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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 orcid.org/0000-0002-6811-9126
Patil,K
Tsuzuki,T
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
1873-328X
Keyword(s) Bead mill
Ion adsorption
Silk nanoparticle
Silk particle characterization
Science & Technology
Technology
Engineering, Chemical
Engineering
FIBROIN MICROPARTICLES
SECONDARY STRUCTURE
DRUG-DELIVERY
FINE POWDER
IN-VITRO
ERI SILK
PROTEIN
CONFORMATION
SPECTROSCOPY
SCAFFOLDS
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
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070508

Document type: Journal Article
Collection: Institute for Frontier Materials
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