Preparation method of poly(N-isopropyl acrylamide)/oxidized graphene hydrogel

A technology of isopropylacrylamide and graphene hydrogel, which is applied in the field of nanocomposite hydrogel preparation, can solve the problems of complex hydrogel preparation methods, achieve good photothermosensitivity, easy control, and excellent light The effect of thermal properties

Inactive Publication Date: 2016-04-20
西安艾菲尔德复合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of poly(N-isopropylacrylamide)/graphene oxide hydrogel pre...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The poly(N-isopropylacrylamide) / graphene oxide hydrogel preparation method is specifically implemented in the following steps:

[0040] Step 1, prepare graphite oxide

[0041] 1.1) Weigh 1g graphite powder, 1.2gNaNO 3 , put it into a beaker, stir in a constant temperature water bath at 35°C to 36°C, and add 40ml of 50% H 2 SO 4 Add to beaker and stir for 10min;

[0042] 1.2) Add 6gKMnO to the beaker 4 , stirring for 6h;

[0043] 1.3) Add 80mlH to the beaker 2 O, stirred for 0.5h, then added 200mlH 2 O, and press to add 2.5ml30%H 2 o 2 , to obtain a suspension solution;

[0044] 1.4) Wash the solid mixture repeatedly with a large amount of water until the pH of its aqueous solution is ≈4.0, freeze the graphite oxide solution with liquid nitrogen, and then put it into a freeze dryer for drying for 10 hours to obtain graphite oxide.

[0045] Step 2, preparing poly(N-isopropylacrylamide) / graphene oxide hydrogel

[0046] 2.1) Weigh 1g graphite oxide, 10gH 2 O, afte...

Embodiment 2

[0050] The poly(N-isopropylacrylamide) / graphene oxide hydrogel preparation method is specifically implemented in the following steps:

[0051] Step 1, prepare graphite oxide

[0052] 1.1) Weigh 2g graphite powder, 2.4gNaNO 3 , put it into a beaker, stir in a constant temperature water bath at 35°C to 36°C, and mix 80ml of 50% H 2 SO 4 Add to beaker and stir for 10min;

[0053] 1.2) Add 14gKMnO to the beaker 4 , stirring for 6h;

[0054] 1.3) Add 165mlH to the beaker 2 O, stirred for 0.5h, then added 412.5mlH 2 O, and press to add 5ml30%H 2 o 2 , to obtain a suspension solution;

[0055] 1.4) Wash the solid mixture repeatedly with a large amount of water until the pH of its aqueous solution is ≈4.0, freeze the graphite oxide solution with liquid nitrogen, and then put it into a freeze dryer for drying for 10 hours to obtain graphite oxide.

[0056] Step 2, preparing poly(N-isopropylacrylamide) / graphene oxide hydrogel

[0057] 2.1) Weigh 2g graphite oxide, 20gH 2 O, ...

Embodiment 3

[0061] The poly(N-isopropylacrylamide) / graphene oxide hydrogel preparation method is specifically implemented in the following steps:

[0062] Step 1, prepare graphite oxide

[0063] 1.1) Weigh 3g graphite powder, 3.6gNaNO 3 , put it into a beaker, stir in a constant temperature water bath at 35°C to 36°C, and mix 135ml of 50% H 2 SO 4 Add to beaker and stir for 10min;

[0064] 1.2) Add 24gKMnO to the beaker 4 , stirring for 6h;

[0065] 1.3) Add 280mlH to the beaker 2 O, stirred for 0.5h, then added 700mlH 2 O, and press to add 9ml30%H 2 o 2 , to obtain a suspension solution;

[0066] 1.4) Wash the solid mixture repeatedly with a large amount of water until the pH of its aqueous solution is ≈4.0, freeze the graphite oxide solution with liquid nitrogen, and then put it into a freeze dryer for drying for 10 hours to obtain graphite oxide.

[0067] Step 2, preparing poly(N-isopropylacrylamide) / graphene oxide hydrogel

[0068] 2.1) Weigh 2.5g graphite oxide, 25gH 2 O,...

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PUM

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Abstract

The invention discloses a preparation method of poly(N-isopropyl acrylamide)/oxidized graphene hydrogel. The preparation method comprises the following steps: at first, oxidizing graphite to obtain oxidized graphite; and then subjecting the oxidized graphite to radiation polymerization under a radiation source with a temperature of 60 DEG C to obtain the poly(N-isopropyl acrylamide)/oxidized graphene hydrogel. According to the preparation method, graphene oxide (GO) is dispersed into a water solution of (N-isopropyl acrylamide) NIPAM monomers and then the mixture is subjected to radiation polymerization to prepare the hydrogel. Multi-step reactions and organic solvent are not needed. The preparation method is simple and direct and is easy to control. The product is more pure and is more suitable for being used as a biological material. By changing the content of GO before polymerization, the amount of GO loaded on hydrogel can be easily controlled. Moreover, GO has excellent optical and thermal properties, and thus the poly(N-isopropyl acrylamide)/oxidized graphene hydrogel has an excellent light and heat sensitive property.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite hydrogel preparation, and relates to a preparation method of poly(N-isopropylacrylamide) / graphene oxide hydrogel. Background technique [0002] Polymer smart hydrogels have attracted much attention due to their ability to undergo reversible phase transitions in response to external stimuli such as temperature and pH. It is precisely because of this excellent and attractive stimuli-responsive performance that smart hydrogels have been highly evaluated in a series of applications such as controlled drug release, biological tissue engineering, and microdevices. In recent years, nanocomposite hydrogels have been widely studied, especially their excellent and unique composite properties have attracted the attention of researchers. Its composite properties originate from the synergistic effect of nanomaterials and smart hydrogels. For example, nanomaterials loaded into hydrogels can absorb speci...

Claims

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Application Information

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IPC IPC(8): C08F220/54C08F222/38C08F2/46C08K9/02C08K3/04C08J3/075
Inventor 齐海港
Owner 西安艾菲尔德复合材料科技有限公司
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