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Method for preparing polyamide amine tree-shaped macromolecule grafted starch-based carrier

A polyamidoamine dendrimer, grafted starch technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc. The effect of fast adsorption speed, simple preparation and large adsorption capacity

Inactive Publication Date: 2013-03-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching the literature, it was found that there have been some studies on the theory of the coordination between dendrimers and metal ions, but there is no report on the use of dendrimers and starch grafting to prepare carriers and the separation of metal ions.

Method used

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  • Method for preparing polyamide amine tree-shaped macromolecule grafted starch-based carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Example 1: Preparation of 1.0th generation polyamidoamine dendrimer grafted starch-based carrier. Add 80g of deionized water and 6.0g of soluble starch into a 250ml three-neck flask, and start the stirrer to stir for 20min. Next, slowly add 6.0ml of epichlorohydrin dropwise, and finally dropwise add 3.0g of 1.0-generation polyamidoamine dendrimers pre-dissolved in 10.0g of anhydrous methanol, and raise the temperature to 30°C, keep the reaction for 2h, After the reaction is completed, the white suspension is filtered, and the filter cake is washed with anhydrous methanol and absolute ethanol for many times to remove unreacted 1.0 generation polyamidoamine dendrimers, then the filter cake is washed with deionized water for many times, and finally in Vacuum-dry at 40°C for 4 hours and then pulverize to obtain a white powdery substance, which is the 1.0th generation polyamidoamine dendrimer grafted starch-based carrier, designated as SP-G1.0.

Embodiment 2

[0016] Example 2: Preparation of 2.0-generation polyamidoamine dendrimer grafted starch-based carrier. Add 100 g of deionized water and 8.0 g of soluble starch into a 250 ml three-neck flask, and start the stirrer to stir for 20 min. Next, slowly add 8.0ml of epichlorohydrin dropwise, and finally dropwise add 4.0g of 2.0-generation polyamidoamine dendrimers pre-dissolved in 10.0g of anhydrous methanol, and raise the temperature to 40°C, and keep the reaction for 3h. After the reaction is completed, the white suspension is filtered, and the filter cake is washed with anhydrous methanol and absolute ethanol for many times to remove unreacted 2.0 generation polyamidoamine dendrimers, then the filter cake is washed with deionized water for many times, and finally in Vacuum drying at 50°C for 5 hours and crushing to obtain a white powdery substance which is the 2.0th generation polyamidoamine dendrimer grafted starch-based carrier, designated as SP-G2.0.

Embodiment 3

[0017] Example 3: Preparation of the 3.0th generation polyamidoamine dendrimer grafted starch-based carrier. Add 120 g of deionized water and 10.0 g of soluble starch into a 250 ml three-necked flask, and start the stirrer to stir for 20 min. Next, 10.0ml of epichlorohydrin was slowly added dropwise, and finally 5.0g of 3.0-generation polyamidoamine dendrimers pre-dissolved in 10.0g of anhydrous methanol were added dropwise, and the temperature was raised to 50°C, and the reaction was kept for 4 hours. After the reaction is completed, the white suspension is filtered, and the filter cake is washed with anhydrous methanol and absolute ethanol for many times to remove unreacted 3.0 generation polyamidoamine dendrimers, then the filter cake is washed with deionized water for many times, and finally in Vacuum drying at 50°C for 7 hours and crushing to obtain a white powdery substance, which is the 3.0th generation polyamidoamine dendrimer grafted starch-based carrier, designated a...

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Abstract

The invention provides a method for preparing a polyamide amine tree-shaped macromolecule grafted starch-based carrier and belongs to the technical field of metal ion absorption material preparation. The method comprises the following steps: taking starch with wide source, cheap cost and renewable performance as raw materials, taking epoxy chloropropane as the cross-linking agent, taking polyamide amine tree-shaped macromolecules as N-containing functional groups and grafting the polyamide amine tree-shaped macromolecules onto the starch through suspension reaction to prepare and obtain the polyamide amine tree-shaped macromolecule grafted starch-based carrier. The method is simple; with the adoption of the prepared starch-based carrier, the number of N-containing functional groups of the scratch is increased, and the prepared starch-based carrier has the characteristic of large absorption capacity to metal ions and can be used for the absorption and recovery utilization of the metal ions.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of metal ion adsorption materials, and in particular relates to a preparation method of a polyamidoamine dendrimer grafted starch-based carrier. Background technique: [0002] Metal smelting and deep processing industries occupy a very important position in the national economy. However, these industries will produce a large amount of wastewater containing metal ions. These wastewater mainly contain heavy metal pollutants such as copper, zinc, nickel, chromium, and cadmium, which are very toxic. hazards. In recent years, there have been many accidents caused by heavy metal pollution in our country, resulting in the death of a large number of fish and crops along the coast, and brought great difficulties to the production and life of local residents. Therefore, the treatment of these metal ion-containing wastewater is a problem that cannot be ignored. Among the many treatment methods for me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/28C02F1/28C02F1/62
Inventor 章昌华王丽丽古绪鹏乔红斌杨建国
Owner ANHUI UNIVERSITY OF TECHNOLOGY