A kind of polylactic acid-based photothermal film and preparation method thereof
A polylactic acid-based and polylactic acid technology is applied in the field of polylactic acid-based photothermal film and its preparation, which can solve the problems of reducing photothermal conversion efficiency, reducing mechanical properties, and reducing the light absorption performance of photothermal materials, so as to improve the thermal conductivity. Effects of stability and photothermal conversion performance, high thermal stability, excellent photothermal conversion capacity
Active Publication Date: 2022-07-29
NANJING FORESTRY UNIV
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Problems solved by technology
For example, Guo et al. used melt spinning technology to combine polylactic acid and WO 2.72 It is prepared as an interface evaporator film, but the photothermal material is directly mixed with the matrix material and the film is prepared by spinning technology, which will inevitably reduce its mechanical properties, and the matrix material will also tightly wrap the photothermal material, so that It will greatly reduce the light absorption performance of photothermal materials and thus reduce the photothermal conversion efficiency.
Method used
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[0028] (1) Preparation of polylactic acid modified lignin (LA)
[0029] 200 mg of lignin, 2.88 g of lactide and 0.0288 g of stannous octoate were added to 50 mL of anhydrous toluene, and transferred to a three-necked flask, heated to 130 °C under nitrogen atmosphere and kept for 24 h. After the reaction, methanol was added to obtain a precipitate, and the solvent was removed through a vacuum filtration device. The obtained product was dried in a vacuum oven at 60 °C for 24 hours to obtain polylactic acid modified lignin (LA).
[0030] (2) Polydopamine modified alum disulfide (VS 2 @PDA) preparation
[0031] 0.55 g of sodium orthovanadate (Na 3 VO 4 ) and 1.13g of thioacetamide were added to 40 mL of deionized water for ultrasonication to obtain a homogeneous solution, which was then placed in a hydrothermal kettle and reacted at 160°C for 24h, repeatedly washed with deionized water, and filtered through vacuum suction. and drying to obtain alumen disulfide powder (VS 2 )....
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Abstract
The invention discloses a polylactic acid-based photothermal film and a preparation method thereof. The polylactic acid and polylactic acid-modified lignin are dissolved in a volatile organic solvent in a certain mass ratio, and then the obtained electrospinning technology is used. The base film is prepared from the mixed solution of , and then the polydopamine-modified vanadium disulfide solution is sprayed on both sides of the base film by spraying technology. The photothermal film obtained by the invention has thermal stability and better photothermal conversion ability, which broadens its application in the field of solar interface evaporation and thermoelectric conversion.
Description
technical field [0001] The invention belongs to the field of functional film materials, in particular to a polylactic acid-based photothermal film and a preparation method thereof. Background technique [0002] Solar energy is a sustainable energy source. In previous literature reports, photothermal conversion materials can use sunlight to generate heat and then perform interfacial evaporation to generate water vapor, which can be condensed to generate clean water to solve drinking water problems. At the same time, the use of solar energy for light-heat-electric conversion can also solve the environmental pollution problem caused by traditional thermal power generation. So far, traditional photothermal materials such as noble metal nanoparticles, semiconductor materials, carbon materials and polymers have been studied to improve solar evaporation efficiency. Photothermal conversion materials can absorb sunlight and express it in the form of heat, which can be used for inter...
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IPC IPC(8): C08J7/04C08L67/04C08L97/00
CPCC08J7/04C08J2367/04C08J2497/00C08J2467/04
Inventor 付宇魏泽昌
Owner NANJING FORESTRY UNIV