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Method for preparing anti-aging high-transparent polyurethane and graphene oxide composite microporous membrane material

A graphene composite and polyurethane technology is applied in the field of preparation of aging-resistant and high-permeability microporous membrane materials, and achieves the effects of simple operation method, good permeability, and improved dispersibility and stability.

Active Publication Date: 2012-07-25
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyurethane microporous membrane materials, like other polymer materials, are easily affected by external environments such as light, heat, water, air and oxygen during processing, storage and use, resulting in aging and degradation of polymers, resulting in discoloration and hair loss of products. Brittle, the mechanical properties are reduced, so that it loses its use value
In addition, the polyurethane microporous membrane material has poor water and air permeability, both of which greatly limit its application.
Since the industrialization of polyurethane, researchers have been committed to the research of anti-aging polyurethane materials, but due to the structure of polyurethane materials is varied and the degradation process is complicated, the research progress is slow
As for improving the permeability of polyurethane microporous membranes, researchers have done a lot of work and achieved certain results, but how to improve the permeability of PU microporous membranes without reducing the mechanical properties of PU microporous membranes not significant

Method used

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  • Method for preparing anti-aging high-transparent polyurethane and graphene oxide composite microporous membrane material
  • Method for preparing anti-aging high-transparent polyurethane and graphene oxide composite microporous membrane material
  • Method for preparing anti-aging high-transparent polyurethane and graphene oxide composite microporous membrane material

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Experimental program
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Effect test

Embodiment 1

[0031] The first step: preparation of graphene oxide dispersion

[0032] Weigh 0.501g of natural graphite powder and place it in a container, add 100ml of concentrated H with a volume ratio of 1:1 2 SO 4 / Concentrated H 3 PO 4 Mix acid, then add 2.002g potassium permanganate, stir for 15min in ice bath, move the container into a warm water bath at 25°C and continue to stir for 0.5h, add 200ml of deionized water, and continue until the temperature of the reaction solution rises naturally to 95°C Stir and react for 1 hour, remove the stirrer and warm water bath, add 200ml of deionized water to dilute the reaction solution, add 20ml of 30% hydrogen peroxide after adding deionized water for 0.5 hours, and react for 0.5 hours, then use 5% HCl solution to centrifuge and wash to the top No SO in supernatant 4 2- , fully washed with deionized water to pH = 7, and then moved the solid into a 60°C oven for 48 hours of vacuum drying, and ground the dried product to obtain powdered ...

Embodiment 2

[0039] The first step: preparation of graphene oxide dispersion

[0040] Weigh 2.002g of natural graphite powder and place it in a container, add 100ml of concentrated H with a volume ratio of 9:1 2 SO 4 / Concentrated H 3 PO 4 Mix acid, then add 12.012g of potassium permanganate, stir for 30min under ice bath conditions, move the container into a warm water bath at 35°C and continue stirring for 1h, add 200ml of deionized water when stirring for 0.5h, and wait for the temperature of the reaction solution to rise naturally to Continue to stir and react for 3 hours at 95°C, remove the stirrer and warm water bath, add 300ml of deionized water to dilute the reaction solution, add 35ml of 30% hydrogen peroxide after adding deionized water for 0.5h, react for 1h, and use 5% HCl solution Wash by centrifugation until there is no SO in the supernatant 4 2- , fully washed with deionized water to pH = 7, and then moved the solid into a 60°C oven for 48 hours of vacuum drying, and g...

Embodiment 3

[0056] The first step: preparation of graphene oxide dispersion

[0057] Weigh 3.000g of natural graphite powder and place it in a container, add 100ml of concentrated H with a volume ratio of 4:1 2 SO 4 / Concentrated H 3 PO 4 Mix acid, then add 17.785 potassium permanganate, stir for 45 minutes under ice bath conditions, move the container into a warm water bath at 45°C and continue stirring for 2.5 hours, add 200ml of deionized water when stirring for 0.5 hours, and wait for the temperature of the reaction solution to rise naturally to Continue to stir and react at 95°C for 5 hours, remove the stirrer and warm water bath, add 400ml deionized water to dilute the reaction solution, add 50ml 30% hydrogen peroxide after adding deionized water for 0.5h, react for 2 hours, and use 5% HCl solution Wash by centrifugation until there is no SO in the supernatant 4 2- , fully washed with deionized water to pH = 7, and then moved the solid into a 60°C oven for 48 hours of vacuum d...

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Abstract

The invention discloses a method for preparing an anti-aging high-transparent polyurethane and graphene oxide composite microporous membrane material. The method includes: preparing graphene oxide as filler, and uniformly mixing the graphene oxide into polyurethane emulsion by the aid of high dispersion wettability of flatting agent. Using the method can improve dispersibility and stability of the graphene oxide in the polyurethane emulsion, enhance the bonding force between the graphene oxide and an interface of a polyurethane matrix, and obtain the anti-aging high-transparent polyurethane and graphene oxide composite microporous membrane material. The method is simple and environment-friendly, the anti-aging performance and transparency of the composite microporous membrane material areevidently improved, and integral strength of the material is basically unaffected.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane / graphene oxide composite microporous membrane material, in particular to a preparation method of a polyurethane-graphene oxide composite microporous membrane material with anti-aging and high permeability. Background technique [0002] Polyurethane (PU) microporous membrane materials are widely used in construction, textile, synthetic leather, petrochemical and other fields due to their light weight, excellent corrosion resistance and wear resistance, and good mechanical properties. However, polyurethane microporous membrane materials, like other polymer materials, are easily affected by external environments such as light, heat, water, air, and oxygen during processing, storage, and use, resulting in aging and degradation of polymers, resulting in discoloration and hair loss of products. Brittle, the mechanical properties are reduced, so that it loses its use value. In addition, the poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L75/04C08L83/04C08K9/02C08K3/04
Inventor 王全杰王乾乾王延青王萌萌
Owner YANTAI UNIV
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