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

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...

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.

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