Preparation method of flexible composite film with hydrophobicity and low dielectric constant

A low dielectric constant and composite film technology, which is applied in the field of dielectric composite material preparation, can solve problems such as poor adhesion, and achieve the effects of large static contact angle, reduced dielectric constant, and low dielectric constant

Active Publication Date: 2021-08-27
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyborosiloxane (PBDMS) is a new type of material in silicone resin modified by inorganic elements. Compared with ordinary organopolysiloxane resin, it has better high temperature resistance and bonding performance, but its attached Therefore, this patent combines the excellent characteristics of the two materials to invent a flexible film with both hydrophobicity and low dielectric constant

Method used

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  • Preparation method of flexible composite film with hydrophobicity and low dielectric constant
  • Preparation method of flexible composite film with hydrophobicity and low dielectric constant
  • Preparation method of flexible composite film with hydrophobicity and low dielectric constant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Step 1, prepare the strain rate sensitive matrix:

[0041] Step 1.1, boric acid (H 3 BO 3 ) is heated at 180°C for 2 hours to prepare pyroboric acid;

[0042] Step 1.2, mix pyroboric acid, dimethylsiloxane and isopropanol, stir in a vacuum kneader at 180°C for 2 hours, and cool the final product to room temperature to obtain a polyborosiloxane (PBDMS) polymer matrix; where , the mass ratio of pyroboric acid, dimethylsiloxane and isopropanol is: 1.5:8:0.5

[0043] Step 2, preparing a hydrophobic P(VDF-TrFE)-PBDMS low dielectric constant flexible composite film.

[0044] Step 2.1 Weigh raw materials according to the following mass ratio: P(VDF-TrFE):PBDMS=65:35;

[0045] Step 2.2 Dissolve P(VDF-TrFE) in the organic solvent DMF, and stir continuously for 6 hours to obtain mixed solution A; wherein, 5.4145 g of P(VDF-TrFE) is required for every 100 mL of DMF;

[0046] Step 2.3 Dissolve PBDMS in isopropanol, and stir continuously for 6-12h to obtain mixed solution B; wh...

Embodiment 2

[0054] Step 1, prepare the strain rate sensitive matrix:

[0055] Step 1.1, boric acid (H 3 BO 3 ) is heated at 180°C for 2 hours to prepare pyroboric acid;

[0056] Step 1.2, mix pyroboric acid, dimethylsiloxane and isopropanol, stir in a vacuum kneader at 180°C for 2 hours, and cool the final product to room temperature to obtain a polyborosiloxane (PBDMS) polymer matrix; where , the mass ratio of pyroboric acid, dimethylsiloxane and isopropanol is: 1.5:8:0.5;

[0057] Step 2, preparing a hydrophobic P(VDF-TrFE)-PBDMS low dielectric constant flexible composite film.

[0058] Step 2.1 Weigh raw materials according to the following mass ratio: P(VDF-TrFE):PBDMS=80:20;

[0059] Step 2.2 Dissolve P(VDF-TrFE) in the organic solvent DMF, and stir continuously for 6-12h to obtain mixed solution A; wherein, 6.664g of P(VDF-TrFE) is required for every 100mL of DMF;

[0060] Step 2.3 Dissolve PBDMS in isopropanol, and stir continuously for 6-12h to obtain mixed solution B; wherein,...

Embodiment 3

[0068] Step 1, prepare the strain rate sensitive matrix:

[0069] Step 1.1, boric acid (H 3 BO 3 ) is heated at 180°C for 2 hours to prepare pyroboric acid;

[0070] Step 1.2, mix pyroboric acid, dimethylsiloxane and isopropanol, stir in a vacuum kneader at 180°C for 2 hours, and cool the final product to room temperature to obtain a polyborosiloxane (PBDMS) polymer matrix; where , the mass ratio of pyroboric acid, dimethylsiloxane and isopropanol is: 1.5:8:0.5;

[0071] Step 2, preparing a hydrophobic P(VDF-TrFE)-PBDMS low dielectric constant flexible composite film.

[0072] Step 2.1 Weigh raw materials according to the following mass ratio: P(VDF-TrFE):PBDMS=85:15;

[0073] Step 2.2 Dissolve P(VDF-TrFE) in the organic solvent DMF, and stir continuously for 6-12h to obtain mixed solution A; wherein, 7.0805g of P(VDF-TrFE) is required for every 100mL of DMF;

[0074] Step 2.3 Dissolve PBDMS in isopropanol, and stir continuously for 6-12h to obtain mixed solution B; where...

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Abstract

The invention discloses a preparation method of a flexible composite film with hydrophobicity and low dielectric constant, which comprises the following steps: dissolving P (VDF-TrFE) by using a DMF organic solvent, dissolving a certain amount of PBDMS in isopropanol, uniformly mixing the two mixed solutions according to a certain proportion, and preparing a P (VDF-TrFE)-PBDMS flexible composite film by using a solution tape casting method. The research shows that the hydrophobic P (VDF-TrFE)-PBDMS flexible composite film still shows typical ferroelectricity, piezoelectricity and hydrophobicity along with the increase of the PBDMS content.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of dielectric composite materials, and in particular relates to a preparation method of a flexible composite film with both hydrophobicity and low dielectric constant. Background technique [0002] In the field of information technology industry, the development of multi-functional, high-performance, and lightweight microelectronic products has greatly promoted the development of ultra-high-density, high-performance key technologies and materials. In order to solve the signal delay and power loss problems caused by high-density integration, the development of a new generation of high-performance low-dielectric or even ultra-low-dielectric materials has become one of the most important research directions in this field. Dielectric organic polymer materials can effectively prevent the electrolytic behavior of conductive droplets, and can increase the change of voltage to the controllable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L27/16C08L83/14
CPCC08J5/18C08J2327/16C08J2483/14
Inventor 游才印周振基田娜陈瑶李峰
Owner XIAN UNIV OF TECH
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