Surface Modified CaCO₃ Nanoparticles with Silica via Sol-Gel Process Using in Poly(lactic acid) Nanocomposite

Abstract:

The goal of this work is to modify surface of calcium carbonate nanoparticles with silica (CaCO3@SiO2) via sol-gel process, and to investigate the influence of CaCO3@SiO2 on mechanical properties and fracture behavior of poly(lactic acid) nanocomposite. Modified CaCO3@SiO2 nanoparticles were prepared with different Si/Ca ratios. It is found that the Si:Ca wt% ratio was increased with respect to the Si:Ca mole ratio used in the reaction. Incorporating CaCO3@SiO2 of 5 wt% increased elastic modulus, %elongation at break and notched impact strength of PLA nanocomposites, which these properties of CaCO3@SiO2-PLA nanocomposite was increased with respect to increasing of SiO2 content on the surface of CaCO3 nano-particles. This implies that better compatibility between polymer matrix and filler was achieved after modification surface of CaCO3 with SiO2 layers.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 520-524
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.520
• Online since: March 2012
• Authors: Bawornkit Nekhamanurak, Pajaera Patanathabutr, Nattakarn Hongsriphan
• Keywords: Calcium Carbonate Nanoparticle, Nanocomposite, Poly(lactic acid) (PLA), Silica, Sol-Gel (SG)

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