Guangdong Ocean University

Jingyuan Guo

Zhang Hu

Sidong Li

Lefan Li

Chengpeng Li

Wenhua Wang

Chengyong Li

Di Wang

Tuanzhang Li

The disclosure relates to the technical field of solar seawater desalination, in particular to an all-weather solar seawater desalination device and a method. Through a prepared composite hydrogel evaporator, the water in seawater is evaporated into steam and condensed into fresh water. By combining solar energy with a long afterglow luminous device, the composite hydrogel evaporator is irradiated by solar energy to evaporate during the day, while at night, the light energy released by the long afterglow luminous device continues to maintain the evaporation process.

All-weather solar seawater desalination device and method

A method for preparing a carbon nano tube/polyacrylic acid hydrogel, a product and an application thereof are provided. The method includes: oxidizing a carbon nanotube into a carboxylated carbon nanotube, thereafter performing in-situ polymerization with acrylic acid, sodium hydroxide, ammonium persulfate, triethanolamine and N, N-methylenebisacrylamide to obtain a carbon nanotube/polyacrylic acid hydrogel. The hydrogel has a uniform porous structure, facilitating a rapid transmission and supply of water. The carbon nanotubes in the hydrogel are of an array structure, achieving a full absorption of solar energy to realize a high-efficiency photothermal conversion. The gel is attached to a sponge base to obtain a solar-powered carbon nano tube/polyacrylic acid hydrogel steam generator for the photothermal conversion. The steam generator is used for solar seawater desalination, but can improve evaporation rate and evaporation efficiency. In addition, the steam generator has many advantages, such as energy conservation, environmental protection, simplicity and practicability.

Method for preparing carbon nanotube/polyacrylic acid hydrogel, product and application thereof

A composite hydrogel sponge and its preparation method and application, and a solar desalination device are provided. The composite hydrogel sponge includes a water supply layer and an evaporation layer disposed on the water supply layer. A material of the water supply layer is polyacrylamide hydrogel, and a material of the evaporation layer is polyacrylamide/graphene composite hydrogel. The polyacrylamide/graphene composite hydrogel includes the polyacrylamide hydrogel and the graphene dispersed in the polyacrylamide hydrogel. The composite hydrogel sponge has a special porous structure of the sponge, which is beneficial to the rapid transmission and supply of water; meanwhile, the graphene on the surface of the evaporation layer can fully receive solar energy to achieve higher photo-thermal conversion efficiency.

Composite hydrogel sponge and its preparation method and application, solar desalination device

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Guangzhou, China

Jingyuan Guo