A kind of method and application of chelating functionalized magnetic polyvinyl alcohol microspheres

A polyvinyl alcohol microsphere and functionalization technology, which is applied in the direction of magnetism of organic materials/organic magnetic materials, preparation of microspheres, preparation of microcapsules, etc., to achieve rapid separation and recovery, obvious effect and mild conditions.

Active Publication Date: 2016-08-17
NANJING HEHAI TECH
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorption materials mainly use physical and chemical effects such as Van der Waals force, chelation, ion exchange, etc. to adsorb and exchange heavy metal ions by chelation, which has the advantages of simple operation and diverse selectivity. However, repeated recycling of adsorption materials has become a difficult point

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
  • A kind of method and application of chelating functionalized magnetic polyvinyl alcohol microspheres
  • A kind of method and application of chelating functionalized magnetic polyvinyl alcohol microspheres
  • A kind of method and application of chelating functionalized magnetic polyvinyl alcohol microspheres

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The preparation method of ferroferric oxide magnetic particles is chemical co-precipitation method (see: Lu, A.-H.; Salabas, E. L.; Schüth, F., Magnetic Nanoparticles: Synthesis, Protection, Functionalization, and Application. Angewandte Chemie International Edition 2007,46 (8), 1222-1244.);

[0039] Mix ferrous sulfate heptahydrate and ferric chloride hexahydrate into a three-necked flask, add ammonia water into a dropping funnel under nitrogen at constant temperature in a water bath, adjust the pH to alkaline, stir vigorously, wash repeatedly with distilled water, vacuum dry, and grind.

[0040] The preparation method of the magnetic polyvinyl alcohol microspheres is a reverse-phase suspension cross-linking method, and the particle size of the obtained magnetic polyvinyl alcohol microspheres is 5-50 μm (see: Shi Hanchang; Bai Xue; Wang Qing; Li Bing. Immobilized Laccase Microsphere carrier and its preparation method and application. Invention patent application num...

Embodiment 1

[0041] Embodiment 1, a kind of functionalization of magnetic polyvinyl alcohol microspheres

[0042] Dissolve 4g of polyvinyl alcohol (PVA) (1799) and 0.4g of ferroferric oxide magnetic particles in 40mL of water, stir mechanically in a boiling water bath for 1 hour, remove from the boiling water bath, wait for the reaction to cool to 60°C, add 80mL of liquid paraffin , stirred for 2h to form microspheres, then added 2mL of 1mol·L -1 hydrochloric acid solution and 4mL glutaraldehyde solution at a rotation speed of 500rpm (the radius of the stirring paddle is 2cm), after stirring for 30min, centrifuge at a rotation speed of 4000rpm (the radius of the centrifuge is 13.5cm) for 3min to separate the microspheres and wash them with petroleum ether for 3 times, and then vacuum-dried for 48 hours to obtain a brown powdery solid, that is, magnetic polyvinyl alcohol microspheres, with a particle size of 5-50 μm.

[0043] Take 2g of the above-prepared magnetic polyvinyl alcohol microsp...

Embodiment 2

[0047] Embodiment 2, a kind of functionalization of magnetic polyvinyl alcohol microspheres

[0048] Take 2g of the magnetic polyvinyl alcohol microspheres prepared in Example 1 and 20mL of epichlorohydrin, and add them to 200mL of hydrochloric acid at pH=5. After stirring for 5 hours in a water bath at 100° C. at a rotational speed of 2000 rpm, it was washed with distilled water for 3 times, and then vacuum-dried for 48 hours to obtain chlorinated magnetic polyethylene microspheres.

[0049] Then take 1 g of the chlorinated magnetic polyethylene microsphere solid powder obtained above and put it in 50 mL 1,4-dioxane to expand for 5 h, pour it into a three-necked flask, and then add 5 g of sodium hydroxide, 0.5 g of tetrabutyl bromide ammonium chloride, quickly pour 50mL of ethylenediamine. Heat it in a water bath to 100°C, keep stirring at 2000rmp for 10h, filter with distilled water, wash with petroleum ether three times, and dry in vacuum for 48h to obtain aminated magneti...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for chelating and functionalizing magnetic polyvinyl alcohol microspheres and application of the method. The method comprises the following steps: firstly carrying out chlorination on the magnetic polyvinyl alcohol microspheres to enable hydroxyl terminals of the polyvinyl alcohol microspheres to be connected with chlorine groups, then replacing the chlorine groups by using amino groups, then carrying out carboxylation to form final chelating groups and enable the final chelating groups to have the capability of chelating heavy metal so as to obtain the magnetic polyvinyl alcohol microspheres with the absorbing and chelating functions. The method provided by the invention has the advantages that the preparation condition is mild, the cost is low, the obtained chelated and functionalized magnetic polyvinyl alcohol microspheres can be used for treating heavy-metal ions in waste water, the absorbing capacity is large, the separation of the heavy-metal ions from water can be quick and the recovery utilization rate is high.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a method for chelating functionalized magnetic polyvinyl alcohol microspheres and its application in the adsorption treatment of heavy metal polluted wastewater. Background technique [0002] In recent years, heavy metal pollution of various types of water has become increasingly serious, which not only endangers the ecological environment of water bodies, but also threatens human health. Seeking efficient and safe treatment methods is a hot spot in the research of heavy metal wastewater treatment. In recent years, many methods for the treatment of heavy metal pollutants have been developed, such as chemical precipitation method, redox method, air flotation method, etc., but these methods have disadvantages such as high cost and complicated operation. As a new popular method, adsorption method has received extensive attention. The adsorption method uses solid materials to adso...

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 Patents(China)
IPC IPC(8): B01J13/14C02F1/28H01F1/42H01F41/02
Inventor 白雪华祖林杨梖顾海鑫禹露
Owner NANJING HEHAI TECH
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