Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Hale Bahar Öztürk"'
Autor:
Ján Široký, Barbora Široká, Uttam C. Paul, Loan T.T. Vo, Avinash P. Manian, Hossam Soliman, Hale Bahar Öztürk, Hai Vu-Manh, Thomas Bechtold
Publikováno v:
Carbohydrate Polymers. 93:316-323
The structure of cellulose is characterised by extensive non-covalent interactions. Recent discussions suggest that hydrophobic interactions between polymer chains also play a significant role in governing cellulose solubility. Surprisingly in almost
Publikováno v:
Carbohydrate Polymers. 87:195-201
Dynamic rheology, UV/VIS spectrometry with temperature programming cuvette and reaction calorimetry were conducted on cellulose pulp/FeTNa (NaOH solution containing ferric tartaric acid complex) solutions to investigate their thermostability and spin
Publikováno v:
Industrial & Engineering Chemistry Research. 50:9087-9094
Lyocell fibers, regenerated cellulosic fibers spun from cellulose/N-methylmorpholine-N-oxide hydrate solution by wet spinning, were treated with LiOH aqueous solution at concentrations of up to 7.5 M to study the inter- and intrafibrillar changes. Wi
Publikováno v:
Carbohydrate Polymers. 82:1068-1073
Morphological changes of modal fibers swollen in FeTNa (Fe–tartaric acid–NaOH complex solution) were investigated by means of microscopy. FeTNa solutions had a constant molar ratio of 1:3.28 for Fe:tartaric acid. In FeTNa solutions, Fe and free N
Publikováno v:
Carbohydrate Polymers. 82:761-767
Changes in the Inter- and Intra- Fibrillar Structure of Lyocell (TENCEL®) Fibers after KOH Treatment
Autor:
Hale Bahar Öztürk, Bill MacNaughtan, Mohammad Abu-Rous, K. Christian Schuster, Thomas Bechtold, John R. Mitchell
Publikováno v:
Macromolecular Symposia. 294:24-37
Lyocell fibers were treated with KOH up to 8 M which was demonstrated to distribute homogeneously at the outer zones of fiber cross section compared to NaOH which accesses more deeply but less homogenously. Both NaOH and KOH solutions can be used to
Publikováno v:
Materials Research Innovations. 14:224-230
Lyocell fibres were treated with tetramethylammonium hydroxide (TMAH) up to 1·5M, which was demonstrated to be more effective than LiOH, NaOH and KOH treatments at the same concentration in the sole interfibrillar swelling region. The porous structu
Publikováno v:
Cellulose. 17:521-532
Swelling properties of lyocell fibers in FeTNa (ferric tartaric acid complex) solutions were studied. Concentrations of Fe and free NaOH in FeTNa were varied, while the ratio between FeCl3.6H2O: tartaric acid was kept constant as 1:3.28. The concentr
Autor:
Thomas Rosenau, John R. Mitchell, Thomas Bechtold, Bill MacNaughtan, Hale Bahar Öztürk, Antje Potthast, K. Christian Schuster, Mohammad Abu-Rous
Publikováno v:
Cellulose. 16:37-52
Some effects of NaOH treatment at concentrations of up to 8 M on (1) the porous structure, (2) the degree of swelling, (3) carboxyl content using methylene blue sorption and 9H-fluoren-2-yl-diazomethane (FDAM) methods, (4) dyeing, (5) the molecular w
Autor:
Thomas Bechtold, Hale Bahar Öztürk
Publikováno v:
Cellulose. 15:101-109
The splitting tendency of viscose and modal fibers in aqueous alkali solutions of LiOH, NaOH, KOH and TMAH was investigated. The viscose fibers splitted up to 5–7 fibrils, whereas modal fibers splitted up to 2–4 fibrils depending on alkali type a