Unlock instant, AI-driven research and patent intelligence for your innovation.

Anti-shearing modified polyacrylamide and application thereof

A polyacrylamide and acrylamide technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of insufficient shear resistance and low viscosity maintenance rate, and achieve excellent shear resistance, high viscosity, and improved viscosity. The effect of retention

Active Publication Date: 2022-04-01
XINXIANG BOYUAN WATER PURIFYING MATERIALS CO LTD
View PDF12 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of insufficient shear resistance of polyacrylamide products and low viscosity maintenance rate under high shear, the purpose of the present invention is to provide a shear-resistant modified polyacrylamide, through the polyacrylamide main chain The introduction of hydrophobic side chain units enables polyacrylamide to form a hydrophobic association structure in aqueous solution, and at the same time introduces self-crosslinking units that can form a crosslinked network structure through host-guest supramolecular compatibility with hydrophobic side chain units. Hydrophobic micro-domain strengthening agent is used to strengthen the cross-linked network structure, thus obtaining polyacrylamide products with better shear resistance and higher viscosity

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
  • Anti-shearing modified polyacrylamide and application thereof
  • Anti-shearing modified polyacrylamide and application thereof
  • Anti-shearing modified polyacrylamide and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The hydrophobic side chain monomer used in Example 1 has a chemical structure as shown in formula (2), wherein R 4 is C10 straight chain alkyl, R 5 is hydrogen, the reference "Synthesis and Characterization of 2-Acrylamido Dodecane Sulfonic Acid" (Chemical Times, 1998, 12 (4)) self-made, its NMR spectrum is as follows figure 2 shown.

Embodiment 2

[0044] The hydrophobic side chain monomer used in Example 2 has a chemical structure as shown in formula (3), wherein R 6 For C16 straight chain alkyl, R 7 It is a methyl group, and it is a commercially available alkyl acrylamide.

Embodiment 3

[0045] The hydrophobic side chain monomer used in Example 3 has a chemical structure as shown in formula (4), wherein R 8 For C16 straight chain alkyl, R 9 Methyl was purchased from Jiangsu Fumiao Technology Co., Ltd.

[0046] The self-crosslinking monomer used in Examples 1 and 2 has a chemical structure as shown in formula (1-1). The self-crosslinking monomer used in Example 3 has the chemical structure shown in formula (1-2).

[0047] The monomers represented by formulas (1-1) and (1-2) are all self-synthesized, and the synthesis method refers to "Synthesis and Characterization of β-cyclodextrin Monomers Containing Ethylene Functional Groups" (Food Industry Science and Technology, Vol .39, NO.20, 2018). image 3 and Figure 4 are the NMR spectra of the monomers represented by the formulas (1-1) and (1-2), respectively.

[0048] Other raw materials or reagents used in the examples of the present invention and comparative examples are commercially available products unle...

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 provides anti-shearing modified polyacrylamide and application of the anti-shearing modified polyacrylamide as a flocculating agent. According to the anti-shearing modified polyacrylamide provided by the invention, cyclodextrin in the self-crosslinking monomer and a hydrophobic side chain are utilized to form a supramolecular host-guest compatible structure, and the structure is further strengthened through the hydrophobic microdomain enhancer, so that the obtained polyacrylamide is endowed with the characteristic of recoverable self-crosslinking; the viscosity retention rate of the polyacrylamide solution after shearing is effectively improved, and the viscosity retention of the polyacrylamide solution under various working conditions, especially under a high-shearing working condition, is facilitated. The modified polyacrylamide provided by the invention is excellent in performance, and the preparation method is simple and convenient, does not need high cost, and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of polyacrylamide, in particular to a shear-resistant modified polyacrylamide and its use as a flocculant. Background technique [0002] As one of the important components of water-soluble polymers, acrylamide polymers are widely used in water treatment, mineral processing, oil extraction, formation reconstruction, papermaking, thickening and other fields. The higher viscosity makes the solution have excellent performance in suspension, thickening, drag reduction, flocculation and other working conditions. Among water-soluble polymers, the viscosity-increasing ability of polyacrylamide has great advantages compared with other polymer substances, such as polyethylene glycol, cellulose, chitosan, etc. [0003] However, polyacrylamide polymers also have significant defects, such as poor temperature and salt resistance and insufficient shear resistance. Since polyacrylamide is a flexible segment, the molecular chains ...

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
IPC IPC(8): C08F251/00C08F220/56C08F226/02C08F226/10C08F220/06C08F220/34C08F220/58C02F1/56
Inventor 肖银宝肖博文王引成牛富贵许志军
Owner XINXIANG BOYUAN WATER PURIFYING MATERIALS CO LTD