Fabrication of ultrafine powder from eri silk through attritor and jet milling

Rajkhowa, Rangam, Wang, Lijing, Kanwar, Jagat and Wang, Xungai 2009, Fabrication of ultrafine powder from eri silk through attritor and jet milling, Powder technology, vol. 191, no. 1-2, pp. 155-163.

Attached Files
Name Description MIMEType Size Downloads

Title Fabrication of ultrafine powder from eri silk through attritor and jet milling
Author(s) Rajkhowa, Rangam
Wang, Lijing
Kanwar, Jagat
Wang, Xungai
Journal name Powder technology
Volume number 191
Issue number 1-2
Start page 155
End page 163
Total pages 9
Publisher Elsevier SA
Place of publication Lausanne, Switzerland
Publication date 2009-04-04
ISSN 0032-5910
1873-328X
Keyword(s) silk powder
milling
particle size
eri silk
fibre science
nanofibre
Summary Fibroin protein derived from silk fibres has been extensively studied with exciting outcomes for a number of potential advanced biomaterial applications. However, one of the major challenges in applications lies in engineering fibroin into a  desired form using a convenient production technology. In this paper, fabrication of ultrafine powder from eri silk is reported. The silk cocoons were degummed and the extracted silk fibres were then chopped into snippets prior to attritor and air jet milling. Effects of process control agents, material load and material to water ratio during attritor milling were studied. Compared to dry and dry–wet attritor milling, wet process emerged as the preferred option as it caused less colour change and facilitated easy handling. Ultrafine silk powder with a volume based particle size d(0.5) of around 700 nm could be prepared following the sequence of chopping ➔ wet attritor milling ➔ spray drying ➔ air jet milling. Unlike most reported powder production methods, this method could fabricate silk particles in a short time without any pre-treatment on degummed fibre. Moreover, the size range obtained is much smaller than that previously produced using standard milling devices. Reduction in fibre tenacity either shortened the milling time even further or helped bypassing media milling to produce fine powder directly through jet milling. However, such reduction in fibre strength did not help in increasing the ultimate particle fineness. The study also revealed that particle density and particle morphology could be manipulated through appropriate changes in the degumming process.

Graphical Abstract:  Fabrication of eri silk powder using attritor and jet milling is reported. Volume based particle size d(0.5) of around 700 nm could be prepared following the sequence chopping ➔ wet attritor milling ➔ spray drying ➔ air jet milling. No pre-treatments were used and the particle size range obtained is much smaller than that previously produced using standard milling devices. Particle density morphology could be manipulated through appropriate changes of cocoon degumming conditions.
Language eng
Field of Research 090406 Powder and Particle Technology
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2009
Copyright notice ©2008, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30022598

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
Connect to link resolver
 
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 31 times in TR Web of Science
Scopus Citation Count Cited 36 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 470 Abstract Views, 47 File Downloads  -  Detailed Statistics
Created: Tue, 19 Jan 2010, 13:54:01 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.