Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Marmara Üniversitesi, Fen Bilimleri Enstitüsü, Kimya Mühendisliği (İngilizce) Anabilim Dalı, Türkiye
Tezin Onay Tarihi: 2020
Tezin Dili: İngilizce
Öğrenci: SİNEM ABALI
Danışman: Yaşar Andelib Aydın
Özet:
In this
thesis, LDPE-organosepiolite composite foams were synthesized as oil absorbent
materials. For this purpose, Eskişehir sepiolite was purified and acid treated
prior to organic modification using trimethoxy(octadecyl)silane,
(3-glycidyloxypropyl)trimethoxysilane and (3-aminopropyl)triethoxysilane under
varying reaction conditions. The synthesized sepiolite samples were subjected
to oil absorption tests and characterized with BET, TGA and FT-IR analysis. The
most oleophilic sepiolite was selected as filler for composite material
synthesize. LDPE-organosepiolite composite pellets containing 5%, 10 % and 20%
(w.) organosepiolite were produced by melt mixing using a twin screw extruder
and then formed into sheets. The sheets were foamed by batch foaming using CO2 as foaming
agent at saturation pressures of 45, 70 and 110 bar. The absorption capacites
of synthesized foams were determined for olive oil, waste olive oil, diesel and
gasoline. The reusability feature was also investigated. Foam morphologies were
analyzed with SEM. According to the results, acid-treated sepiolite was more
efficiently silylated than untreated sepiolite.
(3-glycidyloxypropyl)trimethoxysilane modified sepiolite was selected as the
filler for composite foams. The highest oil absorption capacity (3.38 g/g) and
volume expansion ratio (7.43) was obtained with the foam containing 10 % (w.)
organosepiolite saturated at 70 bar. Consequently, synthesized
LDPE-organosepiolite composite foams can remove oil from aqueous media
efficiently.