Browsing by Author "Oksman, Kristiina"

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    Cellulose filaments derived from dissolution and spinning of paper sludge nanofibers using an ionic liquid Item
    (Cranfield University, 2020-04-17 09:08) Adu, Cynthia; Zhu, Chenchen; Jolly, Mark R.; Oksman, Kristiina; Eichhorn, Stephen J.; Richardson, Robert
    Dataset posted on 2020-04-17, 10:08 authored by Cynthia Adu, Chenchen Zhu, Mark Jolly, Kristiina Oksman, Stephen J. Eichhorn, Robert M. Richardson, Kevin D. Potter This data set contains results from the experimental test conducted to dissolve and spin cellulose nanofibres into filaments. The CNF was derived from paper mill sludge by mechanical grinding and dissolved in ionic liquid at 9 and 12% CNF concentration. Fibre pinning was conducted by dry-jet wet spinning method to produce filaments with average tensile strength of 19 GPa and 26 GPa, and modulus of 223 MPa and 282 MPa respectively. Enclose is the data from the tensile tests, rheology of the spinning solution and the filament orientation obtained from the wide angle x-ray of the filament.
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    Properties of cellulose nanofibre networks prepared from nevEr-dried and dried paper mill sludge
    (Cranfield University, 2018-08-15 11:11) Adu, Cynthia; Jolly, Mark R.; Oksman, Kristiina; Zhu, Chenchen; Berglund, Linn; J. Eichhorn, Stephen
    The data enclosed is the data used in the paper "Properties of cellulose nanofibre networks prepared from never-dried and dried paper mill sludge". The raw data from tensile tests of cellulose nanofibres prepared from paper mill sludge is attached including the x-ray diffraction pattern of the material
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    ItemOpen Access
    Properties of cellulose nanofibre networks prepared from never-dried and dried paper mill sludge
    (Elsevier, 2018-06-27) Adu, Cynthia; Berglund, Linn; Oksman, Kristiina; Eichhorn, Stephen J.; Jolly, Mark R.; Zhu, Chenchen
    Paper mills yield large volumes of sludge materials which pose an environmental and economic challenge for disposal, despite the fact that they could be a valuable source for cellulose nanofibres (CNF) production. The aim of the study was to evaluate the production process and properties of CNF prepared by mechanical fibrillation of never-dried and dried paper mill sludge (PMS). Atomic force microscopy (AFM) showed that average diameters for both never-dried and dried paper sludge nanofibres (PSNF) were less than 50 nm. The never-dried and dried sludge nanofibres showed no statistical significant difference (p > 0.05) in strength ∼92 MPa, and ∼85 MPa and modulus ∼11 GPa and ∼10 GPa. The study concludes that paper mill sludge can be used in a dried state for CNF production to reduce transportation and storage challenges posed on industrial scale.