Hyperbranched polyamide-grafted chitosan adsorbent and its preparation method and use

A technology of hyperbranched polyamide and hyperbranched polymer, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc. , good reproducibility, good stability effect

Inactive Publication Date: 2016-09-28
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the use of amino-terminated hyperbranched polyamides on chitosan as adsorbents for solid phase extraction.

Method used

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  • Hyperbranched polyamide-grafted chitosan adsorbent and its preparation method and use
  • Hyperbranched polyamide-grafted chitosan adsorbent and its preparation method and use
  • Hyperbranched polyamide-grafted chitosan adsorbent and its preparation method and use

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Embodiment 1

[0019] Preparation of hyperbranched polyamide grafted chitosan adsorbent

[0020] (1) Synthesis of amino-terminated hyperbranched polymers: First, 52 mL of diethylenetriamine was added to a 250 mL three-necked flask, and then a mixed solution of 43 mL of methyl acrylate and 100 mL of methanol was slowly added dropwise with a constant pressure funnel (drop cooling with an ice-water bath during the addition), after all the addition, react at room temperature for 4 h under the condition of nitrogen protection to obtain a light yellow transparent liquid; then use a rotary evaporator to remove the methanol under reduced pressure, and then continue to heat up under reduced pressure to 150°C, reacted for 4 h, and finally obtained a light yellow viscous product, that is, the amino-terminated hyperbranched polymer PAMAM;

[0021] (2) Synthesis of amino-terminated hyperbranched polyamide-modified chitosan: Add 2 g of chitosan into a 250 mL three-neck flask filled with 100 mL of distille...

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Abstract

The invention discloses a hyperbranched polyamide-grafted chitosan adsorbent and its preparation method and use and belongs to the field of adsorption material preparation. The preparation method comprises 1, amino-terminated hyperbranched polymer synthesis and 2, amino-terminated hyperbranched polyamide-modified chitosan synthesis. Under cross-linking action of glutaraldehyde as a cross-linking agent, amino-terminated hyperbranched polyamide is carried by chitosan as a carrier so that the solid phase extraction material is obtained. Through introduction of a lot of nitrogen-containing groups to chitosan, active group content is improved, adsorbent adsorption performances are improved, bonding strength is improved, properties are stable, reappearance is good and enrichment multiple is large. The hyperbranched polyamide-grafted chitosan adsorbent can be used for adsorption of heavy metal copper ions and dye in an environment sample.

Description

technical field [0001] The invention belongs to the field of adsorption material preparation technology, and in particular relates to a hyperbranched polyamide grafted chitosan adsorbent and its preparation and application. Background technique [0002] The random discharge of industrial wastewater is a major culprit of water pollution, and a large amount of toxic heavy metals and dyes contained in it will cause serious damage to organisms. Strictly controlling the discharge of industrial, urban and agricultural sewage, and adopting effective technologies to treat polluted water bodies have become environmental problems faced by all human beings. As a sewage treatment method, the adsorption method has been widely used due to its advantages of low cost, high efficiency, simple operation, short time consumption, and the ability to complement each other with other sewage treatment technologies. However, relatively little research has been done on sorbents for non-degradable po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J2220/4812C02F1/286C02F2101/20C02F2103/30
Inventor 吕海霞凌云霞飞于岩
Owner FUZHOU UNIV
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