Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method and application of functionalized polyvinyl alcohol microspheres

A technology of polyvinyl alcohol microspheres and functionalization, which is applied in the direction of microsphere preparation, microcapsule preparation, adsorption water/sewage treatment, etc., can solve the problems of high cost experimental conditions, easy loss of heavy metal samples, etc., and achieve low cost and easy preparation Mild Conditions, Visible Effects

Active Publication Date: 2014-10-01
NANJING HEHAI TECH
View PDF6 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods require high cost and very suitable experimental conditions, and heavy metal samples are extremely easy to lose during storage and transportation, so it is necessary to develop a portable, in-situ method that can even be observed by the naked eye to determine heavy metals in water content

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
  • Preparation method and application of functionalized polyvinyl alcohol microspheres
  • Preparation method and application of functionalized polyvinyl alcohol microspheres
  • Preparation method and application of functionalized polyvinyl alcohol microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A preparation method of functionalized polyvinyl alcohol microspheres, comprising the following steps:

[0046] Preparation of polyvinyl alcohol microspheres by inverse suspension cross-linking method: first dissolve 4g of polyvinyl alcohol (PVA) (1799) in 40mL of water, stir mechanically in a boiling water bath for 1h, remove from the boiling water bath and cool to 60°C, add 80mL of liquid paraffin and 1g Span 80, stirred for 2h and then added 2mL1mol L -1 hydrochloric acid solution and 4mL glutaraldehyde solution at a rotating speed of 500rpm (the radius of the stirring paddle is 2cm), after stirring for 30min, centrifuge at a rotating speed of 4000rpm (the radius of the centrifuge is 13.5cm) for 3min, separate the microspheres, and wash them with petroleum ether for 3 times, and then vacuum-dried to obtain a white powdery solid, that is, polyvinyl alcohol microspheres, with a particle size of 1-50 μm. The reaction principle is as figure 1 shown.

[0047] Take 1g o...

Embodiment 2

[0052] A preparation method of functionalized polyvinyl alcohol microspheres, comprising the following steps:

[0053] Dissolve 4g of polyvinyl alcohol (PVA) (1799) in 40mL of water, stir mechanically in a boiling water bath for 1h, remove from the boiling water bath and cool to 60°C, add 80mL of liquid paraffin and 1g of Span 80, stir for 2h, then add 2mL of 1mol·L -1 hydrochloric acid solution and 4mL glutaraldehyde solution at a rotating speed of 500rpm (the radius of the stirring paddle is 2cm), after stirring for 30min, centrifuge at a rotating speed of 4000rpm (the radius of the centrifuge is 13.5cm) for 3min, separate the microspheres, and wash them with petroleum ether for 3 times, and then vacuum-dried to obtain a white powdery solid, that is, polyvinyl alcohol microspheres, with a particle size of 1-50 μm.

[0054] Take 1g of the above-prepared polyvinyl alcohol microspheres and 4mL epichlorohydrin, add it to 50mL hydrochloric acid with a pH of 2, heat it in a water ...

Embodiment 3

[0059] A preparation method of functionalized polyvinyl alcohol microspheres, comprising the following steps:

[0060] Dissolve 4g of polyvinyl alcohol (PVA) (1799) in 40mL of water, stir mechanically in a boiling water bath for 1h, remove from the boiling water bath and cool to 60°C, add 80mL of liquid paraffin and 1g of Span 80, stir for 2h, then add 2mL of 1mol·L -1 hydrochloric acid solution and 4mL glutaraldehyde solution at a rotating speed of 500rpm (the radius of the stirring paddle is 2cm), after stirring for 30min, centrifuge at a rotating speed of 4000rpm (the radius of the centrifuge is 13.5cm) for 3min, separate the microspheres, and wash them with petroleum ether for 3 times, and then vacuum-dried to obtain a white powdery solid, that is, polyvinyl alcohol microspheres, with a particle size of 1-50 μm.

[0061] Take 1g of the above-prepared polyvinyl alcohol microspheres and 10mL of epichlorohydrin, add it to 100mL of hydrochloric acid with a pH of 5, heat it in ...

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
Login to View More

Abstract

The invention discloses a preparation method and application of functionalized polyvinyl alcohol microspheres. The preparation method comprises the following steps: uniformly mixing polyvinyl alcohol microspheres, epoxy chloropropane and a hydrochloric acid solution, carrying out a stirring reaction for 1-5 hours in a water bath, and carrying out centrifuging, water cleaning and drying for later use after the reaction; uniformly mixing the obtained chloridized polyvinyl alcohol microspheres, tetrabutylammonium bromide, ethidene diamine and a sodium hydroxide solution, carrying out the stirring reaction for 4-10 hours in the water bath, and carrying out the centrifuging, ethanol cleaning and the drying for later use after the reaction; and uniformly mixing the obtained aminated polyvinyl alcohol microspheres with 2-(2-pyridine) azo-resorcinol, formaldehyde and distilled water, stirring for 6-18 hours in the presence of nitrogen, and carrying out the centrifuging, the ethanol cleaning and the drying after the reaction, so as to obtain an end product. The functionalized polyvinyl alcohol microspheres provided by the invention can be used for chelating heavy metal and detecting and processing divalent heavy metal ions in wastewater and have the characteristics of simple preparation condition, low cost, short detection response time and high adsorption capacity.

Description

technical field [0001] The invention belongs to the field of wastewater detection and treatment, and in particular relates to a preparation method of functionalized polyvinyl alcohol microspheres and its application in the detection and adsorption treatment of heavy metal polluted wastewater. Background technique [0002] Heavy metals are very toxic, and excessive heavy metals in water are very dangerous to the natural environment and human health. Therefore, how to quickly and efficiently detect and treat heavy metals in water is a research hotspot at this stage. In recent years, many methods for detecting heavy metals have been developed, such as ultraviolet-visible spectroscopy, atomic absorption spectroscopy, differential pulse cathodic voltammetry, and inductively coupled atomic spectroscopy, etc. These methods can quickly and accurately determine the concentration of heavy metals in samples. The content of heavy metals, and the determination range is large. However, ...

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): B01J13/02C02F1/28C08F8/18C08F8/32C08F16/06
Inventor 白雪华祖林杨梖顾海鑫张晓媛黄欣戴章燕马文强
Owner NANJING HEHAI TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com