Preparation of Chitosan-Fe3O4 Nanoparticles by Ex-Situ Co-Precipitation Using Tripolyphosphate / Sulfate as Crosslinker and Characterization Using XRD

Ika Oktavia Wulandari (Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Brawijaya)
Akhmad Sabarudin (Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Brawijaya)
Djoko Herry Santjojo (Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Brawijaya)

Natural B
Vol 3, No 3 (2016)

Magnetic nanoparticles of Fe3O4 was synthesized in this research by using ex-situ copresipitation method followed by surface modification with crosslinked chitosan along with trypolyphospate (TPP) and sulfate crosslinking agents. The Fe3O4 materials were formed from FeCl2.H2O and FeCl3.6H2O with 1:2 ratio under alkaline condition. Surface modification processes were conducted by mixing chitosan solution with purified Fe3O4 yielding a ferrogel solution as a product. Here, the crosslinker agents, TPP and sulfate, were added to the mixture to make a crosslinking compounds. In these processes, the chitosan-Fe3O4 crystallite size were affected by composition ratio and crosslinking time which will be proven by using x-ray diffraction (XRD) and modified Debye-Scherrer methods. The results showed that, on highest ratios between chitosan and Fe3O4 as well as TPP/sulfate crosslinker, gave the smallest size of crystallite of chitosan-Fe3O4. Furthermore, the more time of crosslinking process caused crystallite size of chitosan-Fe3O4 became much smaller.