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Graphene-based super-hydrophobic fabric and preparation method thereof

A graphene-based, super-hydrophobic technology, applied in physical treatment, textile and papermaking, fiber treatment, etc., can solve the problems of time-consuming reaction, harsh reaction conditions, complex equipment and process, etc., and achieve the effect of improving adhesion

Active Publication Date: 2018-03-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems existing in the prior art such as harsh reaction conditions of graphene-based superhydrophobic materials, time-consuming reaction, complicated equipment and process, etc., and provides a graphene-based superhydrophobic fabric with simple method, high efficiency and excellent performance and its Preparation

Method used

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  • Graphene-based super-hydrophobic fabric and preparation method thereof
  • Graphene-based super-hydrophobic fabric and preparation method thereof
  • Graphene-based super-hydrophobic fabric and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Disperse 5mL of 3‐mercaptopropyltriethoxysilane in 100mL of deionized water, adjust its pH value to 4‐5 with hydrochloric acid solution (mass fraction: 37wt%), then add 70mL of graphene oxide solution (concentration 3.0 mg / mL), stirred thoroughly, and heated to 100°C for 4 hours, finally centrifuged at 6000r / min for 20 minutes, washed with ethanol for 3 times, and dried in an oven at 80°C for 2 hours to obtain a surface containing S‐H groups modified graphene oxide.

[0028] At room temperature, the modified graphene oxide and vinyl-terminated polydimethylsiloxane (molecular weight is 7000) that mass ratio is 0.25 are dispersed in the acetone of 30g (the mass concentration that modified graphene oxide accounts for mixed solution is 0.75wt%, vinyl-terminated polydimethylsiloxane accounts for 3wt% mass concentration of the mixed solution) and stirs evenly, then adds crosslinking agent trimethylolpropane trimethacrylate and photoinitiator 2-hydroxyl- 2-methyl-1-phenyl-1-a...

Embodiment 2

[0033] Disperse 5mL of 3‐mercaptopropylmethyldiethoxysilane in 100mL of deionized water, adjust its pH value to 4‐5 with hydrochloric acid solution (37wt%), and then add 60mL of graphene oxide solution (Concentration: 3.5mg / mL) Stir well, and heat to 80°C for 6h, finally centrifuge at 7000r / min for 15min, wash with ethanol for 3 times, dry in an oven at 80°C for 2h, get the surface containing S‐ H-based modified graphene oxide.

[0034] At room temperature, the modified graphene oxide and vinyl-terminated polydimethylsiloxane (molecular weight is 5000) that mass ratio is 0.5 are dispersed in the acetone of 30g (the mass concentration that modified graphene oxide accounts for mixed solution is 1.5wt%, vinyl-terminated polydimethylsiloxane accounts for 1wt% mass concentration of the mixed solution) and stirs evenly, then adds crosslinking agent trimethylolpropane triacrylate and photoinitiator 1‐hydroxycyclohexylbenzene base ketone, and continued to stir to form a uniform solut...

Embodiment 3

[0038] Disperse 5mL of 3‐mercaptopropyltrimethoxysilane in 100mL of deionized water, adjust its pH value to 4‐5 with hydrochloric acid solution (mass fraction: 37wt%), then add 52.5mL of graphene oxide solution (concentration 4.0 mg / mL) and stirred thoroughly, and heated to 90°C for 5h reaction, finally centrifuged at 8000r / min for 10min, washed with ethanol for 5 times, dried in an oven at 80°C for 2h, and obtained surface S‐H group-containing modified graphene oxide.

[0039] At room temperature, the modified graphene oxide and vinyl-terminated polydimethylsiloxane (molecular weight is 4000) with a mass ratio of 0.3 are dispersed in 30 g of butanone (modified graphene oxide accounts for the mass concentration of the mixed solution 0.9wt%, vinyl-terminated polydimethylsiloxane accounts for 3wt% mass concentration of the mixed solution) and stirs evenly, then adds crosslinking agent pentaerythritol triacrylate and photoinitiator 2‐methyl‐1‐(4 ‐Methylthiophenyl)‐2‐morpholine‐1...

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Abstract

The invention discloses graphene-based super-hydrophobic fabric and a preparation method thereof. The preparation method comprises the following steps: firstly, performing surface modification on graphene oxide by a silane coupling agent containing an S-H group to obtain modified graphene oxide with the surface containing the S-H group; secondly, dispersing the modified graphene oxide and terminated vinyl polydimethylsiloxane into a solvent at room temperature, stirring uniformly, adding a crosslinking agent and a photoinitiator, and continuously stirring to form a uniform solution; finally, soaking the fabric in the prepared mixed solution by a dip-coating method, taking out, performing ultraviolet irradiation to enable the S-H group on the modified graphene oxide attached to the fabric and C=C double bond on the terminated vinyl polydimethylsiloxane to perform mercapto ene reaction to finally prepare the graphene-based super-hydrophobic fabric. The method is simple and convenient andthe surface water drop static contact angle of the prepared fabric is more than 150 degrees; meanwhile, the fabric has excellent heat resistance and chemical resistance.

Description

technical field [0001] The invention relates to a superhydrophobic material, in particular to a graphene-based superhydrophobic fabric and a preparation method thereof. Background technique [0002] Inspired by the special surface structures of various animals and plants in nature, people have designed and invented superhydrophobic materials. Generally, the static contact angle between the surface of a superhydrophobic material and a water droplet is greater than 150°. Due to their broad application prospects in self-cleaning, oil-water separation, marine drag reduction, and anti-icing, superhydrophobic materials have attracted great attention. [0003] Since the discovery of graphene's hydrophobicity, graphene-based superhydrophobic materials have attracted extensive attention from researchers. For example, Li et al. reduced the mixed solution of graphene oxide and polyvinylidene fluoride by solvothermal reduction method, and prepared graphene / polymer airgel with superhyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/10D06M10/06D06M10/08D06M14/32D06M14/28D06M14/34D06M14/30D06M14/22
Inventor 李红强廖晓凤曾幸荣赖学军张林
Owner SOUTH CHINA UNIV OF TECH
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