Positron annihilation lifetime spectroscopy of mechanically milled protein fibre powders and their free volume aspects
conference contribution
posted on 2012-01-01, 00:00authored byKiran Patil, S Sellaiyan, Rangam RajkhowaRangam Rajkhowa, Takuya Tsuzuki, Tong Lin, S Smith, Xungai Wang, A Uedono
The present study reports the fabrication of ultra-fine powders from animal protein fibres such as cashmere guard hair, merino wool and eri silk along with their free volume aspects. The respectively mechanically cleaned, scoured and degummed cashmere guard hair, wool and silk fibres were converted into dry powders by a process sequence: Chopping, Attritor Milling, and Spray Drying. The fabricated protein fibre powders were characterised by scanning electron microscope, particle size distribution and positron annihilation lifetime spectroscopy (PALS). The PALS results indicated that the average free volume size in protein fibres increased on their wet mechanical milling with a decrease in the corresponding intensities leading to a resultant decrease in their fractional free volumes.
History
Event
International Conference on Positron Annihilation (16th : 2012 : Bristol, England)
Pagination
1 - 6
Publisher
IOP Publishing
Location
Bristol, England
Place of publication
[Bristol, England]
Start date
2012-08-19
End date
2012-08-24
Language
eng
Publication classification
E1 Full written paper - refereed
Copyright notice
2012, IOP Publishing
Title of proceedings
ICPA-16 2012 : Proceedings of the 16th International Conference on Positron Annihilation