20.500.12556/DKUM-27249 UV polymerization of poly (N-isopropylacrylamide) hydrogel UV polimerizacija poli(N-isopropilakrilamidnega) hidrogela This contribution is focused on the determination of polymerization and crosslinking mechanism of poly (N-isopropyl- acralymide) hydrogel and its swelling properties. Hydrogels were synthesized by environmental friendly UV polymerization method, from monomer N-isopropylacrylamide (NIPAM) and crosslinker N,N´-methylenebisacrylamide (BIS) of different concentrations. UV polymerization was performed in an UV chamber using UVA light with the wave length 350 nm. Surface morphology and pore structure analysis was carried out using SEM microscopy. The polymerization and crosslinking mechanism was determined by Fourier Transform Infrared spectroscopy (FT-IR). It was confirmed that crosslinker concentration influences the hydrogel structure and swelling properties. By increasing the crosllinker concentration the hydrogel structure changes from homogen to heterogen and the equilibrium degree of swelling decreases. V prispevku je predstavljen mehanizem polimerizacije in zamreženja poli(N-isopropilakrilamidnega) hidrogela in njegova sposobnost nabrekanja. Hidrogele smo sintetizirali z okolju prijazno metodo UV polimerizacije iz monomera N-isopropilakrilamida (NIPAM) in zamreževalca N,N´-metilenebisakrilamida (BIS) različnih koncentracij. UV polimerizacija je potekala v UV komori z UVA svetlobo valovne dolžine 350 nm. Površinsko morfologijo in strukturo por smo spremljali s SEM mikroskopijo. Mehanizem polimerizacije in zamreženja smo določili na podlagi posnetih spektrov s Fourier Transform Infrardečo spektroskopijo (FT-IR). Ugotovili smo, da koncentracija zamreževalca vpliva na strukturo hidrogela in njegovo sposobnost nabrekanja. Z večanjem koncentracije zamreževalca pride do spremembe v strukturi hidrogela iz homogene v heterogeno, kar vpliva na zmanjšanje sposobnosti nabrekanja. poly (N-isopropylacrylamide) hydrogel UV polymerization FTIR polymerization mechanism swelling properties SEM poli(N-isopropilakrilamide) hidrogel hidrogel DTIR mehanizem polimerizacije nabrekanje SEM true false true Angleški jezik Slovenski jezik Znanstveno delo 2012-06-01 10:11:44 2012-06-01 10:11:44 2022-04-15 13:39:48 2021-04-11 03:23:30 2012 0 0 str. 87-91 št. 1 Letn. 46 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1580-2949 678.7 106193664 15776022 1580-2949 URN:SI:UM:DK:7YMF0IJH Materiali_in_tehnologije_2012_Kurecic,_Sfiligoj-smole,_Stana-kleinschek_Uv_Polymerization_of_Poly_(_N-Isopropylacrylamide_)_Hydrogel.pdf Materiali_in_tehnologije_2012_Kurecic,_Sfiligoj-smole,_Stana-kleinschek_Uv_Polymerization_of_Poly_(_N-Isopropylacrylamide_)_Hydrogel.pdf 1 81BDABD61C458889AAC64FB3C58CA4F0 0c6c5086a9a35b00460e2f1d930dc5286286d3de7a9b81fceceb0df926cee25f 04ef3aba-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/33f6f7ac-cf32-4412-92a8-4bc3b1139f92 https://dk.um.si/Dokument.php?lang=slv&id=110153 http://mit.imt.si/Revija/izvodi/mit121/kurecic.htm 1 https://dk.um.si/Dokument.php?lang=slv&id=36506 Fakulteta za strojništvo 0 0 0