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Hyperbranched polyamide cross-linked cyclodextrin as well as synthesis method and application thereof

A technology of hyperbranched polyamide and cross-linked cyclodextrin, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. and other problems, to achieve excellent adsorption effect, broad application and development prospects, and the effect of large adsorption sites

Inactive Publication Date: 2022-04-12
何影
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of machinery manufacturing, metallurgy and mining and other industrial production, a large amount of heavy metal wastewater will be produced, containing heavy metal ions such as copper, chromium, mercury, etc., which is highly toxic and difficult to degrade, causing serious pollution to the environment and affecting human health and safety and social development. In recent years, the development of efficient adsorption materials for the adsorption and treatment of heavy metal wastewater has become a research trend

Method used

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  • Hyperbranched polyamide cross-linked cyclodextrin as well as synthesis method and application thereof
  • Hyperbranched polyamide cross-linked cyclodextrin as well as synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 3.5g of N,N-methylenebisacrylamide to a mixed solvent of 20mL of distilled water and 16mL of methanol, dropwise add 3g of triethylenetetramine, and raise the temperature to 65°C in a nitrogen atmosphere to react After 24 hours of reaction, distill under reduced pressure, and wash the product with acetone and dichloromethane to prepare a hyperbranched polyamide with an amino terminal.

[0025] (2) Add 1g of cyclodextrin to 5mL of pyridine, heat to dissolve, then add 0.5g of p-toluenesulfonyl chloride dropwise, react in an ice bath for 3h, add acetone to precipitate after the reaction, filter, wash with acetone, and then add the product to In 6mL of triethylenetetramine, heat up to 60°C, react for 4 hours, cool down and add acetone to precipitate after reaction, filter, and wash with acetone to obtain triethylenetetramine-modified cyclodextrin.

[0026] (3) Add 0.5g of triethylenetetramine-modified cyclodextrin to 30mL of N,N-dimethylformamide solvent, stir well a...

Embodiment 2

[0028] (1) Add 3.5g of N,N-methylenebisacrylamide to a mixed solvent of 20mL distilled water and 20mL methanol, dropwise add 3.5g of triethylenetetramine, and raise the temperature to 65°C in a nitrogen atmosphere, After reacting for 36 hours, distilling under reduced pressure after the reaction, washing the product with acetone and dichloromethane to prepare a hyperbranched polyamide with amino terminal.

[0029] (2) Add 1g of cyclodextrin to 8mL of pyridine, heat to dissolve, then add 0.6g of p-toluenesulfonyl chloride dropwise, react in ice bath for 4h, add acetone to precipitate after the reaction, filter, wash with acetone, and then add the product to In 10mL of triethylenetetramine, heat up to 75°C, react for 10h, cool and add acetone to precipitate after reaction, filter, wash with acetone, and obtain triethylenetetramine-modified cyclodextrin.

[0030] (3) Add 0.8g of triethylenetetramine-modified cyclodextrin to 40mL of N,N-dimethylacetamide solvent, stir well and add...

Embodiment 3

[0032] (1) Add 3.5g of N,N-methylenebisacrylamide to a mixed solvent of 20mL distilled water and 30mL methanol, dropwise add 4.2g of triethylenetetramine, and raise the temperature to 80°C in a nitrogen atmosphere, After reacting for 30 h, distilling under reduced pressure after the reaction, washing the product with acetone and dichloromethane to prepare a hyperbranched polyamide with an amino terminal.

[0033] (2) Add 1g of cyclodextrin to 8mL of pyridine, heat to dissolve, then add 0.7g of p-toluenesulfonyl chloride dropwise, react in an ice bath for 5h, add acetone to precipitate after the reaction, filter, wash with acetone, and then add the product to In 12mL of triethylenetetramine, heat up to 75°C, react for 8h, cool down and add acetone to precipitate after reaction, filter, wash with acetone, and obtain triethylenetetramine-modified cyclodextrin.

[0034] (3) Add 1g of triethylenetetramine-modified cyclodextrin to 50mL of N-methylpyrrolidone solvent, stir well and a...

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Abstract

The invention relates to the technical field of environmental protection, and discloses hyperbranched polyamide cross-linked cyclodextrin, hyperbranched polyamide and cyclodextrin are cross-linked through a bipyridine group to obtain the hyperbranched polyamide cross-linked cyclodextrin, the hyperbranched polyamide has a unique highly-branched network molecular chain, and after the hyperbranched polyamide is cross-linked with cyclodextrin, the hyperbranched polyamide cross-linked cyclodextrin has a unique high-molecular-weight network molecular chain. A three-dimensional network structure is formed, a cross-linked product is larger in specific surface area, has a certain aperture structure, larger adsorption sites and higher adsorption performance, and a bipyridine group in the cross-linked product has very high coordination and chelation performance and can be coordinated and chelated with heavy metal ions such as Cu < 2 + > and the like; and the molecular chain of the cross-linked product contains abundant amino groups and imino groups, and also has an excellent adsorption effect on Cu < 2 + >, so that the hyperbranched polyamide cross-linked cyclodextrin can more efficiently remove heavy metal ions such as Cu < 2 + > in wastewater.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a hyperbranched polyamide crosslinked cyclodextrin, its synthesis method and application. Background technique [0002] In the process of machinery manufacturing, metallurgy and mining and other industrial production, a large amount of heavy metal wastewater will be produced, containing heavy metal ions such as copper, chromium, mercury, etc., which is highly toxic and difficult to degrade, causing serious pollution to the environment and affecting human health and safety and social development. In recent years, the development of efficient adsorption materials for the adsorption and treatment of heavy metal wastewater has become a research trend. [0003] Biomass polymers such as cellulose and cyclodextrin have a wide range of sources, are green and pollution-free, and have a wide range of applications in the fields of heavy metal wastewater treatment and enviro...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
Inventor 何影
Owner 何影
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