A strategy to evaluate the surface energy of high packing efficiency fine powders via inverse gas chromatography Tan, G, Qu, L, Morton, David and Larson, I 2017, A strategy to evaluate the surface energy of high packing efficiency fine powders via inverse gas chromatography, Powder Technology, vol. 320, pp. 470-473, doi: 10.1016/j.powtec.2017.07.078. Attached Files Name Description MIMEType Size Downloads Title A strategy to evaluate the surface energy of high packing efficiency fine powders via inverse gas chromatography Author(s) Tan, G Qu, L Morton, David orcid.org/0000-0002-1491-6517 Larson, I Journal name Powder Technology Volume number 320 Start page 470 End page 473 Total pages 4 Publisher Elsevier Place of publication Amsterdam, The Netherlands Publication date 2017-10 ISSN 0032-5910 1873-328X Keyword(s) Powder Surface energy High packing efficiency Low porosity Inverse gas chromatography Over-pressure Summary © 2017 The determination of the surface energy of free-flowing fine powders through IGC analysis can be technically challenging. These powders can have high packing efficiencies that can often lead to excessive gas pressure build up as the mobile phase passes through the stationary phase. As such, free-flowing fine powders may not necessarily be readily suitable to form the stationary phase of an IGC system. To alleviate this challenge, large carrier particles, in the form of silanized glass powders, can be blended with the free-flowing fine powder, in a manner that aids in disrupting the packing efficiency. However, the major concern here is that the introduced foreign material can potentially interfere with the probing of the sample of interest. This research found that blending 250 μm silanized glass beads with a free-flowing fine powder can effectively reduce the pressure build up to prevent the system from over-pressuring. Additionally, it was observed that there is a critical mass for the sample of interest. Below this critical mass, the introduction of the carrier particles can interfere with the determination of the surface energy of the sample, where the surface energy was underestimated. However, above this critical mass, the introduction of the carrier particle does not significantly influence the surface energy determination of the sample of interest. It is therefore concluded that blending free-flowing fine powders with large carrier particles is a potential approach to resolve the challenge of over-pressured systems, provided the mass of the powder of interest is above the critical mass for that powder. Language eng DOI 10.1016/j.powtec.2017.07.078 Field of Research 0904 Chemical Engineering 0913 Mechanical Engineering HERDC Research category C1.1 Refereed article in a scholarly journal Persistent URL http://hdl.handle.net/10536/DRO/DU:30132608 Document type: Journal Article Collections: Faculty of Science, Engineering and Built Environment School of Engineering Related Links Link Description Connect to published version Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Wed, 27 Nov 2019, 09:11:04 EST Thu, 28 Nov 2019, 04:00:52 EST Thu, 28 Nov 2019, 05:05:09 EST Fri, 01 May 2020, 11:07:08 EST Fri, 01 May 2020, 11:08:12 EST Fri, 01 May 2020, 11:08:53 EST Sat, 17 Oct 2020, 01:31:42 EST Filtered Full Citation counts:   Cited 1 times in TR Web of Science Cited 1 times in Scopus Search Google Scholar Access Statistics: 78 Abstract Views, 1 File Downloads  -  Detailed Statistics Created: Wed, 27 Nov 2019, 09:11:04 EST

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