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Unravelling the Aco...
Unravelling the Acoustic and Thermal Responses of Perfluorocarbon Liquid Droplets Stabilized with Cellulose Nanofibers
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- Ghorbani, Morteza (author)
- KTH,Medicinsk avbildning,Sabanci Univ, Fac Engn & Nat Sci, Mechatron Engn Program, TR-34956 Istanbul, Turkey,KTH Royal Institute of Technology, Sweden; Sabanci University, Turkey
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- Olofsson, Karl (author)
- KTH,Tillämpad fysik,KTH Royal Institute of Technology, Sweden
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- Benjamins, Jan-Willem (author)
- RISE,Yta, process och formulering,Research Institute of Sweden (RISE), Chemistry, Materials and Surfaces, Box 5607, SE-114 86 Stockholm, Sweden
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- Loskutova, Ksenia (author)
- KTH,Medicinsk avbildning,KTH Royal Institute of Technology, Sweden
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- Paulraj, Thomas (author)
- KTH,Polymera material,KTH Royal Institute of Technology, Sweden
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- Wiklund, Martin (author)
- KTH,Biomedicinsk fysik och röntgenfysik
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- Grishenkov, Dmitry, Associate Professor, 1983- (author)
- KTH,Medicinsk avbildning,KTH Royal Institute of Technology, Sweden
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- Svagan, Anna Justina (author)
- KTH,Fiber- och polymerteknologi,KTH Royal Institute of Technology, Sweden
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(creator_code:org_t)
- 2019-09-24
- 2019
- English.
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In: Langmuir. - : American Chemical Society. - 0743-7463 .- 1520-5827. ; 35:40, s. 13090-13099
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The attractive colloidal and physicochemical properties of cellulose nanofibers (CNFs) at interfaces have recently been exploited in the facile production of a number of environmentally benign materials, e.g. foams, emulsions, and capsules. Herein, these unique properties are exploited in a new type of CNF-stabilized perfluoropentane droplets produced via a straightforward and simple mixing protocol. Droplets with a comparatively narrow size distribution (ca. 1-5 μm in diameter) were fabricated, and their potential in the acoustic droplet vaporization process was evaluated. For this, the particle-stabilized droplets were assessed in three independent experimental examinations, namely temperature, acoustic, and ultrasonic standing wave tests. During the acoustic droplet vaporization (ADV) process, droplets were converted to gas-filled microbubbles, offering enhanced visualization by ultrasound. The acoustic pressure threshold of about 0.62 MPa was identified for the cellulose-stabilized droplets. A phase transition temperature of about 22 °C was observed, at which a significant fraction of larger droplets (above ca. 3 μm in diameter) were converted into bubbles, whereas a large part of the population of smaller droplets were stable up to higher temperatures (temperatures up to 45 °C tested). Moreover, under ultrasound standing wave conditions, droplets were relocated to antinodes demonstrating the behavior associated with the negative contrast particles. The combined results make the CNF-stabilized droplets interesting in cell-droplet interaction experiments and ultrasound imaging.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
Keyword
- Bubbles (in fluids)
- Cellulose
- Elastic waves
- Nanocellulose
- Nanofibers
- Physicochemical properties
- Ultrasonic imaging
- Ultrasonic testing
- Vaporization
- Acoustic droplet vaporization
- Cellulose nanofibers
- Droplet interaction
- Environmentally benign
- Experimental examination
- Narrow size distributions
- Ultrasonic standing waves
- Ultrasound standing waves
- Drops
Publication and Content Type
- ref (subject category)
- art (subject category)
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