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Interface modifier of organic polymer and iron inorganic composite materials and its preparation

A technology of inorganic composite materials and polymers, applied in the field of interface modifiers and preparations, can solve the problems of low piezoelectric and magnetic properties, poor interface bonding, etc.

Inactive Publication Date: 2008-11-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve piezoelectric ceramics and polymer composite materials, piezoelectric ceramics and polymers and rare earth alloy composite materials, the problem of low piezoelectric performance and magnetoelectric performance due to poor interface bonding
This interface modifier is different from the coupling agent

Method used

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  • Interface modifier of organic polymer and iron inorganic composite materials and its preparation
  • Interface modifier of organic polymer and iron inorganic composite materials and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Add barium acetate to the N, N dimethylformamide (DMF) solution of polyvinylidene fluoride (PVDF) and stir to mix. After mixing evenly, heat up to 60°C to 120°C and add glacial acetic acid. After stirring evenly, The titanate is added dropwise according to the stoichiometric amount to form barium titanate, and reacted for 1 to 4 hours to obtain a polymer-containing nano barium titanate sol. Then distill directly at 120℃~170℃, dry for 7~10 days, and grind the mixture into fine powder after complete drying to obtain nano-BaTiO 3 / PVDF in-situ composite masterbatch.

[0027] Weigh PVDF, BaTiO 3 and nano-BaTiO 3 / PVDF, the volume ratio is: PVDF15~50%, nano-BaTiO 3 / PVDF is 1~5%, the rest is BaTiO 3 . After mixing evenly, pour it into a mold, press at 160-200°C for 15-30 minutes, and obtain interface-modified BaTiO after cooling 3 / PVDF composite material, the SEM image of the composite material is shown in figure 1.

Embodiment 2

[0028] Example 2: Add lead acetate to methanol and stir to mix. After mixing evenly, heat up to 60°C-120°C and add acetylacetone. After stirring evenly, titanate is added dropwise according to the stoichiometric amount of lead titanate, and react for 1-4 hours to obtain Polymer nano lead titanate sol. Then directly distill at 120°C~170°C, dry for 7~10 days, and grind the mixture into fine powder after complete drying to obtain nano-PbTiO 3 . Nano-PbTiO at 500~600℃ 3 Sintering is carried out to obtain nanometer lead titanate ceramic powder. Put the sintered nano-lead titanate into the DMF (N, N dimethylformamide) solution of PVDF, carry out ultrasonic dispersion at room temperature, spread the film on the glass substrate after the dispersion is uniform, and put it in a vacuum of 70 ~ 100 ℃ After the film is dried in a drying oven, it is pulverized into powder.

[0029] Weigh PVDF, lead zirconate titanate (PZT), terbium dysprosium iron (Terfenol-D) and nano-PbTiO 3 / PVDF, t...

Embodiment 3

[0030] Example 3: Add lead acetate to the N, N dimethylformamide (DMF) solution of polyvinylidene fluoride (PVDF) and stir to mix. After mixing evenly, add zirconium nitrate, heat up to 60°C to 120°C, add acetylacetone, and stir After uniformity, titanate is added dropwise according to the stoichiometric amount of lead zirconate titanate, and reacted for 1 to 4 hours to obtain a polymer-containing nano lead titanate sol. Then directly distill at 120°C-170°C, dry for 7-10 days, and grind the mixture into fine powder after complete drying to obtain PVDF / nano-PZT.

[0031]Weigh PVDF, lead zirconate titanate (PZT), terbium dysprosium iron (Terfenol-D) and PVDF / nano-PZT, the volume ratio is: PVDF15~50%, PVDF / nano-PZT is 3~10%, Terfenol-D 1 to 12%, and the rest is PZT. After mixing evenly, pour it into a mold, press at 160-200°C for 15-30 minutes, and obtain an interface-modified PZT / PVDF / Terfenol-D composite material after cooling, add interface modifiers PVDF / nano-PT, PZT / PVDF T...

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Abstract

The modifier for the interface between organic polymer and ferric inorganic composite material has nanometer inorganic particle in the composite material as inorganophilic phase and polymer in the composite material as the compounding mother grain for the organic phase. The interface modifier may be used in composite piezoelectric ceramic-polymer material and in composite piezoelectric ceramic-polymer-RE alloy material. The interface modifier is prepared through either in-situ compounding process or ultrasonic dispersing process, the former includes adding acetate into polymer solution, adding acetylacetone or glacial acetic acid after heating, adding titanate to react, distillation the solution or depositing in solvent to obtain sol, drying and grinding; the latter includes sintering prepared inorganic nanometer particles, ultrasonic dispersing in polymer solution, filming, drying and grinding. The interface modifier is used to improve interface binding and raise performance.

Description

Technical field: [0001] The invention relates to an interface modifier of an organic polymer and a ferroinorganic composite material and its preparation. The interface modifier can be applied to composite materials of piezoelectric ceramics and polymers, composite materials of piezoelectric ceramics, polymers and rare earth alloys. Background technique: [0002] Combining the excellent mechanical properties and film-forming properties of polymer materials with the good electrical properties of ceramic materials is a new way worth exploring. The synthesized composite material overcomes the brittleness of the ceramic material itself and the temperature limitation of the polymer material, and greatly improves the electrical properties of the material. Existing composite processes for preparing such composite materials mainly include salivation method, hot pressing method and spin coating method. These composite methods all have the problem of poor interfacial bonding between ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L27/16C08L29/14C08K3/00
Inventor 董丽杰熊传溪权红英
Owner WUHAN UNIV OF TECH