High-pressure Treatment of DMAc/LiCl Swollen Softwood Pulp
| Autor: | Lippo V.J. Lassila, Dennis Kronlund, Pedro Fardim, Jasmina Obradovic, Patrick Navard |
|---|---|
| Přispěvatelé: | Laboratory of Fibre and Cellulose Technology, Åbo Academy University, Department of Prosthetic Dentistry & Biomaterials Research, University of Turku, Centre de Mise en Forme des Matériaux (CEMEF), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Abo Akad Univ, Phys Chem Lab, Åbo Akademi University [Turku], Abo Akad Univ, Ctr Funct Mat |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Softwood Materials science High-pressure 030309 nutrition & dietetics Scanning electron microscope lcsh:Biotechnology Bioengineering Mechanical properties engineering.material [SPI.MAT]Engineering Sciences [physics]/Materials 03 medical and health sciences chemistry.chemical_compound 0404 agricultural biotechnology lcsh:TP248.13-248.65 medicine Cellulose Composite material Swelling Waste Management and Disposal Elastic modulus 0303 health sciences Micrograph Optical properties Pulp (paper) 04 agricultural and veterinary sciences 040401 food science Distilled water chemistry engineering medicine.symptom Compression moulding N-dimethylacetamide |
| Zdroj: | BioResources, Vol 10, Iss 2, Pp 2143-2155 (2015) Bioresources Bioresources, North Carolina State University, 2015, 10 (2), pp.2143-2155 ⟨10.15376/biores.10.2.2143-2155⟩ Scopus-Elsevier |
| ISSN: | 1930-2126 |
| Popis: | International audience; Swollen softwood cellulose pulp in a DMAc/LiCl solvent system was compressed under elevated pressure (up to 900 MPa) in a Bridgman anvil press. The influence of high pressure on two cellulose systems was studied by measuring X-ray diffraction, mechanical and optical properties and observing scanning electron micrographs of the morphology. Compressed swollen cellulose, washed with distilled water, had lower elastic modulus and hardness compared to swollen cellulose washed with a combination of 2-propanol and deionized water. This work showed that material with lower mechanical properties will be affected more by compression and will result in higher mechanical properties after pressure treatment. Transmitted light in the visible range for both systems was increased after elevated pressure was applied. The XRD measurements revealed the decrease of the cellulose crystallinity after high pressure treatment for all swollen cellulose samples. The morphology of the compacted samples showed noticeable differences between the compact smooth surface and the layered core. |
| Databáze: | OpenAIRE |
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