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A technology of polyacrylamide and acrylamide, applied in the field of synthesis of water-soluble polymer materials
Active Publication Date: 2014-02-05
东北大学秦皇岛分校
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[0004]Recently, we have found that SiO2 nanoparticles have the property of initiating acrylamide under low-pressure heating conditions. The characteristic of the agent is that the product structure is unique, the reaction is stable, not easy to violently polymerize, and the conversion rate is low
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Embodiment 1
[0015] Dissolve 10g of ammonium persulfate in 100ml of water;
[0016] Dissolve 15g of acrylamide in 50ml of water, add 0.1g of nano silicon dioxide and 10ml of ammonium persulfate solution, and stir evenly.
[0017] Pour the mixed solution into a plastic bottle, place it in a vacuum oven at 70°C for 3-5 minutes, open the vacuum valve, pump the oven to a pressure of 0.01 MPa, and react for 4 hours.
[0018] Put the product in a 70°C oven for 2-3 hours, take it out, cut it into small pieces, then put it in a 70°C oven until dry, take it out and crush it.
Embodiment 2
[0020] Dissolve 10g of ammonium persulfate in 100ml of water;
[0021] Dissolve 20g of acrylamide in 50ml of water, add 0.15g of nano silicon dioxide and 15ml of ammonium persulfate solution, and stir evenly.
[0022] Pour the mixed solution into a plastic bottle, place it in a vacuum oven at 70°C for 3-5 minutes, open the vacuum valve, pump the oven to a pressure of 0.01 MPa, and react for 4 hours.
[0023] Put the product in a 70°C oven for 2-3 hours, take it out, cut it into small pieces, then put it in a 70°C oven until dry, take it out and crush it.
Embodiment 3
[0025] Dissolve 10g of ammonium persulfate in 100ml of water;
[0026] Dissolve 17g of acrylamide in 50ml of water, add 0.13g of nano silicon dioxide and 13ml of ammonium persulfate solution, and stir evenly.
[0027] Pour the mixed solution into a plastic bottle, place it in a vacuum oven at 70°C for 3-5 minutes, open the vacuum valve, pump the oven to a pressure of 0.01 MPa, and react for 4 hours.
[0028] Put the product in a 70°C oven for 2-3 hours, take it out, cut it into small pieces, then put it in a 70°C oven until dry, take it out and crush it.
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Abstract
The invention discloses a method for preparing polyacrylamide, belonging to the technical field of synthesis of water-soluble macromolecular materials. According to the method, polyacrylamide with the molecular weight being over 1 million can be prepared by adopting inorganic nano-silica and ammonium persulfate as a compound initiator, carrying out low-temperature and low-pressure reaction, then drying and crushing. Due to the compound initiator, acrylamide is promoted to be polymerized on the surfaces of nanoparticles; compared with the traditional preparation methods, the method has the advantages that the preparation process is simple, the conditions are easily controlled, the large-scale industrial production is facilitated, and the molecular weight of a product is about 1.7 million.
Description
technical field [0001] The invention belongs to the technical field of water-soluble polymer material synthesis. In particular, it relates to a preparation method of polyacrylamide. technical background [0002] Polyacrylamide (PAM) is an important class of water-soluble polymers with special physical and chemical properties. It is easy to obtain various modified products with branched chain or network structure through grafting or crosslinking. It is widely used in petroleum , metal and chemical mining, water treatment, textile, paper and other industries. The current methods of synthesizing polyacrylamide mainly include aqueous solution polymerization, inverse emulsion polymerization, inverse microemulsion polymerization, suspension polymerization, precipitation polymerization and so on. [0003] In the aqueous polymerization of PAM, the initiator largely determines the relative molecular mass, microstructure and performance of the product obtained after the polymerizat...
Claims
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Application Information
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