Biodegradable Oph-POSS/Poly(Lactic Acid) Nanocomposites: Morphology, Thermal Stability and Degradation Property

Abstract:

The purpose of this work was to produce nanocomposites of polylactic acid with oph-POSS (octaphenyl-Polyhedral Oligomeric Silsesquioxanes)-based biodegradable polyester and study morphology, thermal stability and degradation property. Oph-POSS was synthesized via limited-hydrolytic condensation of phenyl trimethoxysilane catalyzed by tetramethylammonium hydroxide. By adding different mass fractions of oph-POSS into the PLA matrix, oph-POSS/PLA nanocomposites were successfully prepared by the solution casting method using chloroform as solvent. SEM(scanning electron microscopy) observations indicated that oph-POSS were homogeneously dispersed in the PLA matrix. The biodegradation rate of oph-POSS/PLA composites was higher than that of neat PLA, moreover, the degradations of neat PLA and oph-POSS/PLA composites underwent the surface erosion mechanism. It was found that the existence of oph-POSS enhanced thermal stability slightly of nanocomposites relative to neat PLA; however, the thermal degradation mechanism of PLA remained unchanged.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 352-356
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.352
• Online since: July 2015
• Authors: Jie Sun, Qiang Qiang Zhao, Zheng Yan Cao, Hai Ning Lv, Cheng Qun Wang, Zai Sheng Cai
• Keywords: Biodegradation, Nanocomposites, Octaphenyl Polyhedral Oligomeric Silsesquioxanes, Polylactic Acid, Thermal Stability

References

[1] D. Garlota, A literature review of poly (lactic acid), J. Polym. Environ. 9(2001) 63-84.

[2] K. Petersen, P. Nielsen, M. Olsen, Physical and mechanical properties of biobased materials-starch, polylactate and polyhydroxybutyrate, Starch. 53(2001) 356-361.

DOI: 10.1002/1521-379x(200108)53:8<356::aid-star356>3.0.co;2-7

[3] G. Z. Li, L. C. Wang, H.L. Ni, et al. Polyhedral oligomeric silsesquioxane (POSS) polymers and copolymers: A review, J. Inorg. Organomet. P. 11(2001) 123-154.

[4] W.C. Zhang, X.M. Li, L.M. Li, et al. Study of the synergistic effect of silicon and phosphorus on the blowing-out effect of epoxy resin composites, Polym. Degrad. Stabil. 97(2012) 1041-1048.

DOI: 10.1016/j.polymdegradstab.2012.03.008

[5] L. Liu, Y. Hu, L. Song, et al, Preparation, Characterization and Properties of Polystyrene Composites Using Octaphenyl Polyhedral Oligomeric Silsesquioxane and Its Bromide Derivative, Iran. Polym. J. 19 (2010)937-948.

[6] S.K. Lim, E.P. Hong, J.C. Hyoung, et al, Polyhedral oligomeric silsesquioxane and polyethylene nanocomposites and their physical characteristics, J. Ind. Eng. Chem. 16(2010) 189-192.

[7] E. Sykacek, W. Schlager, N. Mundigier, Compatibility of softwood flour and commercial biopolymers in injection molding, Polym. Composite. 31(2010) 443-451.

DOI: 10.1002/pc.20823