Li, Shuai ; Lam, Cheuk Wing Edmond ; Donati, Matteo ; Regulagada, Kartik ; Yavuz, Emre ; Pfeiffer, Till ; Sarkiris, Panagiotis ; Gogolides, Evangelos ; Milionis, Athanasios ; Poulikakos, Dimos ; Butt, Hans-Jürgen ; Kappl, Michael (2024)
Durable, ultrathin, and antifouling polymer brush coating for efficient condensation heat transfer.
In: ACS Applied Materials & Interfaces, 16 (1)
doi: 10.1021/acsami.3c17293
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Heat exchangers are made of metals because of their high heat conductivity and mechanical stability. Metal surfaces are inherently hydrophilic, leading to inefficient filmwise condensation. It is still a challenge to coat these metal surfaces with a durable, robust and thin hydrophobic layer, which is required for efficient dropwise condensation. Here, we report the non-structured and ultrathin (~6 nm) polydimethylsiloxane (PDMS) brushes on copper that sustain high-performing dropwise condensation in high supersaturation. Due to the flexible hydrophobic siloxane polymer chains, the coating has low resistance to drop sliding and excellent chemical stability. The PDMS brushes can sustain dropwise condensation for up to ~8 h during exposure to 111 °C saturated steam flowing at 3 m/s, with a 5-7 times higher heat transfer coefficient compared to filmwise condensation. The surface is self-cleaning and can reduce bacterial attachment by 99%. This low-cost, facile, fluorine-free, and scalable method is suitable for a great variety of condensation heat transfer applications.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Li, Shuai ; Lam, Cheuk Wing Edmond ; Donati, Matteo ; Regulagada, Kartik ; Yavuz, Emre ; Pfeiffer, Till ; Sarkiris, Panagiotis ; Gogolides, Evangelos ; Milionis, Athanasios ; Poulikakos, Dimos ; Butt, Hans-Jürgen ; Kappl, Michael |
| Art des Eintrags: | Bibliographie |
| Titel: | Durable, ultrathin, and antifouling polymer brush coating for efficient condensation heat transfer |
| Sprache: | Englisch |
| Publikationsjahr: | 10 Januar 2024 |
| Verlag: | ACS Publications |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | ACS Applied Materials & Interfaces |
| Jahrgang/Volume einer Zeitschrift: | 16 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1021/acsami.3c17293 |
| Kurzbeschreibung (Abstract): | Heat exchangers are made of metals because of their high heat conductivity and mechanical stability. Metal surfaces are inherently hydrophilic, leading to inefficient filmwise condensation. It is still a challenge to coat these metal surfaces with a durable, robust and thin hydrophobic layer, which is required for efficient dropwise condensation. Here, we report the non-structured and ultrathin (~6 nm) polydimethylsiloxane (PDMS) brushes on copper that sustain high-performing dropwise condensation in high supersaturation. Due to the flexible hydrophobic siloxane polymer chains, the coating has low resistance to drop sliding and excellent chemical stability. The PDMS brushes can sustain dropwise condensation for up to ~8 h during exposure to 111 °C saturated steam flowing at 3 m/s, with a 5-7 times higher heat transfer coefficient compared to filmwise condensation. The surface is self-cleaning and can reduce bacterial attachment by 99%. This low-cost, facile, fluorine-free, and scalable method is suitable for a great variety of condensation heat transfer applications. |
| Zusätzliche Informationen: | Published online 20 December 2023. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Technische Thermodynamik (TTD) DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen > Projektbereich C: Neue und verbesserte Anwendungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen > Projektbereich C: Neue und verbesserte Anwendungen > C03: Kondensation von Wasser an superamphiphoben Oberflächen |
| Hinterlegungsdatum: | 06 Mär 2024 06:09 |
| Letzte Änderung: | 06 Mär 2024 10:19 |
| PPN: | 516042335 |
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