Naslov
Study of thermal stability of (3-aminopropyl)trimethoxy silane-grafted titanate nanotubes for application as nanofillers in polymers

Autori
Plodinec, Milivoj ; Gajović, Andreja ; Iveković, Damir ; Tomašić, Nenad ; Zimmerman, Boris ; Macan, Jelena ; Haramina, Tatjana ; Su, DangSeng ; Willinger, Marc

Izvornik
Nanotechnology (0957-4484) 25 (2014), 43; 435601, 13

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
titanate nanotubes surface modified by (3-aminopropyl)trimethoxy silane ; thermal stability ; epoxy-based nanocomposites

Sažetak
Protonated titanate nanotubes (TiNT-H) were surface-modified with (3-aminopropyl)trimethoxy silane (APTMS) by novel method suitable for syntheses of large amounts of materials with low costs. Usage of prepared nanotubes for polymer reinforcement was studied. Since the thermal stability of nanofiller was important to preserve their functional properties, stability was studied by in situ high temperature measurements. The most temperature stable sample, 20 min silanized nanotubes, were used for preparation of epoxy- based nanocomposites. This nanofiller form smaller (few hundreds of nm) and larger (few μm) aggregates in polymer, where the amount of aggregates increase with addition of nanofillers. All the APTMS modified titanate nanotubes in agregates were bond well with the epoxy matrix since amine groups on the TiNTs surface can react with epoxy group to form covalent bonds between the matrix and the nanofiller. Very small addition (0.19 – 1.52 wt%) of nanotubes significantly increased the glass transition temperature and the modulus in rubbery state of the epoxy based polymer. A smaller amount of added nanofiller provide larger increase in these parameters and therefore better dynamic mechanical properties due to the smaller amount of large aggregates. In this work APTMS modified tianate nanotubes were proved as promising nanofiller in epoxy based nanocomposits.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija, Kemijsko inženjerstvo

POVEZANOST RADA