Fabrication of triacetylcellulose-SiO2 nanocomposites by surface modification of silica nanoparticles.
We have successfully fabricated triacetylcellulose (TAC) polymer-silica nanocomposite films having up to 40 wt % of incorporated silica nanoparticles by deliberately designing a surface ligand that has a structure similar to that of polymer repeating units and effectively modifying the surface of silica nanoparticles through chemical bonding. Cross-sectional TEM analysis reveals no significant aggregation in all TAC-silica nanocomposite films. Thermal analysis results suggested that TAC-silica nanocomposites had higher T(g) and T(c) values as compared to pure TAC, and the increase in T(g) and T(c) was affected by the silica content. The transparency of all the nanocomposite films was over 80% in the visible range, confirming the excellent compatibility of nanoparticles with TAC. In this study, we enhance the interaction between nanoparticles and polymer matrices by modifying the surface of nanoparticles with a ligand that has a structure similar to that of polymer repeating units. It is expected that this method can be applied to other polymer systems to develop useful nanocomposites.
Department of Chemistry, Seoul National University, Seoul 151-747, Korea.
Young-Jae
YJ
Kim
Shin-Woo
SW
Ha
Seung-Min
SM
Jeon
Dong Woo
DW
Yoo
Sung-Ho
SH
Chun
Byeong-Hyeok
BH
Sohn
Jin-Kyu
JK
Lee
D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D008567:Membranes, Artificial; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
D008567:Membranes, Artificial; D012822:Silicon Dioxide; D002482:Cellulose; C024671:cellulose triacetate