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Preparation method of organic-inorganic composite membrane and organic-inorganic composite membrane

An inorganic composite membrane and organic technology, which is applied in the preparation of organic-inorganic composite membranes and in the field of organic-inorganic composite membranes, which can solve the problems of agglomeration and alignment of inorganic nanoparticles that are difficult to solve.

Active Publication Date: 2021-06-11
SHENZHEN BEAUTYSTAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a method for preparing an organic-inorganic composite film, aiming to solve the problem that the commonly used organic-inorganic composite film preparation method is difficult to solve the problem of agglomeration and orientation arrangement of inorganic nanoparticles in the polymer matrix

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  • Preparation method of organic-inorganic composite membrane and organic-inorganic composite membrane
  • Preparation method of organic-inorganic composite membrane and organic-inorganic composite membrane

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[0049] In view of this, the present invention proposes a method for preparing an organic-inorganic composite film, which aims to improve the dispersion and orientation of inorganic nanoparticles in the organic substrate by forming a bionic "brick-mud structure" to obtain a uniform texture. High barrier organic-inorganic composite film. figure 1 It is a schematic flowchart of an embodiment of the preparation method of the organic-inorganic composite membrane 100 provided by the present invention. refer to figure 1 , the preparation method of the organic-inorganic composite membrane 100 proposed by the present invention, comprises the following steps:

[0050] S10, dissolving chitosan in an acid solution, adding epoxy acrylate and a persulfate catalyst, and reacting at 50-80°C to obtain a modified chitosan solution;

[0051] In this step, chitosan is dissolved in acid solution to increase the solubility of chitosan. Mix chitosan and epoxy acrylate evenly, add persulfate as a ...

Embodiment 1

[0107] (1) 10g chitosan (CS) is dissolved in the acetic acid aqueous solution of 2% by mass fraction, is configured into the CS solution that mass fraction is 2%, adds 12g epoxy acrylate (GMA), adds 0.5g potassium persulfate (KPS) is a catalyst, heats up 80 ℃, reacts 12h, prepares epoxy acrylate modified chitosan (CHQ) solution; Concrete chemical reaction formula is as follows:

[0108]

[0109] (2) Add 500ml of ethanol to the CHQ solution to precipitate solid matter in the CHQ solution, centrifuge to separate the solid matter, wash twice with ethanol, and dry at 60°C to obtain CHQ;

[0110] (3) Dissolve 10g of vinyltrimethoxysilane (VTMS) in aqueous ethanol (the volume ratio of ethanol and water is 0.2:1), stir for 1h to make it uniformly dispersed, and prepare a VMTS solution with a mass fraction of 1%; 7.8wt% nano-vermiculite flake dispersion was diluted to 1wt% nano-vermiculite flake dispersion, and ultrasonicated for 1 h. Mix 500g of VTMS solution and 500g of nano-ver...

Embodiment 2

[0116] (1) 10g chitosan (CS) is dissolved in the acetic acid aqueous solution of 2% by mass fraction, is configured into the CS solution that mass fraction is 2%, adds 12g epoxy acrylate (GMA), adds 0.5g potassium persulfate (KPS) is a catalyst, heats up 80 ℃, reacts 12h, prepares epoxy acrylate modified chitosan (CHQ) solution;

[0117] (2) Add 500ml of ethanol to the CHQ solution to precipitate solid matter in the CHQ solution, centrifuge to separate the solid matter, wash twice with ethanol, and dry at 60°C to obtain CHQ;

[0118] (3) Dissolve 10g of vinyltrimethoxysilane (VTMS) in aqueous ethanol (the volume ratio of ethanol and water is 0.2:1), stir for 1h to make it uniformly dispersed, and prepare a VMTS solution with a mass fraction of 1%; 7.8wt% nano-vermiculite flake dispersion was diluted to 1wt% nano-vermiculite flake dispersion, and ultrasonicated for 1 h. Mix 500g of VTMS solution and 500g of nano-vermiculite sheet dispersion, adjust the pH value to 10 with 1mol...

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Abstract

The invention provides a preparation method of an organic-inorganic composite membrane and the organic-inorganic composite membrane. The preparation method of the organic-inorganic composite membrane provided by the invention comprises the steps of firstly, preparing epoxy acrylate modified chitosan, and conducting surface modification on vermiculite flakesby using a silane modifier to obtain modified nano vermiculite flakes; uniformly mixing the modified chitosan and the modified nano vermiculite flake, and adding a catalyst to prepare film forming slurry; and then preparing the film-forming slurry into a film shape, crosslinking and curing the modified chitosan and the modified nano vermiculite flakes, and drying to obtain the organic-inorganic composite film composed of the modified chitosan and the modified nano vermiculite flakes. According to the preparation method of the organic-inorganic composite membrane, the processing mode is simple, efficient, environmentally friendly and non-toxic, the problems of agglomeration and oriented arrangement of inorganic nanoparticles in an organic matrix can be solved, and the prepared organic-inorganic composite membrane is excellent in mechanical property and barrier property.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a preparation method of an organic-inorganic composite membrane and an organic-inorganic composite membrane. Background technique [0002] The high-barrier packaging materials commonly used today are usually plastic packaging films, such as PA / PE, PET / PA / PE co-extruded films, etc. Although plastic packaging films have good oxygen and water vapor barrier properties, they pollute the environment more because they contain non-degradable materials. In order to replace plastic packaging films to obtain high-barrier packaging materials with less impact on the environment, the current common solution is to add graphene oxide, flat double-walled carbon nanotubes, and silicate nanosheets to organic substrates to obtain organic materials. - Inorganic composite materials. [0003] Commonly used methods for preparing organic-inorganic composite materials include addi...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/08C08K9/06C08K7/00
CPCC08J5/18C08J2305/08C08K9/06C08K7/00C08K2201/011
Inventor 刘晓东罗山何业陈寿彭晓华
Owner SHENZHEN BEAUTYSTAR CO LTD