Hidroliza reaktivnih barvil pri barvanju lanu v odvisnosti od vrste procesa

Darinka Fakin (Author), Alenka Ojstršek (Author), Aleš Doliška (Author)

Abstract

Lanena vlakna (Linum ussitatissimum) spadajo v skupino naravnih celuloznih vlaken, njihova kakovost pa je odvisna od sorte lanu, postopkov ločevanja vlaken od drugih delov stebla, predobdelave, barvanja in postopkov plemenitenja. Kadar laneni izdelki zahtevajo vrhunske obstojnosti, uporabljamo za barvanje reaktivna barvila, ki jih odlikujejo razmeroma enostaven postopek barvanja, briljantni barvni toni ter zaradi nastanka kovalentnih vezi med vlaknom in barvilom tudi dobre mokre obstojnosti. Postopki predobdelave in beljenja lanenih vlaken vplivajo zaradi razgradnje primesi na hidrofilnost, hkrati pa tudi na fizikalno- kemijske in barvalne lastnosti vlaken. Kinetične in termodinamične zakonitosti procesa barvanja le-teh so odvisne tudi od kemijske strukture barvil, različnih tehnoloških postopkov in parametrov barvanja. Pogosto težavo pri barvanju z reaktivnimi barvili predstavlja močna obarvanost odpadnih barvalnih kopeli, kar je predvsem posledica hidrolize reaktivnih barvil med procesom barvanja. Zato smo se v raziskavi osredotočili na vpliv postopka barvanja (izčrpavanje in impregnacija) in reaktivnega sistema barvil na hidrolizo reaktivnih barvil pri barvanju lanene tkanine. Iz rezultatov dela izhaja, da je količina hidroliziranih in nevezanih barvil odvisna od vrste barvila, njegove kemijske strukture, velik pomen pa ima tudi primeren izbor postopka barvanja.

Keywords

lan;barvanje lanu;vinilsulfonska reaktivna barvila;bireaktivna barvila;hidroliza;spektroskopija;barvna metrika;

Data

Language:	Slovenian
Year of publishing:	2007
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
UDC:	677.11.027.423.4
COBISS:	12025878
ISSN:	0351-3386
Parent publication:	Tekstilec
Views:	682
Downloads:	85
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Hydrolysis of reactive dyes in flax dyeing, depending on the type of process
Secondary abstract:	Flax fibres (Linum ussitatissimum) belong to the group of natural cellulose fibres, and their qualities depend on the flax species, fibre/ steam parts' separation methods, pre-treatment, dyeing and finishing. When flax garments need to have top-colour fastness, reactive dyes are used for dyeing. Reactive dyes are simple to use and produce brilliant hues, with good wet-colour fastness due to the covalent bonds between the fibres and the dye. Pre-treatment and bleaching of flax fibres influences their hydrophilicity, physicalchemical, and dyeing properties. The kinetic and thermodynamic nature of a dyeing process also depends on the dye's chemical structure, various technological procedures, and the dyeing parameters. A common problem resulting from reactive dyeing is highly-colourated waste dye-baths that result from dye hydrolysis during the dyeing procedure. Therefore, the presentresearch focused on the influences of two dyeing processes (exhaustion and impregnation) and two reactive dye systems on dye hydrolysis during flax fabric dyeing. The obtained results indicated that the amount of hydrolysed and unbound dyes depends primarily on the type of dye and its chemical constitution, and also on selecting an appropriate dyeing process.
Secondary keywords:	flax;dyeing;vinylsulphone reactive dyes;bi-reactive dyes;hydrolysis;spectroscopy;colourimetry;
URN:	URN:SI:UM:
Type (COBISS):	Scientific work
Pages:	str. 173-186
Volume:	ǂLet. ǂ50
Issue:	ǂšt. ǂ7/9
Chronology:	2007
ID:	10861180