Uniformly Dispersed Poly(ethylene glycol) Functionalized Graphene Oxide/Poly(L-lactic acid) Nanocomposites with Balanced Mechanical Properties

Balanced mechanical properties are always the goal of high-performance general plastics for engineering purposes. In order to develop uniformly dispersed graphene oxide/poly(L-lactic acid) nanocomposites with balanced mechanical properties, a poly(ethylene glycol) (PEG) grafted graphene oxide was introduced into poly(L-lactic acid) (PLLA) matrix. The PEG grafted graphene oxide (GEG) was confirmed by the results of fourier transform infrared (FTIR) spectra and thermal gravimetric analysis (TGA). Then the mechanical properties of the nanohybrids were measured. The results showed that in contrast to the aggregation of GO, GEG could uniformly disperse in PLLA matrix. An intriguing phenomenon is that thanks to the strong interfacial interaction between GEG and PLLA, it exhibits a substantial enhancement of the elongation at break (EB) as well as a simultaneous improvement of the tensile strength (TS), while the addition of GO decreases the EB of PLLA matrix. This work provides a potential industrialized technique for high-performance PLLA nanocomposites

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Synthesis and investigation of the mechanical properties of poly(lactic acid)-(toluene diisocyanate)-poly(ethylene glycol)/poly(propylene glycol) copolymers

Polymers for Advanced Technologies ◽

10.1002/pat.400 ◽

2003 ◽

Vol 14 (11-12) ◽

pp. 813-819 ◽

Cited By ~ 12

Author(s):

Jenő Borda ◽

Ildikó Bodnár ◽

Istvánné Ráthy ◽

Miklós Zsuga

Keyword(s):

Mechanical Properties ◽

Lactic Acid ◽

Ethylene Glycol ◽

Propylene Glycol ◽

Toluene Diisocyanate ◽

Poly Lactic Acid ◽

Poly Ethylene Glycol ◽

Poly Ethylene ◽

Poly Propylene

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Improved Mechanical Properties of Graphene Oxide/Poly(ethylene oxide) Nanocomposites by Dynamic Interfacial Interaction of Coordination

Australian Journal of Chemistry ◽

10.1071/ch13339 ◽

2014 ◽

Vol 67 (1) ◽

pp. 121 ◽

Cited By ~ 15

Author(s):

Chen Lin ◽

Yi-Tao Liu ◽

Xu-Ming Xie

Keyword(s):

Mechanical Properties ◽

Graphene Oxide ◽

Ethylene Oxide ◽

High Performance ◽

Interfacial Interaction ◽

Divalent Metal Ions ◽

Strong Interfacial Interaction ◽

Poly Ethylene Oxide ◽

Coordination Bonds ◽

Poly Ethylene

A simple and cost-effective strategy to create a strong interfacial interaction of coordination bonds in graphene oxide/poly(ethylene oxide) (GO/PEO) nanocomposites by divalent metal ions are demonstrated in this study. The strong interfacial interaction realizes efficient load transfer during the tensile process to significantly improve the mechanical properties of PEO. In addition, the dynamic interfacial interaction of coordination bonds minimizes the elongation loss. This strategy is applicable to a variety of polymer matrices containing coordination atoms, thus opens up a new opportunity for high-performance GO/polymer nanocomposites with significantly improved mechanical properties.

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Chitin Nanofibrils in Poly(Lactic Acid) (PLA) Nanocomposites: Dispersion and Thermo-Mechanical Properties

International Journal of Molecular Sciences ◽

10.3390/ijms20030504 ◽

2019 ◽

Vol 20 (3) ◽

pp. 504 ◽

Cited By ~ 30

Author(s):

Maria-Beatrice Coltelli ◽

Patrizia Cinelli ◽

Vito Gigante ◽

Laura Aliotta ◽

Pierfrancesco Morganti ◽

...

Keyword(s):

Mechanical Properties ◽

Lactic Acid ◽

Ethylene Glycol ◽

Morphological Properties ◽

Water Evaporation ◽

Poly Lactic Acid ◽

Poly Ethylene Glycol ◽

Water Suspension ◽

Poly Ethylene ◽

Reinforcing Filler

Chitin-nanofibrils are obtained in water suspension at low concentration, as nanoparticles normally are, to avoid their aggregation. The addition of the fibrils in molten PLA during extrusion is thus difficult and disadvantageous. In the present paper, the use of poly(ethylene glycol) (PEG) is proposed to prepare a solid pre-composite by water evaporation. The pre-composite is then added to PLA in the extruder to obtain transparent nanocomposites. The amount of PEG and chitin nanofibrils was varied in the nanocomposites to compare the reinforcement due to nanofibrils and plasticization due to the presence of PEG, as well as for extrapolating, where possible, the properties of reinforcement due to chitin nanofibrils exclusively. Thermal and morphological properties of nanocomposites were also investigated. This study concluded that chitin nanofibrils, added as reinforcing filler up to 12% by weight, do not alter the properties of the PLA based material; hence, this additive can be used in bioplastic items mainly exploiting its intrinsic anti-microbial and skin regenerating properties.

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