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Porous adsorbent with surface expressed by polycarboxylic acid, preparation method of porous adsorbent and application of porous adsorbent

A technology of porous adsorbent and polycarboxylic acid, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as difficult to remove cationic pollutants, and achieve the effect of simple production

Active Publication Date: 2018-05-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to electrostatic repulsion, the material is difficult to remove cationic pollutants

Method used

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  • Porous adsorbent with surface expressed by polycarboxylic acid, preparation method of porous adsorbent and application of porous adsorbent
  • Porous adsorbent with surface expressed by polycarboxylic acid, preparation method of porous adsorbent and application of porous adsorbent

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Embodiment 1

[0035]A method for preparing a porous adsorbent whose surface is expressed by polycarboxylic acid, adding 3.5-6.0 volumes of water dropwise to 1 volume of a cross-linkable polymeric oil phase containing a linear amphiphilic polymer, stirring while adding, forming Water-in-oil type thick emulsion, the thick emulsion is left standing and heated to hatch into an elastic porous material, washed with ethanol, and dried to obtain a porous material whose pore surface is expressed by a hydrophilic segment of a linear amphiphilic polymer, and the hydrophilic segment is treated to make It is expressed by carboxylic acids, resulting in said porous adsorbent whose surface is expressed by polycarboxylic acids.

[0036] The oil phase in this embodiment is composed of 60-90 parts of mono-olefin / diene, 0-30 parts of solvent, 5-25 parts of linear amphiphilic polymer and 0.5-2 parts of free radical initiator.

[0037] The linear amphiphilic polymer is a block copolymer obtained in any way with ...

Embodiment 2

[0054] In Example 1, hydroxyethyl acrylate was used instead of hydroxyethyl methacrylate; tert-butyl acrylate was used instead of tert-butyl methacrylate to synthesize amphiphiles and porous materials, and porous adsorption materials could be similarly obtained.

[0055] Adsorption of water pollutants. Take 100mL containing methylene blue (10 -7 mol / L) of water, cut a piece of the above-mentioned adsorbent (about 1g) into it, and stirred gently with magnetic force for 9 days. The adsorbent was taken out, the water sample was concentrated 100 times by freeze-drying method, and detected by ultraviolet-visible spectrometer. After conversion, the residual amount of methylene blue in the raw water sample is about 0.08ppm.

Embodiment 3

[0057] In the synthesis of the amphiphile in Example 2, polyethylene glycol acrylate (the degree of polymerization of polyethylene glycol is 4-5) was used instead of hydroxyethyl acrylate to synthesize the amphiphile similarly and used for the synthesis of porous materials.

[0058] Adsorption of water pollutants. Take 100mL containing basic red 14 (10 -7 mol / L) of water, cut a piece of the above-mentioned adsorbent (about 1g) into it, and stirred gently with magnetic force for 9 days. The adsorbent was taken out, the water sample was concentrated 100 times by freeze-drying method, and detected by ultraviolet-visible spectrometer. After conversion, the residual amount of methylene blue in the raw water sample is about 0.05ppm.

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Abstract

The invention relates to a porous adsorbent with a surface expressed by polycarboxylic acid, a preparation method of the porous adsorbent and an application of the porous adsorbent. 3.5-6.0mL of wateris dropped into 1mL of cross-linked polymerized oil phase with a linear amphiphilic polymer, dropping and stirring are simultaneously performed, water-in-oil type concentrated emulsion is formed andheated and hatched into an elastic porous material in a standing manner, the porous material is washed by ethyl alcohol and dried to obtain the porous material with the hole surface expressed by a hydrophilic section of the linear amphiphilic polymer, and the hydrophilic section is treated and expressed by carboxylic acid to obtain the porous adsorbent with the surface expressed by the polycarboxylic acid. Compared with the prior art, the porous adsorbent is provided with a macroscopic material, the porous adsorbent is directly added into water and can adsorb and remove pollutants such as cationic dyes, cationic surface active agents, arene and metals in water under the condition of pH (potential of hydrogen)=4-9, and the adsorbed pollutants can be released in an acid environment and can be reused after being cleaned with water.

Description

technical field [0001] The invention belongs to the field of adsorption functional materials and water purification, and relates to a surface-structured porous adsorption material and its preparation method and application, in particular to a porous adsorbent whose surface is expressed by polycarboxylic acid, its preparation method and application. Background technique [0002] The removal of pollutants in water is a common challenge faced by all mankind today. On the one hand, from the perspective of industrialization, urbanization and population growth, the overall clean water supply situation is further deteriorating. On the other hand, fresh water supplies may continue to decline. As the Arctic glaciers recede year by year, several important rivers in Asia will evolve into intermittent rivers, and more than 1 billion people will be directly affected. What is currently lacking is a low-cost, low-energy, low-input, and easy-to-promote water treatment technology. Convent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20C02F101/30C02F101/32C02F101/38
CPCB01J20/265C02F1/285C02F2101/20C02F2101/308C02F2101/322C02F2101/38
Inventor 万德成金明潘海燕
Owner TONGJI UNIV
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