Reduced graphene oxide composite material

a graphene oxide and composite material technology, applied in the field of composite materials, can solve the problems of poor absorption capacity, laborious preparation process, environmental contamination problems, etc., and achieve the effect of low cost and high oil absorption capacity

Inactive Publication Date: 2016-05-05
NAT TAIWAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented technology describes an improved type of carbon foam that can effectively remove greasy liquids from water surfaces without causing environmental damage during disposal operations. It has excellent properties like strong adhesion with different types of substances on it's surface compared to other similar porous carbons made up mostly of polyacrylic acid polymers.

Problems solved by technology

This patented technical problem in this patent relates to finding ways to efficiently treat wastewater containing oily substances from water sources without causing harmful effects on both humans and animals living around them. Current methods involve expensive equipment like filters with limited effectiveness due to factors like impurities present during processing steps, difficulty separating oil-spilled material into different components, and difficulties associated with disposing of these separated parts after treatment.

Method used

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Embodiment Construction

[0025]The preparation method disclosed in the present invention uses fibrous materials (such as natural or synthetic fabric / cloths) or porous materials (such as the natural or synthetic sponge) as the substrate to prepare the PTMOS-treated, PEI-functionalized RGO film coated on and / or into the substrate. The material of the porous substrate includes natural or synthetic materials and fibrous materials with large numbers of pores with different pore volumes.

[0026]The RGO has not only hydrophobic surfaces and a large surface area but also it has a high mechanical strength, and is suitable to be used for absorbing oil. However, the smooth morphology of the RGO sheets decreases their oil absorption efficiency. Though functional graphene / polypyrrole foams have been used for removing oils, it is difficult to remove the oil from the RGO surface as a result of their strong absorption. Burning these materials absorbed oil has been suggested, but it raises safety and ecological concerns.

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Abstract

The preparation of functionalized reduced graphene oxide (RGO) composite materials on various fibrous substrates has been proposed. The functionalized RGO composite fibrous materials absorb various types of oils efficiently within 20 seconds, with great absorption capacity. The maximum absorption capacity values for bicycle chain oil and used motorcycle engine oil are 880.8% and 839.1%, respectively. Simply squeezing the functionalized RGO composite materials allows the removal of the absorbed oil for reuse. The functionalized RGO composite fibrous materials have been used to efficiently separate oil/water mixture through a flowing system. Having the advantages of faster absorption rate, reusability, and low-costs, the functionalized RGO composite fibrous materials holds great potential as a superabsorbent for efficient removal and recovery of oil spills, and for separation of water/oil mixtures.

Description

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Claims

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Application Information

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Owner NAT TAIWAN UNIV
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