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

doi:10.1088/1742-6596/443/1/012054

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

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

Abstract

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 language	English
Article number	012054
Journal	Journal of Physics: Conference Series
Volume	443
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/443/1/012054
Publication status	Published - 2013
Event	16th International Conference on Positron Annihilation, ICPA 2012 - Bristol, United Kingdom Duration: 19 Aug 2012 → 24 Aug 2012

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title = "Positron annihilation lifetime spectroscopy of mechanically milled protein fibre powders and their free volume aspects",

abstract = "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.",

author = "K. Patil and S. Sellaiyan and R. Rajkhowa and T. Tsuzuki and T. Lin and Smith, {S. V.} and X. Wang and A. Uedono",

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journal = "Journal of Physics: Conference Series",

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T1 - Positron annihilation lifetime spectroscopy of mechanically milled protein fibre powders and their free volume aspects

AU - Patil, K.

AU - Sellaiyan, S.

AU - Rajkhowa, R.

AU - Tsuzuki, T.

AU - Lin, T.

AU - Smith, S. V.

AU - Wang, X.

AU - Uedono, A.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

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U2 - 10.1088/1742-6596/443/1/012054

DO - 10.1088/1742-6596/443/1/012054

M3 - Conference article

SN - 1742-6588

VL - 443

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012054

T2 - 16th International Conference on Positron Annihilation, ICPA 2012

Y2 - 19 August 2012 through 24 August 2012

ER -

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

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