Priprava nanokompozitne membrane

diplomsko delo

Adrijana Šegula (Author), Majda Sfiligoj-Smole (Mentor), Karin Stana-Kleinschek (Co-mentor)

Abstract

Nanokompozitna membrana je bila pripravljena z UV fotopolimerizacijo Nisopropilakrilamida v pore porozne, hidrofobne polipropilenske membrane. V hidrogelno matriko smo vgradili še organsko modificiran plasteni silikat Montmorilonit (Nanofil 8). Hidrofobni Nanofil 8 smo dispergirali v vodni disperziji s pomocjo površinsko aktivnega sredstva (PAS) Inutec SP1. Najbolj stabilno disperzijo smo dobili pri uporabi 1g/L PAS. Stabilnost disperzije smo dolocili z merjenjem posedanja delcev s turbidimetrom. Gele smo pripravili z razlicnimi koncentracijami zamreževalca in dolocili kot najprimernejšo koncentracijo zamreževalca med 0,3 in 0,5 g v 20 mL topila Kot najucinkovitejša predpriprava polipropilenske membrane se je izkazala eno urna obdelava v acetonu in prenos še mokre membrane v raztopino monomera. S polimerizacijo hidrogela z vgrajenimi delci Nanofil 8 so se spremenile površinske lastnosti polipropilenske membrane. Pore membrane so se napolnile z nanokompozitnim hidrogelom, porozna struktura membrane pa se je ohranila.

Keywords

materiali;nanokompoziti;nanokompozitne membrane;hidrogel;plasteni silikati;

Data

Language:	Slovenian
Year of publishing:	2009
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	[A. Šegula]
UDC:	620.3:66.081(043.2)
COBISS:	13740054
Views:	1809
Downloads:	134
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Preparation of nanocomposite membranes
Secondary abstract:	Nanocomposite membrane was prepared by UV photopolymerization of Nisopropylacrylamide on the surface of porous hydrophobic polypropylene membrane. Particles of organically modified layered silicates (Montmorilonite (Nanofil 8)) were incorporated into the hydrogel matrix. Aqueous dispersion of hydrophobic Nanofil 8 particles was achieved with addition of surfactant Inutec SP1; 1 g/L of surfactant proved to be the most appropriate concentration, which was determined by measurement of particles’ sedimentation rate. The most suitable concentration of crosslinker, needed for the formation of hydrogel, was determined by varying different amounts of crosslinker and by comparison of resultant hydrogels’ properties; optimal amount of crosslinker ranges between 0,3 and 0,5 g in 20 mL of solvent. Optimal procedure for formation of nanocomposite membrane consists of pretreatment of membrane in acetone and then subsequent impregnation of a wet membrane in the solution of monomer. After the UV polymerization of the hydrogel inside the pores of the polypropylene membrane, altered surface properties of the membrane were achieved. Pores were filled with nanocomposite hydrogel, however, a porous structure of the original membrane is preserved.
Secondary keywords:	nanocomposites;hydrogel;layerd silicates;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za strojništvo, Oblikovanje in tekstilni materiali
Pages:	VI, 25 f.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;materials testing;commercial materials;power stations;economics of energy;preiskava materiala;blagoznanstvo;energetske centrale;energetika;nanotechnology;nanotehnologija;applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;chemical technology;chemical and related industries;kemijska tehnologija;kemijske in sorodne industrije;physical and physicochemical operations and equipment;physical and physicochemical effects on chemical processes;fizikalne in fizikalno-kemijske operacije ter oprema;fizikalni in fizikalno-kemijski vplivi na kemijske procese;
ID:	987876