Supercharge Your Innovation With Domain-Expert AI Agents!

A modified starch/quartz sand composite microsphere and its preparation method and application

A technology of composite microspheres and quartz sand, applied in chemical instruments and methods, sterilization/microdynamic water/sewage treatment, and other chemical processes, can solve the problems of difficult and difficult separation of starch, and achieve sewage treatment capacity Improvement, low price, and cost reduction effect

Active Publication Date: 2020-07-24
NANJING UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the size of the modified starch particles is very small, and it is difficult to quickly separate the pollutants from the water after adsorption and removal of the pollutants in the water. Therefore, in order to further improve the water treatment performance of the starch, the present invention ensures its biocompatibility Under the premise of high stability, graft or compound a large number of other active functional groups onto the starch chain, and at the same time find a simple, quick, and cheap separation method to overcome the disadvantage that starch is not easy to quickly separate from the water body, and prepare an efficient water treatment with good separation effect agent, and also has the function of adsorbing soluble organic substances, refractory biodegradable compounds and harmful microorganisms in sewage

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 modified starch/quartz sand composite microsphere and its preparation method and application
  • A modified starch/quartz sand composite microsphere and its preparation method and application
  • A modified starch/quartz sand composite microsphere and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of modified starch

[0038] Disperse the starch in 5% aqueous sodium hydroxide solution, the ratio of starch to aqueous sodium hydroxide solution is 1:4, alkalinize at 70°C for 1 h; after that, add 3-chloro-2-hydroxypropyl dimethyl benzyl ammonium chloride, the mass ratio of 3-chloro-2-hydroxypropyl dimethyl benzyl ammonium chloride to starch is 1:1, react at 70°C for 2h; , to obtain modified starch, through nuclear magnetic analysis, cationic quaternary ammonium salt group substitution degree is 42% (mass);

[0039] (2) Preparation of modified starch / quartz sand composite microspheres

[0040] The modified starch prepared in step (1) is dissolved in water, and the mass percentage concentration of the modified starch is prepared as a solution of 1%. After the solution is uniform, the quartz sand material is dispersed in the modified starch solution by ultrasonic, The quartz sand material accounts for 10% of the total weight of the modified starch. Add ...

Embodiment 2

[0045] (1) Preparation of modified starch

[0046] Disperse the starch in 1% sodium hydroxide aqueous solution, the ratio of starch to sodium hydroxide aqueous solution is 1:2, alkalinize at 70°C for 2 hours; after that, add 3-chloro-2-hydroxypropyl trimethyl chloride Ammonium, 3-chloro-2-hydroxypropyltrimethylammonium chloride and starch mass ratio 0.1:1, reacted at 80°C for 4 hours; after the reaction was completed, ethanol was used as a precipitating agent, and the modified starch was obtained by precipitation and separation. Analyzing with nuclear magnetic method, cationic quaternary ammonium salt group substitution degree is 6% (mass);

[0047] (2) Preparation of modified starch / quartz sand composite microspheres

[0048] The modified starch prepared in step (1) is dissolved in water, and the mass percentage concentration of the modified starch is prepared as a solution of 1%. After the solution is uniform, the quartz sand material is dispersed in the modified starch sol...

Embodiment 3

[0050] (1) Preparation of modified starch

[0051] Disperse the starch in 30% aqueous sodium hydroxide solution, the ratio of starch to aqueous sodium hydroxide solution is 1:5, alkalinize at 70°C for 0.5h; after that, add 3-chloro-2-hydroxypropyldimethylbenzene Methyl ammonium chloride, 3-chloro-2-hydroxypropyl dimethyl benzyl ammonium chloride and starch mass ratio 3:1, react at 50°C for 4 hours; , to obtain modified starch, through nuclear magnetic analysis, cationic quaternary ammonium salt group substitution degree is 61% (mass);

[0052] (2) Preparation of modified starch / quartz sand composite microspheres

[0053] The modified starch prepared in step (1) is dissolved in water, and the mass percentage concentration of the modified starch is prepared as a solution of 1%. After the solution is uniform, the quartz sand material is dispersed in the modified starch solution by ultrasonic, The quartz sand material accounts for 20% of the total weight of the modified starch. ...

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a modified starch / quartz sand compound microsphere as well as a preparation method and application thereof. The compound microsphere is of a core-shell structure, wherein modified starch is used as a shell; a quartz sand material is used as a core; the modified starch is prepared by etherifying starch and a quaternary ammonium salt modifier. The preparation method of the modified starch / quartz sand compound microsphere comprises the following steps: mixing and dispersing the modified starch and the quartz sand material in a water solution, then taking cyclohexane as anoil phase and crosslinking through epoxy chloropropane. The compound microsphere prepared by the modified starch and the quartz sand is capable of effectively removing harmful materials in water through effects of adsorption, complexation and the like, and inhibiting the growth of bacteria; the compound microsphere is effectively separated from the water through the action of self weight, can be recycled and reused, and can be widely used; the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and relates to a novel composite material and its application in the field of water environment treatment, in particular to a modified starch / quartz sand composite microsphere and its preparation method and application. Background technique [0002] In recent years, with rapid economic development and rapid industrial development, water pollution has become increasingly serious; water is a basic need for human survival. At the same time, the continuous improvement of people's material living standards has also put forward higher requirements for water quality. As far as the current water pollution characteristics are concerned, soluble organic substances, refractory biodegradable compounds, and harmful microorganisms in water are increasing year by year, but the current conventional water treatment methods are not effective in removing this type of pollutants. It may also produce sec...

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): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/50C02F101/20C02F101/30
CPCB01J20/24B01J20/28021B01J2220/4825C02F1/285C02F1/50C02F2101/20C02F2101/308C02F2303/04
Inventor 杨琥李佩高博强李爱民
Owner NANJING UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com