Synthesis and Characterization of Silica and Carbon Aerogels from Hemp Fiber via freeze-drying Process


ÇITAK A.

Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, cilt.20, sa.6, ss.1079-1084, 2020 (Diğer Kurumların Hakemli Dergileri)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 20 Konu: 6
  • Basım Tarihi: 2020
  • Doi Numarası: 10.35414/akufemubid.789007
  • Dergi Adı: Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi
  • Sayfa Sayıları: ss.1079-1084

Özet

In this study, it was aimed to synthesize and characterize cellulose based silica carbon aerogel by solgel method. Pooled and hand-peeled hemp fibers were used as the source of cellulose at the time of October-2018 harvest in Vezir Köprü, Samsun province. Hemp fiber containing crude cellulose was mechanically made into cellulose pulp. Then, Silica aerogel (SA) sample was synthesized by Sol-gel method and subsequent freeze-drying process. Finally, the synthesized SA sample was kept in a tube oven at a heating rate of 5 oC/min under a nitrogen flow of 120 ml/min for 2 hours at 500 oC to obtain cellulose-based carbon aerogel (SCA). Synthesized samples; Scanning Electron Microscopy (SEM), Energy dispersive spectrometer (EDS), Surface analysis measurement (BET), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction method (XRD) and electrical conductivity analyzes were performed. As a result of electrical conductivity analysis, the electrical resistances of the silica aerojels was found to be very high. It was interpreted that the synthesized samples could be used as an insulator.