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ŠTUDIJ LASTNOSTI VLAKEN IZ PERUTNINSKEGA PERJA
Andreja Križanec, 2011, bachelor thesis/paper

Abstract: Perutninsko perje je eden od zelo obremenjujočih odpadkov perutninske industrije, zato bo pomenil razvoj novih možnosti uporabe in predelave odpadnega perutninskega perja enega od najpomembnejših dosežkov te branže. Cilj diplomskega dela je bil raziskati lastnosti vlaken iz odpadnega perutninskega perja in ugotoviti na katerih področjih in za kakšne materiale/izdelke bi bila potencialno uporabna. Rezultati so pokazali, da je perutninsko preje po kemizmu zelo podobno volni. Osnovna razlika je v tem, da so reakcije v topilih in reagentih pri perju, zaradi kompaktnejše nadmolekulske strukture počasnejše in manj intenzivne kot pri volni. Perje pri standardni atmosferi navzema okrog 13 % manj vlage in po omakanju in centrifugiranju zadržuje okrog 12 % manj vode kot volna, ima nekoliko nižjo trdnost in je v povprečju mnogo tanjše od volne. Boljša odpornost na kemikalije in nabrekanje v vodi v primerjavi z volno, daje perju boljšo potencialno uporabnost za tehnične tekstilije in kompozite, kot so npr.: izolacijski in filtracijski materiali.
Keywords: perutninsko perje, keratin, volnena vlakna, higroskopičnost, kvalitativne analize
Published: 02.09.2011; Views: 1617; Downloads: 143
.pdf Full text (3,86 MB)

3.
The influence of enzymatic treatment on wool fibre properties using PEG-modified proteases
Suzana Jus, Marc Schroeder, Georg M. Gübitz, Elisabeth Heine, Vanja Kokol, 2007, original scientific article

Abstract: The main contribution of the presented work was to introduce the use of proteases modified with the soluble polymer polyethylene glycol (PEG) in the bio-finishing process of wool fibres, to target enzyme action to the outerparts of wool fibres, i.e. to avoid the diffusion and consequent destroying of the inner parts of the wool fibre structure, in the case of native proteases using. Different proteolytic enzymes from Bacillus lentus and Bacillus subtilis in native and PEG-modified forms were investigated and their influence on the modification of wool fibres morphology surface, chemical structure, as well as the hydrolysis of wool proteins, the physico-mechanical properties, and the sorption properties of 1:2 metal complex dye during dyeing were studied. SEM images of wool fibres confirmed smoother and cleaner fibre surfaces without fibre damages using PEG-modified proteases. Modified enzyme products have a benefit effect on the wool fibres felting behaviours (14%) in the case when PEG-modified B. lentus is used, without markedly fibre damage expressed by tensile strength and weight loss ofthe fibre. Meanwhile the dye exhaustion showed slower but comparable level of dye uptake at the end of the dyeing.
Keywords: volnena vlakna, proteolitski encimi, encimske modifikacije, sorpcija barve, morfologija vlaken, wool fibres, proteolytic enzymes, enzyme modification, felting, dye sorption, protein hydrolysis, XPS-analysis, fibre morphology
Published: 01.06.2012; Views: 1570; Downloads: 40
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