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A kind of preparation method of graphene/chitosan porous sponge oil-absorbing material

A technology for porous sponges and oil-absorbing materials, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of large pores, low reuse rate, and fragile structure of porous materials, and achieve pore The effect of high efficiency, low cost and strong stability

Inactive Publication Date: 2015-10-28
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When only using graphene oxide solution to prepare porous sponge adsorption materials with three-dimensional structure, due to the low concentration of graphene oxide prepared at present, the porous material made has large pores, relatively fragile structure, easy to collapse, and repeated use low rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0017] The embodiment of the preparation method of the graphene / chitosan porous sponge oil-absorbing material of the present invention includes the following steps:

[0018] (1) At room temperature, prepare a chitosan solution with a mass concentration of 2%-4%, and then disperse the graphene oxide solution with a mass concentration of 2%-5% by ultrasonic dispersion, and then slowly add it to the prepared solution while stirring The chitosan solution is fully blended by mechanical stirring to obtain a uniformly mixed graphene / chitosan mixed solution, in which the content of graphene oxide is 6%-30%;

[0019] (2) Prepare a glutaraldehyde solution with a mass concentration of 3%-4%, slowly add it to the prepared graphene / chitosan mixed solution, stir and mix well, and crosslink 1-4 at 60-100℃ Hours; put the solutions of different graphene and chitosan ratios into the mold for freezing, then put the frozen sample in a vacuum freeze dryer, freeze-dry for at least 24 hours, and then obt...

Embodiment 1

[0022] 1. A method for preparing graphene / chitosan porous sponge oil-absorbing material, including the following steps:

[0023] (1) At room temperature, prepare a chitosan solution with a mass concentration of 2%, then ultrasonically disperse the graphene oxide solution with a mass concentration of 2%, and then slowly add it to the prepared chitosan solution while stirring. Then, the mechanical stirring method is used for full blending to obtain a uniformly mixed graphene / chitosan mixed solution, in which the content of graphene oxide is 8%.

[0024] (2) Prepare a glutaraldehyde solution with a mass concentration of 3.5% (the volume ratio of the glutaraldehyde solution to the prepared graphene / chitosan mixed solution is 1:10), and slowly add it to the prepared graphene / shell In the glycan mixed solution, stir and mix homogeneously and crosslink at 60°C for 4 hours. Put solutions of different graphene and chitosan ratios into a mold for freezing, then put the frozen sample in a va...

Embodiment 2

[0029] 1. A method for preparing graphene / chitosan porous sponge oil-absorbing material, including the following steps:

[0030] (1) At room temperature, prepare a chitosan solution with a mass concentration of 3.5%, then ultrasonically disperse the graphene oxide solution with a mass concentration of 2%, and then slowly add it to the prepared chitosan solution while stirring. Then, the mechanical stirring method is used to fully blend to obtain a uniformly mixed graphene / chitosan mixed solution, in which the content of graphene oxide is 18%.

[0031] (2) Prepare a glutaraldehyde solution with a mass concentration of 3.5% (the volume ratio of the glutaraldehyde solution to the prepared graphene / chitosan mixed solution is 1:10), and slowly add it to the prepared graphene / shell In the glycan mixed solution, stir and mix homogeneously, and then crosslink at 80°C for 2 hours. Put solutions of different graphene and chitosan ratios into a mold for freezing, then put the frozen sample i...

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Abstract

The invention provides a preparation method of a graphene / chitosan porous sponge oil absorption material. The preparation method is characterized by comprising the following steps: (1), preparing a chitosan solution under a room temperature condition, carrying out ultrasonic dispersion on an oxidized graphene solution, slowly adding the graphene solution into the prepared chitosan solution while stirring, and fully blending so as to obtain an uniformly mixed graphene / chitosan solution, wherein the content of the oxidized graphene is 6%-30%; (2) preparing a glutaric dialdehyde solution, slowly adding the glutaric dialdehyde solution into the prepared graphene / chitosan mixed solution, stirring and uniformly mixing, and then carrying out crosslinking for 1-4 hours at 60-100 DEG C; and placing the solution with different graphene and chitosan mixture ratios into a mould and refrigerating, placing a refrigerated sample into a vacuum freezing drier, and freezing and drying for at least 24 hours, thus obtaining the graphene / chitosan porous sponge material with a three-dimensional structure. The graphene / chitosan porous sponge material has the advantages that the porosity is large, the adsorption rate is high, the adsorption stability is good and the repeating utilization ratio is high.

Description

Technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a preparation method of a graphene / chitosan porous sponge oil-absorbing material. Background technique [0002] In recent years, oil leakage pollution is the main method of oil pollution. The leakage of various industrial oils and the discharge of domestic waste oil have caused serious pollution and great damage to the river, ocean and ecological environment. According to statistics, nearly 10 million tons of oil enter the water body through various channels every day and pollute the environment. The current effective oil recovery technology and the research and development of oily wastewater purification materials have attracted much attention, and the research on oil-absorbing materials has become The key to solving the problem of oil pollution. [0003] At present, oil-absorbing materials can be divided into three categories: inorganic, organic and organic-in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 曲丽君郭肖青田明伟唐晓宁
Owner QINGDAO UNIV
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