Check patentability & draft patents in minutes with Patsnap Eureka AI!

Microbubble surface function modifier and preparation method thereof

An amphiphilic and chitosan technology, which is applied in flotation water/sewage treatment, etc., can solve the problems of effluent water quality, lack of hydrophilicity, and large pH impact, etc., and achieve good effluent quality, not easy to break, and stability Good results

Active Publication Date: 2021-11-09
SHANDONG JIANZHU UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chitosan has defects such as being greatly affected by pH, poor solubility, and lack of hydrophilic and hydrophobic structures. It adheres to the surface of microbubbles only by electrostatic force, and is easy to desorb under poor hydraulic conditions, which has a great impact on the quality of effluent water. , which limits its application

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
  • Microbubble surface function modifier and preparation method thereof
  • Microbubble surface function modifier and preparation method thereof
  • Microbubble surface function modifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The synthesis of embodiment 1 amphiphilic chitosan

[0037] (1) Weigh 3g of chitosan (deacetylation degree 95%) and dissolve it in 150mL of 2% acetic acid solution, then dropwise add NaOH solution with a concentration of 1mol / L to pH 9, stir at room temperature for 12h for alkalization; Then centrifuge to obtain the precipitate, which is washed with water to neutral to obtain alkalized chitosan;

[0038] (2) Weigh 3g of 2,3-epoxypropyltrimethylammonium chloride and add a small amount of isopropanol to dissolve to obtain a solution of about 20mL;

[0039] (3) Add alkalized chitosan to 100mL isopropanol, stir vigorously at 50°C for 1h to disperse chitosan evenly in isopropanol, slowly raise the temperature to 85°C, and dropwise add 2,3 within 1h - Isopropanol solution of epoxypropyltrimethylammonium chloride, continue to heat and stir for 8 hours, then cool the reaction solution to room temperature, add 150mL of absolute ethanol and centrifuge to obtain a precipitate, wa...

Embodiment 2

[0043] The synthesis of embodiment 2 amphiphilic chitosan

[0044](1) Weigh 3g of chitosan (deacetylation degree 95%) and dissolve it in 150mL of 2% acetic acid solution, then dropwise add NaOH solution with a concentration of 1mol / L to pH 9, stir at room temperature for 10h for alkalization; Then centrifuge to obtain the precipitate, which is washed with water to neutral to obtain alkalized chitosan;

[0045] (2) Weigh 3g of 2,3-epoxypropyltrimethylammonium chloride and add a small amount of isopropanol to dissolve to obtain a solution of about 20mL;

[0046] (3) Add alkalized chitosan to 100mL isopropanol, stir vigorously at 50°C for 1h to disperse chitosan evenly in isopropanol, slowly raise the temperature to 75°C, and drop 2,3 within 1h - Isopropanol solution of epoxypropyltrimethylammonium chloride, continue to heat and stir for 9 hours, then cool the reaction solution to room temperature, add 150mL of absolute ethanol and centrifuge to obtain a precipitate, wash the pr...

Embodiment 3

[0050] The synthesis of embodiment 3 amphiphilic chitosan

[0051] (1) Weigh 3g of chitosan (99% degree of deacetylation) and dissolve it in 150mL of 1% acetic acid solution, then dropwise add NaOH solution with a concentration of 1mol / L to pH 9, stir at room temperature for 8h for alkalization; Then centrifuge to obtain the precipitate, which is washed with water to neutral to obtain alkalized chitosan;

[0052] (2) Weigh 6g of 2,3-epoxypropyltrimethylammonium chloride and add a small amount of isopropanol to dissolve to obtain a solution of about 20mL;

[0053] (3) Add alkalized chitosan to 100mL isopropanol, stir vigorously at 50°C for 1h to disperse chitosan evenly in isopropanol, slowly raise the temperature to 65°C, and drop 2,3 within 1h - Isopropanol solution of epoxypropyltrimethylammonium chloride, continue to heat and stir for 9 hours, then cool the reaction solution to room temperature, add 150mL of absolute ethanol and centrifuge to obtain a precipitate, wash the...

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
diameteraaaaaaaaaa
degree of substitutionaaaaaaaaaa
degree of substitutionaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of sewage treatment, and provides a preparation method of a microbubble surface function modifier. The method comprises the following steps: mixing a hydroxypropyl trimethyl ammonium chloride chitosan aqueous solution and an ethanol solution of n-butyraldehyde or / and 1-caprylaldehyde, carrying out a heating reaction, adding a sodium cyanoborohydride aqueous solution, carrying out a reaction, separating, and purifying to obtain amphiphilic chitosan, namely the microbubble surface function modifier, wherein the quaternary ammonium salt substitution degree of the amphiphilic chitosan is 85-120%, and the alkyl substitution degree is 80-120%. According to the invention, the microbubble surface function modifiercan be applied to sewage treatment, especially microbubble modified air flotation treatment of high-algae-content wastewater; the amphiphilic chitosan disclosed by the invention is simple to prepare, high in substitution degree and good in stability, and has electric neutralization and adsorption effects on electronegative pollutants, so that modified microbubbles are not easy to break; and the microbubble surface function modifier has the characteristics of wide application range, good effluent quality and the like.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a microbubble surface function modifier and a preparation method thereof. Background technique [0002] At present, the problem of water pollution in lakes and reservoirs is becoming more and more serious, among which algae pollution is particularly serious. The eutrophication of the source water of lakes and reservoirs causes algal blooms, resulting in water quality problems such as odor, algae toxins, and disinfection by-products. Because algal cells have the characteristics of small specific gravity, high negative charge, and strong stability, they are difficult to sink in water, and it is difficult to effectively remove them by traditional coagulation and sedimentation processes, which will also lead to filter blockage, shortened backwash cycle, and increased dosage. And so on a series of questions. The traditional dissolved air flotation process (DAF) produces micro...

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): C08B37/08C02F1/24
CPCC08B37/003C02F1/24
Inventor 王永磊孙文韬田立平栗静静于海洋张业静何桂琳刘保森王珊王兴林
Owner SHANDONG JIANZHU 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