scholarly journals Characterization of Natural Consolidated Halloysite Nanotube Structures

Minerals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1308
Author(s):  
Jiaqi Jin ◽  
Shoeleh Assemi ◽  
Hassnain Asgar ◽  
Greeshma Gadikota ◽  
Thang Tran ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Pore Size ◽  
Total Porosity ◽  
Surface Characteristics ◽  
X Ray ◽  
Network Information ◽  
Non Invasive ◽  
X Ray Scattering ◽  
Confined Fluid ◽  
X Ray Computed

Halloysite is a unique 1:1 clay mineral frequently appearing with nanotubular morphology, and having surfaces of different polarity with interesting and important technological applications. HNTs can be consolidated naturally in the earth by pressure and thermal flows. In this study of natural consolidated HNTs, the strength and hardness of these materials were found to be dependent on the presence of impurities (gibbsite, alunite, quartz, and other silica minerals), which accounted for the increased stability of such samples. In the absence of impurities, the strength of consolidated HNTs was significantly lower. The first 3D mapping of the pore structure of natural consolidated HNT is provided. The contributions of the porosity within the nanotubes and between the nanotubes were delineated using a combination of non-invasive ultra-small and small-angle X-ray scattering (USAXS/SAXS) analyses, BET/BJH pore size analyses, and computed tomography studies. A total porosity of 40%, as determined by X-ray attenuation and He porosimetry, was found for the natural consolidated HNTs, of which about one-third was due to the inter-HNT porosity. Nano-X-ray computed tomography (nano-XCT) analyses also indicated that 76% of the inter-HNT pores were smaller than 150 nm in diameter. The intra-HNT pore size determined by combined USAXS/SAXS and BET/BJH was about 10 nm. This pore network information is essential for the utilization of natural consolidated HNTs as a model geomaterial to investigate the effects of surface characteristics on confined fluid flow.

Non-invasive investigation of the cross-sectional solids distribution in CFB risers by X-ray computed tomography

2016 ◽  
Vol 297 ◽  
pp. 247-258 ◽  
Author(s):  
Timo Hensler ◽  
Markus Firsching ◽  
Juan Sebastian Gomez Bonilla ◽  
Thorsten Wörlein ◽  
Norman Uhlmann ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cross Sectional ◽  
X Ray ◽  
Non Invasive ◽  
X Ray Computed ◽  
The Cross

scholarly journals Pore structure characterization of oak via X-ray computed tomography

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 3053-3063
Author(s):  
Liangyan Guo ◽  
Hongchao Cheng ◽  
Junfeng Chen ◽  
Wentao Chen ◽  
Jingyao Zhao
Keyword(s):  
Computed Tomography ◽  
Pore Structure ◽  
Pore Size ◽  
Three Dimensional ◽  
Structure Characterization ◽  
X Ray ◽  
Volume Porosity ◽  
Pore Area ◽  
X Ray Computed ◽  
Area And Volume

The microscopic pore structure of wood is an important factor that affects its macroscopic properties. In this study, an oak sample was used for pore structure characterization. X-ray computed tomography imaging was carried out, and the scanning results (a multi-layer two-dimensional planar image) were rendered using Avizo software (a three-dimensional stereo image). A digital image processing method was used to identify the characteristics of the three-dimensional pore structure features and to calculate the characteristic parameters, i.e., the porosity (volume/surface), pore area and volume, pore size distribution, and the connectivity. The 27 mm3 oak sample had the following characteristics: a pore size which ranged from 8.56 µm to 1262.84 µm; a pore volume of 1.01 × 1010 µm3; a pore area and volume porosity of 1.12 × 109 µm2 and 37.6%, respectively; a surface porosity range of approximately 36.1% to 39.1%; a pore diameter for axial connection ranging from approximately 164.57 µm to 1262.84 µm; and had corresponding proportions of the pore area and volume of approximately 74.4% and 67.3%, respectively. This information provided useful structural data for the construction of future models.

Eye formation in semi-hard cheese: X-ray computed tomography as a non-invasive tool for assessing the influence of adjunct lactic acid bacteria

2013 ◽  
Vol 93 (2) ◽  
pp. 135-149 ◽  
Author(s):  
Dominik Guggisberg ◽  
Marie-Therese Fröhlich-Wyder ◽  
Stefan Irmler ◽  
Mark Greco ◽  
Daniel Wechsler ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
X Ray ◽  
Non Invasive ◽  
X Ray Computed ◽  
Eye Formation ◽  
Hard Cheese

Non-invasive and Time-Resolved Observation of Tumors Implanted in Living Mice by Using Phase-Contrast X-ray Computed Tomography

2006 ◽  
Vol 45 (3A) ◽  
pp. 1864-1868 ◽  
Author(s):  
Akio Yoneyama ◽  
Nobuaki Amino ◽  
Masamichi Mori ◽  
Masafumi Kudoh ◽  
Tohoru Takeda ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Phase Contrast ◽  
Time Resolved ◽  
X Ray ◽  
Non Invasive ◽  
X Ray Computed

Influence of non-invasive X-ray computed tomography (XRCT) on the microbial community structure and function in soil

2013 ◽  
Vol 93 (2) ◽  
pp. 121-123 ◽  
Author(s):  
Doreen Fischer ◽  
Sebastian Pagenkemper ◽  
Jens Nellesen ◽  
Stephan Peth ◽  
Rainer Horn ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Structure And Function ◽  
X Ray ◽  
Non Invasive ◽  
X Ray Computed ◽  
And Function

Burrow refilling behavior of Aporrectodea turgida (Eisen) and Lumbricus terrestris L. as revealed by X-ray computed tomography scanning: Graphical and quantitative analyses

2015 ◽  
Vol 95 (3) ◽  
pp. 231-235 ◽  
Author(s):  
Joann K. Whalen ◽  
Liwen Han ◽  
Pierre Dutilleul
Keyword(s):  
Computed Tomography ◽  
Lumbricus Terrestris ◽  
Undisturbed Soil ◽  
X Ray ◽  
Non Invasive ◽  
Computed Tomography Scanning ◽  
X Ray Computed ◽  
Quantitative Analyses ◽  
Undisturbed Soil Cores ◽  
Tomography Scanning

Whalen, J. K., Han L. and Dutilleul, P. 2015. Burrow refilling behavior of Aporrectodea turgida (Eisen) and Lumbricus terrestris L. as revealed by X-ray computed tomography scanning: Graphical and quantitative analyses. Can. J. Soil Sci. 95: 231–235. Solute and gas transport through earthworm burrows is altered when burrows become refilled. Earthworm burrow refilling was evaluated with non-invasive X-ray computed tomography in undisturbed soil cores. Proportionally, Lumbricus terrestris refilled burrows had more air-filled space left around their perimeter than those of Aporrectodea turgida, which often were completely refilled.

Sign in / Sign up

Export Citation Format

Share Document