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Photothermal conversion plastic film for seawater desalting and preparation method

A technology of plastic film and light-to-heat conversion, applied in chemical instruments and methods, seawater treatment, general water supply saving, etc., can solve the problems of low seawater desalination efficiency, poor chemical corrosion resistance, complicated preparation process, etc., to ensure the penetration of seawater Overcome the effect of poor corrosion resistance and simple operation

Active Publication Date: 2018-04-13
ZHEJIANG ZHONGFA FILM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the defect that the coating layer of the currently widely used light-to-heat conversion plastic film for seawater desalination will block the substrate film, resulting in low seawater desalination efficiency, poor chemical corrosion resistance, and mostly a multi-layer structure, complicated preparation process and high cost. , the present invention proposes a light-to-heat conversion plastic film for seawater desalination. By embedding microporous starch and nano-gold particles in the film, the light-to-heat conversion efficiency and seawater evaporation are effectively guaranteed, and the seawater desalination speed is improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Disperse gold nanoparticles and polyvinylidene fluoride in dimethyl sulfoxide, first ultrasonically disperse for 18 minutes, then use magnetic stirring and heat until polyvinylidene fluoride is completely dissolved; the ultrasonic power of ultrasonic dispersion is 6kW , the ultrasonic frequency is 30kHz; the magnetic stirring adopts a constant temperature magnetic stirrer, the size of the heating plate is 160mm×160mm, the temperature control deviation does not exceed ±0.1°C, the stirring speed is 450r / min, and the heating temperature is 84°C; the nano-gold particles are 4 weight Parts, 40 parts by weight of polyvinylidene fluoride, 45 parts by weight in dimethyl sulfoxide;

[0042] (2) Lay the microporous starch film in the mold with a thickness of 0.3mm, and introduce the dispersion liquid in step (1) into the mold. After the dispersion liquid is evenly soaked in the microporous starch, use infrared heating; the infrared heater is 6 The distance between the heaters...

Embodiment 2

[0046] (1) Disperse gold nanoparticles and polyvinylidene fluoride in N-methylpyrrolidone, first ultrasonically disperse for 16 minutes, then stir and heat with magnetic force until the polyvinylidene fluoride is completely dissolved; the ultrasonic power of ultrasonic dispersion is 6kW , the ultrasonic frequency is 45kHz; the magnetic stirring adopts a constant temperature magnetic stirrer, the size of the heating plate is 150mm×150mm, the temperature control deviation does not exceed ±0.1°C, the stirring speed is 500r / min, and the heating temperature is 88°C; the nano-gold particles are 4 weight 45 parts by weight, 45 parts by weight of polyvinylidene fluoride, 45 ~ 54 parts by weight in N-methylpyrrolidone;

[0047] (2) Spread the microporous starch film in the mold with a thickness of 0.4mm, and introduce the dispersion liquid in step (1) into the mold. After the dispersion liquid is evenly soaked in the microporous starch, use infrared heating; the infrared heater is 5 Th...

Embodiment 3

[0051] (1) Disperse gold nanoparticles and polyvinylidene fluoride in N,N-dimethylacetyl, first ultrasonically disperse for 20 minutes, and then use magnetic stirring and heating until the polyvinylidene fluoride is completely dissolved; The power is 4kW, the ultrasonic frequency is 50kHz; the magnetic stirring adopts a constant temperature magnetic stirrer, the size of the heating plate is 200mm×200mm, the temperature control deviation does not exceed ±0.1°C, the stirring speed is 550r / min, and the heating temperature is 86°C; the nano-gold 6 parts by weight of particles, 40 parts by weight of polyvinylidene fluoride, and 50 parts by weight of N,N-dimethylacetyl;

[0052] (2) Lay the microporous starch film in the mold with a thickness of 0.5mm, and introduce the dispersion liquid in step (1) into the mold. After the dispersion liquid is evenly soaked in the microporous starch, use infrared heating; the infrared heater is 4 The distance between the heaters is 3cm, the distanc...

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Abstract

The invention provides a photothermal conversion plastic film for seawater desalting. A preparation method comprises the following steps: dispersing nanogold particles and polytetrafluoroethylene intoa solvent, and performing molding through a micropore starch flat film. As casting film is implemented on the micropore starch flat membrane, micropore starch of biomass is subjected to long-term microorganism action in seawater, micropores are excellent in water permeability, and the seawater can be effectively evaporated and penetrate. In addition, sunshine is absorbed repeatedly by the nanogold particles in a micropore structure, partial heating is effectively implemented, the photothermal conversion efficiency and the seawater desalting efficiency are improved, the seawater desalting speed is increased, the defects that a conventional membrane is poor in corrosion resistance and needs a multi-layer structure are overcome, and meanwhile the whole method is simple to operate, low in production and use cost and feasible in large-scale production.

Description

technical field [0001] The invention relates to the field of seawater desalination, in particular to seawater desalination through light-to-heat conversion, in particular to a light-to-heat conversion plastic film for seawater desalination and a preparation method. Background technique [0002] my country is a country with serious shortage of water resources. At the same time, the temporal and spatial distribution of fresh water resources is extremely uneven, and water pollution has exacerbated the scarcity of available fresh water resources. At the same time of resource water shortage, my country's rapid economic growth, large population, and continuous improvement of urbanization level have made the gap in water resources more and more serious. This has become a bottleneck hindering the sustainable development of our society. There are 18,000 With a coastline of more than one kilometer, giving full play to the advantages of these areas being close to the ocean, taking the r...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08L3/02C08K3/08C08J5/18B01D71/36C02F1/08C02F103/08
CPCB01D71/36C02F1/08C02F2103/08C08J5/18C08J2327/18C08J2403/02C08K2003/0831C08K2201/003C08K2201/011Y02A20/124
Inventor 陈庆贯大为
Owner ZHEJIANG ZHONGFA FILM
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