Preparation method of graphene/nanofiber hybrid gel membrane with photo-thermal conversion function

A nanofiber, hybrid gel technology, applied in the field of graphene/nanofiber hybrid gel film preparation, can solve the problems of low evaporation speed and photothermal conversion efficiency, achieve good photothermal conversion efficiency, improve water Evaporation speed and the effect of improving photothermal conversion efficiency

Active Publication Date: 2019-07-12
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

Method used

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  • Preparation method of graphene/nanofiber hybrid gel membrane with photo-thermal conversion function
  • Preparation method of graphene/nanofiber hybrid gel membrane with photo-thermal conversion function
  • Preparation method of graphene/nanofiber hybrid gel membrane with photo-thermal conversion function

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Experimental program
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Example Embodiment

[0027] Specific implementation mode 1: In this embodiment, a method for preparing a graphene / nanofiber hybrid gel film with photothermal conversion function is performed according to the following steps:

[0028] 1. Preparation of gel fiber:

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

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

[0031] ...

Example Embodiment

[0041] Specific embodiment two: this embodiment is different from the specific embodiment two in that: the mixed acid solution in step two is a mixture of phosphoric acid and concentrated sulfuric acid; the volume ratio of 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 the first embodiment.

Example Embodiment

[0042] Specific embodiment three: This embodiment is different from specific embodiment one or two in that in step one, under the conditions of a temperature of 80℃~85℃ and a stirring speed of 100rpm~200rpm, cellulose acetate and polymethacrylic acid Dissolve in N,N-dimethylformamide and stir for 48h-60h to obtain spinning solution. Others are the same as the first or second embodiment.

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Abstract

A preparation method of a graphene/nanofiber hybrid gel membrane with a photo-thermal conversion function relates to a preparation method of a graphene/nanofiber hybrid gel membrane. The invention aims to solve the problem that existing photo-thermal conversion materials have low evaporation velocity and low photo-thermal conversion efficiency during the seawater desalination process. The preparation method comprises the following steps: 1, preparation of gel fiber; 2, preparation of graphene oxide sheets; and 3, preparation of the hybrid gel membrane. The preparation method is used for preparation of the graphene/nanofiber hybrid gel membrane with the photo-thermal 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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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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