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Strukturne in sorpcijske lastnosti obdelanih regeneriranih celuloznih vlaken : doktorska disertacijaPeršin Fratnik, ZdenkaSorpcijske lastnosti regeneriranih celuloznih vlaken so odvisne od strukturnih parametrov in postopkov predobdelave. Predmet raziskav so bila viskozna, modalna in liocel vlakna, ki so bila obdelana z ... različnimi postopki obdelav (alkalno pranje, beljenje in luženje). Namen dela je bil ugotoviti spremembe strukturnih parametrov, reaktivnosti in sorpcijskih lastnosti vlaken v odvisnosti od postopkov obdelav. Za preizkušanje so se uporabile sodobne metode, ki na področju vpliva postopkov predobdelav na preiskovana vlakna še niso bile uporabljene. Spremembe v nadmolekulski strukturi vlaken so raziskane s pomočjo rentgenske strukturne analize, vpliv obdelav na sistem praznin pa določen s kolonsko izključitveno kromatografijo. Razlike v strukturi vlaken se odražajo tudi v različni dostopnosti reaktivnih mest v vlaknih, kar je podano s površinsko prosto energijo ter disociacijskimi lastnostmi. Površinska prosta energija se je določila s pomočjo tenziometrije, disociacijske lastnosti pa z vsebnostjo karboksilnih skupin, izmerjenih s kompleksometrično titracijo. Sorpcijske lastnosti vlaken po predobdelavi so bile določene z difuzijo različno velikih molekul reagenta. Stopnja kristaliničnosti se zobdelavami poveča, kar potrjuje tudi JAŠ, ob hkratnem nespremenjenem sistemu praznin. Reaktivne skupine (COOH) korelirajo s kristaliničnostjo in nimajo vpliva na sorpcijsko obnašanje vlaken. Kljub višji stopnji kristaliničnosti in manjšemu številu karboksilnih skupin so vlakna po obdelavi hidrofilnejša in kažejo večje sorpcijske sposobnosti navzemanja velikih in malih molekul re agenta (voda, direktna barvila). Pojav povezujemo s spremembo dostopnosti aktivnih površin v modificirani morfološki zgradbi vlaken.Type of material - dissertation ; adult, seriousPublication and manufacture - Maribor : [Z. Peršin], 2004Language - slovenianCOBISS.SI-ID - 9212182
Author
Peršin Fratnik, Zdenka
Other authors
Stana-Kleinschek, Karin |
Sfiligoj-Smole, Majda
Topics
viskozna vlakna |
modalna vlakna |
liocel vlakna |
alkalno pranje |
beljenje |
luženje |
praznine |
sorpcija |
WAXS |
SAXS |
SEC
Library | Call number – location, accession no. ... | Copy status |
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Central Technological Library of the University of Ljubljana | 59287/213 Skladišče IN: 320040301 |
available - outside loan, loan period: 14 days |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Peršin Fratnik, Zdenka | 19268 |
Stana-Kleinschek, Karin | 07814 |
Sfiligoj-Smole, Majda | 04171 |
Source: Personal bibliographies
and: SICRIS
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