Method for preparing high-dielectric constant composite film of copper phthalocyanine oligomer/polymer

A technology of copper phthalocyanine oligomer chemistry and high dielectric constant, applied in the field of high dielectric constant polymer composite materials, can solve problems such as poor compatibility, poor processing reproducibility, and large dielectric loss

Inactive Publication Date: 2012-07-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between the copper phthalocyanine oligomer and the polymer matrix, it will aggregate into larger particles (about 1m) in the composite, and it is easy to form a conductive channel in the film, so that the dielectric loss of the material becomes smaller. Large, lower breakdown electric field, poor processing reproducibility

Method used

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  • Method for preparing high-dielectric constant composite film of copper phthalocyanine oligomer/polymer
  • Method for preparing high-dielectric constant composite film of copper phthalocyanine oligomer/polymer
  • Method for preparing high-dielectric constant composite film of copper phthalocyanine oligomer/polymer

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Example 1: Dissolve 1.0g of P(VDF-TrFE) in 15ml of NMP, after ozonation treatment in an oil bath at 25°C, add 0.6g of chloromethylstyrene, stir evenly, vacuumize, and blow nitrogen, at 65 °C in an oil bath for 5 hours, distilled off the solvent under reduced pressure, and dried in vacuo to obtain P(VDF-TrFE) with an active benzyl group on the molecular chain.

[0026] Dissolve 0.85g of the above-mentioned chemically modified P(VDF-TrFE) and 0.15g of copper phthalocyanine oligomer in 7.5ml of DMF, then add 0.35ml of triethylamine, protect with nitrogen, stir evenly, and react in an oil bath at 65°C After 18 hours, stop, purify, and obtain the product P(VDF-TrFE)-g-CuPc after vacuum drying;

[0027] When preparing a composite film, weigh a certain amount of P(VDF-TrFE)-g-CuPc into a small beaker containing DMF, ultrasonically disperse for 4 hours, and drop the uniformly dispersed solution on a clean glass slide to form a thin film Adhesive to glass slides. The glass sli...

example 2

[0029] Except that the amount of P(VDF-TrFE) was 2.0 g, the grafting process was carried out in an oil bath at 50° C. for 20 hours, and the remaining contents were the same as in Example 1.

example 3

[0031]Dissolve 1.2g of P(VDF-TrFE-CFE) in 20ml of NMP, ozonize it in an oil bath at 25°C, add 0.5g of chloromethylstyrene, stir evenly, vacuumize, and protect with nitrogen. Reaction in an oil bath at ℃ for 5 hours, distillation to remove volatile matter, washing and purification, and vacuum drying to obtain P(VDF-TrFE-CFE) with an active benzyl group on the molecular chain;

[0032] Dissolve 0.85g of the above-mentioned chemically modified P(VDF-TrFE-CFE) and 0.15g of copper phthalocyanine oligomer in 7.5ml of DMF, then add 0.35ml of triethylamine, protect with nitrogen, stir mechanically, and place in a 65°C oil bath The reaction was stopped after 18 hours, purified, and vacuum-dried to obtain the product P(VDF-TrFE-CFE)-g-CuPc;

[0033] When preparing a composite film, weigh a certain amount of P(VDF-TrFE-CFE)-g-CuPc and add it to a small beaker containing DMF, ultrasonically disperse it for 4 hours, and drop the uniformly dispersed solution on a clean glass slide to make i...

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Abstract

The invention relates to a method for preparing a high-dielectric constant composite film of a copper phthalocyanine oligomer/polymer, belonging to the field of high-dielectric constant polymer composite materials. The method comprises the following steps: chemically grafting the copper phthalocyanine oligomer to the polymer; and then, preparing the composite film of the copper phthalocyanine oligomer/polymer by a solution casting method. The polymer is any one of polymers with PVDF (polyvinylidene fluoride) group, polyurethane, epoxy resin, acrylic resin elastomer and poly-(p-chloromethyl styrene); and an active benzyl chloride group is required to be added to a PVDF-based polymer before grafting. The composite film prepared by the method provided by the invention is uniform and compact and has better flexibility; when the content of the copper phthalocyanine oligomer is 15%, the dielectric constant of the composite at room temperature and a frequency of 100Hz is higher than 400; the dielectric loss is lower than 0.24; and the property of the composite film is greatly higher than that of usual ferroelectric ceramic/polymer composite materials.

Description

technical field [0001] The invention discloses a method for preparing a copper phthalocyanine oligomer / polymer high dielectric constant composite film, which belongs to the field of high dielectric constant polymer composite materials. Background technique [0002] New dielectric materials with high dielectric constant have important application prospects in the fields of drivers, sensors, simulated muscles, medicine, new energy, electronic information, military reconnaissance and detection, and space technology, which has attracted Western countries, especially American scientists. of great interest. But so far, no one-component material has been found that has a sufficiently high dielectric constant, good mechanical properties, processability, and low price. Although traditional polymer materials have many advantages, their dielectric constant is too small (<10); while ceramic materials, although their dielectric constant is high, are very brittle and difficult to proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L27/16C08L75/04C08L63/00C08L33/00C08L25/18C08K5/3467
Inventor 王经文李淑琴
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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