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A kind of superhydrophobic cotton filter cloth and preparation method thereof

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

Active Publication Date: 2022-04-05
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 polymer materials, and relates to a superhydrophobic cotton filter cloth and a preparation method thereof, comprising: (1) feeding nitrogen gas into a reaction vessel, adding filter cloth, DCM, TEA and Mix DMAP evenly, add BiB dropwise, and stir for esterification reaction; then raise the temperature to 30±5°C for constant temperature reaction for 3 to 8 hours; then separate the filter cloth and wash it, and dry it in vacuum to obtain an esterification filter cloth; (2) to the reaction Into the container nitrogen, add esterified filter cloth, CuBr 2 , ethanol and 1-alkane monomer, finally add PMEDTA and mix evenly, then drop Vc-ethanol solution to carry out hydrophobic grafting modification reaction; then separate the filter cloth and ultrasonic cleaning, Soxhlet extraction and vacuum drying, A hydrophobically modified cotton filter cloth is obtained. The contact angle of the obtained filter cloth reaches 145°, and the decay rate of the contact angle after 30 minutes is only 5.5%, which has obvious superhydrophobicity and hydrophobic 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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Patent Type & Authority Patents(China)
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