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A kind of thermosensitive graphite oxide composite hydrogel and preparation method thereof

A composite hydrogel and oxide stone technology, which is applied in the field of polymer materials, can solve the problems of complicated composite hydrogel methods and less temperature-sensitive hydrogels, and achieve simple methods, accelerated solid dispersion, and wide sources Effect

Active Publication Date: 2020-12-29
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a lot of research work has been done on polymer / graphite oxide composite materials, the methods for preparing composite hydrogels are relatively complicated, and relatively few have been used to study temperature-sensitive hydrogels.

Method used

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  • A kind of thermosensitive graphite oxide composite hydrogel and preparation method thereof
  • A kind of thermosensitive graphite oxide composite hydrogel and preparation method thereof
  • A kind of thermosensitive graphite oxide composite hydrogel and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) a kind of thermosensitive graphite oxide composite hydrogel and preparation method thereof according to claim 1, the composite hydrogel preparation process is: other conditions are as described in claim 1, get 0.7g graphite oxide, ultrasonic Disperse according to the corresponding shortest duration described in claim 1, add respectively DAAM by graphite oxide DAAM mass ratio 0, 1:1.5, 1:3, 1:4, 1:6 ratio, add monomer gross mass 0.3% Joint agent to prepare graphite oxide composite hydrogel.

[0027] (2) Determination of water absorption: test according to GBT8810-2005; it is characterized in that the equilibrium swelling rate is calculated according to the following formula:

[0028]

[0029] In the formula:

[0030] m i —mass of composite hydrogel after long-term water absorption and saturation, g;

[0031] M——the mass of dry gel after drying in an oven, g.

Embodiment 2

[0033] Temperature sensitivity test: take the same amount of composite hydrogel (graphite oxide DAAM mass ratio 1:4, ultrasonic dispersion according to the corresponding shortest time as described in claim 1, prepared by 0.3% cross-linking agent for total monomer mass), soak in The temperatures were 25°C, 35°C, 45°C, 55°C, 65°C, and 75°C in deionized water. After reaching the swelling equilibrium, test the equilibrium swelling rate under the above temperature conditions.

Embodiment 3

[0035] Other conditions are as described in claim 1, get 0.7g graphite oxide, DAAM is added according to 4 times of graphite oxide mass, ultrasonic dispersion is according to claim 1 corresponding shortest duration, crosslinking agent consumption is respectively 1.0 of the total mass of the monomer %, 0.7%, 0.5%, 0.3%, and 0.2% prepared composite hydrogels, respectively, to measure their equilibrium swelling rates at 25°C.

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Abstract

The invention relates to thermosensitive graphite oxide composite aquagel and a preparation method thereof and belongs to the technical field of chemical engineering in high polymers. The method is specifically implemented according to the following steps: firstly, preparing graphite oxide by an improved Hummers method, then, dispersing the graphite oxide and a polymerization monomer into an aqueous solution under ultrasonic assistance, and carrying out a heat-preserving reaction, thereby obtaining thermosensitive poly(acrylic acid / diacetone acrylamide / acrylamide) / graphite oxide composite aquagel. During the preparation of the aquagel, multi-step reaction is not required, N2 introducing treatment is not required, and the method is easy and feasible. The composite aquagel prepared by the method has the advantages of appropriate water retention property, good thermal shrinkage sensitivity and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a temperature-sensitive graphite oxide composite hydrogel and a preparation method thereof. Background technique [0002] Cheap and easy-to-obtain monomers such as acrylic acid (AA), acrylamide (AM) and diacetone acrylamide (DAAM) can be polymerized into polymers alone, or can be polymerized with many other monomers to form copolymers, because they contain The hydrophilic group makes the polymer have certain water absorption. Although the homopolymer of DAAM is insoluble in water, it has "water breathability", the water absorption rate can reach 20%-25% of its own weight, and when the ambient humidity is lower than 60%, the absorbed water can be released; at the same time It can exhibit amphiphilicity with other hydrophilic components in the component, so that the water retention of the material can be combined with temperature sensitivity. [0003] Hydrogel is a poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F222/38C08K3/04C08J3/075
CPCC08F220/56C08J3/075C08J2333/26C08K3/042C08F220/06C08F222/385
Inventor 王斌马祥梅
Owner ANHUI UNIV OF SCI & TECH
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