Razavi, Atieh ; Rutsch, Matthias ; Wismath, Sonja ; Kupnik, Mario ; Klitzing, Regine von ; Rahimzadeh, Amin (2022)
Frequency-Dependent Ultrasonic Stimulation of Poly(N-isopropylacrylamide) Microgels in Water.
In: Gels, 2022, 8 (10)
doi: 10.26083/tuprints-00022833
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
As a novel stimulus, we use high-frequency ultrasonic waves to provide the required energy for breaking hydrogen bonds between Poly(N-isopropylacrylamide) (PNIPAM) and water molecules while the solution temperature is maintained below the volume phase transition temperature (VPTT = 32 °C). Ultrasonic waves propagate through the solution and their energy will be absorbed due to the liquid viscosity. The absorbed energy partially leads to the generation of a streaming flow and the rest will be spent to break the hydrogen bonds. Therefore, the microgels collapse and become insoluble in water and agglomerate, resulting in solution turbidity. We use turbidity to quantify the ultrasound energy absorption and show that the acousto-response of PNIPAM microgels is a temporal phenomenon that depends on the duration of the actuation. Increasing the solution concentration leads to a faster turbidity evolution. Furthermore, an increase in ultrasound frequency leads to an increase in the breakage of more hydrogen bonds within a certain time and thus faster turbidity evolution. This is due to the increase in ultrasound energy absorption by liquids at higher frequencies.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Razavi, Atieh ; Rutsch, Matthias ; Wismath, Sonja ; Kupnik, Mario ; Klitzing, Regine von ; Rahimzadeh, Amin |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Frequency-Dependent Ultrasonic Stimulation of Poly(N-isopropylacrylamide) Microgels in Water |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2022 |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Gels |
| Jahrgang/Volume einer Zeitschrift: | 8 |
| (Heft-)Nummer: | 10 |
| Kollation: | 8 Seiten |
| DOI: | 10.26083/tuprints-00022833 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/22833 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | As a novel stimulus, we use high-frequency ultrasonic waves to provide the required energy for breaking hydrogen bonds between Poly(N-isopropylacrylamide) (PNIPAM) and water molecules while the solution temperature is maintained below the volume phase transition temperature (VPTT = 32 °C). Ultrasonic waves propagate through the solution and their energy will be absorbed due to the liquid viscosity. The absorbed energy partially leads to the generation of a streaming flow and the rest will be spent to break the hydrogen bonds. Therefore, the microgels collapse and become insoluble in water and agglomerate, resulting in solution turbidity. We use turbidity to quantify the ultrasound energy absorption and show that the acousto-response of PNIPAM microgels is a temporal phenomenon that depends on the duration of the actuation. Increasing the solution concentration leads to a faster turbidity evolution. Furthermore, an increase in ultrasound frequency leads to an increase in the breakage of more hydrogen bonds within a certain time and thus faster turbidity evolution. This is due to the increase in ultrasound energy absorption by liquids at higher frequencies. |
| Freie Schlagworte: | poly(N-isopropylacrylamide), microgels, ultrasound, turbidity, hydrogen bond, acousto-responsive |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-228332 |
| Zusätzliche Informationen: | This article belongs to the Special Issue Thermoresponsive Microgels |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Mess- und Sensortechnik 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Physik Kondensierter Materie (IPKM) 05 Fachbereich Physik > Institut für Physik Kondensierter Materie (IPKM) > Soft Matter at Interfaces (SMI) |
| Hinterlegungsdatum: | 07 Nov 2022 12:03 |
| Letzte Änderung: | 09 Nov 2022 09:27 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Frequency-Dependent Ultrasonic Stimulation of Poly(N-isopropylacrylamide) Microgels in Water. (deposited 07 Nov 2022 12:03) [Gegenwärtig angezeigt]
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