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Reports from University of Oulu Highlight Recent Findings in Nanocrystals (Amphiphilic Cellulose Nanocrystals from Acid-Free Oxidative Treatment:...

August 22, 2014



Reports from University of Oulu Highlight Recent Findings in Nanocrystals (Amphiphilic Cellulose Nanocrystals from Acid-Free Oxidative Treatment: Physicochemical Characteristics and Use as an Oil-Water Stabilizer)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Nanocrystals have been published. According to news reporting from Oulu, Finland, by NewsRx journalists, research stated, "A chemical pretreatment for producing cellulose nanocrystals (CNCs) with periodate oxidation and reductive amination is reported. This new functionalization of cellulose fibers dispenses an alternative method for fabricating individual CNCs without the widely used acid hydrolysis process."

The news correspondents obtained a quote from the research from the University of Oulu, "CNCs can be directly modified during the pretreatment step, and no additional post-treatments are required to tune the surface properties. Three butylamine isomers were tested to fabricate CNCs with amphiphilic features. After mechanical homogenization, CNCs occurred as individual crystallinities without aggregation where high uniformity in terms of shape and size was obtained. The elemental analysis and H-1 NMR measurement show that iso-and n-butylamine attach the highest number of butylamino groups to the cellulose fibers. Linking the alkyl groups increases the hydrophobic nature of the CNCs, where water contact angles from self-standing films up to 110.5 degrees are reported."

According to the news reporters, the research concluded: "Since these butylamino-functionalized CNCs have hydrophobic characteristics in addition to the hydrophilic backbone of cellulose, the stabilization impact on oil/water emulsions is demonstrated as a potential application."

For more information on this research see: Amphiphilic Cellulose Nanocrystals from Acid-Free Oxidative Treatment: Physicochemical Characteristics and Use as an Oil-Water Stabilizer. Biomacromolecules, 2014;15(7):2769-2775. Biomacromolecules can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Biomacromolecules - www.pubs.acs.org/journal/bomaf6)

Our news journalists report that additional information may be obtained by contacting M. Visanko, University of Oulu, Dept. of Chem, FI-90014 Oulu, Finland. Additional authors for this research include H. Liimatainen, J.A. Sirvio, J.P. Heiskanen, J. Niinimaki and O. Hormi (see also Nanocrystals).

Keywords for this news article include: Oulu, Europe, Finland, Nanotechnology, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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