Polimerne strukture s spremenljivo porazdelitvijo por

diplomsko delo univerzitetnega študijskega programa I. stopnje

Nika Marija Murenc (Author), Peter Krajnc (Mentor), Stanko Kramer (Co-mentor)

Abstract

V diplomski nalogi smo želeli pripraviti material s stopenjsko velikostjo por, zato smo si najprej pripravili vzorce, kjer smo kot monomer uporabili trimetilolpropan triakrilat(TMPTA), mu dodali toluen, surfaktant Hypermer B246 (HB246) in fotoiniciator Irgacure 819 (I819). Tej organski fazi smo med mešanjem po kapljicah dodali 80 vol. % vodne faze. Ker nas je zanimala sprememba v velikosti por, smo pripravili vzorce, pri katerih smo dodajali različne deleže topila DMSO in THF (od 1% do 32%). Poleg dodajanja različnih deležev topil, pa smo pripravili tudi vzorce, ki smo jih mešali pri različnih hitrostih. Določili smo velikosti por, ki so se nahajale v območju do 60 µm, ter opazovali porazdelitve v tem območju glede na posamezni vzorec. Z elementno analizo smo dokazali, da se sestava pri posameznih vzorcih ni spremenila. S pomočjo navedenih določitev smo pripravili tri vzorce, ki so imeli dovolj veliko razliko v velikosti por, in s kombiniranjem teh pripravili materiale s stopenjsko poroznostjo. Zaradi dovolj velike viskoznosti HIP emulzij, smo vzorce preprosto prelili enega na drugega, ne da bi pri tem prišlo do mešanja emulzij, kar je omogočilo pripravo vzorcev s spremenljivo porazdelitvijo por.

Keywords

HIP emulzije;poliHIPE materiali;poroznost;porozni materiali;gradientni materiali;porozni gradientni materiali;diplomske naloge;

Data

Language:	Slovenian
Year of publishing:	2022
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[N. M. Murenc]
UDC:	544.773.3.022.537(043.2)
COBISS:	121402115
Views:	14
Downloads:	3
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Polymer structures with variable pore size distributions
Secondary abstract:	The objective of the thesis was to prepare a material with a graded pore size. Firstly, an organic phase, consisting of trimethylolpropane triacrylate (TMPTA), toluene, the surfactant Hypermer B246 and the photoinitiator Irgacure 819 was prepared. While the organic phase was mixing an aqueous phase consisting of calcium chloride was added drop wise to the organic phase. To prepare materials with different pore sizes different solvents, namely DMSO and THF, were used at various concentrations ranging from 1% to 32%. In addition to the change in solvent and concentration thereof, the stirring speed was also varied from 200 rpm to 600 rpm. To ensure that the elemental composition of the prepares samples had not changed with the addition of different solvents, elemental analysis was conducted. Lastly, materials with a graded pore size were prepared from the most suitable samples. The graded pore size samples were prepared by pouring the HIPEs one over another which was feasible due to the high viscosity.
Secondary keywords:	HIP emulsions;polyHIPE materials;porosity;gradient materials;porous gradient materials;
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	1 spletni vir (1 datoteka PDF (VIII, 28 f.))
ID:	16322719