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A preparation method of biochar/polymer composite film applied to solar water evaporation

A technology of biochar and polymer, which is applied in the field of composite film preparation, can solve the problem that the photothermal conversion efficiency and cost-effectiveness of photothermal evaporation elements cannot be balanced, and achieve the effect of excellent photothermal water evaporation efficiency and excellent photothermal performance

Active Publication Date: 2020-07-31
HEILONGJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problem that the light-to-heat conversion efficiency and cost-effectiveness of the existing light-to-heat evaporation elements cannot be balanced, and provides a preparation method of a biochar / polymer composite film applied to solar water evaporation

Method used

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  • A preparation method of biochar/polymer composite film applied to solar water evaporation
  • A preparation method of biochar/polymer composite film applied to solar water evaporation
  • A preparation method of biochar/polymer composite film applied to solar water evaporation

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specific Embodiment approach 1

[0015] Embodiment 1: This embodiment is a method for preparing a biochar / polymer composite film applied to solar water evaporation, specifically according to the following steps:

[0016] 1. Preparation of catkin biochar: Wash catkins with deionized water to remove seeds, then dry to obtain seeded catkins; put the seeded catkins into a beaker, add KOH solution with a concentration of 1moL / L to 4moL / L , ultrasonic for 30min~60min, then let stand and soak for 12h~24h, then pour it into a Buchner funnel with filter paper for solid-liquid separation, and transfer the part left in the Buchner funnel to a nickel crucible, at a temperature of 80℃~ Dry in an oven at 90°C; place the dried sample in a nitrogen muffle furnace at a heating rate of 3°C / min to 5°C / min, and keep the temperature at 550°C to 750°C for 2h to 2.5h. Cool to room temperature, take it out and put it into a beaker, then add a hydrochloric acid solution with a concentration of 1moL / L until no bubbles are generated, t...

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass fraction of the concentrated sulfuric acid described in step two is 98%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass fraction of concentrated nitric acid described in step two is 68%. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a biochar / polymer composite film applied to solar water evaporation, and relates to a preparation method of a composite film applied to solar water evaporation. The method solves the technical problem that the photo-thermal conversion efficiency and the cost benefit of the conventional photo-thermal evaporation element cannot be balanced. The methodcomprises the following steps: 1, preparing catkin biochar; 2, preparing acidified catkin biochar; 3, preparing a biochar / polymer mixed solution; and 4, preparing the biochar / polymer composite film.The method prepares a double-layer composite film having an inner porous hollow structure and carrying hydroxyl, amino and carboxyl functional groups on the surface; and the biochar / polymer compositefilm has a hydrophilic group on the surface, has excellent photo-thermal properties, can efficiently convert solar energy into heat energy, and facilitates solar absorption for water evaporation.

Description

technical field [0001] The invention relates to a preparation method of a composite membrane applied to solar water evaporation. Background technique [0002] As the most abundant renewable resource on earth, solar energy can be converted into heat energy, which has been the focus of research on seawater desalination in recent years. The traditional solar water evaporation technology usually uses light-absorbing materials to heat the water as a whole, resulting in large heat loss and low light-to-heat conversion efficiency. At present, plasmonic nanomaterials, graphene oxide, carbon nanotube-based materials, biomimetic materials, and polymer hydrogel materials are used as new photothermal evaporation materials, focusing on absorbing solar energy and converting it into heat only at the interface between water and the evaporator Evaporating water can effectively avoid heat loss and further improve the efficiency of steam generation. However, the light-to-heat conversion effi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/06C08F2/44C08K9/02C08K3/04C08J5/18
CPCC08F2/44C08F120/06C08J5/18C08J2333/02C08K3/04C08K9/02
Inventor 张艳红张少春藏琳琳孙治尧闫阳
Owner HEILONGJIANG UNIV
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