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Enhanced properties of poly(lactic acid) with silica nanoparticles
Author(s) -
Lv Hanxiao,
Song Shixin,
Sun Shulin,
Ren Liang,
Zhang Huixuan
Publication year - 2016
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3777
Subject(s) - materials science , thermogravimetric analysis , differential scanning calorimetry , scanning electron microscope , fourier transform infrared spectroscopy , thermal stability , nanoparticle , grafting , chemical engineering , surface modification , crystallization , lactic acid , composite material , polymer , nanotechnology , physics , genetics , biology , bacteria , engineering , thermodynamics
The objective of this article is to fabricate poly(lactic acid) (PLA) and nano silica (SiO 2 ) composites and investigate effect of SiO 2 on the properties of PLA composites. Surface‐grafting modification was used in this study by grafting 3‐Glycidoxypropyltrimethoxysilane (KH‐560) onto the surface of silica nanoparticles. The surface‐grafting reaction was confirmed by Fourier transform infrared spectroscopy and thermogravimetric analysis. Then the hydrophilic silica nanoparticles became hydrophobic and dispersed homogeneously in PLA matrix. Scanning electron microscope and Dynamic thermomechanical analysis (DMA) results revealed that the compatibility between PLA and SiO 2 was improved. Differential scanning calorimetry and polarized optical microscope tests showed that nano‐silica had a good effect on crystallization of PLA. The transparency analysis showed an increase in transparency of PLA, which had great benefit for the application of PLA. The thermal stability, fire resistance, and mechanical properties were also enhanced because of the addition of nano silica particles. Copyright © 2016 John Wiley & Sons, Ltd.