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Sodium alginate-acrylamide composite aquagel, and preparation method and application thereof

A composite hydrogel and acrylamide technology, which is applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve problems such as easy swelling, limit the application of sodium alginate, and poor mechanical properties, and achieve Low cost, good multivalent ion adsorption capacity and biocompatibility, and the effect of improving mechanical properties

Active Publication Date: 2016-04-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Sodium alginate can well complex with divalent and above metal ions, and has good adsorption performance; but pure sodium alginate is easy to swell in water and has poor mechanical properties, which greatly limits the application of sodium alginate

Method used

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  • Sodium alginate-acrylamide composite aquagel, and preparation method and application thereof
  • Sodium alginate-acrylamide composite aquagel, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of sodium alginate-acrylamide composite hydrogel, its preparation method comprises the following steps:

[0035] Dissolve sodium alginate (SA) powder and acrylamide (AM) in ionized water at a mass ratio of 1:5 at room temperature to obtain a uniform mixed solution I. The total concentration of sodium alginate and acrylamide in mixed solution I is 11wt %; then add N,N'-diallyl tartaric acid diamide and sodium persulfate in turn, after dissolving, perform vacuum defoaming treatment (vacuumize to 0.02MPa, time is 2h), then add sodium bisulfite and mix evenly, The mass ratios of N,N'-diallyl tartaric acid diamide, sodium persulfate, sodium bisulfite and acrylamide monomer are 3.85:0.9:1.55:100 respectively, and then the resulting solution is transferred to a glass under nitrogen atmosphere In the mold, after sealing, heat-retain and react at 70° C. for 2.5 hours to form the sodium alginate-acrylamide composite hydrogel.

[0036] The formed sodium alginate-acrylamide...

Embodiment 2

[0039] A kind of sodium alginate-acrylamide composite hydrogel, its preparation method comprises the following steps:

[0040]Dissolve sodium alginate (SA) powder and acrylamide (AM) in ionized water at a mass ratio of 1:7 at room temperature to obtain a uniform mixed solution I, the total concentration of sodium alginate and acrylamide in mixed solution I is 13wt %; then add divinylbenzene and potassium persulfate in turn, after dissolving, carry out vacuum defoaming treatment (vacuumize to 0.015MPa, time is 1.3h), then add sodium sulfite and mix evenly, wherein divinylbenzene, potassium persulfate, The mass ratio of sodium sulfite to acrylamide monomer is 2.95:1.9:2.35:100 respectively, and then the obtained solution is transferred to a glass mold in a nitrogen atmosphere, sealed and kept at 60°C for 6 hours, and the alginic acid is obtained by molding Sodium-acrylamide composite hydrogel.

[0041] The formed sodium alginate-acrylamide composite hydrogel was taken out and c...

Embodiment 3

[0044] A kind of sodium alginate-acrylamide composite hydrogel, its preparation method comprises the following steps:

[0045] Dissolve sodium alginate (SA) powder and acrylamide (AM) in ionized water at a mass ratio of 1:9 at room temperature to obtain a uniform mixed solution I, the total concentration of sodium alginate and acrylamide in mixed solution I is 15wt %; then add polyoxyethylene glycol diacrylate and sodium persulfate in sequence, after dissolving, carry out vacuum defoaming treatment (vacuumize to 0.01MPa, time is 2.5h), then add sodium thiosulfate and mix evenly, among which polycondensate The mass ratios of ethylene glycol diacrylate, sodium persulfate, sodium thiosulfate and acrylamide monomer are 4.8:0.1:0.25:100 respectively, and then the resulting solution is transferred to a glass mold in an argon atmosphere, sealed and placed in The sodium alginate-acrylamide composite hydrogel was molded and reacted at 45° C. for 4 hours.

[0046] The formed sodium alg...

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Abstract

The invention discloses a sodium alginate-acrylamide composite aquagel. The preparation method comprises the following steps: 1) proportionally dissolving sodium alginate and acrylamide in water, and uniformly mixing; 2) sequentially adding a crosslinking agent and an initiator, carrying out vacuum degassing treatment, and adding a catalyst; and 3) transferring the obtained mixed solution into a glass mold, and heating to react, thereby obtaining the sodium alginate-acrylamide composite aquagel. The sodium alginate-acrylamide composite aquagel has favorable multivalent ion adsorption capacity and biocompatibility. By combining the polyacrylamide network with the graft copolymerization action of the sodium alginate and acrylamide, the mechanical properties of the aquagel are effectively enhanced. The aquagel is sensitive under the condition of different pH values, can generate intermolecular interactions with multiple cationic dyes and heavy metal ions, and is applicable to the fields of chemical substance adsorptive separation, sewage treatment and the like.

Description

technical field [0001] The invention belongs to the field of environmental protection materials, and in particular relates to a sodium alginate-acrylamide composite hydrogel and a preparation method and application thereof. Background technique [0002] With the development of industry, the acceleration of urbanization and the expansion of population, my country is facing a very severe water environment situation. In recent years, major environmental pollution and accidents have occurred frequently in China, among which water pollution accidents account for about half. According to the statistical analysis of the Ministry of Supervision, there are more than 1,700 water pollution accidents in my country every year, and water pollution has seriously affected the production and life of the people. On April 16, 2015, the State Council officially released the "Water Pollution Prevention and Control Action Plan", and the "Water Ten Measures" were issued. The reasons for serious ...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/56C02F1/28C02F1/62
CPCC02F1/285C02F1/62C08F251/00C08F220/56
Inventor 戴红莲康海飞魏雯颖吴艳增
Owner WUHAN UNIV OF TECH
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