A new device for coating single particles under controlled conditions

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Ström, Daniel,1971Chalmers tekniska högskola,Chalmers University of Technology (author)

A new device for coating single particles under controlled conditions

Article/chapterEnglish2005

Publisher, publication year, extent ...

Elsevier BV,2005

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LIBRIS-ID:oai:lup.lub.lu.se:ccb012c6-6740-4ca4-b82d-4106f71e00a3
https://lup.lub.lu.se/record/235891URI
https://doi.org/10.1016/j.ces.2005.03.026DOI
https://research.chalmers.se/publication/10805URI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

Notes

A new device for coating a single levitated particle in a controllable environment is designed and tested. This enables fluidized bed processing to be simulated experimentally on a single-particle level. The device consists of a coating chamber, which contains a capillary tube for levitating the particle, a micro-dispenser for producing discrete drops of controlled size and velocity and a device for supplying gas with specified temperature and humidity. The coating chamber consists of two parts, a confined space where the particle is levitated and a droplet insertion cone where the coating solution is injected into the particle suspending gas flow. A capillary with a well-defined diameter connects the droplet insertion cone and the area where the particle is levitated. The device is equipped with a piezo-actuated flow-through micro-dispenser that has the ability to produce discrete droplets with high reproducibility in terms of droplet size and velocity. The gas required for the coating process is taken from a gas container where the water content is analysed and kept at a minimum. A liquid flow is then introduced into the gas flow at a well-defined flow rate, mixed and evaporated in a three-way mixing vault. The humidified gas flow is then split into two separate flows; a suspending gas flow and a protecting gas flow for the inside of the coating chamber. The device is equipped with a high-speed video camera for monitoring both droplet production and droplet impact. Temperatures and flow rates throughout the device are measured and logged. Preliminary results show the influence of solvent, gas quality and coating procedure on the quality of the coating.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Medicinteknik hsv//swe
ENGINEERING AND TECHNOLOGY Medical Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Kemiteknik hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering hsv//eng
coating
drying
particle
fluidization
Wurster

Added entries (persons, corporate bodies, meetings, titles ...)

Karlsson, SChalmers tekniska högskola,Chalmers University of Technology (author)
Folestad, S (author)
Bjorn, I N (author)
Laurell, ThomasLund University,Lunds universitet,Avdelningen för Biomedicinsk teknik,Institutionen för biomedicinsk teknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Biomedical Engineering,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)elma-tla (author)
Nilsson, JohanLund University,Lunds universitet,Avdelningen för Biomedicinsk teknik,Institutionen för biomedicinsk teknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Biomedical Engineering,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)elma-jni (author)
Rasmuson, Anders,1951Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)rasmuson (author)
Chalmers tekniska högskolaAvdelningen för Biomedicinsk teknik (creator_code:org_t)

Related titles

In:Chemical Engineering Science: Elsevier BV60, s. 4647-46530009-2509
In:Chemical Engineering Science: Elsevier BV60, s. 4647-4653

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Medical Engineer ...

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