20.500.12556/DKUM-67876 Zeta potencial PA 6 Zeta potential of PA 6 V raziskavi smo preučevali elektrokinetične lastnosti poliamida 6 v obliki (a) folije in (b) tekstilnega filamenta ob uporabi dveh merilnih celic. Merili smo potencial zaradi pretoka in iz tega določili zeta potencial (▫$\zeta$▫ v odvisnosti od pH vrednosti medija. Meritve na posameznem materialu smo preučevali s stališča ponovljivosti. S tem namenom smo opravili meritve na 10 preskušancih istega vzorca. Določili smo osnovne statistične pokazatelje ponovljivosti za ▫$\zeta$▫ pri pH 3 in 9 ter izoelektrično tocko. Metodo smo optimirali glede na čas nabrekanja v raztopini elektrolita pred meritvijo in maso materiala v cilindrični celici. Meritve v 0,001 M KCl na obeh vrstah materiala kljub različni nadmolekulski in površinski strukturi dobro sovpadajo. Krivulje ▫$\zeta$▫=▫$\zeta$▫(pH) imajo pričakovan potek. PA 6 kaže amfoterno naravo zaradi vsebnosti amino in karboksilnih skupin. V alkalnem mediju disociirajo karboksilne skupine, kar povzroči negativen ▫$\zeta$▫ (folija: (-32,9▫$\pm$▫ 1,6) mV, filament: (-35,2▫$\pm$▫2,0) mV pri pH 9). V kislem mediju kaže PA kationski značaj zaradi disociacije amino skupin (folija: (24,5▫$\pm$▫1,7) mV, filament: (15,1▫$\pm$▫1,1) mV pri pH 3). Izoelektrična točka, kjer je ▫$\zeta$▫ enak 0, se nahaja za folijo pri pH vrednosti 4,7▫$\pm$▫0,1, za filament pa pri 4,9▫$\pm$▫ 0,1. This paper investigates electrokinetic properties of polyamide 6 in a form of (a) foil and (b) textile filament using two measurement cells. The streaming potential was measured and the zeta potential ▫$\zeta$▫ as a function of the pH value of medium was determined. The reproducibility of measurements was determined with 10 samples of each material. The basic statistics regarding ▫$\zeta$▫ at pH of 3 and 9 and isoelectric point (IEP) were determined. Furthermore, the wetting time in the electrolyte solution before the measurement and the mass of material in cylindrical cell were optimized. The measurements in 0.001 M KCl on both materials coincide with each other quite well in spite of different supermolecular and surface structure. The ▫$\zeta$▫-pH curves show the expected form. PA 6 is amphoteric due to presence of the amino and carboxyl groups. In the alkaline environment the carboxyl groups dissociate thus the ▫$\zeta$▫ is negative (foil: (-32.9▫$\pm$▫1.6)mV, filament: (-35.2▫$\pm$▫2.0) mV at pH of 9). In the acid environment PA 6 shows a cationic nature due to the dissociation of the amino groups (foil: (24.5▫$\pm$▫1.7) mV, filament: (15.1▫$\pm$▫1.1) mV at pH of 3). The isoelectric point, where f is equal to 0, was found for foil at pH value of (4.7▫$\pm$▫0.1) and for filament at (4.9▫$\pm$▫0.1), respectively. polimeri poliamid 6 elektrokinetične lastnosti potencial zaradi pretoka zeta potencial filament folija polymers polyamide elektrokinetic properties streaming potential zeta potential filament foil true false true Slovenski jezik Angleški jezik Znanstveno delo 2017-09-01 09:56:36 2017-09-01 09:57:27 2022-08-01 14:33:38 2019-07-11 16:34:07 2003 0 0 str. 342-347 št. 11/12 Letn. 46 2003 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 0351-3386 678.6:541.64:577.352:537.3.08 763396 8526870 0351-3386 URN:SI:UM:DK:JS3BPO6A Tekstilec_2003_Soster_et_al._Zeta_potencial_PA_6.pdf Tekstilec_2003_Soster_et_al._Zeta_potencial_PA_6.pdf 1 400E81DF665261191EE98536AD03984D 4d37ab9839c413b59d98011d2a183c5e77d7a23873e84ee460dba217780780a4 9ce50242-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/8c1ed528-7bc3-4dbb-a43c-376b4965d913 https://dk.um.si/Dokument.php?lang=slv&id=116738 http://www.tekstilec.si/wp-content/uploads/2003/11/Zeta-potencial-PA-6.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=116737 Fakulteta za strojništvo 0 0 0