A kind of preparation method of modified graphene polymethyl methacrylate composite film

A technology of polymethyl methacrylate and composite film is applied in the field of preparation of modified graphene-polymethyl methacrylate composite film, which can solve the problem of incapability of polymer matrix composite, limited research and application scope, hydrophilicity, Problems such as poor lipophilicity, to achieve the effect of easy availability of materials, good chemical stability and low price

Active Publication Date: 2017-12-29
奥斯汀科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the surface of graphene is in an inert state, and the interaction with other media is weak, and there is a strong van der Waals force between graphene sheets, resulting in poor hydrophilicity and lipophilicity, which makes it suitable for polymers. The dispersion in the matrix of methyl methacrylate is poor and easy to agglomerate, so it cannot be well compounded with the polymer matrix, which greatly limits the further research and application range of graphene-PMMA composites

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  • A kind of preparation method of modified graphene polymethyl methacrylate composite film
  • A kind of preparation method of modified graphene polymethyl methacrylate composite film

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preparation example Construction

[0027] One, a kind of preparation method of modified graphene-polymethyl methacrylate composite film, comprises the steps:

[0028] 1) Preparation of modified graphene: first disperse graphene oxide in deionized water, and stir at room temperature for 0.1-24 hours with ultrasonic vibration to obtain a graphene oxide-water dispersion with a concentration of 0.01-3.0 mg / mL; then Add 7-hydroxy-4-methylcoumarin to the graphene oxide-water dispersion, stir at 20-50°C for 0.1-10h; then add alkaline solution, stir for 0.1-12h, and adjust the pH to 9-10; then add a chemical reducing agent, and react at 60-100°C for 10-100h to obtain a modified mixed solution; filter the modified mixed solution to obtain a solid substance, and then wash the said modified mixed solution with ethanol and deionized water in sequence Solid matter to neutral; placed in the atmosphere or vacuum environment, dried at 40-80 ° C to constant weight, that is, modified graphene is obtained;

[0029] The operation...

Embodiment 1

[0038] Adopt the following method to prepare modified graphene-polymethyl methacrylate composite film:

[0039] 1) Preparation of modified graphene: first disperse graphene oxide in deionized water, and ultrasonically shake and stir at room temperature for 16 hours to obtain a graphene oxide-water dispersion with a concentration of 0.1 mg / mL;

[0040]Then add 7-hydroxy-4-methylcoumarin to the graphene oxide-water dispersion, stir at 35°C for 1h; then add an aqueous sodium hydroxide solution with a concentration of 0.5 mol / L, and stir for 0.5h, And adjust the pH value to 9-10; then add the chemical reducing agent hydrazine hydrate, and react at 90°C for 28 hours to obtain the modified mixed solution;

[0041] Suction filter the modified mixed solution to obtain a solid substance, and then wash the solid substance with ethanol and deionized water to neutrality; place it in an atmospheric environment, and dry it to a constant weight at 65°C to obtain the modified graphene ;

[...

Embodiment 2

[0047] Adopt the following method to prepare modified graphene-polymethyl methacrylate composite film:

[0048] 1) Preparation of modified graphene: first disperse graphene oxide in deionized water, and ultrasonically shake and stir at room temperature for 12 hours to obtain a graphene oxide-water dispersion with a concentration of 0.05 mg / mL;

[0049] Then add 7-hydroxy-4-methylcoumarin to the graphene oxide-water dispersion, stir at 30°C for 2h; then add an aqueous sodium hydroxide solution with a concentration of 2.0 mol / L, stir for 1h, and Adjust the pH value to 9-10; then add the chemical reducing agent vitamin C, and react at 85°C for 18 hours to obtain the modified mixed solution;

[0050] Suction filter the modified mixed solution to obtain a solid substance, and then wash the solid substance with ethanol and deionized water to neutrality; place it in an atmospheric environment, and dry it to a constant weight at 55°C to obtain the modified graphene ;

[0051] The ma...

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Abstract

The invention discloses a preparation method of a modified graphene / polymethyl methacrylate (PMMA) composite film. The preparation method is characterized by selecting 7-hydroxy-4-methylcoumarin as a modifying agent and hydrazine hydrate, vitamin C or glucose, and the like as a chemical reducing agent; firstly preparing modified graphene, then preparing a dispersion liquid of modified graphene and then adding the dispersion liquid of modified graphene to a PMMA water solution to obtain a uniformly dispersed modified graphene / PMMA mixed solution; finally pouring the mixed solution into a vessel and drying the mixed solution to constant weight at 40-80 DEG C in the atmosphere or vacuum environment, thus obtaining the modified graphene / PMMA composite film, wherein the mass fraction of modified graphene is 0.1-15%. The preparation method has the advantages of simplicity in preparation, mild reaction conditions, easiness in operation and control, and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material preparation, and in particular relates to a preparation method of a modified graphene-polymethyl methacrylate composite film. Background technique [0002] Polymethyl methacrylate (PMMA), commonly known as plexiglass, has good chemical stability, high light transmittance, solubility and film-forming properties, high mechanical properties, safety and non-toxicity, low price, and easy molding Processing, widely used in aviation, optical instruments, construction and other fields. However, polymethyl methacrylate itself is brittle and easy to crack, and its thermal stability is poor, which limits the application of polymethyl methacrylate and its composite materials in many fields. [0003] Graphene is a new type of two-dimensional nanocarbon material with excellent electrical, mechanical and thermal properties. Therefore, adding it to polymers as a nanofiller component can effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L33/12C08K9/04C08K3/04
Inventor 黄杰杨云逸
Owner 奥斯汀科技有限公司
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