TY - GEN
T1 - Improved hardness of nanocomposite films on PMMA sheet using beadmilled-SiO2 nanoparticle in dowanol PM
AU - Lhosupasirirat, Siraprapa
AU - Jirathampradhab, Taksorn
AU - Niamsiri, Nuttawee
AU - Osotchan, Tanakorn
N1 - Publisher Copyright:
© 2018 Trans Tech Publications, Switzerland.
PY - 2018
Y1 - 2018
N2 - The main objective of this study was to prepare bead milled-silica nanoparticles (SiO2) as reinforcing materials for transparent hard coating films. SiO2 dispersed in Dowanol PM without any stabilizer was used as a main component in the nanocomposite hard coating films to improve hardness of Poly methyl methacrylate (PMMA) sheets. However, the major challenge in hard coating formulation is the dispersion of nanoscale SiO2 particles. Bead milling machine (MiniCer, NETZSCH, Germany) equipped with different sizes of zirconia (ZrO2) beads (0.1, 0.5, and 1.0 mm) was used for dispersing 40wt% SiO2 in Dowanol PM to achieve target sizes of 200, 500, and 800 nm. The dispersed nanoparticles were characterized by UV-visible spectroscopy for their optical transmission, transmission electron microscopy (TEM) for particle morphologies, and dynamic light scattering technique (DLS) for the particles sizes. The milled-SiO2 nanoparticles were stable in Dowanol PM as suspensions with their particles sizes closed to the target sizes. The 200-nm suspension showed the longest storage time without any aggregate formation. Whereas, the dispersed nanoparticles suspensions with the particles size >500 nm formed agglomerates during storage. The SiO2/MTMS nanocomposite coating film was then prepared coated milled-SiO2 suspension in Dowanol PM on PMMA sheets. The film with 200 nm SiO2 showed the highest transparency (92% at 550 nm) which was like the uncoated PMMA sheets. At thickness of 3-microns, SiO2/MTMS nanocomposite films could improve pencil hardness of PMMA sheets from
AB - The main objective of this study was to prepare bead milled-silica nanoparticles (SiO2) as reinforcing materials for transparent hard coating films. SiO2 dispersed in Dowanol PM without any stabilizer was used as a main component in the nanocomposite hard coating films to improve hardness of Poly methyl methacrylate (PMMA) sheets. However, the major challenge in hard coating formulation is the dispersion of nanoscale SiO2 particles. Bead milling machine (MiniCer, NETZSCH, Germany) equipped with different sizes of zirconia (ZrO2) beads (0.1, 0.5, and 1.0 mm) was used for dispersing 40wt% SiO2 in Dowanol PM to achieve target sizes of 200, 500, and 800 nm. The dispersed nanoparticles were characterized by UV-visible spectroscopy for their optical transmission, transmission electron microscopy (TEM) for particle morphologies, and dynamic light scattering technique (DLS) for the particles sizes. The milled-SiO2 nanoparticles were stable in Dowanol PM as suspensions with their particles sizes closed to the target sizes. The 200-nm suspension showed the longest storage time without any aggregate formation. Whereas, the dispersed nanoparticles suspensions with the particles size >500 nm formed agglomerates during storage. The SiO2/MTMS nanocomposite coating film was then prepared coated milled-SiO2 suspension in Dowanol PM on PMMA sheets. The film with 200 nm SiO2 showed the highest transparency (92% at 550 nm) which was like the uncoated PMMA sheets. At thickness of 3-microns, SiO2/MTMS nanocomposite films could improve pencil hardness of PMMA sheets from
KW - Bead milling
KW - Colloidal
KW - Nanocomposite
KW - Nanoparticles
KW - Sio nanoparticles
UR - https://www.scopus.com/pages/publications/85042520384
U2 - 10.4028/www.scientific.net/MSF.911.61
DO - 10.4028/www.scientific.net/MSF.911.61
M3 - Conference contribution
AN - SCOPUS:85042520384
SN - 9783035712032
T3 - Materials Science Forum
SP - 61
EP - 65
BT - Manufacturing Sciences and Technologies VIII - 8th ICMST 2017
A2 - Debnath, Sujan
PB - Trans Tech Publications Ltd
T2 - 8th International Conference on Manufacturing Science and Technology, ICMST 2017
Y2 - 23 June 2017 through 25 June 2017
ER -