Preparation, dynamic rheological behavior, crystallization, and mechanical properties of inorganic whiskers reinforced polylactic acid/hydroxyapatite nanocomposites

Abstract

The novel inorganic SiO 2 -MgO-CaO whiskers (SMCWs) were incorporated into nano hydroxyapatite (HA) contained polylactic acid (PLA) system to prepare the reinforced PLA/HA/SMCWs nanocomposite. Maleic anhydride grafted PLA (PLA-g-MAH) was then used to modify the interface between filler and matrix. The morphology, rheological behavior, crystallization, and mechanical property of the prepared nanocomposites were systematically investigated using scanning electronic microscope, dynamic rheometer, differential scanning calorimeter, polarized light microscope, and mechanical test, respectively. The results showed that the introduced PLA-g-MAH obviously improves the filler dispersion and the filler-matrix interfacial compatibility. Interestingly, the incorporated whiskers obviously decrease the complex viscosity and hence could significantly improve the processability of system. However, the introduction of PLA-g-MAH increases the complex viscosity to a greater extent. In addition, the added whiskers were found to have complicated influences on the PLA crystallization. On one hand, the incorporated whiskers can enhance the melt crystallization capability of PLA macromolecular chains; on the other hand, the introduced whiskers also show the inhibitive effect on the nucleation of PLA polymer chains and the inhibition degree is related to the loading of whiskers. The combination of whiskers and PLA-g-MAH could remarkably improve the mechanical performance of PLA/HA nanocomposite. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43381.

Poly(Lactic Acid)-Based Graft Copolymers: Syntheses Strategies and Improvement of Properties for Biomedical and Environmentally Friendly Applications: A Review

“…Compatibilizing effects of PLA-g-MA on the properties of PLA/Soy Protein concentrate (SPC) blends were demonstrated by a 19% increase in tensile strength compared to Compatibilizing effects of PLA-g-MA on the properties of PLA/Soy Protein concentrate (SPC) blends were demonstrated by a 19% increase in tensile strength compared to the non-compatibilized blend [62]. Finally, PLA-g-MA also has the ability to provide some compatibility to PLA/mineral mixtures such as PLA/carbon nanotubes [22], PLA/Titanium oxide [63], PLA/halloysite [64], PLA/hydroxyapatite [65], PLA/talc [66], PLA polyhedral oligomeric silsesquioxane (POSS) [67].…”

“…Molecules 2022, 27, x FOR PEER REVIEW 12 of 23 the non-compatibilized blend [62]. Finally, PLA-g-MA also has the ability to provide some compatibility to PLA/mineral mixtures such as PLA/carbon nanotubes [22], PLA/Titanium oxide [63], PLA/halloysite [64], PLA/hydroxyapatite [65], PLA/talc [66], PLA polyhedral oligomeric silsesquioxane (POSS) [67].…”

Structure and properties of nano-hydroxyapatite/poly(butylene succinate) porous scaffold for bone tissue engineering prepared by using ethanol as porogen

“…This may be because the incorporation of nHA particles impedes the movement of the macromolecular segments and the amplitude of movement of the polymer molecular chains is reduced at the same frequency, thereby reducing mechanical losses. 39 Figure 11(b) is a diagram of cole-cole. The cole-cole diagram shows the relationship between the imaginary viscosity(g 00 ) and real viscosity (g 0 ).…”

HA/PLA Composite Nanoparticles for Enhanced Oral Bioavailability of Capsaicin: Fabrication, Characterization and in vitro‐in vivo Evaluation

“…Liu et al [25] created 3D-printed PLA and HA scaffolds loaded with enhanced bone marrow binding-inducing membranes to repair large radial defects in rabbits, wherein the results revealed that it could be used to treat large bone defects. According to an extensive literature search, the composite materials formed by HA and PLA are mainly used for bone regeneration, [26,27] strengthening of the composite material properties, [28] coupled with improving biocompatibility [29] of drugs and other aspects. These studies have provided us with a theoretical basis and idea guidance for the fabrication of composite nanoparticles composed of HA and PLA.…”