Thermal degradation of hydrophobic graphite-based thin film nano-coatings observed by Raman spectroscopy

Gutiérrez-Cano, Vanessa; Rodrı́guez, F.; González, J.; Díaz, Vanesa

doi:10.1016/j.tsf.2017.12.023

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…The degradation temperature (third stage) of G-THA film slightly increased to 316.7 °C compared with the G film. Meanwhile, the degradation temperature of G-THA film further upgraded to 320.6 °C based on the protective effect of hydrophobic SA coating, which slowed down the thermal transmission and migration of volatile molecules . However, the thermal stability of G-THA/NAS film slightly weakened (320.1–319.6 °C), which was due to the agglomeration effect of the nanoparticles .…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the degradation temperature of G-THA film further upgraded to 320.6 °C based on the protective effect of hydrophobic SA coating, which slowed down the thermal transmission and migration of volatile molecules. 50 However, the thermal stability of G-THA/NAS film slightly weakened (320.1−319.6 °C), which was due to the agglomeration effect of the nanoparticles. 51 In general, spraying the NAS coating did not cause significant effects on the thermal stability of the G-THA film.…”

Section: Characterization Of Tha and G-tha/nas Filmsmentioning

confidence: 91%

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Highly Hydrophobic Gelatin Nanocomposite Film Assisted by Nano-ZnO/(3-Aminopropyl) Triethoxysilane/Stearic Acid Coating for Liquid Food Packaging

Bu,

Wang,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Biodegradable gelatin (G) food packaging films are in increasing demand as the substitution of petroleum-based preservative materials. However, G packaging films universally suffer from weak hydrophobicity in practical applications. Constructing a hydrophobic micro/nanocoating with low surface energy is an effective countermeasure. However, the poor compatibility with the hydrophilic G substrate often leads to the weak interfacial adhesion and poor durability of the hydrophobic coating. To overcome this obstacle, we used (3-aminopropyl) triethoxysilane (APS) as an interfacial bridging agent to prepare a highly hydrophobic, versatile G nanocomposite film. Specifically, tannic acid (TA)-modified nanohydroxyapatite (n-HA) particles (THA) were introduced in G matrix (G-THA) to improve the mechanical properties. Micro/nanostructure with low surface energy composed of nanozinc oxide (Nano-ZnO)/APS/stearic acid (SA) (NAS) was constructed on the surface of G-THA film (G-THA/NAS) through one-step spray treatment. Consequently, as-prepared G-THA/NAS film presented excellent mechanics (tensile strength: 7.6 MPa, elongation at break: 292.7%), water resistance ability (water contact angle: 150.4°), high UV-shielding (0% transmittance at 200 nm), degradability (100% degradation rate after buried in the natural soil for 15 days), antioxidant (78.8% of 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity), and antimicrobial (inhibition zone against Escherichia coli: 15.0 mm and Staphylococcus aureus: 16.5 mm) properties. It should be emphasized that the bridging function of APS significantly improves the interfacial adhesion ability of the NAS coating with more than 95% remaining area after the cross-cut adhesion test. Meanwhile, the G-THA/NAS film could maintain stable and long-lasting hydrophobic surfaces against UV radiation, high temperature, and abrasion. Based on these multifunctional properties, the G-THA/NAS film was successfully applied as a liquid packaging material. To sum up, we provide a feasible and effective method to prepare high-performance green packaging films.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Tha and G-tha/nas Filmsmentioning

confidence: 91%

Highly Hydrophobic Gelatin Nanocomposite Film Assisted by Nano-ZnO/(3-Aminopropyl) Triethoxysilane/Stearic Acid Coating for Liquid Food Packaging

Bu,

Wang,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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“…According to literatures, the water contact angle of graphite was approximately 85°-98°. [31][32][33][34][35][36] In our case, the water contact angle of CP was ∼97.24°. After rGO-CS pastes were screen-printed on the electrode, the water contact angle decreased to 35.06°.…”

Section: Resultsmentioning

confidence: 99%

Comparison between PEDOT:PSS and Carbon Pastes for Preparing Flexible Electrodes of Supercapacitors

Wang

Cheng

Chen

2022

ECS J. Solid State Sci. Technol.

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We compare screen-printed flexible reduced graphene oxide(rGO)-chitosan(CS) supercapacitors (SCs) prepared using poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) pastes and carbon pastes (CPs). SCs with PEDOT:PSS (PEDOT:PSS/rGO-CS SCs) exhibit a higher pseudocapacitance (PC) than do those with CP. Plasma treatment damages the electrodes and lowers the specific capacitance of SCs. In a galvanostatic charge-discharge (GCD) test with a constant current of 0.25 mA, PEDOT:PSS/rGO-CS and CP/rGO-CS SCs respectively show a maximum specific capacitance of 14.70 and 4.63 mF/cm2. PEDOT:PSS/rGO-CS and CP/rGO-CS SCs both show excellent performance in the stability and bending tests. With a 5,000-cycle cyclic voltammetry (CV) test, the capacitive retention rates are more than 97%. No degradation is observed for both PEDOT:PSS/rGO-CS and CP/rGO-CS SCs bent with a bending radius of 0.5 cm.

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Wetting metamorphosis of hydrophobic fluoropolymer coatings submerged in water and ultrasonically vibrated

et al. 2019

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Thermal degradation of hydrophobic graphite-based thin film nano-coatings observed by Raman spectroscopy

Cited by 8 publications

References 29 publications

Highly Hydrophobic Gelatin Nanocomposite Film Assisted by Nano-ZnO/(3-Aminopropyl) Triethoxysilane/Stearic Acid Coating for Liquid Food Packaging

Highly Hydrophobic Gelatin Nanocomposite Film Assisted by Nano-ZnO/(3-Aminopropyl) Triethoxysilane/Stearic Acid Coating for Liquid Food Packaging

Comparison between PEDOT:PSS and Carbon Pastes for Preparing Flexible Electrodes of Supercapacitors

Wetting metamorphosis of hydrophobic fluoropolymer coatings submerged in water and ultrasonically vibrated

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