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Polymer capable of quickly adsorbing low-concentration formaldehyde, and preparation method thereof

A low-concentration, polymer-based technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of low adsorption capacity and limitation of adsorption capacity, and achieve large specific surface area, low production cost and simple preparation method Effect

Inactive Publication Date: 2020-05-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, activated carbon also has its limitations: activated carbon components are mostly inert carbon, but the amount of nitrogen-containing and oxygen-containing groups that have a significant effect on the adsorption of formaldehyde is often extremely low, resulting in a low adsorption capacity of activated carbon for formaldehyde
Patent CN103691411A uses chitosan and cyclodextrin to polymerize, and the formaldehyde adsorption capacity of the synthesized polymer reaches 13mg / g at 35ppm, but its adsorption capacity is limited due to the lack of micropores

Method used

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  • Polymer capable of quickly adsorbing low-concentration formaldehyde, and preparation method thereof
  • Polymer capable of quickly adsorbing low-concentration formaldehyde, and preparation method thereof
  • Polymer capable of quickly adsorbing low-concentration formaldehyde, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) 0.600g of β-cyclodextrin and 0.200g of tetrachloroterephthalonitrile and 0.900g of potassium carbonate were dissolved in 16ml of solvent (H 2 O: the volume ratio of DMF is 10:1), obtains mixed solution;

[0040] (2) Sonicate the mixed solution obtained in step (1) for 1 min, purging the solution with nitrogen for 60 min, put the mixed solution into a microwave reactor, heat and stir the reaction at 60 ° C with 50 W power for 20 h, and the porous β-cyclodextrin polymer;

[0041] (3) Wash the porous β-cyclodextrin polymer with hydrochloric acid until no bubbles are generated, filter it, soak it in water and dichloromethane for 24 hours to activate it, and dry it in vacuum at 55°C to obtain the activated porous β-cyclodextrin polymer , denoted as P-CDP-1.

Embodiment 2

[0043] (1) 0.600g of β-cyclodextrin and 0.300g of tetrachloroterephthalonitrile and 0.900g of potassium carbonate were dissolved in 16ml of solvent (H 2 O: the volume ratio of DMF is 10:1), obtains mixed solution;

[0044] (2) Sonicate the mixed solution obtained in step (1) for 30 minutes, purging the solution with nitrogen for 1 minute, put the mixed solution in a microwave reactor, heat and stir at 120°C for 3 hours with 30W power, and the porous β-cyclodextrin polymer;

[0045] (3) Wash the porous β-cyclodextrin polymer with hydrochloric acid until no bubbles are generated, filter and soak in water and dichloromethane for 48 hours to activate, and vacuum-dry at 90°C to obtain the activated porous β-cyclodextrin polymer , denoted as P-CDP-2.

Embodiment 3

[0047] (1) Dissolve 0.600g of β-cyclodextrin, 0.400g of tetrafluoroisophthalonitrile and 0.900g of potassium carbonate in 16ml of solvent (the volume ratio of tetrahydrofuran:DMF is 9:1) to obtain a mixed solution ;

[0048] (2) Sonicate the mixed solution obtained in step (1) for 15 minutes, purging the solution with nitrogen for 30 minutes, put the mixed solution in a microwave reactor, heat and stir at 90°C for 12 hours with a power of 75W, and the porous β-cyclodextrin polymer;

[0049] (3) Wash the porous β-cyclodextrin polymer with hydrochloric acid until no bubbles are generated, filter and soak in water and dichloromethane for 10 minutes to activate, and dry in vacuum at 30°C to obtain the activated porous β-cyclodextrin polymer , denoted as P-CDP-3.

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Abstract

The invention discloses a polymer capable of rapidly adsorbing low-concentration formaldehyde, and a preparation method thereof. The method comprises the following steps: (1) dissolving beta-cyclodextrin, a ligand and a reaction catalyst into a solvent; (2) carrying out ultrasonic treatment on the mixed solution obtained in the step (1), purging the mixed solution with gas, and then carrying out aheating stirring reaction; and (3) washing the porous beta-cyclodextrin polymer obtained in the step (2), filtering, soaking, activating, and drying to obtain the polymer. The formaldehyde adsorbentbased on beta-cyclodextrin has excellent formaldehyde adsorption performance. Compared with the existing formaldehyde adsorbing material, the formaldehyde adsorbent of the invention has the advantagesthat the adsorption rate and the adsorption amount of low-concentration formaldehyde are greatly increased, the adsorption amount reaches 28.9 mg / g under 10 ppm and is 80 times that of common activecarbon, the adsorption rate is more than 10 times that of the common active carbon, and the requirement for rapid and efficient adsorption of indoor formaldehyde is met, so that the adsorbent has a great potential application prospect in the aspect of indoor low-concentration formaldehyde adsorption.

Description

technical field [0001] The invention relates to the field of removal of gaseous formaldehyde, in particular to a polymer capable of rapidly adsorbing low-concentration formaldehyde and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, interior decoration often uses complex and diverse decoration materials and furniture, which will inevitably bring some indoor environmental pollution. The latest test results released by China Interior Decoration Association and Indoor Environment Monitoring Working Committee show that formaldehyde has become the main pollutant in newly decorated homes and offices. Formaldehyde is a highly toxic gas molecule. Long-term, low-concentration exposure to formaldehyde can cause headache, dizziness, fatigue, sensory disturbance, decreased immunity, and drowsiness, memory loss or neurasthenia. Newly decorated rooms have high formaldehyde content, which is the main cause of many diseases, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08B37/16B01J20/24B01J20/30B01D53/02C08L5/08
CPCB01D53/02B01D2253/202B01D2257/708B01J20/24B01J2220/4825C08B37/0012C08J9/286C08J2201/0502C08J2201/0504C08J2205/042C08J2305/08
Inventor 夏启斌张鑫宇姚晋泽
Owner SOUTH CHINA UNIV OF TECH
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