Vpliv vsebnosti modakrila v bombažnih vzorcih na potencial zeta

diplomska naloga

Leja Ločniškar (Avtor), Aljana Petek (Mentor), Irena Petrinić (Komentor)

Povzetek

Potencial zeta je eksperimentalno določljiva veličina in je rezultat delovanja elektrokinetičnih pojavov. Nanaša se na spremembo potenciala na strižni površini med premikajočim in mirujočim delom difuzne dvojne plasti. Namen diplomske naloge je bil ugotoviti kako gostota zloženosti prej v cilindrični celici vpliva na potencial zeta in kakšen vpliv ima nanj širina reže pretočnega kanala v celici z nastavljivo režo. Ugotavljali smo tudi ali so rezultati potenciala zeta prej in pletenin med seboj primerljivi. V naši raziskavi smo potencial zeta določali z elektrokinetičnim analizatorjem SurPASS, ki temelji na merjenju pretočnega toka in pretočnega potenciala. Z uporabo tega instrumenta je mogoče dobiti tudi informacijo o realnem potencialu zeta, in ne le o navideznem. Rezultati merjenj v cilindrični celici so pokazali, da z naraščajočo gostoto zloženosti postaja potencial zeta vse manj negativen. Rezultati merjenj v celici z nastavljivo režo pa so pokazali, da širina reže pretočnega kanala, z izjemo 100% modakrila, ne vpliva na potencial zeta. S primerjavo rezultatov potenciala zeta prej in pletenin smo ugotovili, da celici dajeta primerljive rezultate navideznega potenciala zeta. Ugotovili smo tudi, da realni in navidezni potencial zeta nista primerljiva zaradi velikih razlik v absolutnih vrednostih. Za informacijo o realnem potencialu zeta bo raziskavo potrebno nadaljevati z merjenjem v modificirani celici z nastavljivo režo. Rezultati merjenj v cilindrični celic in celici z nastavljivo režo so potrdili pričakovan trend vzorcev glede na vsebnost bombaža in modakrila, in sicer da s povečano vsebnostjo modakrila potencial zeta postaja vse bolj negativen.

Ključne besede

potencial zeta;pretočni potencial;modakril;cilindrična celica;gostota zloženosti;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2011
Izvor:	Maribor
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Založnik:	[L. Ločniškar]
UDK:	677.2.017:544.638(043.2)
COBISS:	15492630
Št. ogledov:	1983
Št. prenosov:	130
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	ǂThe ǂinfluence of modacryl in cotton samples on zeta potential
Sekundarni povzetek:	The zeta potential is an experimentally determinable parameter and is the result of electrokinetic phenomena. It refers to the potential change on shear surface between the moving part and the static part of the diffuse double layer. The aim of the thesis was to determine the effect of packing density of yarn in a cylindrical cell on zeta potential and what impact it has the width of slit in the streaming channel in an adjustable gap cell on zeta potential. We also wanted to determine whether or not the results of zeta potential measurements of yarn and knitted fabrics are comparable. In our study, zeta potential was determined with using a »SurPASS« electrokinetic analyzer based on the streaming current and streaming potential measurement. By using this instrument is it also possible to get informations about the correct zeta potential, and not just for the apperent zeta potential. The results of measurements in the cylindrical cell have shown that the higher the packing density, the less negative the zeta potential. The results of measurements in the adjustable gap cell have demonstrated that the width of the slit in the streaming channel, with the exception of 100% modacrylic, does not affect the zeta potential. When comparing the zeta potential results of yarn and knitwear, it was determined that the results of apparent zeta potential are comparable between both cells. It was also determined that the apparent and correct zeta potential are not comparable due to large differences in absolute values. In order to obtain accurate information on the correct zeta potential, all further measurements shall be performed in a modified adjustable gap cell. The results of measurements in the cylindric and adjustable gap cell confirmed the expected trend of samples, namely depending on the content of cotton and modacrylic – the higher the content of modacrylic, the more negative the zeta potential.
Sekundarne ključne besede:	zeta potential;streaming potential;modacrylic;cylindrical cell;packing density;
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Strani:	78 f.
Ključne besede (UDK):	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;mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;physical chemistry;fizikalna kemija;electrochemistry;
ID:	8762056