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Polylactic acid-based photo-thermal film and preparation method thereof

A technology based on polylactic acid and polylactic acid, which is applied in the field of polylactic acid-based photothermal film and its preparation, can solve the problems of reducing photothermal conversion efficiency, reducing light absorption performance of photothermal materials, reducing mechanical properties, etc. Effects of stability and photothermal conversion performance, excellent photothermal conversion ability, and high thermal stability

Active Publication Date: 2021-06-15
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Polylactic acid-based photo-thermal film and preparation method thereof
  • Polylactic acid-based photo-thermal film and preparation method thereof
  • Polylactic acid-based photo-thermal film and preparation method thereof

Examples

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Embodiment

[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 moved to a three-necked bottle 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 by a vacuum filtration device, and 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 of

[0031] 0.55 g sodium orthovanadate (Na 3 VO 4 ) and 1.13g of thioacetamide were added to 40 mL of deionized water to obtain a homogeneous solution by ultrasonication, then placed in a hydrothermal kettle and reacted at 160°C for 24 hours, washed repeatedly with deionized water, and vacuum filtered and drying to obtain alum disulfide powder (VS 2 ). Next, 0.2 g of dopamine and 0.1...

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Abstract

The invention discloses a polylactic acid-based photo-thermal film and a preparation method thereof. The method comprises the following steps: dissolving polylactic acid and polylactic acid modified lignin in a volatile organic solvent according to a certain mass ratio, preparing a matrix film from the obtained mixed solution by using an electrostatic spinning technology, and then spraying a polydopamine modified alum disulfide solution on the two sides of the matrix membrane by using a spraying technology. The photo-thermal thin film obtained through the method has thermal stability and more excellent photo-thermal conversion capacity, and the application range of the photo-thermal thin film in the solar interface evaporation field and the thermoelectric conversion field is widened.

Description

technical field [0001] The invention belongs to the field of functional film materials, and in particular relates 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 energy and then evaporate at the interface to generate water vapor, which can be condensed to produce clean water to solve the problem of drinking water. At the same time, the use of solar energy for photo-thermal-electric conversion can also solve the environmental pollution problems 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 enhance solar evaporation efficiency. Photothermal conversion materials can absorb sunlight and express it in the form of heat, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08L67/04C08L97/00
CPCC08J7/04C08J2367/04C08J2497/00C08J2467/04
Inventor 付宇魏泽昌
Owner NANJING FORESTRY UNIV
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