A kind of reduced graphene oxide-poly-p-phenylenediamine/tpu composite film

A poly-p-phenylenediamine, composite film technology, applied in the fields of carbon compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of high surface resistance, general dispersion, electrostatic charge accumulation, etc., to improve thermal conductivity, preparation The method is scientific and reasonable, and the effect of improving compatibility

Active Publication Date: 2019-02-22
福建宸琦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like other polymer materials, polyurethane materials have low thermal conductivity and high surface resistance, and are prone to electrostatic charge accumulation during use, which is an important hidden danger of fire, explosion and other safety accidents
[0005] Although graphene oxide (GO) has oxygen-containing functional groups such as carboxyl, hydroxyl, and epoxy groups on the surface, it can be peeled off and uniformly dispersed in water and DMF after ultrasonic treatment, but its dispersion is average. After standing for a while, GO will deposit at the bottom of the DMF
In the current literature at home and abroad, the antistatic treatment of TPU is mainly by adding a large amount of carbon black and metal oxides, while there are few reports on the growth of nano-conductive polymers by in-situ polymerization on graphene.

Method used

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  • A kind of reduced graphene oxide-poly-p-phenylenediamine/tpu composite film
  • A kind of reduced graphene oxide-poly-p-phenylenediamine/tpu composite film
  • A kind of reduced graphene oxide-poly-p-phenylenediamine/tpu composite film

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preparation example Construction

[0029] A preparation method of reduced graphene oxide-poly-p-phenylenediamine / TPU composite film, the specific steps are as follows:

[0030] 1) After cold treatment of graphite, put it in a low temperature reaction bath, slowly add concentrated sulfuric acid while stirring, and add potassium permanganate in batches within 3 hours, and then heat to 50 ° C after low temperature reaction at 4 ° C for 0.5 hours, Continue to react for 12h, then add deionized water, stir for 15min, and dropwise add 30% hydrogen peroxide, pickle and water until neutral, freeze-dry to obtain lamellar graphene oxide;

[0031] 2) Ultrasonic disperse graphene oxide in deionized water, add p-phenylenediamine monomer and ammonium persulfate initiator to the low temperature reaction bath, conduct low temperature polymerization reaction below 4 °C for 24 hours, then stand for 2 hours, use deionized water and Washed with absolute ethanol until colorless, freeze-dried to obtain GO-PPDA powder; wherein, the ma...

Embodiment 1

[0040] 1) Improved Hummers method to prepare graphene oxide: firstly, 1 g of graphite was cold-treated, then 45 mL of 98% concentrated sulfuric acid and 5 mL of concentrated phosphoric acid were slowly added to the low-temperature reaction bath, stirred and mixed, and 7 g of potassium permanganate was divided into three parts within 3 hours. The mixed acid was added in batches, and the reaction system was moved to a water bath and heated to 50°C after a low temperature reaction for half an hour. After the reaction was continued for 12 hours, 1000 mL of deionized water was added to obtain a red-brown graphite suspension. After stirring for 15 minutes, 30% hydrogen peroxide was added dropwise. , obtain bright yellow graphite diluent, finally carry out pickling with 3% hydrochloric acid solution, and then wash to neutrality to obtain graphene oxide gel, and graphene oxide gel is subjected to freeze-drying treatment to obtain fluffy graphene oxide ( GO) solid;

[0041] 2) Synthesi...

Embodiment 2

[0046] In step 4), 0.038 g of RGO-PPDA nano-powder was added, and other conditions and parameters were the same as those in Example 1, and finally a 0.5% RGO-PPDA / TPU composite film was obtained.

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Abstract

The invention discloses an RGO-PPDA (reduction graphene oxide-polyp phenylenediamine) / TPU (thermoplastic polyurethane) composite thin film. The RGO-PPDA / TPU composite thin film is prepared by the following steps: under the initiation action of ammonium persulfate, reducing and polymerizing PPDA on laminar GO (graphene oxide), so as to obtain GO-PPDA nanometer powder; reducing by hydrazine hydrate, so as to obtain RGO-PPDA nanometer powder; finally, utilizing a solution coating and film forming technology to prepare the RGO-PPDA / TPU composite thin film. The RGO-PPDA / TPU composite thin film has the advantages that by adopting a laminar structure, the serious agglomeration of graphene on a polymer is avoided; the compatibility of the GO and DMF (dimethyl formamide) is poor, and after the PPDA is reduced and polymerized on the GO in situ, the PPDA can be uniformly dispersed into the DMF, and the good dispersing in a TPU matrix in a solution coating and film filming process is realized; the graphene and the PPDA have excellent electric and heat conductivity, and a channel through which micromolecular matters pass through the composite thin film is greatly extended, so that the purpose of improving blocking, and electric and heat conductivity of the TPU thin film is realized.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material preparation, in particular to a reduced graphene oxide-poly-p-phenylenediamine / TPU composite film. Background technique [0002] Graphene is composed of a single layer of Sp 2 Hybrid carbon atoms are tightly packed into a two-dimensional honeycomb lattice structure carbon material. The special single atomic layer structure of graphene determines its unique physical properties, such as high strength, high modulus, high thermal conductivity, high electron mobility, high specific surface area and high barrier properties. Graphene is one of the materials with the highest thermal conductivity among the known materials, with a thermal conductivity of up to 5300W / (m·K). The unique electronic and physical properties exhibited by graphene make it have important application prospects in polymer composites. [0003] P-phenylenediamine is a reducible aromatic amine that is easily oxidize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L79/02C08K3/04C08J5/18C08G73/02C01B32/198
CPCC08G73/0266C08J5/18C08J2375/04C08J2479/02C08K2201/011C08L75/04C08L2201/04C08L2203/16C08L79/02C08K3/04
Inventor 郑玉婴苏义军邓中文
Owner 福建宸琦新材料科技有限公司
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