BF, Dept. of Wood Technology, Lj. (BFLES)
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Kinetika zamreževanja melamin-urea-formaldehidne smole z dodatkom nanofibrilirane celuloze : magistrsko delo = Curing kinetics of the melamine-urea-formaldehyde resin with the addition of nanofibrillated cellulose : M. Sc. thesisSitar, MaticV tem magistrskem delu smo z diferenčno dinamično kalorimetrijo spremljali utrjevanje melamin-urea-formaldehidne (MUF) smole z dodatkom treh različnih vrst nanoceluloze: z nanofibrilirano celulozo ... (NFC), TEMPO oksidirano NFC (TNFC) in z lignoceluloznimi nanofibrilami (LCNF). Kot katalizator smo uporabili 40 % raztopino amonijevega sulfata. Vzorce smo zamreževali v 100 in 40 (mikro)l aluminijastih lončkih pri različnih hitrostih segrevanja. V nekaterih primerih smo dodali tudi različne koncentracije nanoceluloze. Ugotovili smo, da MUF smola bolje zamrežuje z nanofibrilirano celulozo (NFC) kot s TEMPO oksidirano NFC (TNFC). Ne glede na količino in vrsto dodane nanceluloze, smo pri MUF smoli s katalizatorjem beležili praktično identične temperature in čase začetka zamreževanj ter doseženih temperatur eksotermnega vrha (Tmaks). Lignocelulozne nanofibrile (LCNF) pa z izbranim katalizatorjem niso kazale eksotermnih signalov, zato jih nadalje z MUF smolo nismo zamreževali. Z infrardečo spektroskopijo FT-IR ni bilo mogoče ugotoviti razlik v intenziteti trakov med vzorci MUF, MUF/NFC in MUF/TNFC, saj so bili FT-IR spektri med seboj zelo podobni. Predpostavljamo, da je bila koncentracija metilen-etrskih in metilenskih mostičkov med MUF in NFC/TNFC za identifikacijo s to metodo prenizka.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [M. Sitar], 2020Language - slovenianCOBISS.SI-ID - 29370627
Author
Sitar, Matic
Other authors
Poljanšek, Ida |
Oven, Primož
Topics
MUF smola |
nanoceluloza |
kinetika |
DSC |
DSC |
MUF resin |
nanocellulose |
kinetics |
DSC |
DSC
Call number – location, accession no. ... |
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Knjižnica BF za lesarstvo du2 0000000063 IN: 020200068 Knjižnica BF za lesarstvo du2 63 IN: 020200068 |
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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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Sitar, Matic | |
Poljanšek, Ida | 12041 |
Oven, Primož | 11223 |
Source: Personal bibliographies
and: SICRIS
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