosaccharide and additives thereof to preparation of adsorbing agent for adsorbing air pollutants

An air pollutant, chitosan technology, applied in other chemical processes, dispersed particle filtration, dispersed particle separation, etc., can solve problems such as adverse effects and hazards of materials

Active Publication Date: 2015-03-04
MARINE BIOMEDICAL RES INST OF QINGDAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a certain range of the atmosphere, there are trace substances that did not exist before, and their

Method used

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  • Application of chitosan, chitosan oligosaccharide and additives thereof to preparation of adsorbing agent for adsorbing air pollutants
  • Application of chitosan, chitosan oligosaccharide and additives thereof to preparation of adsorbing agent for adsorbing air pollutants
  • Application of chitosan, chitosan oligosaccharide and additives thereof to preparation of adsorbing agent for adsorbing air pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The chitosan and oligochitosan of the present invention are polyglucosamine or acetylglucosamine connected by β-1,4 glycosidic bonds, the polymerization degree of chitosan>20, the molecular weight>5000Da, and the polymerization degree of chitosan oligosaccharide is 2 ~20, the molecular weight is 300~5000Da. The C2 amino group, C3 and C6 hydroxyl groups of chitosan and chitosan oligosaccharide are active groups, which are easily substituted by other groups to generate various chitosan derivatives, which can be single-substituted, double-substituted or triple-substituted. Such as oligochitosan sulfate, oligochitosan phosphate, etc., the molecular formula of oligochitosan is as follows:

[0022]

[0023] Take chitosan and oligochitosan of the present invention, add high-purity water, let it stand overnight, allow it to fully swell, dissolve, then pack into a 20ml spray bottle, and verify by spraying through a screen (40 orders, 80 orders) , while measuring the followin...

Embodiment 2

[0032] Inorganic salt ions (such as NH 4 + , NO 3 - ions, etc.) and heavy metals (including elements and ions) are important components of air pollutants and PM 2.5 common components in . Based on the concentration of inorganic ions in the air, prepare 0.01mol / L (NH 4 ) 2 SO 4 , 0.02mol / L NH 4 NO 3 and 0.001mol / L Pb(NO 3 ) 2 solution to simulate the concentration of inorganic ions in an aerosol. Add chitosan and its oligosaccharides to the solution, and use the conductivity as an index to investigate the adsorption or complexation of NH in the solution by chitosan and its oligosaccharides. 4 + , SO 4 2- , Pb 2+ and NO 3 - The role of plasma. Experimental operation steps:

[0033] (1) Prepare solutions and measure the conductivity of each solution.

[0034] (2) Each inorganic salt solution was mixed with each carbohydrate solution in pairs, and the electrical conductivity after mixing was measured.

[0035] (3) Calculate the decrease rate of electrical cond...

Embodiment 3

[0041] Embodiment 3, composite experiment

[0042] AGA is used to represent agar, and CHI is used to represent chitosan or chitooligosaccharide.

[0043] Experimental operation steps:

[0044] (1) Prepare solutions and measure the conductivity of each solution.

[0045] (2) Mix each inorganic salt solution with the compound carbohydrate solution respectively, and measure the electrical conductivity after mixing.

[0046] (3) Calculate the decrease rate of electrical conductivity.

[0047] The experimental results are shown in Table 3 below, and the sugar solution is named "mass concentration + molecular weight (kDa) + species".

[0048] Table 3 Compound Solution Causes Conductivity Decrease Rate (%)

[0049]

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Abstract

The invention provides application of chitosan, chitosan oligosaccharide and additives thereof to preparation of an adsorbing agent for adsorbing air pollutants. The chitosan and chitosan oligosaccharide are beta-1,4 glucosidic bond connected glucosaminoglycan or acetylglucosamine, the chitosan has the polymerization degree of more than 20, and has the molecular weight of more than 5000Da; the chitosan oligosaccharide is 2-20 in polymerization degree and is 3000-5000Da in molecular weight; and the chitosan, the chitosan oligosaccharide and additives thereof are prepared into aqueous solution or glycerite with the massic volume concentration of 0.1mug/mL-2000mg/mL to be used for preparing the adsorbing agent. The prepared adsorbing agent has wide application field, can be placed in a nasal cavity in any acceptable manners, for example placing in a mask, a face mask, a headgear, a headpiece and other protective tools, and can be sprayed nearby outlets of equipment exhausting air pollutants in any acceptable manners, such as indoor equipment, factory equipment and automobiles, and has good market application value.

Description

technical field [0001] The invention relates to a new application of chitosan, chitosan oligosaccharide and derivatives thereof, in particular to the application of chitosan, chitosan oligosaccharide and derivatives thereof in preparing an adsorbent for adsorbing air pollutants. Background technique [0002] In a dry atmosphere, the constant gas composition is negligible. However, in a certain range of the atmosphere, there are trace substances that did not exist before, and their quantity and duration may have adverse effects and harm on people, animals, plants, objects and materials. The phenomenon that the concentration of pollutants in the atmosphere or the secondary pollutants transformed by it reaches a harmful level is called air pollution. [0003] According to the state of existence of air pollutants, they can be divided into aerosol pollutants and gaseous pollutants. [0004] Aerosol pollutants generally include dust (particle size 1-200 μm), fly ash, smoke (part...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01D46/00
CPCB01D46/0001B01J20/24B01J20/30B01J2220/44
Inventor 管华诗夏萱王成王世欣庄波高会旺祁建华刘晓环姚小红
Owner MARINE BIOMEDICAL RES INST OF QINGDAO CO LTD
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