20.500.12556/RUL-119076 Reakcije laktonov s silanskimi derivati Reactions of lactones with silane derivates Laktoni so ciklični estri, ki se lahko ob odprtju obroča s hidrolizo polimerizirajo v polihidroksialkanoate. Tako prvi kot drugi imajo različne pomembne lastnosti in uporabnosti (npr. biorazgradljiva plastika, uporabnost v biomedicini, topila … ). Takšne molekule so lahko uporabne nemodificirane, lahko pa na njih izvedemo vrsto različnih modifikacij, ki polihidroksialkanoatom spremenijo fizikalno-kemijske lastnosti in s tem tudi njihovo uporabnost. V diplomskem delu sem se najprej posvetila možnim modifikacijam teh polimerov, nato pa sem v naslednjem poglavju opisala še dejanske reakcije laktonov s silanskimi derivati. Te reakcije so pomembne predvsem v smislu vgradnje polihidroksialkankanoatne verige v silanske prevleke, ki dobijo z nase vezanim laktonom tudi njegove lastnosti. Ker je to področje še precej neraziskano in za te reakcije ni veliko podatkov, sem se lotila še eksperimentalnega dela. V eksperimentalnem delu sem raziskala reakcijo med laktonom (γ-valerolaktona in ε-kaprolaktona) in 3-aminopropiltrimetoksi silanom v različnih topilih in ugotovila, da je alkohol (v našem primeru etanol) nabolj primerno topilo za takšne reakcije. Lactones are cyclic esters that form polyhydroxyalkanoates when the ring is opened by hydrolysis. Both the former and the latter have different important properties and uses (e.g. biodegradable plastics, applicability in biomedicine…). Such molecules can be useful unmodified, but they can be subjected to a number of different modifications that change the physicochemical properties of polyhydroxyalkanoates and thus their usefulness. In my dissertation, I first focused on possible modifications of these polymers, and then in the next section I described the actual reactions of lactones with silane derivatives. These reactions are particularly important in terms of the various silane coatings that also have the properties of the lactone bound to it, whether the lactone is modified or not. Since this area is still quite unexplored and there is not much data for these reactions, I also did some experimental work. In the experimental work, I performed different reactions of two different lactones (γ-valerolactone and ε-caprolactone) with 3-aminopropyltrimethoxy silane in different solvents and found that the only suitable solvent for such reactions was alcohol (in our case ethanol). polihidroksialkanoati laktoni silani hidroliza estri polyhydroxyalkanoates lactones silane hydrolysis esters true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2020-09-02 12:00:01 2020-09-02 12:00:05 2022-08-31 03:51:15 0000-00-00 00:00:00 2020 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 9541 27579651 Sulc_Neza_-_Reakcije_laktonov_s_silanskimi_derivati.pdf Sulc_Neza_-_Reakcije_laktonov_s_silanskimi_derivati.pdf 1 B17E0A43DF45E434B9A23867F0D14740 d21b347d887333f16e1d8e8acb1a42372d3c0edff78144dd57e9420426cb5c32 b9ff8835-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=133731 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0