研究目的
To fabricate scalable, low-cost photothermal conversion coatings with self-healing superhydrophobicity for efficient solar steam generation, addressing issues of contamination, damage, and high costs in existing materials.
研究成果
The BCP7 coatings exhibit efficient photothermal conversion, self-cleaning, and self-healing superhydrophobicity, with potential for fresh water production in remote areas. They are low-cost, scalable, and durable, offering a promising solution for solar steam generation applications.
研究不足
The study uses simulated solar light and controlled lab conditions; real-world environmental variations (e.g., fluctuating sunlight, wind) may affect performance. Long-term durability beyond 56 hours not fully tested. Scalability to industrial levels not demonstrated.
1：Experimental Design and Method Selection:
The study involves fabricating coatings by spray coating a mixture of beeswax, multiwalled carbon nanotubes (MCNTs), and polydimethylsiloxane (PDMS) on various substrates. The design is inspired by lotus leaves for self-healing superhydrophobicity.
2：Sample Selection and Data Sources:
Substrates include glass, plastic, and wood. Materials are sourced as received, with sea water from Bohai Sea.
3：List of Experimental Equipment and Materials:
Equipment includes spray gun (Infinity CRplus, Harder & Steenbeck), SEM (XL30 ESEM FEG), contact angle goniometer (DSA10-MK2, Kruess), UV-Vis spectrophotometer (UV-3600, Shimadzu), thermal imager (Testo 869), four-point probe (RTS-8, Four Probe Tech.), plasma cleaner (YZD08-5C), DC power supply (KXN-305D, ZhaoXin Electronic), surface profiler (Dektak 150), laser flash analyzer (LFA 1000, Linseis), ICP-OES (Agilent 725). Materials include PDMS (Sylgard 184, Dow Corning), MCNTs (model TNIM 4, Chengdu Organic Chemicals), beeswax, THF, and deionized water.
4：5). Materials include PDMS (Sylgard 184, Dow Corning), MCNTs (model TNIM 4, Chengdu Organic Chemicals), beeswax, THF, and deionized water. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Dispersion mixture is sprayed onto substrates, dried at 50°C, and repeated for multiple cycles. Coatings are characterized for thickness, roughness, wettability, conductivity, light absorption, photothermal performance, steam generation, self-cleaning, and self-healing abilities under various conditions (e.g., immersion in corrosive solutions, plasma etching).
5：Data Analysis Methods:
Data analyzed using instruments mentioned; solar thermal conversion efficiency calculated using equation involving heat of evaporation and light power.
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PDMS
Sylgard 184
Dow Corning
Used as a matrix material in the coating mixture to provide mechanical stability and low surface energy.
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UV-Vis Spectrophotometer
UV-3600
Shimadzu
Measure reflection and transmission spectra of the coatings.
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Surface Profiler
Dektak 150
Veeco
Measure thickness and roughness of the coatings.
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ICP-OES
Agilent 725
Agilent
Characterize ion concentrations in fresh water.
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MCNTs
TNIM 4
Chengdu Organic Chemicals
Provide conductivity and photothermal conversion ability in the coatings.
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Spray Gun
Infinity CRplus
Harder & Steenbeck
Used for spray coating the dispersion mixture onto substrates.
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SEM
XL30 ESEM FEG
Used for imaging the surface morphology of the coatings.
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Contact Angle Goniometer
DSA10-MK2
Kruess
Measure water contact angles and sliding angles on the coatings.
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Thermal Imager
Testo 869
Testo AG
Monitor temperature changes during photothermal and electrothermal experiments.
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Four-Point Probe
RTS-8
Four Probe Tech.
Measure sheet resistance of the coatings.
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Plasma Cleaner
YZD08-5C
Used for O2 plasma etching to simulate oxidative damage.
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DC Power Supply
KXN-305D
ZhaoXin Electronic
Provide DC current for electrothermal experiments.
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Laser Flash Analyzer
LFA 1000
Linseis
Measure thermal conductivity of the coatings.
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