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Title:FUNKCIONALIZACIJA BOMBAŽNIH VLAKEN S KARBOKSIMETILCELULOZO
Authors:Mlakar, Mitja (Author)
Fras Zemljič, Lidija (Mentor) More about this mentor... New window
Stana Kleinschek, Karin (Co-mentor)
Files:.pdf VS_Mlakar_Mitja_2009.pdf (814,46 KB)
MD5: AE70D9EE1218F7FE4BF02F2D88CA7CD3
 
Language:Slovenian
Work type:Undergraduate thesis (m5)
Organization:FS - Faculty of Mechanical Engineering
Abstract:Bombaž je zaradi svojih lastnosti vsestransko uporaben. Neželene lastnosti, kot so krčenje, hidrofilnost/hidrofobnost in gorljivost, se lahko z različnimi plemenitilnimi postopki zmanjšajo. Na področju celuloznih materialov je znanih precej postopkov modifikacij z namenom spremembe funkcionalnosti celuloze. Mnogi postopki so okolju neprijazni, ali pa vodijo k neobstojnosti končnih materialov in k sočasnemu poslabšanju mehanskih lastnosti, kar zmanjšuje stopnjo uporabnosti končnega produkta. Obdelava celuloze z različnimi polisaharidi za dosego večje funkcionalnosti omogoča široko uporabnost končnega produkta. S kontroliranim spreminjanjem površinske funkcionalnosti vlaken je mogoče razviti učinkovitejše pogoje obdelave in s tem povečati izkoristek pomožnih sredstev in kemikalij ob povečani ali vsaj ohranjeni kakovosti končnega izdelka. V diplomski nalogi smo skušali dognati kako funkcionalizacija oz. modifikacija bombažnih vlaken s karboksimetilcelulozo vpliva predvsem na uporabne lastnosti bombaža, kot sta celokupni naboj vlaken ter hidrofilnost, hkrati pa podati ugotovitev, kako omenjena funkcionalizacija vpliva na uporabne lastnosti bombažnih vlaken. Rezultati so vzpodbudni, saj uporabljena topokemijska modifikacija bombažnih vlaken s karboksimetilcelulozo daje očitno zelo plodne rezultate. Je metoda, ki sočasno z zvišanjem celokupnega naboja ter hidrofilnega značaja vlaken, ohranja tudi nekatere mehanske lastnost vlaken. Glede na to, da so našteti parametri gonilna sila adsorptivnosti vlaken, je moč pričakovati izboljšano adsorpcijsko kapaciteto le-teh za številne specifične substrate, predvsem tiste kationskega značaja.
Keywords:bombažna vlakna, tenziometrija, stični kot, mehanske lastnosti, sorpcijske lastnosti, funkcionalizacija, konduktometrična titracija, naboj bombažnih vlaken, topokemijska modifikacija bombaža, adsorpcijska kapaciteta vlaken
Year of publishing:2009
Publisher:[M. Mlakar]
Source:Maribor
UDC:677.21.017(043.2)
COBISS_ID:13372438 New window
NUK URN:URN:SI:UM:DK:8UMMTSQM
Views:2491
Downloads:233
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FS
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Secondary language

Language:English
Title:FUNCTIONALIZATION OF COTTON FIBERS WITH CARBOXYMETHYLCELLULOSE
Abstract:Because of its properties cotton is very useful. Unwanted properties like shrinkage, hydrophility/hydrophobity and burning behaviour can be reduced by use of various finishing processes. In the field of cellulose materials there are many modification methods of changing the functionality of cotton. Many of these processes are environment unfriendly or lead to bad material fastness or to poor mechanical properties, which means a low applicability of the final product. Cellulose treatment with different polysaccharides gives good results in functionality and applicability. Controlled modification of surface functionality of fibres results in a more efficient treatment conditions, which means a better efficiency in use of chemicals with equal or even higher quality of final product. In the diploma work we discovered the influence of functionalization (modification) with carboxymethylcellulose on the properties of cotton, especially total charge and hydrophility of fibres and, on the other hand, the effect of mentioned modification on the applicable properties of the cotton fibres. The results are quite promising, as the topochemical modification with carboxymethylcellulose gives excellent results. It is the method that simultaneously gives higher total charge and hydrophility, preserving the mechanical properties of the cotton fibres. It is obvious that these parameters result in a better fibre adsorption capacity for the wide range of specific substrates, especially those with cationic character.
Keywords:Cotton fibres, Tensiometry, Contact Angle, mechanical properties, sorption properties, functionalization, conductometric titration, cotton fibre charge, topochemical modification of cotton, adsorption capacity of cotton


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