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Preparation method of graphene-modified hydrophobic oil-absorbing sponge

An oil-absorbing sponge and graphene technology, applied in the field of preparation of graphene hydrophobic oil-absorbing sponge, can solve problems such as unreported graphene materials, and achieve the effects of large porosity, good resilience and compressibility, and high oil absorption performance.

Inactive Publication Date: 2018-12-14
JINAN JIAXING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies involving graphene materials with both superhydrophobic and superoil-absorbing properties have not been reported so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of graphene hydrophobic oil-absorbing sponge, characterized in that it comprises the following steps:

[0017] (1) Preparation of graphene oxide suspension: adding graphite oxide into water, ultrasonically dispersing to obtain graphene oxide suspension, the concentration of graphene oxide suspension is 2mg / ml;

[0018] (2) Wash the polyurethane sponge ultrasonically with ethanol and pure water for 3 times, and obtain a clean polyurethane sponge after drying;

[0019] (3) Place the graphene oxide suspension obtained in step (2) in a single-necked flask, add hydrazine hydrate reducing agent and clean polyurethane sponge to the graphene oxide suspension, and place it in a microwave chemical reactor with a power of 50% (325W), connect the condenser reflux tube, microwave heating reduction reaction for 30min; the mass ratio of graphene oxide suspension to hydrazine hydrate is 30:1

[0020] (4) Put the polyurethane sponge after the heating reaction in step (3) in...

Embodiment 2

[0023] A preparation method of graphene hydrophobic oil-absorbing sponge, characterized in that it comprises the following steps:

[0024] (1) Preparation of graphene oxide suspension: adding graphite oxide to ethanol, ultrasonically dispersing to obtain graphene oxide suspension, the concentration of graphene oxide suspension is 10mg / ml;

[0025] (2) Wash the polyurethane sponge with ethanol and pure water ultrasonically for 5 times, and obtain a clean polyurethane sponge after drying;

[0026] (3) Place the graphene oxide suspension obtained in step (2) in a single-necked flask, add hydrazine hydrate reducing agent and clean polyurethane sponge to the graphene oxide suspension, and place it in a microwave chemical reactor with a power of 50% (325W), connect the condenser reflux tube, microwave heating reduction reaction for 60min; the mass ratio of graphene oxide suspension to hydrazine hydrate is 30:6

[0027] (4) Place the polyurethane sponge after the heating reaction in step (3)...

Embodiment 3

[0030] A preparation method of graphene hydrophobic oil-absorbing sponge, characterized in that it comprises the following steps:

[0031] (1) Preparation of graphene oxide suspension: adding graphite oxide to acetone, ultrasonically dispersing to obtain graphene oxide suspension, the concentration of graphene oxide suspension is 4mg / ml;

[0032] (2) Wash the polyurethane sponge ultrasonically with ethanol and pure water for 3 times, and obtain a clean polyurethane sponge after drying;

[0033] (3) Place the graphene oxide suspension obtained in step (2) in a single-necked flask, add hydrazine hydrate reducing agent and clean polyurethane sponge to the graphene oxide suspension, and place it in a microwave chemical reactor with a power of 50% (325W), connect the condenser reflux tube, microwave heating reduction reaction for 35min; the mass ratio of graphene oxide suspension to hydrazine hydrate is 30:3

[0034] (4) Place the polyurethane sponge after the heating reaction in step (3) ...

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Abstract

The invention provides a preparation method of graphene-modified hydrophobic oil-absorbing sponge. The preparation method comprises the following steps: preparing a graphene oxide suspension; ultrasonically washing polyurethane sponge by using ethanol and pure water respectively; adding a hydrazine hydrate reducing agent and the clean polyurethane sponge into the graphene oxide suspension, placingin a microwave chemical reactor, and performing a reduction reaction for 30-60min under a microwave heating condition; ultrasonically dispersing the polyurethane sponge in an ultrasonic cleaner, andwashing away excess graphene on the surface of the polyurethane sponge by using pure water; drying the polyurethane sponge cleaned in the step (4) in a drying oven with the temperature of 80-120 DEG C, and immersing the dried polyurethane sponge in a dimethylsiloxane solution, performing an immersion reaction for 4-7 hours, squeezing residual liquid in gaps of the polyurethane sponge, and drying in the drying oven with the temperature of 80 DEG C to obtain the graphene-modified hydrophobic oil-absorbing sponge. By the preparation method of the graphene-modified hydrophobic oil-absorbing sponge, the gap ratio is large, the oil-absorbing performance is high and the rebounding compressibility is good.

Description

Technical field [0001] The invention belongs to the technical field of composite material preparation, and specifically relates to a preparation method of graphene hydrophobic oil-absorbing sponge. Background technique [0002] Recently, it has super hydrophobic (water contact angle> 150°) and super lipophilic (oil contact angle <5°) solid surfaces have attracted close attention and research interest due to their ability to selectively adsorb oil or organic solvents without completely absorbing water. Based on this, many efficient adsorption materials have been extensively studied, including inorganic nanowire films, microporous polymers, carbon nanotubes, etc. However, the production cost of these materials is high and the process is complicated, making it difficult to mass produce for practical applications. In addition, more research has recently turned its attention to finding solutions to serious global water pollution problems caused by oil spills and chemical spills...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08L75/04
CPCC08J9/40C08J2375/04
Inventor 张成如
Owner JINAN JIAXING TECH
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