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Magnetic cationic hydrogel composite adsorption material with good thermal stability

A cationic hydrogel and composite adsorption material technology, applied in the field of composite materials and environmental science, can solve the problems of inappropriate adsorption materials, low mechanical strength, low thermal stability, etc., and achieve a simple and fast preparation method, easy separation and regeneration , the effect of high thermal stability

Inactive Publication Date: 2020-04-10
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the monomer involved in this invention will decompose at 120°C, has low thermal stability, low mechanical strength and high monomer price, and is currently not suitable as a raw material for mass-produced adsorption materials.

Method used

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  • Magnetic cationic hydrogel composite adsorption material with good thermal stability
  • Magnetic cationic hydrogel composite adsorption material with good thermal stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 5g of methacryloylpropyltrimethylammonium chloride (MAPTAC) monomer, add 0.6g of cross-linking agent N,N'-methylenebisacrylamide (MBA) to it, and then add 0.8mL of pure water Stir, and after the cross-linking agent MBA is completely dissolved, add 0.1mL accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.2g magnetic γ-Fe 3 o 4 , after all the above substances are mixed evenly, add 1.5mL initiator saturated potassium persulfate (KPS) solution, stir and react in 80°C water bath for 1h. After the gel is formed, transfer the cationic magnetic hydrogel to a glass bottle, immerse in pure water for 5 days, and change the water every 8 hours to wash away unreacted monomers, cross-linking agents, accelerators and initiators and other substances. Then the hydrogel was freeze-dried, ground and sieved for future use.

[0041] Prepare 15 mL of deionized water containing 20% ​​(V / V) ethanol, and dissolve 6 g of La(NO 3 ) 3 dissolve in it. Add 2g of hydrogel pow...

Embodiment 2

[0044] Weigh 5g of methacryloylpropyltrimethylammonium chloride (MAPTAC) monomer, add 0.8g of cross-linking agent N,N'-methylenebisacrylamide (MBA) to it, and then add 0.8mL of pure water Stir, and after the cross-linking agent MBA is completely dissolved, add 0.2mL accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.2g magnetic γ-Fe 2 o 3 , after all the above substances are mixed evenly, add 2mL initiator saturated potassium persulfate (KPS) solution, stir and react in 80°C water bath for 1h. After the gel is formed, transfer the cationic magnetic hydrogel to a glass bottle, immerse in pure water for 5 days, and change the water every 8 hours to wash away unreacted monomers, cross-linking agents, accelerators and initiators and other substances. Then the hydrogel was freeze-dried, ground and sieved for future use.

[0045] The magnetic cationic hydrogel particles were impregnated in saturated FeCl 3 and LaCl 3 In the solution, stir and mix continuously at con...

Embodiment 3

[0048] Weigh 5g of methacryloylpropyltrimethylammonium chloride (MAPTAC) monomer, add 0.6g of cross-linking agent N,N'-methylenebisacrylamide (MBA) to it, and then add 0.8mL of pure water Stir, and after the cross-linking agent MBA is completely dissolved, add 0.1mL accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.2g magnetic γ-Fe 3 o 4 , after all the above substances are mixed evenly, add 1.5mL initiator ammonium persulfate (APS) solution, and stir and react in a 60°C water bath for 30min. After the gel is formed, transfer the cationic magnetic hydrogel to a glass bottle, immerse in pure water for 5 days, and change the water every 8 hours to wash away unreacted monomers, cross-linking agents, accelerators and initiators and other substances. Then the hydrogel was freeze-dried, ground and sieved for future use.

[0049] Prepare 15 mL of deionized water containing 30% (V / V) ethanol, mix 8 g of Zr(SO 4 ) 2 dissolve in it. Add 2g of hydrogel powder, magnetic...

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Abstract

The invention discloses a magnetic cationic hydrogel composite adsorption material with good thermal stability. The material mainly contains polymethacryloyl propyl trimethyl ammonium chloride (PMAPTAC) and active metals in different forms. The synthesis method comprises the following steps: uniformly mixing a cationic monomer methacryloylpropyl trimethyl ammonium chloride (MAPTAC) and a cross-linking agent in water according to a certain ratio, and adding an accelerator, a magnetic material and an initiator to carry out a free radical polymerization reaction so as to synthesize a hydrogel material; and drying, grinding and sieving the hydrogel material, and loading active metals in different forms in situ to prepare the magnetic cationic hydrogel composite adsorption material with good thermal stability. The prepared composite adsorption material has high surface positive charges and specific adsorption sites, and can realize efficient and rapid adsorption of inorganic anionic pollutants in water. The material has the advantages of high adsorption capacity, high adsorption rate, easy separation and recovery, simple preparation method, low material cost, and wide application prospect, and can still maintain relative stability at a high temperature of 240 DEG C.

Description

technical field [0001] The invention relates to the fields of composite materials and environmental science and technology, in particular to a magnetic cationic hydrogel-based composite adsorption material with good thermal stability and its application. Background technique [0002] Water is the basic need to maintain life and health, and my country is a country with scarce water resources. Therefore, limited water resources and increasing urbanization urgently require more advanced technologies to protect water quality. Inorganic anions such as nitrate, phosphate, and fluoride exist in large quantities in water, which will cause harm to the human body and the ecosystem. Phosphorus (P) is an essential element for DNA, RNA and ATP, and thus one of the key nutrients in most aquatic and terrestrial ecosystems. When the concentration of phosphate in the water body exceeds 0.02mg / L, it is enough to cause eutrophication, resulting in excessive growth of harmful algae, mass death...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/267B01J20/28047B01J20/28009
Inventor 王毅力周妍卿
Owner BEIJING FORESTRY UNIVERSITY