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Method for preparing polymer nanocomposite through ultrasonic-assisted forced infiltration

A nano-composite material, ultrasonic-assisted technology, applied in the direction of coating, etc., can solve problems such as difficult to uniformly disperse nano-fillers, affect the use, and affect the performance of nano-composite materials

Inactive Publication Date: 2020-06-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these traditional methods mainly disperse nanofillers into polymer matrix materials to prepare nanocomposites. When the viscosity of polymer matrix materials is high, it is difficult to achieve uniform dispersion of nanofillers in the polymer matrix. The prepared nanocomposites The performance and other aspects of the material are affected, affecting its use in some important fields

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  • Method for preparing polymer nanocomposite through ultrasonic-assisted forced infiltration
  • Method for preparing polymer nanocomposite through ultrasonic-assisted forced infiltration
  • Method for preparing polymer nanocomposite through ultrasonic-assisted forced infiltration

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this embodiment, carbon nanotube flakes infiltrate polydimethylsiloxane matrix, including the following steps: as figure 1 Shown:

[0028] Ⅰ. Ultrasonic dispersion to prepare a homogeneous dispersion: add 1g of carbon nanotube powder and 3g of sodium lauryl sulfate to deionized water to make a 400ml solution, and use ultrasonic high-frequency oscillation for 60 minutes to make the solute in the solvent Uniformly disperse to prepare a homogeneous dispersion of carbon nanotubes;

[0029] Ⅱ. Preparation of nanomaterial sheets by vacuum filtration: drop 10ml of homogeneous dispersion of carbon nanotubes on a PTFE filter membrane with a diameter of 25mm and a pore size of 200nm, and stack the dispersion on the PTFE filter membrane layer by layer through vacuum filtration After being fully washed and dried, it was peeled off from the nanoporous membrane to obtain carbon nanotube flakes with uniform thickness, such as Figure 3-5 shown;

[0030] Ⅲ. Preparation of polymer...

Embodiment 2

[0034] In this embodiment, carbon nanotube flakes infiltrate the polypropylene matrix, including the following steps:

[0035] Ⅰ. Ultrasonic dispersion to prepare a homogeneous dispersion: add 1g of carbon nanotube powder and 3g of sodium lauryl sulfate to deionized water to make a 400ml solution, and use ultrasonic high-frequency oscillation for 60 minutes to make the solute in the solvent Uniformly disperse to prepare a homogeneous dispersion of carbon nanotubes;

[0036] Ⅱ. Preparation of nanomaterial sheets by vacuum filtration: drop 10ml of homogeneous dispersion of carbon nanotubes on a PTFE filter membrane with a diameter of 25mm and a pore size of 200nm, and stack the dispersion on the PTFE filter membrane layer by layer through vacuum filtration After fully washing and drying, it is peeled off from the nanoporous membrane to obtain carbon nanotube flakes with uniform thickness;

[0037] Ⅲ. Ultrasonic-assisted forced infiltration to prepare polymer nanocomposites: The...

Embodiment 3

[0041] In this embodiment, nano-boron nitride flakes infiltrate the epoxy resin matrix, including the following steps:

[0042] Ⅰ. Ultrasonic dispersion to prepare a homogeneous dispersion: add 1g of nano-boron nitride and 3g of sodium dodecyl sulfate to deionized water to make a 400ml solution, and use ultrasonic high-frequency oscillation for 60 minutes to make the solute in the solvent Uniformly disperse to prepare nano boron nitride homogeneous dispersion;

[0043] Ⅱ. Preparation of nanomaterial sheets by vacuum filtration: drop 10ml of nano-boron nitride homogeneously dispersed liquid on a PTFE filter membrane with a diameter of 25mm and a pore size of 200nm, and stack the dispersion liquid layer by layer onto the PTFE filter through vacuum filtration. On the membrane, peel off from the nanoporous membrane after being fully cleaned and dried to obtain nano boron nitride flakes with uniform thickness;

[0044] Ⅲ. Preparation of polymer nanocomposites by ultrasonic-assiste...

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Abstract

The invention provides a method for preparing a polymer nanocomposite through ultrasonic-assisted forced infiltration. The method comprises the following steps of: preparing homogeneous dispersion liquid through ultrasonic dispersion; preparing nanomaterial flakes through vacuum filtration; preparing the polymer nanocomposite through ultrasonic-assisted forced infiltration; and performing heat preservation solidification or cooling setting on the polymer nanocomposite prepared in step III. According to the method, nano-filler networks which are tightly stacked are prepared firstly to overcomethe obstacle of surface tension; and a high-viscosity polymer matrix material is forcibly infiltrated into the filler networks to prepare the nanocomposite product with nano-fillers uniformly dispersed in the polymer matrix, and meanwhile ensure that the complete nano-filler networks exist in the product. The polymer nanocomposite shows excellent mechanical properties, electrical / thermal conductivity, electromagnetic shielding properties, dielectric properties, and the like. Therefore, the polymer nanocomposite prepared by the method can be applied to devices or systems such as flexible sensors, thermal interface materials, dielectric elastomers, and light-to-heat converters.

Description

technical field [0001] The invention relates to a method for preparing a polymer nanocomposite material, in particular to a method for preparing a polymer nanocomposite material by ultrasonic-assisted forced infiltration. Background technique [0002] Nanocomposite materials are composed of polymer matrix materials and nanofillers. Depending on the selected polymer matrix and nanofillers, nanocomposites can have various excellent mechanical properties, electrical / thermal conductivity, electromagnetic shielding properties, and dielectric properties. performance. In addition, the performance of nanocomposite products has a high degree of designability, and is widely used in many fields such as aerospace, national defense, transportation, and sports. [0003] Nanofillers can be mixed with polymer matrix materials by methods such as melt blending, solution mixing, and in-situ polymerization, and then further processed by injection molding, extrusion molding, compression molding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/50B29C70/54B29C41/30B29B7/74C08L83/04C08L23/06C08L63/00C08L1/02C08L69/00C08K3/04C08K7/00C08K7/06C08J5/00C08J5/04
CPCB29B7/002B29B7/74B29C41/30B29C70/50B29C70/54C08J5/005C08J5/041C08J2323/06C08J2363/00C08J2369/00C08J2383/04C08J2401/02C08K7/00C08K2201/001C08K2201/011C08K3/041C08K3/042
Inventor 孙靖尧张豪蔡恒志张晓文吴大鸣庄俭郑秀婷许红刘颖
Owner BEIJING UNIV OF CHEM TECH
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