Preparation and Mechanical Property of PLLA/Nano-SiO2 Composite
Blends of Poly(L-lactide) (PLLA) and nano-SiO2 powder were prepared via solution mixing. Effect of nano-SiO2 particles on the crystallinity of PLLA in composite was investigated by X-ray diffraction, the result indicated that the incorporation of nano-SiO2 did not influence the crystallinity of PLLA in composite. The bending strength and modulus of the PLLA/nano-SiO2 composites with varying nano-SiO2 content were tested, showing that the bending strength reduced with the increase of nano-SiO2 content and the bending modulus increased. The SEM graphs of PLLA/nano-SiO2 composites were illustrated that the cross-section of composites varied from brittle to ductile fracture with the content of nano-SiO2 increasing up to 10 %, and changed from ductile to brittle fracture with further increasing of nano-SiO2 content.
Wenzhe Chen, Qiang Li, Yonglu Chen, Pinqiang Dai and Zhengyi Jiang
X. Fan, "Preparation and Mechanical Property of PLLA/Nano-SiO2 Composite", Advanced Materials Research, Vols. 476-478, pp. 367-370, 2012