A kind of full fiber three-dimensional assembly and its preparation method and application
An all-fiber and aggregate technology, applied in fiber processing, filament/thread forming, textiles and papermaking, etc., can solve the problems of low light-vapor conversion efficiency and reduced evaporation efficiency, and achieve broad application prospects and large specific surface area , the effect of small diameter
Active Publication Date: 2022-05-10
SHENZHEN UNIV
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Problems solved by technology
[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a full-fiber three-dimensional aggregate and its preparation method and application, aiming to solve the problems of low light-vapor conversion efficiency and long-term use of existing interface light-vapor conversion materials. The problem of salt precipitation further reducing its evaporation efficiency
Method used
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Embodiment 1
[0048] (1) Add 1.8g of polyvinylidene fluoride particles and 0.18g of MTTT-BT powder into 10mL of a mixed solvent of N,N-dimethylformamide and tetrahydrofuran with a volume ratio of 7:3, and stir magnetically at 50°C for 24h to obtain Spinning solution of polyvinylidene fluoride and MTTT-BT; during electrospinning, use a 5mL syringe, a 21G stainless steel needle, an applied voltage of 15kV, a receiving distance of 15cm, and a spinning time of 3h to obtain the first nanofibrous membrane (i.e. Photothermal fiber membrane).
[0049] (2) Get 1.2g polycaprolactone particles, dissolve in 10mL trifluoroethanol solvent, and magnetically stir for 12h at room temperature to obtain a clear spinning solution containing polycaprolactone, according to the spinning conditions of the preparation step (1) Electrospinning is performed to obtain the second nanofibrous membrane.
[0050] (3) Weigh 0.75g of the first nanofiber membrane and 0.25g of the second nanofiber membrane, put them together...
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Abstract
The invention discloses a full-fiber three-dimensional assembly and its preparation method and application. The first nanofiber film formed by a polymer and a photothermal agent is mixed and formed by a second nanofiber film formed by polycaprolactone to obtain a base materials, and use water-soluble polymers to cross-link on one side of the substrate to form hydrophilic nanofiber particles. The obtained three-dimensional aggregates of full fibers have the characteristics of light-to-heat conversion performance, body-shaped mesh structure and high porosity; The characteristics of water heterogeneity combined with the characteristics of small diameter, high porosity and large specific surface area of the nanofibers in the full-fiber three-dimensional aggregate make it self-pumping; it can achieve a balance between high light-steam conversion efficiency and long life, and maintain continuous self-pumping. With pumping and self-cleaning capabilities, it has broad application prospects in seawater desalination, sewage treatment and other fields.
Description
technical field [0001] The invention relates to the technical field of solar light absorbers, in particular to a full-fiber three-dimensional aggregate and its preparation method and application. Background technique [0002] With the development of human society, water resources are becoming increasingly scarce. The low-cost and sustainable purification of freshwater from seawater is the only way for future development, especially the demand for seawater desalination in coastal cities and island cities is becoming increasingly prominent. However, traditional seawater desalination plants mostly use membrane separation technology, which has high cost, large initial investment, and consumes a lot of energy, which is not conducive to large-scale promotion in remote areas. As a clean and renewable energy source, solar energy has been trying to use solar energy as the driving force for seawater desalination. In recent years, the concept of interfacial photovapor conversion has ...
Claims
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IPC IPC(8): B29C39/02B29C39/22D01D5/00D04H1/435D04H1/728D04H3/005D04H3/02
CPCB29C39/02B29C39/22D04H1/728D04H1/435D04H3/005D04H3/02D01D5/003
Inventor 王东李昊轩温海飞黄佳昌李杰
Owner SHENZHEN UNIV