TY - JOUR
T1 - Particle surface treatment for nanocomposites containing ceramic particles
AU - McMorrow, Brian
AU - Chartoff, Richard
AU - Lucas, Pierre
AU - Richardson, Wade
AU - Anderson, Phil
N1 - Funding Information:
This research was supported by the U.S. National Science Foundation under Grant No. DMI-0341924, Division of Design Manufacturing and Industrial Innovation; Dr. George Hazelrigg was program administrator. The authors are grateful to NSF for its support.
PY - 2006
Y1 - 2006
N2 - Polymer matrix composites containing dispersed ceramic nanoparticles were formed by UV activated photopolymerization from the reactive liquid monomer hexanediol-diacrylate (HDODA). The polymer forming reaction proceeds by a free-radical mechanism. In forming polymer composites that contain nanoparticles, dispersing the particles as discrete entities is critical for developing optimum properties. In the as-received condition, ceramic particles are aggregated. They must be dispersed in the monomer but if the particles are not surface treated and stabilized, they rapidly settle out of the suspension. Surface modification of the ceramic allows the particles to be suspended in the organic monomer and stabilizes the dispersion so that the particles will not reagglomerate. In this study silanes were employed as surface modifiers to disperse two nano-particulate ceramics in the HDODA monomer. The ceramic particles used are silicon carbide (SiC) and barium titanate (BaTiO3). The shapes and sizes of the ceramic particles were established using transmission electron microscopy (TEM). A method for dispersing nanoparticles was developed in which silane-treated particles were stabilized so that they did not settle out of the liquid monomer. An analytical method based on atomic force microscopy (AFM) was used to characterize the particle distribution in the cured composites. Focusing on work with SiC nanoparticles in HDODA as a model system, the process for silane application was advanced so that it successfully yielded composites having no aggregates with particle sizes closely matching those of the neat ceramic particles.
AB - Polymer matrix composites containing dispersed ceramic nanoparticles were formed by UV activated photopolymerization from the reactive liquid monomer hexanediol-diacrylate (HDODA). The polymer forming reaction proceeds by a free-radical mechanism. In forming polymer composites that contain nanoparticles, dispersing the particles as discrete entities is critical for developing optimum properties. In the as-received condition, ceramic particles are aggregated. They must be dispersed in the monomer but if the particles are not surface treated and stabilized, they rapidly settle out of the suspension. Surface modification of the ceramic allows the particles to be suspended in the organic monomer and stabilizes the dispersion so that the particles will not reagglomerate. In this study silanes were employed as surface modifiers to disperse two nano-particulate ceramics in the HDODA monomer. The ceramic particles used are silicon carbide (SiC) and barium titanate (BaTiO3). The shapes and sizes of the ceramic particles were established using transmission electron microscopy (TEM). A method for dispersing nanoparticles was developed in which silane-treated particles were stabilized so that they did not settle out of the liquid monomer. An analytical method based on atomic force microscopy (AFM) was used to characterize the particle distribution in the cured composites. Focusing on work with SiC nanoparticles in HDODA as a model system, the process for silane application was advanced so that it successfully yielded composites having no aggregates with particle sizes closely matching those of the neat ceramic particles.
KW - INKS CONTAINING NANOPARTICLES
KW - NANOPARTICLE SURFACE MODIFICATION
KW - POLYMER MATRIX NANOCOMPOSITES
KW - SILANE TREATMENT OF NANOPARTICLES
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U2 - 10.1163/156855406779366778
DO - 10.1163/156855406779366778
M3 - Article
AN - SCOPUS:33846227922
SN - 0927-6440
VL - 13
SP - 801
EP - 817
JO - Composite Interfaces
JF - Composite Interfaces
IS - 8-9
ER -