Unlock instant, AI-driven research and patent intelligence for your innovation.
A kind of spherical polyacrylamide with large particle size and its preparation method and application
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of polyacrylamide and acrylamide, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve the problems of reducing system stability and poor monodispersity of microspheres
Active Publication Date: 2022-01-04
LANZHOU UNIVERSITY OF TECHNOLOGY
View PDF12 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
These two polymerization methods are relatively mature in theory, but due to the use of a large amount of emulsifiers and surfactants, it is easy to introduce impurities into the reaction system and reduce the stability of the system. The particle size of the obtained polyacrylamide microspheres is small, mostly nanometer grade and micron grade, and the obtained microspheres have poor monodispersity
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0031] The present invention also provides a method for preparing the large-diameter spherical polyacrylamide described in the above technical solution, comprising the following steps:
[0032] Mix acrylamide, initiator and water to obtain a prepolymer solution;
[0033] Adding the pre-polymerization liquid dropwise into silicone oil for polymerization to obtain the large-diameter spherical polyacrylamide;
[0034] In the present invention, unless otherwise specified, the raw materials used in the present invention are preferably commercially available products.
[0035] The present invention mixes acrylamide, initiator and water to obtain prepolymer liquid.
[0036] In the present invention, the water is preferably distilled water. In the present invention, the initiator is preferably a persulfate; the persulfate preferably includes one or more of potassium persulfate, sodium persulfate and ammonium persulfate, more preferably potassium persulfate. In the present invention...
Embodiment 1
[0050] Add 5g of acrylamide (AM) into a 50mL beaker, add 10g of distilled water, then add 0.005g of potassium persulfate into the beaker, and stir evenly to obtain a prepolymer solution.
[0051]Turn on the constant temperature water bath, heat up a 250mL beaker with 100mL of silicone oil to 90°C, and after the temperature of the silicone oil is constant, drop the pre-polymerization solution drop by drop with a dropper (2mm in diameter) (the drop rate is 0.05mL / second) in silicone oil, pay attention to the absence of air bubbles when the dropper is sucked; take out after the droplets are polymerized and kept warm for 4 minutes, wash the polymer twice with isoamyl alcohol, and then wash twice with petroleum ether; dry at 80°C to constant weight , to obtain spherical polyacrylamide, and the particle diameter of the obtained spherical polyacrylamide is 2 mm to 4 mm.
Embodiment 2
[0053] Similar to Example 1, the only difference is that the mass of distilled water is 7.5g, and the particle diameter of the obtained spherical polyacrylamide is 2mm-4mm.
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
Property
Measurement
Unit
particle diameter
aaaaa
aaaaa
diameter
aaaaa
aaaaa
Login to View More
Abstract
The invention belongs to the technical field of polymer preparation and provides a spherical polyacrylamide with a large particle size and a preparation method and application thereof. The spherical polyacrylamide with large particle size provided by the present invention has a particle size of 2 mm to 4 mm and a sphericity of 0.75 to 0.85; when the above spherical polyacrylamide with large particle size is used as a temporary plugging agent, it can block pores at the millimeter level. In the present invention, acrylamide is used as a monomer, and water and an initiator are added to form a pre-polymerized liquid; the pre-polymerized liquid, under the action of the initiator, adopts a dripping method, by means of a water-in-oil (W / O) emulsion template, to The droplet is a micro-reaction container, and the droplet is solidified by free radical polymerization, thereby producing spherical polyacrylamide. In the present invention, the mass ratio of acrylamide to water is controlled to be 1:2-4:3, which ensures the excellent sphericity of polyacrylamide; at the same time, the diameter of the droplet of the pre-polymerized liquid obtained by dripping is controlled to be 2mm-4mm, It is guaranteed to obtain spherical polyacrylamide with large particle size at the millimeter level.
Description
technical field [0001] The invention relates to the technical field of polymer preparation, in particular to a spherical polyacrylamide with a large particle size and a preparation method and application thereof. Background technique [0002] Polyacrylamide (PAM) is a general term for acrylamide homopolymers and copolymers, mainly including nonionic polyacrylamide (NPAM), cationic polyacrylamide (CPAM), anionic polyacrylamide (APAM), amphoteric polypropylene Amide (AmPAM) 4 classes. Because polyacrylamide contains a large number of amide groups in its structure, it is easy to form hydrogen bonds, so it has good stability and flocculation. It is widely used in sewage treatment, oil exploration, paper industry and other industries. [0003] At this stage, the consumption demand for polyacrylamide in various industries in my country is increasing day by day, and there are different requirements for its particle size and shape. The early methods for preparing functional polyac...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More