Adamantyl contained hydrophobic association zwitter-ion starch and preparation method thereof

A technology of adamantyl and zwitterions, applied in the field of functional polymers

Inactive Publication Date: 2014-10-15
SOUTHWEST PETROLEUM UNIV
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the relevant properties and processes of hydrophobically associated starches as oilfield additives have been further improved and improved, but there are few reports on the preparation of hydrophobically associated zwitterionic starches using adamantyl groups as hydrophobic groups

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
  • Adamantyl contained hydrophobic association zwitter-ion starch and preparation method thereof
  • Adamantyl contained hydrophobic association zwitter-ion starch and preparation method thereof
  • Adamantyl contained hydrophobic association zwitter-ion starch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add 60g of acrylamide, 30g of sodium acrylate and 15g of dimethyl diallyl ammonium chloride into the reactor, stir evenly, adjust the pH value of the system to 7.5 with a NaOH solution with a concentration of 5.0% by mass, Add 300 mL of distilled water.

[0043] Add 20.0g sodium dodecylsulfonate in the reactor, add 1.5g (NH 4 ) 2 S 2 o 8and 0.5g NaHSO 3 , and reacted at a temperature of 50°C for 12.0 hours to obtain a colorless and transparent gum-like crude product.

[0044] Add 1000mL of absolute ethanol to precipitate and filter, wash the product three times with absolute ethanol and acetone successively, and then use the glacial acetic acid-ethylene glycol mixed solvent with a volume ratio of 3:2 as the extraction agent to extract the product with Soxhlet Extracted for 24 hours, vacuum-dried to constant weight at 25°C to obtain hydrophobically associated amphoteric ion starch, its relative molecular mass is 15860000, and its molecular structure is as follows: ...

Embodiment 2

[0049] Add 40g of acrylamide, 20g of sodium acrylate and 10g of dimethyl diallyl ammonium chloride into the reactor, stir evenly, and adjust the pH value of the system to 8.0 with a NaOH solution with a concentration of 5.0% by mass. Supplement with 388 mL of distilled water.

[0050] Add 30.0g sodium octadecylbenzenesulfonate to the reactor, stir well and add 2.0g K 2 S 2 o 8 and 0.75g NaHSO 3 , reacted at a temperature of 45° C. for 10.0 hours to obtain a colorless and transparent gum-like crude product.

[0051] Add 1000mL of absolute ethanol to precipitate and filter, wash the product three times with absolute ethanol and acetone successively, and then use the glacial acetic acid-ethylene glycol mixed solvent with a volume ratio of 3:2 as the extraction agent to extract the product with Soxhlet After extracting for 24 hours, vacuum drying at 25°C to constant weight, the hydrophobically associated zwitterionic starch was obtained, with a relative molecular mass of 16070...

Embodiment 3

[0056] From the above results, it can be seen that compared with partially hydrolyzed polyacrylamide, the apparent viscosity of the hydrophobically associated zwitterionic starch obtained in Examples 1 and 2 increases sharply when the mass percentage concentration is greater than 0.125%, while partially hydrolyzed polyacrylamide The apparent viscosity increase rate of acrylamide is relatively slow, indicating that hydrophobic associations have occurred between the hydrophobically associated zwitterionic starch molecules obtained in Examples 1 and 2 to form a physical cross-linked network structure, making the apparent viscosity of the solution rapidly increased.

[0057] Example 4

[0058] Effect of Temperature on Apparent Viscosity of Hydrophobically Associated Zwitterionic Starches

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 relates to adamantyl contained hydrophobic association zwitter-ion starch and a preparation method thereof. The zwitter-ion starch is prepared from raw materials of starch, adamantyl hydrophobic monomer, alkenyl amide, alkenyl carboxylate and alkenyl quaternary ammonium salt. According to the invention, the adamantyl hydrophobic monomer is introduced to polymer molecules, so that the modified starch has a hydrophobic association property and the viscosity increasing capacity of the starch is increased. As an anion group and a cation group are introduced in the starch molecule chain simultaneously, the anti-polyelectrolyte effect of the solution is enhanced and the salt resistance is improved.

Description

technical field [0001] The invention belongs to the field of functional polymers, in particular to a hydrophobic association zwitterionic starch containing adamantyl groups and a preparation method thereof. Background technique [0002] As a natural polymer compound, starch has the advantages of wide sources, low cost, non-toxic, harmless, biodegradable and recyclable, and meets the requirements of modern human beings for environmental protection. Starch molecules contain a large number of hydroxyl groups, which have high reactivity, and can undergo reactions such as grafting, esterification, etherification, oxidation, and crosslinking, so that different types of modified starches with various properties and special functions can be prepared according to actual needs. starch products. In the field of oil and gas development, modified starches have been widely used as drilling fluid fluid loss control agents, flocculants, water plugging and profile control agents, demulsifie...

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): C08F251/00C08F220/18C08F220/56C08F220/06C08F226/02C08F220/34
Inventor 苏俊霖蒲晓林罗霄李之军周素林
Owner SOUTHWEST PETROLEUM UNIV
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