Microstructure and nonisothermal cold crystallization of PLA composites based on silver nanoparticles and nanocrystalline cellulose

Fortunati, Elena; Armentano, Ilaria; Zhou, Qi; Puglia, Debora; Terenzi, Andrea; Berglund, Lars A.; Kenny, J. M.

doi:10.1016/j.polymdegradstab.2012.03.027

Cited by 210 publications

(126 citation statements)

References 36 publications

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“…Much research has been made to reinforce PLA with typically natural plant fibres [4][5][6][7][8][9][10][11][12][13] or even with glass [26] or basalt [27] fibres to make PLA based biocomposites suitable for high temperature engineering applications. By incorporating natural plant fibres to PLA in order to increase HDT it is critical to form strong connection between the fibres and the matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the significant amount of research, the increase of HDT is only a few times reported, which can be related to the low modulus of plant fibres. At the same time the fibres not only increase the modulus of the PLA, but the nucleating effect of microcellulose [10,11] and nanocellulose [12,13] fibre derivates was also demonstrated, however, significant crystallinity was only proved to develop at low cooling rates as 2°C min -1 [13], 5°C min -1 [10], 10°C min -1 [11,12] by using differential scanning calorimetry (DSC) tests. By using fibres with much higher stiffness like glass [26] and basalt fibres [27] the HDT was still only increased by 9°C and 5°C respectively.…”

Section: Introductionmentioning

confidence: 99%

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Thermal and mechanical analysis of injection moulded poly(lactic acid) filled with poly(ethylene glycol) and talc

Tábi

Suplicz

Czigány

et al. 2014

J Therm Anal Calorim

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In our research, the effect of talc particle size was analysed on the thermal and mechanical properties of renewable resource based, biodegradable polymer Poly(Lactic Acid) (PLA). Various talc particles with an average particle size of 24 μm, 1.9 μm, and 0.7 μm were blend mixed with PLA in 10 and 20 mass% containing no or an additional 10 mass% of Poly(Ethylene Glycol) (PEG) to increase molecular chain mobility. It was demonstrated that with decreasing talc particle size, its nucleation ability increased as well as all of the investigated mechanical properties of the compounds, however, in case of compounds containing PEG, this tendency was the opposite according to Charpy impact strength results. The talc with the best nucleating ability was selected and a full factorial design of experiment was made to optimise the talc and PEG content and to investigate their cross-effect in the 1-3-5-10-15 mass% additive content range. Finally, the effect of mould temperature and cooling time was analysed on the crystallinity and heat deflection temperature of the final injection moulded parts.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal and mechanical analysis of injection moulded poly(lactic acid) filled with poly(ethylene glycol) and talc

Tábi

Suplicz

Czigány

et al. 2014

J Therm Anal Calorim

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“…For example, the literature reported plasticizing of PLA by surfactant adsorbed on cellulose nanocrystals (Fortunati et al 2012a), cellulose nanowhiskers grafted by n-octadecyl-isocyanate (Espino-Pérez et al 2013) and lactide oligomers attached to cellulose nanowhiskers (Goffin et al 2011). The effect of increased storage modulus and decreased glass transition temperature was found, for example, for PLA/nanocrystalline cellulose nanocomposites by Fortunati et al (2012b). On the other hand, the polymer-filler interactions are known to have opposite effect of rendering the a relaxation of polymer matrix and shifting it towards higher temperatures (Ahn et al 2009;Papon et al 2012;Raftopoulos and Pielichowski 2015).…”

Section: Dynamic Mechanical Analysis Of Pa410/mfc-ac Compositesmentioning

confidence: 99%

Biocomposites of polyamide 4.10 and surface modified microfibrillated cellulose (MFC): influence of processing parameters on structure and thermomechanical properties

2015

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Novel bio-polyamides obtained from renewable resources, e.g. PA4.10, are considered nowadays as promising 'green' engineering materials consisting of building blocks derived from castor oil. In this work the composites of heterogeneously acetylated microfibrillated cellulose (MFC) and biopolyamide 4.10 have been prepared by melt blending. Thermoplastic processing of PA4.10/MFC composites was possible in a narrow temperature window due to significant improvement of thermal stability of acetylated MFC as compared to raw MFC. The increase of thermooxidative stability of filler was due to removal of non-cellulosic components from the raw material and introduction of acetic moieties that had additional slight stabilizing effect on MFC. Moreover, the modified MFC showed significant changes in morphology that favoured its dispersibility in viscous polymer melt. Combined treatment of MFC by chemical agents, which caused partial hydrolysis of amorphous regions, and physical disintegration by ultrasonic waves resulted in formation of fibrous material with low degree of entanglement and submicron or nanometric diameters. In the tested range of screw speeds it was found that at screw speed of 100 rpm the shearing forces were sufficient for dispersing MFC agglomerates and the melt pressure secured evacuation of gases introduced to plasticizing system of extruder with MFC-Ac aerogel. The dynamic mechanical properties of obtained (nano)-composites were influenced by both mechanical strengthening of rigid cellulose micro and nanofibers as well as susceptibility of biopolymers towards oxidation and thermomechanical degradation during processing.

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“…PLA shows good potential for applications in many industrial sectors such as biomedical, automotive and packaging [2] due to its good mechanical strength, excellent biodegradability, biocompatibility and easy processability [3,4]. However, the limitation of this biodegradable polymer is brittleness [3].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of reactive blends of poly(lactic acid), poly(ethylene-co-vinyl alcohol), and poly(ethylene-co-glycidyl methacrylate)

Phromma

Jana

Magaraphan

2015

AIP Conference Proceedings

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Microstructure and nonisothermal cold crystallization of PLA composites based on silver nanoparticles and nanocrystalline cellulose

Cited by 210 publications

References 36 publications

Thermal and mechanical analysis of injection moulded poly(lactic acid) filled with poly(ethylene glycol) and talc

Thermal and mechanical analysis of injection moulded poly(lactic acid) filled with poly(ethylene glycol) and talc

Biocomposites of polyamide 4.10 and surface modified microfibrillated cellulose (MFC): influence of processing parameters on structure and thermomechanical properties

Preparation and characterization of reactive blends of poly(lactic acid), poly(ethylene-co-vinyl alcohol), and poly(ethylene-co-glycidyl methacrylate)

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