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Superhydrophobic cotton filter cloth and preparation method thereof

A filter cloth, water wool technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of hydrophobic function stability and reliability need to be strengthened, and achieve good hydrophobic stability and reliability, high-pass The effect of quantity, excellent performance stability

Active Publication Date: 2019-11-08
中科广化(重庆)新材料研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Among the technical methods for hydrophobic functional modification of cotton filter cloth, ATRP and its derivative methods are an effective technical choice, among which the ARGET-ATRP method has developed rapidly, but the hydrophobic functional modification of cotton filter materials The efficiency, stability and reliability of hydrophobic functions need to be strengthened

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This implementation provides a super-hydrophobic cotton filter cloth and its preparation method and application.

[0037] The preparation method of this superhydrophobic cotton filter cloth is as follows:

[0038] Step 1: Activation of filter cloth

[0039] At room temperature, the 8cm 2 (about 0.1g, 125g / m 2 ) size filter cloth sample in 2%wt activator-ethanol-acetone solution ultrasonically for 5min and then impregnated, then take out the filter cloth and wash it with an appropriate amount of ethanol until it is neutral, and vacuum-dry it to become an activated filter cloth.

[0040] Step 2: Activate the esterification reaction of the filter cloth

[0041] Nitrogen was passed into the three-necked reaction flask with a stirring reflux device, and activated filter cloth, 50ml of dichloromethane, 2.5ml of triethylamine, 0.6g of dimethylaminopyridine and 2.5ml of 2-bromoisobutyl were sequentially added at 5°C Acyl bromide, stirred at low temperature for 1 hour, then ...

Embodiment 2

[0046] This implementation provides a super-hydrophobic cotton filter cloth and its preparation method and application.

[0047] The preparation method of this superhydrophobic cotton filter cloth is as follows:

[0048] Step 1: Activation of filter cloth

[0049] At room temperature, the 8cm 2 (about 0.1g, 125g / m 2) size filter cloth sample in 2%wt activator-ethanol-acetone solution ultrasonically for 5min and then impregnated, then take out the filter cloth and wash it with an appropriate amount of ethanol until it is neutral, and vacuum-dry it to become an activated filter cloth.

[0050] Step 2: Activate the esterification reaction of the filter cloth

[0051] Nitrogen was passed into the three-necked reaction flask with a stirring reflux device, and activated filter cloth, 50ml of dichloromethane, 2.5ml of triethylamine, 0.6g of dimethylaminopyridine and 2.5ml of 2-bromoisobutyl were sequentially added at 5°C Acyl bromide, stirred at low temperature for 1 hour, then h...

Embodiment 3

[0056] This implementation provides a super-hydrophobic cotton filter cloth and its preparation method and application.

[0057] The preparation method of this superhydrophobic cotton filter cloth is as follows:

[0058] Step 1: Activation of filter cloth

[0059] At room temperature, the 8cm 2 (about 0.1g, 125g / m 2 ) size filter cloth sample in 2%wt activator-ethanol-acetone solution ultrasonically for 5min and then impregnated, then take out the filter cloth and wash it with an appropriate amount of ethanol until it is neutral, and vacuum-dry it to become an activated filter cloth.

[0060] Step 2: Activate the esterification reaction of the filter cloth

[0061] Nitrogen was passed into the three-necked reaction flask with a stirring reflux device, and activated filter cloth, 50ml of dichloromethane, 2.5ml of triethylamine, 0.6g of dimethylaminopyridine and 2.5ml of 2-bromoisobutyl were sequentially added at 5°C Acyl bromide, stirred at low temperature for 1 hour, then ...

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Abstract

The invention belongs to the technical field of functional polymeric materials and relates to superhydrophobic cotton filter cloth and a preparation method thereof. The preparation method comprises (1) introducing nitrogen into a reaction container, adding filter cloth, DCM (dichloromethane), TEA (triethylamine) and DMAP (dimethylamiopryidine) at 5-10 DEG C, mixing well, dropwise adding BiB (2-bromoisobutyryl bromide), and stirring to allow esterification to occur; heating to 30+ / -5 DEG C, and allowing to react at the constant temperature for 3-8 h; separating to obtain filter cloth, washing the filter cloth, and drying in vacuum to obtain esterified filter cloth; (2) introducing nitrogen into the reaction container, adding the esterified filter cloth, CuBr2, ethyl alcohol and a 1-alkyl-chain alkane monomer, adding PMEDTA (N,N,N',N'',N''-pentamethyldiethylenetriamine), dropwise adding Vc-ethanol solution, and carrying out hydrophobic grafting modification; separating to obtain filter cloth, ultrasonically washing the filter cloth, carrying out Soxhlet extraction, and drying in vacuum to obtain the superhydrophobic cotton filter cloth. A contact angle of the superhydrophobic cottonfilter cloth reaches 145 DEG, attenuation rate of the contact angle is only 5.5% after 30 min, and the superhydrophobic cotton filter cloth has evident superhydrophobicity and hydrophobicity stability.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and specifically relates to a superhydrophobic functional modification method for cotton filter cloth and its application. Background technique [0002] Filtration technology is widely used in the separation, purification, purification and other processes of substances. Commonly used filter materials include synthetic fibers, cotton fibers, metal mesh, etc. Among them, cotton fiber filter materials have the advantages of rich sources, renewable, and environmental safety, and their application range is very wide. widely. [0003] Conventional filter materials usually have the advantage of large filtration flux, but they cannot meet the technical requirements of high efficiency, high flux, and high precision separation. For this reason, it is necessary to modify the structure of the filter material to significantly improve and expand its functionality, such as anti-fouling, an...

Claims

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Application Information

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IPC IPC(8): D06M14/04D06M13/144D06M13/127B01D17/02B01D39/08D06M101/06
CPCD06M14/04D06M13/144D06M13/127B01D39/083B01D17/0202B01D2239/0428B01D2239/10D06M2101/06D06M2200/12
Inventor 靳焘李铮陈玉放周映成贺子健赖华杰
Owner 中科广化(重庆)新材料研究院有限公司