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A preparation method of graphene/nanofiber hybrid gel film with light-to-heat conversion function

A photothermal conversion and nanofiber technology is applied in the field of preparation of graphene/nanofiber hybrid gel film, which can solve the problems of low evaporation rate and photothermal conversion efficiency, achieve good photothermal conversion efficiency, and improve photothermal conversion efficiency. Conversion efficiency, the effect of increasing the water evaporation rate

Active Publication Date: 2022-04-15
HARBIN INST OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of low evaporation rate and low photothermal conversion efficiency of existing photothermal conversion materials in the seawater desalination process, and provides a method for preparing a graphene / nanofiber hybrid gel film with photothermal conversion function

Method used

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  • A preparation method of graphene/nanofiber hybrid gel film with light-to-heat conversion function
  • A preparation method of graphene/nanofiber hybrid gel film with light-to-heat conversion function
  • A preparation method of graphene/nanofiber hybrid gel film with light-to-heat conversion function

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specific Embodiment approach 1

[0027] Specific embodiment one: the preparation method of a kind of graphene / nanofiber hybrid gel film with photothermal conversion function in this embodiment is carried out according to the following steps:

[0028] One, the preparation of gel fiber:

[0029] Under the conditions of temperature 80℃~90℃ and stirring speed 100rpm~300rpm, dissolve cellulose acetate and polymethacrylic acid in N,N-dimethylformamide, stir for 48h~72h to obtain spinning solution , under the conditions of a high-voltage electric field of 15kV-17kV, a spinning distance of 20cm-30cm, and a syringe pump advancing speed of 1mL / h-2mL / h, the spinning solution is spun by a single-axis electrospinning device, and the spinning The time is 8h to 24h, and then the gel fiber is obtained by using the flat-plate collecting method;

[0030] The quality of the cellulose acetate and the volume of N,N-dimethylformamide are (0.5~1)g:8.5mL; the quality of the polymethacrylic acid and the volume of N,N-dimethylformami...

specific Embodiment approach 2

[0041] Specific embodiment two: the difference between this embodiment and specific embodiment two is: the mixed acid solution described in step two is a mixture of phosphoric acid and concentrated sulfuric acid; the volume ratio of described phosphoric acid and concentrated sulfuric acid is 1: (7~9) ; The mass percentage of the phosphoric acid is ≥ 85%; the mass percentage of the concentrated sulfuric acid is 95% to 98%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0042] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step one, under the condition that the temperature is 80°C-85°C and the stirring speed is 100rpm-200rpm, cellulose acetate and polymethacrylic acid are mixed Dissolve in N,N-dimethylformamide, stir for 48h-60h to obtain spinning solution. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a graphene / nanofiber hybrid gel film with light-to-heat conversion function, which relates to a preparation method of the graphene / nanofiber hybrid gel film. The invention aims to solve the problems of low evaporation speed and low photothermal conversion efficiency of existing photothermal conversion materials in the seawater desalination process. Preparation method: 1. preparation of gel fiber; 2. preparation of graphene oxide sheet; 3. preparation of hybrid gel film. The invention is used for the preparation of the graphene / nanofiber hybrid gel film with light-to-heat conversion function.

Description

technical field [0001] The invention relates to a preparation method of a graphene / nano fiber hybrid gel film. Background technique [0002] With the rapid development of the world economy and technology, it has led to global climate change and serious shortage of water resources. According to the World Health Organization report "Progress in drinking water, sanitation and hygiene (2017)", in 2015, 844 million people still lacked basic drinking water services, and 159 million people were directly drinking from surface water and draw water from it. Over the past few decades, desalination using reverse osmosis technology has become a common technique for obtaining pure water from seawater. However, the filtration and backwashing processes consume large amounts of energy, adding to the cost of water treatment. In recent years, the direct use of solar energy for seawater desalination technology has gradually attracted the attention of scientific researchers and technology com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J9/28C08L1/12C08L33/02C08K7/00C08K3/04
CPCC08J5/18C08J9/28C08J2301/12C08J2433/02C08K7/00C08K3/042
Inventor 马军藏琳琳
Owner HARBIN INST OF TECH
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