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

A kind of lignin/inorganic oxide pickering emulsion with double pH responsiveness and preparation method thereof

A technology of inorganic oxide and lignin, which is applied in the field of lignin/inorganic oxide pickering emulsion and its preparation, can solve problems such as limiting application range, increasing application cost, equipment corrosion, etc., and achieves cost reduction, corrosion reduction, and salt reduction the cumulative effect of

Active Publication Date: 2019-04-09
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, a large amount of acid or alkali needs to be added, which increases the application cost on the one hand, and on the other hand, excessive acid or alkali easily causes corrosion of equipment
And the pickering prepared by this method can only be stable under acidic conditions, and demulsifies under alkaline conditions, which greatly limits its application range

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 lignin/inorganic oxide pickering emulsion with double pH responsiveness and preparation method thereof
  • A kind of lignin/inorganic oxide pickering emulsion with double pH responsiveness and preparation method thereof
  • A kind of lignin/inorganic oxide pickering emulsion with double pH responsiveness and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take 100 parts by weight of pine alkali lignin solid and dissolve it in water, prepare a suspension with a concentration of 20% by weight, adjust the pH value to 9 with NaOH with a mass concentration of 20%, heat to 50°C, and add 5 parts by weight of bromine Acetic acid was reacted at 50° C. for 1 h, then 50 parts by weight of 3-chloro-2-hydroxypropyltrimethylammonium chloride was added, reacted at 50° C. for 4 h, and amphoteric lignin was obtained after drying.

[0041] Take the above-mentioned amphoteric lignin, add water to dissolve it, configure a solution with a weight percentage of 5%, and then add HCl with a mass concentration of 20% to adjust the pH to about 6.5. Then add 0.1 parts by weight of titanium dioxide, ultrasonically disperse to obtain a mixed solution of lignin / titanium dioxide, then add 400 parts by weight of n-decane, and emulsify at 11000 rpm for 5 minutes to obtain a lignin / titanium dioxide pickering emulsion.

Embodiment 2

[0043] Take 50 parts by weight of bamboo pulp alkali lignin and 50 parts by weight of reed alkali lignin solid and dissolve them in water, prepare a suspension with a concentration of 30% by weight, adjust the pH value to 10 with NaOH with a mass concentration of 20%, and heat to 60°C, add 10 parts by weight of sodium chloroacetate, and react at 60°C for 3 hours. Then add 40 parts by weight of 2,3-epoxypropyltrimethylammonium chloride, react at 60° C. for 3 hours, and obtain amphoteric lignin after drying.

[0044] The above-mentioned amphoteric lignin was taken, dissolved in water, and a solution with a weight percentage of 1% was prepared, and then HCl with a mass concentration of 20% was added to adjust the pH to 7. Then add 10 parts by weight of silicon dioxide, ultrasonically disperse to obtain a mixed solution of lignin / silicon dioxide, then add 200 parts by weight of toluene, and emulsify at 16000 rpm for 3 minutes to obtain a lignin / silicon dioxide pickering emulsion. ...

Embodiment 3

[0046] Dissolve 100 parts by weight of wheatgrass lignin solid in water, prepare a suspension with a concentration of 40% by weight, adjust the pH value to 11 with NaOH with a mass concentration of 20%, heat to 70°C, and add 15 parts by weight of Chloroacetic acid, reacted at 70°C for 2h, then added 10 parts by weight of 3-chloro-2-hydroxypropyltrimethylammonium chloride and 10 parts by weight of 2,3-epoxypropyltrimethylammonium chloride, React at 70°C for 2 hours, and obtain amphoteric lignin after drying.

[0047] The above-mentioned amphoteric lignin was taken, dissolved in water, and a solution with a weight percentage of 2% was prepared, and then HCl with a mass concentration of 20% was added to adjust the pH to 6. Then add 20 parts by weight of zinc oxide, ultrasonically disperse to obtain a lignin / zinc oxide mixed solution, then add 150 parts by weight of dichloromethane, and emulsify at 20000 rpm for 2 minutes to obtain a lignin / zinc oxide pickering emulsion.

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of preparation of emulsion and discloses lignin / inorganic oxide pickering emulsion with dual pH responsiveness and a preparation method of the emulsion. The method disclosed by the invention comprises the following steps: reacting alkali lignin and a carboxylated reagent, and introducing an anionic functional group; reacting with a cationized reagent, and introducing a cationic functional group so as to obtain amphoteric lignin; regulating the system to be positively charged, adding inorganic oxides, and ultrasonically dispersing so as to obtain a mixed solution of lignin / inorganic oxides; and adding an oil phase, emulsifying, thereby obtaining the lignin / inorganic oxide pickering emulsion. The lignin / inorganic oxide pickering emulsion prepared by the method disclosed by the invention has pH responsive characteristics and is stable under the neutrallty condition. During demulsification under weakly acidic or weakly alkaline conditions, emulsification or demulsification of the emulsion can be simply controlled by regulating the pH value, the emulsification or demulsification aim can be achieved by adding a small amount of acid or alkali only, and corrosive property and accumulation of salt are reduced.

Description

technical field [0001] The invention belongs to the technical field of emulsion preparation, in particular to a lignin / inorganic oxide pickering emulsion with dual pH responsiveness and a preparation method thereof. Background technique [0002] Emulsions play an important role in many industrial processes and commercial products. Traditional emulsions are generally stabilized by adding small molecule surfactants or amphiphilic polymers. However, surfactants are often costly and difficult to recycle. Pickering emulsions stabilized by surface-active particles have more advantages than ordinary emulsions. For example, Pickering emulsions have better stability and in many cases have good biocompatibility and environmental friendliness. These characteristics make pickering emulsions widely used in the fields of petroleum, food, biomedicine, pharmaceuticals and cosmetics. In pickering emulsion applications, asphalt emulsification or food storage requires that the emulsion rem...

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): C08L97/00C08K3/22C08K3/36C08J3/03C08H7/00
CPCC08H6/00C08J3/03C08J2397/00C08K3/22C08K3/36C08K2003/2241C08K2003/2296C08L97/005
Inventor 杨东杰李圆圆邱学青楼宏铭钱勇庞煜霞劳苏琳
Owner SOUTH CHINA UNIV OF 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