Investigation of Mechanical and Thermal Properties of Modified Silica Aerogels/Epoxy/Aramid Composites
Makaleler > Tam Makale · 2025
Yazarlar: Hasan Yavuz ÜNAL, Selay SERT ÇOK, FATOŞ KOÇ, Nilay GİZLİ, Yeliz PEKBEY
POLYMER COMPOSITES, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2025, cilt 46, ss 15313-15330
DOI: 10.1002/pc.30131
Özet
<p>Due to its high pore size and low density, amine-modified silica aerogel (XSA) is an excellent candidate for the secondary re-inforcement material of polymer matrix composites. In this study, the mechanical, thermal, and morphological properties ofamine-modified silica aerogel-reinforced aramid/epoxy composite (EAFS) produced by the hand lay-up method were investi-gated. According to the resin weight, 1 wt.% (EAFS-1), 2 wt.% (EAFS-2), and 3 wt.% (EAFS-3) XSA reinforcements were dispersedinto the epoxy resin by ultrasonic mixer. Tensile, three-point bending, compression, and shear tests were performed to determinethe mechanical properties, while thermal properties were determined by dynamic mechanical analysis and thermogravimetricanalysis. The mechanical properties demonstrated an upward trend up to EAFS-2, after which a decline was observed at EAFS-3. Tensile strength, modulus of elasticity, flexural strength, flexural modulus, and compressive strength of EAFS-2 increased by20.43%, 30.91%, 10.09%, 24.01%, and 3.62%, respectively, compared to EAFS- 0. Furthermore, the incorporation of XSA reinforce-ment resulted in a delay in the onset and endset of the degradation temperature.</p>