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

K. Patil, S. Sellaiyan, R. Rajkhowa, T. Tsuzuki, T. Lin, S. V. Smith, X. Wang, A. Uedono

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish
Article number012054
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished or Issued - 2013
Externally publishedYes
Event16th International Conference on Positron Annihilation, ICPA 2012 - Bristol, United Kingdom
Duration: 19 Aug 201224 Aug 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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