VPLIV SUŠENJA S HITOZANOM FUNKCIONALIZIRANIH VLAKEN NA NJIHOV PROTI-MIKROBNI ZNAČAJ

Fuks, Mateja

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Title:	VPLIV SUŠENJA S HITOZANOM FUNKCIONALIZIRANIH VLAKEN NA NJIHOV PROTI-MIKROBNI ZNAČAJ
Authors:	ID Fuks, Mateja (Author) ID Šauperl, Olivera (Mentor) More about this mentor... ID Kreže, Tatjana (Comentor)
Files:	UNI_Fuks_Mateja_2011.pdf (583,21 KB) MD5: CCB032F1F7FCEF508788787299059F65 PID: 20.500.12556/dkum/8aa4702a-058e-4d23-8a8f-310816fe8551
Language:	Slovenian
Work type:	Undergraduate thesis
Organization:	FS - Faculty of Mechanical Engineering
Abstract:	Za zaščito tekstilnih materialov pred delovanjem mikroorganizmov se uporabljajo različne proti-bakterijsko učinkovite spojine, vendar pa večina od teh ne zagotavlja potrebne varnosti za varovanje ljudi in okolja. Med naravnimi sredstvi s protimikrobnim delovanjem je hitozan ena izmed najbolj obetajočih proti-bakterijsko delujočih spojin sodobnega časa. V raziskavi smo uporabili različna celulozna vlakna, predvsem zato, ker je celuloza biološko razgradljiv substrat z dobro površinsko aktivnostjo. Poleg naravne celuloze - bombaža smo v eksperimentalno delo vključili tudi viskozo, liocel in modal kot predstavnike regeneriranih celuloznih vlaken, ki so v primerjavi z bombažem čistejši in zato še posebej zanimiv substrat za funkcionalizacijo s hitozanom. Za dosego optimalne zaščite tekstilnega materiala se predpostavlja da ima, poleg koncentracije hitozana, pomemben vpliv tudi temperatura sušenja, ki bi potencialno lahko vplivala na delež dostopnih aminskih skupin. V ta namen smo v kombinaciji z izbranima koncentracijama hitozana v impregnacijski kopeli skušali določiti optimalno temperaturo sušenja, s pomočjo katere bi bilo morda možno zagotoviti večji delež dostopnih aminskih skupin, ki predstavljajo aktivna mesta protimikrobnega delovanja. Glede na dejstvo, da se obravnavana celulozna vlakna razlikujejo po strukturi, je bil namen raziskave oceniti tudi vpliv nadmolekulske strukture na vezavo hitozana v odvisnosti od izbrane temperature sušenja. Za posamezno vrsto neobdelanih in s hitozanom funkcionaliziranih celuloznih vlaken smo določili vsebnost vlage, kot najpomembnejši kriterij naloge v smislu protimikrobne učinkovitosti pa smo izbrali delež dostopnih aminskih skupin. Tega smo ovrednotili s spektrofotometrično metodo C.I. Acid Orange VII. Rezultati kažejo odvisnost med temperaturo sušenja in deležem dostopnih aminskih skupin funkcionaliziranih vlaken, ki se spreminja glede na izbrano temperaturo sušenja.
Keywords:	hitozan, funkcionalizacija, celuloza, Acid orange VII, vsebnost vlage, aminske skupine
Place of publishing:	Maribor
Publisher:	[M. Fuks]
Year of publishing:	2011
PID:	20.500.12556/DKUM-18285
UDC:	677.027.16:579.61(043.2)
COBISS.SI-ID:	15128086
NUK URN:	URN:SI:UM:DK:DVXMNTLB
Publication date in DKUM:	31.05.2011
Views:	2711
Downloads:	165
Metadata:
Categories:	KTFMB - FS
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Secondary language

Language:	English
Title:	INFLUENCE OF DRYING TO THE FIBRES FUNCTIONALIZED WITH CHITOSAN
Abstract:	For the protection of textile materials against microbes different anti-bacterial effective compounds are appropriate, but most of them do not provide the necessary security to protect people and the environment. The natural antimicrobial active substance is chitosan which is one of the most promising anti-bacterial compounds of modern times. In this study we used various cellulose fibers, primarily because they are biodegradable and have good surface activity. In addition to natural cellulose – cotton, viscose, lyocell and modal as representatives of the regenerated cellulose fibers was also included in this experimental work. Regenerative fibers are in comparison to cotton cleaner and therefore particularly interesting substrate for the functionalization with chitosan. To achieve optimal protection of the textile materials is assumed that, in addition to the chitosan concentration, temperature of drying could also affect the proportion of available amino groups’. From this reason we tried to determine the optimal temperature of drying, by which it might be possible to provide a greater share of the available amino groups, which represent the active site of an antimicrobial activity. Given the fact that the present cellulose fibers differ in structure, the purpose of this study was also to assess the impact of supramolecular structure on the binding of chitosan as a function of selected drying temperature. For each type of raw and with chitosan functionalized cellulose fibers the moisture content was determined. As the most important criteria in terms of antimicrobial effectiveness we chose the proportion of available amino groups. This was evaluated by spectrophotometric method CI Acid Orange VII. The results show the dependence between the temperature of drying and the share of available amino groups of functionalized fibers, which varies depending on the temperature of drying.
Keywords:	chitozan, funnctionalization, celullulose, Acid orange VII, moisture content, amino groups

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