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Aminooxy structure-containing polymer and formaldehyde adsorbent, and preparation methods thereof

A formaldehyde adsorption and aminoxy technology, applied in chemical instruments and methods, separation methods, alkali metal compounds, etc., can solve the problems of non-renewable scavenging ability, unstable Schiff base, poor use effect, etc., and achieve excellent thermal stability Sexuality and chemical stability, excellent springback characteristics, and structural stability

Active Publication Date: 2019-09-06
临沂中科芯华新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Experiments have confirmed that formaldehyde and amino groups can react under weak acid catalysis or reflux conditions to form unstable Schiff bases, but this method is difficult to achieve at normal temperature and pressure
The existing formaldehyde adsorbents with nitrogen-containing groups generally have problems such as low efficiency, poor practical effect, non-renewable and fast failure of scavenging ability, etc.

Method used

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  • Aminooxy structure-containing polymer and formaldehyde adsorbent, and preparation methods thereof
  • Aminooxy structure-containing polymer and formaldehyde adsorbent, and preparation methods thereof
  • Aminooxy structure-containing polymer and formaldehyde adsorbent, and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0055] The RAFT polymerization of embodiment 1-1 methacrylic acid ethylene glycol acetate aminooxy ester monomer

[0056] This embodiment provides a kind of synthesis of poly(ethylene glycol acetate) aminooxy methacrylate, the end of the polymer has an aminooxy group, and its structural formula is as follows:

[0057]

[0058] The above-mentioned poly(ethylene glycol acetate) aminooxy methacrylate is prepared by RAFT polymerization method, comprising the following main steps:

[0059] a. Utilize the esterification reaction to synthesize the methacrylic acid ethylene glycol acetate aminooxy ester monomer containing aminooxy groups:

[0060] (1) if figure 1 As indicated, 0.8g of hydroxypropyl methacrylate, 1.0g of [(tert-butoxycarbonyl)aminooxy]acetic acid, 1.6g of N,N'-dicyclohexylcarbodiimide (DCC) and 100mg of 4-dimethyl Aminopyridine (DMAP) was dissolved in 10 mL of tetrahydrofuran in a 50 mL round bottom flask, and stirred at room temperature for 10 hours;

[0061] (2...

Embodiment 1-2

[0069] The ATRP polymerization of embodiment 1-2 p-aminooxystyrene monomer

[0070] This embodiment provides a synthesis of poly-p-aminooxystyrene, the end of the polymer has aminooxy groups, and its structural formula is as follows:

[0071]

[0072] The above-mentioned poly(p-aminooxystyrene) is prepared by ATRP polymerization method, including the following main steps:

[0073] (1) Dissolve 71mg of cuprous bromide and 98mg of bipyridyl in a 50mL round bottom flask with 10mL of toluene;

[0074] (2) feed nitrogen into the round bottom flask that solution is housed in step (1) and remove oxygen for 15 minutes;

[0075] (3) Dissolve 0.5g of p-aminooxystyrene and 0.2mL of ethyl bromoisobutyrate in a 50mL round bottom flask with 10mL of toluene;

[0076] (4) feed nitrogen into the round bottom flask that solution is housed in step (3) and remove oxygen in 15 minutes;

[0077] (5) Transfer the liquid in the round bottom flask in step (2) to the round bottom flask in step (4...

Embodiment 2-1

[0080] Embodiment 2-1 PHEMA, graphene oxide, melamine

[0081] The present embodiment provides a kind of preparation method of regenerable formaldehyde adsorbent, comprises the following main steps:

[0082] (1) Synthesis of aminooxy-containing polymers

[0083] Adopt the method for embodiment 1-1 to prepare poly(ethylene glycol acetate aminooxy methacrylate) (PHEMA);

[0084] (2) Preparation of graphene polymer composite airgel

[0085] (1) 10 mg of graphene oxide and 10 mg of PHEMA synthesized in step (1) are dispersed in a 50 mL beaker with 10 mL of water;

[0086] (2) Ultrasonic treatment of the solution obtained in step (1) for 2 hours;

[0087] (3) Soak the cut melamine foam (30mm×30mm×5mm) into the solution obtained in step (2), and squeeze it repeatedly;

[0088] (4) Add 20 mg of ascorbic acid to the solution obtained in step (3), and react at 70° C. for 10 hours;

[0089] (5) The foam obtained after the reaction in step (4) is taken out from the solution, dialyze...

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Abstract

The invention belongs to the technical fields of polymer materials technologies and harmful gas treatment, and particularly relates to an aminooxy structure-containing polymer and a formaldehyde adsorbent including the polymer, and preparation methods thereof. Reversible addition-fragmentation chain transfer (RAFT) polymerization or atom transfer radical polymerization (ATRP) is used to obtain thepolymer containing a large amount of aminooxy groups, the polymer and a two-dimensional carrier material are commonly loaded on porous melamine foam or polyurethane foam to prepare an aerogel material, and the aerogel material is a three-dimensional material capable of efficiently adsorbing gaseous formaldehyde, that is, the formaldehyde adsorbent. The formaldehyde adsorbent in the invention realizes reversible chemical adsorption of the formaldehyde gas at normal temperature under normal pressure in the absence of a catalyst, combines the high specific surface area of the carrier and the three-dimensional porous structure of the foam, and can be used for specifically and efficiently adsorbing the gaseous formaldehyde; and the formaldehyde can be desorbed under the action of dilute hydrochloric acid, so the formaldehyde adsorbent can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of polymer material technology and harmful gas treatment, and specifically relates to a polymer containing an aminooxy structure, a formaldehyde adsorbent containing the polymer, and a preparation method and application thereof. Background technique [0002] Formaldehyde is a colorless gas with a strong pungent smell, which is widely found in various decoration materials and new furniture. At present, formaldehyde has been identified as carcinogenic and teratogenic substances by the World Health Organization. Short-term exposure can cause people to stimulate allergies, lung, liver, and immune dysfunction; long-term exposure can cause nasopharyngeal cancer, colon cancer, brain cancer, leukemia, etc. Existing formaldehyde treatment methods have certain limitations. The physical adsorption method has limited adsorption capacity, is not easy to regenerate, and is prone to secondary pollution. The cost of phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/36C08F112/14B01J20/26B01J20/28B01J20/30B01D53/81B01D53/72
CPCB01D53/72B01D53/81B01J20/261B01J20/28047C08F112/14C08F120/36C08F2438/01C08F2438/03
Inventor 刘敬权刘震
Owner 临沂中科芯华新材料科技有限公司
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