Method for preparing high dielectric constant polymer-based nano composite material

A technology of nanocomposite materials and polymers, which is applied in the direction of textiles, papermaking, non-woven fabrics, etc., can solve the problems of uniform dispersion of filler particles, and achieve the goals of improving uniform dispersion, reducing agglomeration, excellent thermal stability and mechanical properties Effect

Inactive Publication Date: 2013-06-12
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of uniform dispersion of filler particles in the preparation process of polymer-based composite materials, and to provide a method for preparing ultra-thin polymer-based composite materials with high dielectric constant with simple operation and low energy consumption

Method used

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  • Method for preparing high dielectric constant polymer-based nano composite material
  • Method for preparing high dielectric constant polymer-based nano composite material
  • Method for preparing high dielectric constant polymer-based nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment one: polyimide / barium titanate (PI / BaTiO 3 ) Preparation of high dielectric nanocomposites

[0031] The synthetic polyimide monomers selected in this example are 4,4'-terephthalic dioxydiphthalic anhydride (HQDA) and 4,4'-diphenyl ether diamine (ODA). In fact, polyimides with different structures can be selected as the matrix of composite materials according to specific needs.

[0032] Follow the steps below to prepare polyimide / barium titanate (PI / BaTiO 3 ) high dielectric nanocomposites:

[0033]1) Prepare polyamic acid solution by low-temperature polymerization: weigh 4.0046g (0.02mol) 4,4'-diphenyl ether diamine (ODA), 8.0462g (0.02mol) 4,4'-terephthalic dioxydiamine Add phthalic anhydride (HQDA) into a three-necked flask, add 60mL DMAc, stir vigorously, first react at -5°C for 6h, then raise the temperature to 10°C for 6h to obtain a polyamic acid (PAA) solution.

[0034] 2) Add 10g BaTiO 3 Add the powder into 40g of absolute ethanol, and disperse w...

Embodiment 2

[0039] Example two: polyvinylidene fluoride / barium titanate (PVDF / BaTiO 3 ) Preparation of high dielectric nanocomposites:

[0040] 1) Add 18g PVDF and 82g DMF into a three-necked flask, stir and dissolve at room temperature to obtain a solution suitable for electrospinning.

[0041] 2) Prepare BaTiO according to the method of step 2) of Example 1 3 suspension;

[0042] 3) Electrospinning the PVDF solution obtained in step 1), the electrospinning conditions are: voltage 17kV, the distance between the needle tip and the receiving device is 25cm; at the same time, the BaTiO obtained in step 2) 3 The suspension was electrostatically sprayed, and the electrospray conditions were as follows: the voltage was 28kV, the distance between the needle tip and the receiving device was 15cm; a continuously rotating drum was used as the receiving device; the BaTiO 3 The content is 0-50vol%; PVDF / BaTiO is finally obtained on the receiving device 3 nanofibrous membrane.

[0043] 4) The na...

Embodiment 3

[0045] Example 3: Preparation of polyimide / carbon nanotube (PI / CNTs) high dielectric nanocomposite

[0046] 1) PAA solution obtained by step 1) in Example 1;

[0047] 2) The carboxylated carbon nanotubes were added to a mixed solvent of DMAc and acetone (5:5 volume ratio), and dispersed by ultrasonic stirring to obtain a stable suspension.

[0048] 3) Electrospinning the PAA solution obtained in step 1), the electrospinning conditions are: voltage 25kV, the distance between the needle tip and the receiving device is 20cm; at the same time, the carbon nanotube suspension obtained in step 2) is electrostatically sprayed; The spraying conditions are: the voltage is 18kV, the distance between the needle tip and the receiving device is 25cm; the continuously rotating drum is used as the receiving device; the content of CNTs is adjusted to 0-18vol%; the PAA / CNTs nanofiber film is finally obtained on the receiving device.

[0049] 4) Treat the fiber membrane obtained in step 3) acco...

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Abstract

The invention provides a method for preparing high dielectric constant polymer-based nano composite material. The method comprises the following steps: performing electrostatic spinning on a polymer matrix solution and simultaneously performing electrostatic spraying on a filler particle suspension; simultaneously receiving the products of the electrostatic spinning and the electrostatic spraying through a common receiving device to obtain a composite fiber membrane; and finally obtaining the high dielectric constant polymer-based nano composite material with filler particles uniformly dispersed after the composite fiber membrane is processed through a hot-pressing processing technique. The composite material prepared by the invention has the characteristics of high dielectric constant, low dielectric loss and the like; and at the same time the dielectric constant of the composite material can be adjusted through adjusting the content of the filler particles in the polymer matrix. The invention has the advantages of simple process, convenient operation and little environment pollution, can well solve the problem that the filler particles is uniformly dispersed in the polymer matrix, and is expected to the microelectronic industry as dielectric material and the like for preparing embedded capacitors.

Description

technical field [0001] The invention belongs to the technical field of polymer-based nanocomposite materials and processing thereof, and in particular relates to a method for preparing nanocomposite materials with high dielectric properties. Background technique [0002] With the rapid development of the electronic industry, the components of electronic devices are faced with the requirement of high integration, that is, it is imperative to prepare light, thin, small and multi-functional electronic devices. Passive components (including capacitors, resistors, inductors, etc.) are crucial components in electronic circuits. Capacitors can be widely used in filtering, rectification, timing, AC-DC conversion, decoupling, and energy storage. Play an integral role in electronic circuits. According to C=εS / d (C is the capacitance of the capacitor, ε is the dielectric constant, S is the area of ​​the capacitor dielectric material, and d is the thickness of the dielectric material),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728D04H1/541
Inventor 侯豪情丁义纯谢成宸陈林林
Owner JIANGXI NORMAL UNIV
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