Funkcionalizacija bombažnih vlaken s karboksimetilcelulozo

diplomsko delo

Mitja Mlakar (Author), Lidija Fras Zemljič (Mentor), Karin Stana-Kleinschek (Co-mentor)

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;

Data

Language:	Slovenian
Year of publishing:	2009
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	[M. Mlakar]
UDC:	677.21.017(043.2)
COBISS:	13372438
Views:	2609
Downloads:	242
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Functionalization of cotton fibers with carboxymethylcellulose
Secondary 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.
Secondary keywords:	cotton fibres;tensiometry;contact angle;mechanical properties;sorption properties;functionalization;conductometric titration;cotton fibre charge;topochemical modification of cotton;adsorption capacity of cotton;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za strojništvo, Tekstilstvo
Pages:	X, 41 f.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;various industries;trades and crafts;razne industrije;obrti in rokodelstva;textile industry;tekstilna industrija;vegetable hairs;semenska vlakna;
ID:	986963