Journal
BIOMACROMOLECULES
Volume 13, Issue 5, Pages 1592-1597Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bm300319m
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Funding
- Academy of Finland [250940]
- Academy of Finland (AKA) [250940, 250940] Funding Source: Academy of Finland (AKA)
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Sequential regioselective periodate-chlorite oxidation was employed as a new and efficient pretreatment to enhance the nanofibrillation of hardwood cellulose pulp through homogenization. The oxidized celluloses with carboxyl contents ranging from 0.38 to 1.75 mmol/g could nanofibrillate to highly viscous and transparent gels with yields of 100-85% without clogging the homogenizer (one to four passes). On the basis of field-emission scanning electron microscopy images, the nanofibrils obtained were of typical widths of approximately 25 +/- 6 nm. All of the nanofibrillar samples maintained their cellulose I crystalline structure according to wide-angle X-ray diffraction results, and the crystallinity index was approximately 40% for all samples.
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