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Blocking thermoplastic polyurethane (TPU)/functional graphite oxide composite film and preparation method thereof

A graphene composite and graphene technology, which is applied in the field of polymer composite film preparation, can solve problems such as limiting the application in the barrier field, and achieve the effects of a scientific and reasonable preparation method, strong operability, and simple process

Active Publication Date: 2014-08-27
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

Although TPU has so many excellent properties, water vapor and some small gas molecules can still easily penetrate through the TPU film, which limits its application in the barrier field.

Method used

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  • Blocking thermoplastic polyurethane (TPU)/functional graphite oxide composite film and preparation method thereof
  • Blocking thermoplastic polyurethane (TPU)/functional graphite oxide composite film and preparation method thereof
  • Blocking thermoplastic polyurethane (TPU)/functional graphite oxide composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take 10 g of TPU, dissolve it in 40 mL of DMF, and then place it in a blast drying oven at 90 °C to swell for 4 h; weigh 0.1 g of functional graphene oxide and pour it into a 100 mL beaker, then add 10 mL of DMF, at 100 Ultrasonic dispersion was performed in a W ultrasonic cleaner for 10 min, and then the dispersed functional graphene oxide solution was mixed with the swollen TPU solution evenly, and then ultrasonically dispersed in a 100 W ultrasonic cleaner for 1 h. Then mechanically stir in a mechanical mixer for 1 h, then pour the mixed pasty liquid into a small volumetric flask with a straw, and then pump out the air in the pasty liquid on a suction filter until there are no air bubbles in the volumetric flask. Place the glass plate on the film coating machine, and then use the film coating machine to coat a certain thickness of film on the glass plate, then place the glass plate in a vacuum drying oven at 60 °C, and then vacuumize it. After 30 min, open the vent v...

Embodiment 2

[0040] Take 20 g of TPU, dissolve it in 60 mL of DMF, and then place it in an air-dried oven at 80 °C to swell for 6 h; weigh 0.3 g of functional graphene oxide and pour it into a 100 mL beaker, then add 15 mL of DMF, Ultrasonic dispersion was performed in a 100 W ultrasonic cleaner for 20 min, and then the dispersed functional graphene oxide solution was mixed with the swollen TPU solution evenly, and then ultrasonically dispersed in a 100 W ultrasonic cleaner for 3 h. Then mechanically stir in a mechanical mixer for 1 h, then pour the mixed pasty liquid into a small volumetric flask with a straw, and then pump out the air in the pasty liquid on a suction filter until there are no air bubbles in the volumetric flask. Place the glass plate on the film coating machine, and then use the film coating machine to coat a film of a certain thickness on the glass plate, then place the glass plate in a vacuum drying oven at 70 °C, and then vacuumize it. After 20 min, open the vent valv...

Embodiment 3

[0042] Take 15 g of TPU, dissolve it in 50 mL of DMF, and then place it in a blast drying oven at 70 °C to swell for 8 h; weigh 0.5 g of functional graphene oxide and pour it into a 100 mL beaker, then add 30 mL of DMF, Ultrasonic dispersion was performed in a 100 W ultrasonic cleaner for 15 min, and then the dispersed functional graphene oxide solution and the swollen TPU solution were mixed evenly, and then ultrasonically dispersed in a 100 W ultrasonic cleaner for 2 h. Then mechanically stir in a mechanical mixer for 1 h, then pour the mixed pasty liquid into a small volumetric flask with a straw, and then pump out the air in the pasty liquid on a suction filter until there are no air bubbles in the volumetric flask. Place the glass plate on the film coating machine, and then use the film coating machine to coat a certain thickness of film on the glass plate, then place the glass plate in a vacuum drying oven at 80 °C, and then vacuumize it. After 10 min, open the vent valv...

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Abstract

The invention discloses a blocking thermoplastic polyurethane (TPU) / functional graphite oxide composite film and a preparation method thereof. The method comprises the following steps: firstly, preparing graphene oxide by adopting an improved hummers method, and then carrying out organic modification on the graphite oxide by using different fluorine ketone diisocyanate to obtain functional graphite oxide; finally, compositely building a film on a film coating machine by using the functional graphite oxide and TPU. By adopting the composite material film prepared by the method disclosed by the invention, the functional graphite oxide can be evenly dispersed into a TPU substrate as a good impermeable material, so that the composite film has good ability of blocking small molecule materials such as vapor, oxygen and the like, the barrier property is greatly enhanced, the mechanical property is also definitely improved, the film is good in transparency, and he blocking TPU / functional graphite oxide composite film can be widely applied to the fields such as food packaging and drug packaging encapsulation materials and the like. The blocking TPU / functional graphite oxide composite film is scientific and reasonable in preparation method, simple in process, and strong in maneuverability, and industrial production can be carried out on a large scale.

Description

technical field [0001] The invention belongs to the technical field of polymer composite film preparation, and in particular relates to a barrier TPU / functional graphene oxide composite film and a preparation method thereof. Background technique [0002] Barrier polymers have become increasingly important in food packaging, pharmaceutical packaging, industrial applications, and even in electronic devices, such as encapsulation materials for organic light-emitting displays (OLEDs). This advanced organic light-emitting display substrate material and surface encapsulation material require high barrier properties and transparency to ensure extended oxygen and water vapor permeation, thereby greatly extending the service life of OLEDs. [0003] Graphene, as a new type of carbon material, has attracted widespread attention due to its excellent mechanical properties and transparency, it is a single-layer material with a two-dimensional carbon skeleton, and it is also an outstanding...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K9/04C08K9/02C08K3/04C08J5/18
Inventor 郑玉婴樊志敏
Owner 福建宸琦新材料科技有限公司
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