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

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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