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Preparation method of novel silica gel-based hyperbranched PAMAM (polyamidoamine) chelating resin

A chelating resin and silica gel technology, which is applied in the preparation field of silica gel-based hyperbranched polymer new chelating resin, can solve the problems of difficult large-scale industrial production, loss of precise structure, cumbersome synthesis process, etc., and achieve strong chelation and encapsulation The effect of burial, cheap price and wide source of raw materials

Inactive Publication Date: 2011-08-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) The synthesis process of silica gel-based PAMAM dendrimers, its iterative synthesis process is cumbersome and expensive, making it difficult for large-scale industrial production
[0009] (2) The study of Silica-gel anchored PAMAM showed that due to the influence of steric hindrance and coupling side reactions, PAMAM grafted onto the surface of silica gel has lost its advantage of having a precise structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step (a): Take 15.0002g of 200-300 mesh silica gel into a 100ml three-neck flask, add 30ml of nitric acid solution with a volume ratio of 1:1, and reflux for 3 hours at 98°C under slight boiling. Filter through a G2 sand core funnel and wash with deionized water until neutral. Then soak in 50ml of hydrochloric acid solution with a volume ratio of 1:1 at room temperature for 6 hours. After filtering, it was washed with deionized water until neutral, and the filtrate was tested with silver nitrate solution. The treated silica gel was dried in a muffle furnace at 200° C. for 10 hours, and finally placed in a vacuum drying oven at 120° C. for 10 hours.

[0027] Step (b): Take 2.0000g of the silica gel activated in step (a) and place it in a 50ml single-necked round bottom flask, transfer 2ml of APTS (aminopropyltrimethoxysilane) into it with a pipette, and reflux at 120°C for 10 hours . After the product is filtered, it is placed in a Soxhlet extractor, refluxed with tol...

Embodiment 2

[0031] Step (a): Take 15.0002g of 100-200 mesh silica gel into a 100ml three-neck flask, add 30ml of nitric acid solution with a volume ratio of 1:1, and reflux for 3 hours at 98°C under slight boiling. Filter through a G2 sand core funnel and wash with deionized water until neutral. Then soak with 50ml of hydrochloric acid solution with a volume ratio of 1:1 at room temperature for 6 hours. After filtering, it was washed with deionized water until neutral, and the filtrate was tested with silver nitrate solution. The treated silica gel was dried in a muffle furnace at 200° C. for 10 hours, and finally placed in a vacuum oven at 120° C. for 10 hours.

[0032] Step (b): Take 2.0000g of the silica gel activated in step (a) and place it in a 50ml single-necked round bottom flask, transfer 2ml of APTS (aminopropyltrimethoxy) silane with a pipette, and reflux at 120°C for 10 hours . After the product is filtered, it is placed in a Soxhlet extractor, refluxed with toluene and eth...

Embodiment 3

[0036] Step (a): Take 15.0002g of 200-300 mesh silica gel into a 100ml three-neck flask, add 30ml of nitric acid solution with a volume ratio of 1:1, and reflux for 3 hours at 98°C under slight boiling. Filter through a G2 sand core funnel and wash with deionized water until neutral. Then soak with 50ml of hydrochloric acid solution with a volume ratio of 1:1 at room temperature for 6 hours. After filtering, it was washed with deionized water until neutral, and the filtrate was tested with silver nitrate solution. The treated silica gel was dried in a muffle furnace at 200° C. for 10 hours, and finally placed in a vacuum oven at 120° C. for 10 hours.

[0037] Step (b): Take 2.0000g of the activated silica gel in step (a) and place it in a 50ml single-necked round bottom flask, transfer 0.33ml of APTS (aminopropyltrimethoxysilane) into it with a pipette, and reflux at 120°C for 10 Hour. After the product is filtered, it is placed in a Soxhlet extractor, refluxed with toluene...

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Abstract

The invention discloses a novel silica gel-based PAMAM (polyamidoamine) hyperbranched macro-molecule chelating resin which is prepared by using aminated silica gel modified by a silane coupling agent as the core, directly adding an ABx type monomer (x>=2, and A and B are reactive groups) and carrying out one-step synthesis. The chelator prepared by the method can well adsorb heavy metal ions, can be repeatedly used, and has the advantages of simple synthesis process and low cost, thereby laying a foundation for large-scale production.

Description

technical field [0001] The invention relates to the research field of inorganic-macromolecule composite materials, in particular to a preparation method of a novel chelating resin of a silica gel-based hyperbranched polymer. Background technique [0002] The discharge of heavy metal ion wastewater is a major source of water pollution, which has caused great harm to human society. At the same time, many heavy metal ions in industrial wastewater are widely used and need to be recycled and reused. Therefore, through molecular design, the preparation of high-performance chelation adsorption materials that can not only efficiently treat heavy metal ions in wastewater, but also effectively separate and recover heavy metal ions has important environmental protection and resource reuse values. [0003] Since the 1990s, dendrimers and hyperbranched polymers have been research hotspots in the field of polymers. They are different from traditional linear macromolecules in that their m...

Claims

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Application Information

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IPC IPC(8): C08G69/42B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 赵艳秋范杰陈霞李嘉宁
Owner DALIAN UNIV OF TECH
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