Production method of crosslinked chitosan microsphere heavy metal ion adsorbent

A technology of cross-linking chitosan and heavy metal ions, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of lower adsorption capacity and limit the application of chitosan, and achieve large adsorption capacity, obvious economic benefits and environmental protection. Benefits, effects of good biocompatibility

Inactive Publication Date: 2012-08-01
ZHEJIANG GONGSHANG UNIVERSITY
View PDF2 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on the other hand, since the cross-linking reaction occurs on the active functional groups of chitosan, this reduces the adsorption capacity of chitosan microspheres to metal ions, which limits the application of chitosan.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method of crosslinked chitosan microsphere heavy metal ion adsorbent
  • Production method of crosslinked chitosan microsphere heavy metal ion adsorbent
  • Production method of crosslinked chitosan microsphere heavy metal ion adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1, a kind of production method of cross-linked chitosan microsphere heavy metal ion adsorbent, carries out following steps successively:

[0055] One, prepare cross-linked chitosan microspheres and carry out the following steps successively:

[0056] ①. At room temperature, add 12.5ml of acetic acid solution with a mass concentration of 4% to 0.5g of powdered chitosan. After the chitosan is fully dissolved, add 55ml of liquid paraffin. Stir for 10 minutes;

[0057] ②. Heat up the product obtained in step ① to 55°C, continue to stir at a speed of 350r / min for 10 minutes, then add 0.1ml (2 drops) of the emulsifier span-80 dropwise, and keep warm and emulsify for 10 minutes at the same speed; Under the action of emulsifier, tiny chitosan droplets will be formed;

[0058] ③. Warm up the product obtained in step ② to 60°C, add 1.5ml of formaldehyde and stir (at a speed of 350r / min) to react for 1.5 hours; the obtained product is transparent;

[0059] 4., in ste...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a production method of a crosslinked chitosan microsphere heavy metal ion adsorbent. The method comprises the following steps of: (1) protecting amino on chitosan C2 with formaldehyde by taking chitosan as a material and taking liquid paraffin as an organic dispersion medium, and preparing a crosslinked chitosan microsphere with a reversed phase suspension crosslinking method; and (2) chemically grafting the crosslinked chitosan microspheres by taking the crosslinked chitosan microsphere as a parent body and taking ethylene diamine as a ligand to obtain the crosslinked chitosan microsphere heavy metal ion adsorbent. The crosslinked chitosan microsphere heavy metal ion adsorbent produced with the method has high selective adsorption on Cu<2+> ions.

Description

technical field [0001] The invention relates to a production method of a novel cross-linked chitosan microsphere heavy metal ion adsorbent, in particular to a modified chitosan material which can selectively adsorb heavy metal ions in food, has good adsorption performance and can be reused and its method of production. Background technique [0002] With the acceleration of modern industrialization and the blind pursuit of profits by some unscrupulous businessmen, the problem of heavy metal pollution in food has become more and more prominent, and has become a major problem that endangers human health. Among the many methods for separating and enriching harmful heavy metal ions, adsorption is a more effective and widely used method. Compared with other adsorbent materials, activated carbon and commercial ion exchange resins have become more popular and widely used. However, activated carbon and commercial ion exchange resin materials are expensive and costly. Therefore, lo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
Inventor 熊春华盛齐乐姚彩萍
Owner ZHEJIANG GONGSHANG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap