Počet záznamů: 1
Influence of sol-gel conditions on the final structure of silica-based precursors
- 1.
SYSNO ASEP 0446152 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Influence of sol-gel conditions on the final structure of silica-based precursors Tvůrce(i) Perchacz, Magdalena (UMCH-V) RID
Beneš, Hynek (UMCH-V) RID, ORCID
Kobera, Libor (UMCH-V) RID, ORCID
Walterová, Zuzana (UMCH-V)Zdroj.dok. Journal of Sol-Gel Science and Technology. - : Springer - ISSN 0928-0707
Roč. 75, č. 3 (2015), s. 649-663Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova sol–gel ; (3-glycidyloxypropyl) trimethoxysilane ; alkoxysilane Vědní obor RIV CA - Anorganická chemie CEP GA14-05146S GA ČR - Grantová agentura ČR Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000359360500017 EID SCOPUS 84937515069 DOI 10.1007/s10971-015-3735-z Anotace This work studied the solvent-free sol–gel process of (3-glycidyloxypropyl)trimethoxysilane using three different experimental setups and a ternary amine (DABCO) or a tin-based compound (DBTL) as the sol–gel catalysts, which allowed to prepare homogeneous liquid products and control their final microstructures. The aim was to synthesize epoxy-functionalized precursors for hybrid MALDI-TOF, DLS, FTIR and SEC were used to characterize the obtained sols and xerogels. The formed silica structures were primarily dependent on the type of catalyst used, but small cyclic structures were always present. Nevertheless, the DABCO-catalyzed system showed a higher tendency to create cage-like structures in contrast to the system that used DBTL catalyst in which larger ladderlike structures prevailed. The sols as well as the final xerogels with the higher condensation degree of alkoxysilane bonds were prepared under the basic (DABCO) conditions. All prepared liquid products (sols) were well miscible with epoxy pre-polymers and therefore can be considered as suitable epoxy-functionalized precursors for preparation of hybrid materials based on epoxy matrix. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2016
Počet záznamů: 1