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Positron annihilation lifetime spectroscopy of mechanically milled protein fibre powders and their free volume aspects

conference contribution
posted on 2012-01-01, 00:00 authored by Kiran 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.



International Conference on Positron Annihilation (16th : 2012 : Bristol, England)


1 - 6


IOP Publishing


Bristol, England

Place of publication

[Bristol, England]

Start date


End date




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