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Porous polymer with lipophobicity and pH responsiveness as well as preparation and application thereof

A porous polymer, responsive technology, used in other chemical processes, chemical instruments and methods, separation methods, etc.

Active Publication Date: 2020-01-07
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, the challenge of material design

Method used

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  • Porous polymer with lipophobicity and pH responsiveness as well as preparation and application thereof
  • Porous polymer with lipophobicity and pH responsiveness as well as preparation and application thereof
  • Porous polymer with lipophobicity and pH responsiveness as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a method for preparing a hydrophobic and oleophobic porous material, the steps are as follows:

[0042] (1) Mix 2.8g acrylamide, 0.5g N', N-methylenebisacrylamide, 8g F-127, 1.8mL diethylaminoethyl methacrylate was dissolved in 16.9g water to make an aqueous solution; 6.9mL 2-(perfluorooctyl)ethyl methacrylate was dissolved in 69.3mL toluene, stirred at 400rpm Next, the toluene solution was added to the above aqueous solution to form an emulsion, and then 0.3 g of ammonium persulfate and 0.16 mL of N,N,N,N-tetramethylethylenediamine were added to the emulsion.

[0043] (2) The above emulsion was polymerized at 40° C. for 1 hour. After the polymerization, water and toluene were removed and dried to obtain a hydrophobic and oleophobic porous material.

Embodiment 2

[0045] This embodiment provides a method for changing the hydrophobic and oleophobic porous material in Example 1 into a hydrophilic and oleophobic porous material by changing the pH,

[0046] The hydrophobic and oleophobic porous material prepared in Example 1 was soaked in 1 wt% HCl solution of water and ethanol for 1 hour, extracted with ethanol and dried to obtain a hydrophilic and oleophobic porous material.

Embodiment 3

[0048] This example provides a method for converting the hydrophilic and oleophobic porous material in Example 2 into the hydrophobic and oleophobic porous material in Example 1 by changing the pH.

[0049] The hydrophilic and oleophobic porous material prepared in Example 2 was soaked in a solution of 1 wt% triethylamine in water and ethanol for 1 hour, extracted with ethanol and dried to obtain a hydrophobic and oleophobic porous material.

[0050] figure 1 Curves a and b are the electron spectrum diagrams of the hydrophobic and oleophobic porous materials in Example 1 and the hydrophilic and oleophobic porous materials in Example 2, respectively. figure 2 It is the test chart of the water and octadecane contact angle of the hydrophobic and oleophobic porous material of embodiment 1 as a function of time. As can be seen from the figure, the above-mentioned hydrophobic and oleophobic porous material has stable oleophobicity, and the contact angle of hexadecane on its surface...

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Abstract

The invention relates to a preparation method of a porous polymer with hydrophobicity, lipophobicity and pH responsiveness. The method comprises the following steps of: adding an oil phase into an aqueous phase, and uniformly mixing to obtain an oil-in-water emulsion, wherein the aqueous phase comprises a water-soluble emulsifier, a water-soluble monomer, a pH responsive monomer, a water-soluble crosslinking agent, a water-soluble initiator and water, and the pH responsive monomer comprises amino-containing methacrylate and / or amino-containing acrylate monomers; performing interfacial initiation polymerization reaction on the oil-in-water emulsion at 30-80 DEG C to obtain the porous polymer with hydrophobic and oleophobic properties and pH responsiveness after the reaction is completed. The porous polymer is treated with a solution with pH of 0 to 4 to obtain a hydrophilic and oleophobic porous polymer. The hydrophilic and oleophobic porous polymer is reversibly converted to the hydrophobic and oleophobic porous polymer after treatment with a solution with pH of 9 to 13. By using the polymer, the functions of pH-controllable collection, removal and the like of water solutions froman oil-water solution mixture can be realized.

Description

technical field [0001] The invention relates to the fields of oil-water separation, heavy metal and pigment removal, in particular to a porous polymer with both oleophobicity and pH responsiveness and its preparation and application. Background technique [0002] Oil-water separation materials are of great significance for solving the world's major challenges such as water pollution and oil pollution. By learning from nature, people have successfully constructed a variety of materials with special wetting properties, such as superhydrophobic-superoleophilic materials, superhydrophilic-underwater superoleophobic materials, etc., which are used to separate oil or oil in water. of water. Among them, superhydrophilic-underwater superoleophobic materials are currently one of the most effective materials for removing water in oil. However, due to the potential lipophilicity of the material, it is easy to be contaminated by oil, which leads to a decrease in oil absorption perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F222/38C08F220/34C08F220/24C08J9/28B01J20/26B01J20/30B01D17/022C02F1/28
CPCB01D17/0202B01J20/261B01J2220/4806B01J2220/4812C02F1/285C08F220/56C08J9/28C08J2333/26C08F222/385C08F220/34C08F220/24
Inventor 张涛赵燕李晓敏
Owner SUZHOU UNIV
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