Določanje in statistično ovrednotenje zeta potenciala bombažnih tkanin z uporabo cilindrične celice

diplomska naloga univerzitetnega študijskega programa

Simona Cep (Author), Darinka Brodnjak-Vončina (Mentor), Aljana Petek (Co-mentor), Irena Petrinić (Co-mentor)

Abstract

Elektrokinetične lastnosti opišejo električni potencial v bližini trdne površine, ki se premika v tekoči fazi. Opisan je z zeta potencialom. Avstrijsko podjetje Anton Paar GmbH iz Graza je razvilo elektrokinetični analizator SurPASS, ki temelji na principu merjenja pretočnega potenciala in pretočnega toka za določanje zeta potenciala. Namen naloge je bil, da z zeta potencialom merjenim na podlagi pretočnega potenciala določamo kakovost vzorčenih surovih bombažnih tkanin pridobljenih iz vzhodnih držav (Kitajska, Indija,…). Kakovost le-teh ima močan vpliv na kakovost končnega produkta. Nizka kakovost zahteva ponovitve procesnih obdelav pri končnih izdelkih ter dodatno zvišuje stroške produktov. Nato smo še določili zeta potencial bombažnih, surovih in obdelanih vlaknin (čiščenje, kislinska in alkalna obdelava, beljenje) z namenom vzpostavitve korelacije med surovimi in obdelanimi bombažnimi tkaninami. Rezultati meritev pretočnega potenciala jasno kažejo na razlike površinskih lastnosti surovih in obdelanih bombažnih vlaknin kjer ima alkalijsko obdelan bombaž največjo dostopnost disociiranih hidroksilnih in karboksilnih skupin na površini, kar vidimo v porastu negativnega zeta potenciala.

Keywords

bombažne tkanine;zeta potencial;pretočni potencial;površinske lastnosti;statistično ovrednotenje;

Data

Language:	Slovenian
Year of publishing:	2009
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[S. Cep]
UDC:	677.1.017:544.638(043.2)
COBISS:	13183510
Views:	2902
Downloads:	204
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Zeta potential determination and statistical evaluation of cotton fabrics using a cylindrical cell
Secondary abstract:	Elektrokinetic properties describe the electrical potential adjacent to a solid surface, if it is moving in the surrounding liquid phase. It is described by zeta potential. Austrian company Anton Paar GmbH from Graz has developed the SurPASS elektrokinetic analyzer, which is based on a streaming potential/streaming current for determining the zeta potential. Zeta potential measurements using this streaming potential method were performed regarding the quality of the supplied raw cotton fibres from east countries (China, India,… ). The quality of the raw cotton fibres has a strong influence on the final product. Low- quality cotton requires the repetition of different process steps, which increases production costs. We determined the zeta potential of cotton-knitted fabrics, both raw and modified (de-waxed, acid and alkali treated and pre-bleached), in order to establish any correlation between the raw and treated cotton knitted fabrics. The streaming potential measurements clearly showed the differences in the surface properties between the raw and modified cottons. The alkali pre- treatment caused a pronounced decrease in zeta potential, and an improvement in the accessibility of dissociable groups of cotton knitted fabrics.
Secondary keywords:	cotton knitted fabrics;zeta potential;streaming potential;surface properties;statistical evaluation;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	XI, 75 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;bast fibres (fibres from dicotyledon stems);hard fibres (fibres from monocotyledon leaves and fruit);vlakna iz ličja;stebelna vlakna dvokaličnic;trda listna in plodovna vlakna enokaličnic;mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;physical chemistry;fizikalna kemija;electrochemistry;
ID:	985744