Structure and characteristics of milled silk particles

Kazemimostaghim,M, Rajkhowa,R, Patil,K, Tsuzuki,T and Wang,X 2014, Structure and characteristics of milled silk particles, Powder technology, vol. 254, pp. 488-493, doi: 10.1016/j.powtec.2014.01.060.

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Title Structure and characteristics of milled silk particles
Author(s) Kazemimostaghim,M
Rajkhowa,RORCID iD for Rajkhowa,R
Wang,XORCID iD for Wang,X
Journal name Powder technology
Volume number 254
Start page 488
End page 493
Publisher Elsevier BV
Place of publication Amsterdam, Netherlands
Publication date 2014-03
ISSN 0032-5910
Keyword(s) Bead mill
Ion adsorption
Silk nanoparticle
Silk particle characterization
Science & Technology
Engineering, Chemical
Summary This study examined the structure, thermal property, and ion adsorption of silk particles. The particles were prepared by attritor-bead mill combination, using alkaline (pH10) charge repulsion and surfactant steric repulsion methods. Both methods produced particles with a dominant β-sheet structure, similar to the silk fibre. There was no significant difference in the decomposition temperatures for either the silk fibre or the micro/nano silk particles. An important finding from this study is clear evidence of reduction of amorphous content during the final stage of powdering using the bead mill. As a result, despite reduction in β-sheet crystallites with the progressive milling, the relative β-sheet content actually increased during this process. However, intermolecular forces between the β-sheets reduced significantly and hence the XRD results showed significant reduction in crystallinity in nano silk particles but crystal forming segments remained with β-sheet conformations after milling. The structural change influenced the ion-adsorption property where particle-size reduction resulted in a significant increase in both the rate and volume of HCrO4- adsorption. © 2014 Elsevier B.V.
Language eng
DOI 10.1016/j.powtec.2014.01.060
Field of Research 090301 Biomaterials
091012 Textile Technology
090406 Powder and Particle Technology
Socio Economic Objective 860403 Natural Fibres
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID ARC DP1094979
Copyright notice ©2014, Elsevier BV
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