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Perforated graphene aerogel moisture absorption fiber as well as preparation method and application thereof

A graphene aerogel, graphene hydrogel technology, applied in the direction of carbon fiber, fiber processing, fiber chemical characteristics, etc., can solve the problems of inability to mass production, complex processing technology of microfluidic air water intake device, etc. Excellent electric heating, mild reaction conditions and simple preparation process

Active Publication Date: 2021-08-06
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microfluidic air water intake device has complex processing technology and cannot be mass-produced

Method used

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  • Perforated graphene aerogel moisture absorption fiber as well as preparation method and application thereof
  • Perforated graphene aerogel moisture absorption fiber as well as preparation method and application thereof
  • Perforated graphene aerogel moisture absorption fiber as well as preparation method and application thereof

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preparation example Construction

[0050] The present invention also provides a preparation method of the perforated graphene airgel hygroscopic fiber, comprising the following steps:

[0051] Provide perforated graphene hydrogel fibers or perforated graphene airgel fibers; and

[0052] Fill the perforated graphene hydrogel fiber or perforated graphene airgel fiber with a moisture absorbent by means of solution filling, so that the moisture absorbent enters and fills the three-dimensional porous network structure of the gel fiber , after drying, the perforated graphene airgel hygroscopic fiber is obtained.

[0053] In the present invention, the perforated graphene hydrogel fiber is prepared from a perforated graphene oxide dispersion by a spinning method, and the perforated graphene airgel fiber is prepared from the perforated graphene water The gel fiber is obtained after drying. Among them, the perforated graphene oxide is obtained by etching the graphene oxide sheet by chemical etching, and the etchant use...

Embodiment 1

[0066] The present embodiment provides a kind of perforated graphene airgel hygroscopic fiber, and its preparation method comprises the following steps:

[0067] (1) Preparation of perforated graphene oxide: add aqueous hydrogen peroxide solution to the graphene oxide dispersion, and react at 100° C. for 30 min.

[0068] (2) Preparation of graphene airgel fiber: the perforated graphene oxide liquid crystal is spun into calcium chloride aqueous solution by wet spinning to obtain perforated graphene oxide hydrogel fiber, and then soaked in hydroiodic acid aqueous solution , followed by supercritical drying to obtain perforated graphene airgel fibers.

[0069] (3) Preparation of perforated graphene / hygroscopic material composite fiber: soak the perforated graphene airgel fiber in 7wt.% lithium chloride aqueous solution, let it stand at normal temperature and pressure for 10h, and put the lithium chloride aqueous solution The fibers were freeze-dried to obtain perforated graphene...

Embodiment 2

[0071] The present embodiment provides a kind of perforated graphene airgel hygroscopic fiber, and its preparation method comprises the following steps:

[0072] (1) Preparation of perforated graphene oxide: add aqueous hydrogen peroxide solution to the graphene oxide dispersion, and react at 100° C. for 1 h.

[0073](2) Preparation of graphene airgel fibers: the perforated graphene oxide liquid crystals were spun into hydrochloric acid / ascorbic acid mixed aqueous solution by wet spinning to obtain perforated graphene hydrogel fibers, and then the hydrogel fibers were subjected to ultra- Perforated graphene airgel fibers obtained by critical drying.

[0074] (3) Preparation of perforated graphene / hygroscopic material composite fiber: soak the perforated graphene airgel fiber in 5wt.% lithium chloride aqueous solution, let it stand at normal temperature and pressure for 15h, and put the lithium chloride aqueous solution The fibers are placed in a 100°C oven to obtain perforate...

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Abstract

The invention discloses perforated graphene aerogel moisture absorption fiber. The perforated graphene aerogel moisture absorption fiber comprises perforated graphene aerogel fiber and a moisture absorbent, wherein the perforated graphene aerogel fiber is a fiber material which is formed by overlapping perforated graphene sheets and has a three-dimensional porous network structure; and the moisture absorbent wraps the perforated graphene sheets and is embedded in and fills the three-dimensional porous network structure. The invention further discloses a preparation method and application of the perforated graphene aerogel moisture absorption fiber. The perforated graphene aerogel moisture absorption fiber has excellent flexibility, knittability, moisture absorption performance, electric heating performance, photo-thermal energy storage performance and the like, so that the perforated graphene aerogel moisture absorption fiber can be used for preparing moisture absorption and heat preservation devices, air water taking devices, intelligent response devices, moisture absorption and heat storage devices, moisture absorption and refrigeration devices, microwave absorption devices or flexible wearable devices.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a perforated graphene airgel hygroscopic fiber, its preparation method and its application in the fields of adsorption / absorption air water intake, moisture absorption energy storage, microwave absorption and the like. Background technique [0002] At present, many regions in the world are facing this serious fresh water shortage problem. Studies have shown that two-thirds of the world's population (4 billion people) suffer from fresh water shortages in a year, and 500 million people on the earth are facing severe water shortage problems throughout the year. To meet the water supply demand by building large-scale dams, pipeline transportation or water treatment plants and other large-scale infrastructure is by far the main means for most countries to solve the problem of water shortages, but in many remote areas where traditional freshwater resources are scarce, due to lack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M23/00D06M11/13D01F9/12D06M101/40
CPCD06M23/00D06M11/13D01F9/12D06M2101/40Y02A20/00
Inventor 张学同侯英来盛智芝
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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