• Title
    [Domestic Journal] Synthesis of Cellulose-L-tyrosine-SiO2/ZrO2 Hybrid Nanocomposites by Sol-Gel Process and Its Potential
  • Journal
    International Journal of Precision Engineering and Manufacturing
  • Authors
    Sivalingam Ramesh, Heung Soo Kim*,Young-Jun Lee, Gwang-Wook Hong, Dongsoo Jung and Joo-Hyung Kim*
  • Date
    September, 2017
  • Citation Index
    SCI
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  • 글주소
  • 02-20
99089CE58A3A32F2CF5C85974F5707CE_1.jpg

Keywords: Cellulose, Metal oxides, Sol-gel process, Chemical bonding, L-tyrosine, Nanocomposites 

Abstract​ 

Cellulose is an excellent natural biopolymer that can be modified to organic-inorganic hybrid nanocomposites by connecting
nanomaterials to hydroxyl structure to improve the thermal, morphological, optical and biological properties. Based on the unique
properties of oxide materials, we selected SiO2 and ZrO2, which has a large bandgap and a high dielectric constant. To modify the
cellulose structure, we used an in-situ sol-gel process to form a cellulose-L-tyrosine (CE-L-tyr) and further synthesized hybrid
cellulose-L-tyrosine-SiO2/ZrO2 nanocomposite materials by γ-aminopropyl triethoxysilane (γ-APTES) as coupling agent in the
presence of tetraethoxysilane (TEOS) and zirconium isopropoxide. The cellulose-L-tyrosine-SiO2/ZrO2 hybrid nanocomposites were
characterized by FTIR, XPS, XRD, UV, TGA, DSC, SEM, EDX and TEM measurements. The different analysis results show the optical
transparency, thermal stability, and control morphology of hybrid nanocomposites. From antimicrobial test, CE-L-tyr-SiO2/ZrO2 hybrid
nanocomposites exhibit stronger activity against Bacillus cereus and E. coli than that Lactobacillus and Pseudomonas aeruginosa.