研究目的
To fabricate and characterize transparent hard self-cleaning nano-hybrid coatings on polycarbonate substrates using a sol-gel method and surface modification with PFTS, aiming to improve hardness, transmittance, and hydrophobicity for applications in solar cells, automotive, and optical lenses.
研究成果
The modified nano-hybrid coating based on GPTMS and silica nanoparticles demonstrated improved hardness (3H), high transparency (95% transmittance at 550 nm), hydrophobicity (110° contact angle), and effective self-cleaning properties. It is suitable for applications in solar cells, automotive, and optical lenses, offering potential reductions in maintenance costs. Future work should focus on achieving superhydrophobicity and enhancing mechanical durability.
研究不足
The coating achieved a water contact angle of 110°, which is hydrophobic but not superhydrophobic (typically >150°), limiting self-cleaning efficiency. The study did not extensively test mechanical durability or long-term stability under environmental conditions. Optimization of plasma etching parameters and nanoparticle distribution could enhance performance.
1：Experimental Design and Method Selection:
The study employed a sol-gel dip coating method to deposit GPTMS-silica nano-hybrid coatings on polycarbonate substrates, followed by surface modification with PFTS to impart hydrophobicity. Characterization methods included FE-SEM, EDS, AFM, ATR-FTIR, UV–vis-NIR spectrophotometry, water contact angle analysis, adhesion tape test, pencil hardness test, and self-cleaning evaluation.
2：Sample Selection and Data Sources:
Polycarbonate substrates (5.00 × 5.00 cm2) were used. Materials included GPTMS, EDA, ethanol, HCl, silica nanoparticles (20 nm), and PFTS, sourced from Merck, Technan, and Aldrich.
3：00 × 00 cm2) were used. Materials included GPTMS, EDA, ethanol, HCl, silica nanoparticles (20 nm), and PFTS, sourced from Merck, Technan, and Aldrich.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment: FE-SEM (Hitachi S4160), EDS, AFM (DS95-200), ATR-FTIR (Bruker Tensor 27), UV–vis-NIR spectrophotometer (Shimadzu UV-3100), water contact angle analyzer, plasma etcher (Plasma Fanavar Co,
4：56 MHz), ultrasonic bath. Materials:
GPTMS, EDA, ethanol, HCl, silica nanoparticles, PFTS, polycarbonate substrates.
5：Experimental Procedures and Operational Workflow:
Substrates were cleaned, plasma-etched (O2 plasma for 10 min at 200 W, 0.5 torr, 4 sccm), dip-coated in hybrid sol (immersion for 10 s, withdrawal at 2 mm/s), dried at 80°C for 60 min, modified by immersion in PFTS sol for 5 min (withdrawal at 3 mm/s), dried at 80°C for 30 min, with additional plasma etching (Ar plasma for 30 min at 200 W, 0.3 torr, 4 sccm) before modification. Characterization was performed post-treatment.
6：5 torr, 4 sccm), dip-coated in hybrid sol (immersion for 10 s, withdrawal at 2 mm/s), dried at 80°C for 60 min, modified by immersion in PFTS sol for 5 min (withdrawal at 3 mm/s), dried at 80°C for 30 min, with additional plasma etching (Ar plasma for 30 min at 200 W, 3 torr, 4 sccm) before modification. Characterization was performed post-treatment.
Data Analysis Methods:
5. Data Analysis Methods: Data from spectroscopic, microscopic, and contact angle measurements were analyzed to assess coating properties, including morphology, composition, roughness, transmittance, hardness, adhesion, and hydrophobicity.
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