Crystallization kinetics and melting behaviors of poly(l-lactide)/graphene oxides composites

Chen, Haiming; Zhang, Wenbing; Du, Xue-chong; Yang, Jing‐hui; Zhang, Nan; Huang, Ting; Wang, Yong

doi:10.1016/j.tca.2013.05.018

Cited by 46 publications

(31 citation statements)

References 48 publications

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“…Figure a shows the absorbance graph of starch nanocomposites film reinforced with cellulose nanofibers. To avoid the oxidative rancidity catalysed by UV light, the packaging film could able to absorb UV region . In case the films were not UV responsive the packaging films must be irradiated with UV light to destroy the microbial charge .…”

Section: Resultsmentioning

confidence: 99%

UV resistant transparent bionanocomposite films based on potato starch/cellulose for sustainable packaging

et al. 2017

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Biobased polymers are considered as a promising alternative to conventional synthetic plastics from fossil fuels to recompense the draining resources for petroleum-based products, which addresses several environmental issues. Here, briefly, cellulose nanofibers were isolated from pineapple leaves and the quality of the prepared nanofibers was characterized using advanced instrumental technologies. Poor mechanical properties, barrier properties, and the hygroscopic nature are notable issues that reduce the shelf life of starch-based films, which can be rectified by the addition of nanoscale fillers. The impact of filler reinforcement on the films was investigated in different aspects. Morphology, UV shielding, wettability, and thermal degradation were carefully analyzed using polarized optical microscopy, UV-vis spectroscopy, static water contact angle measurements, and thermal gravimetric analysis, respectively. The water contact angle increases from neat TPS to nanocomposites with 3 wt% of CNF (41.25 0 to 51.77 0 ) and the water vapor permeability decreases from 7.32 to 5.68 Â 10 À2 g min À1 m À2 for 3 wt% CNF loading. Also, several enhanced properties were observed for the final product quality with respect to the reference sample, including that the potato starch/cellulose nanocomposite films were found to be UV resistant, and that higher transparency indicates the nanoscale dispersion. Further studies are anticipated to develop the materials on an industrial scale.

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Section: Resultsmentioning

confidence: 99%

UV resistant transparent bionanocomposite films based on potato starch/cellulose for sustainable packaging

et al. 2017

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“…The role of graphene and, especially graphene oxide, as nucleating agent was already clarified in Ref. . They found a significant increase in melt crystallization rates of PLAs reinforced by graphene oxide, indicating that graphene oxyde (GO) might act as an effective nucleating agent.…”

Section: Resultsmentioning

confidence: 99%

Graphene‐modified poly(lactic acid) for packaging: Material formulation, processing and performance

Barletta

Puopolo

Tagliaferri

et al. 2015

J of Applied Polymer Sci

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Manufacturing of plastics by compostable polymers is of crucial relevance to limit the environmental impact and reduce oil consumption. Performance of compostable polymers is often mediocre, although they could be improved by physical and chemical routes. In this work, Poly(Lactic Acid) (PLA) is modified for improved performance by two different routes: (1) by physically dispersing Graphene Nano-Platelets (GNP) in the organic matrix; (2) by the physical dispersion and covalent bonding of PLA and Amino-Functionalized Nano-Silica (A-fSiO2). Functionalization of the PLAs after compounding and pelletizing was assessed by combined Fourier Transform Infrared (FT-IR). In addition, thermal analysis was performed by Differential Scanning Calorimetry (DSC). Mechanical response was evaluated on compression molded flat slabs of the modified PLAs by Pencil and progressive and constant load scratch tests. Chemical endurance was evaluated on compression molded flat slabs of the modified PLAs by dipping in aggressive acidic, basic, and saline environments. Finally, the modified PLAs were successfully injection molded to manufacture high performance coffee capsules, whose thermal stability and suitability to coffee brewing were demonstrated. © 2015 Wiley Periodicals, Inc

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“…According to Chen et al ., who examined the isothermal crystallization and subsequent melting behavior of neat PLLA ( M w = 253 000 g mol −1 ) and GO/PLLA composites containing 0.1, 0.5, 1.0 and 2.0 wt% GO at 102, 105, 108 and 110 °C and 110, 112, 115 and 118 °C, respectively, during the isothermal crystallization process, addition of only 0.1 wt% GO markedly accelerates crystallization of the PLLA matrix and the crystallization half‐time is markedly decreased 30 . Based on this research, high concentration of GOs is unfavorable for the crystal perfection of PLLA.…”

Section: Discussionmentioning

confidence: 99%

Study of thermomechanical, structural and antibacterial properties of poly(lactic acid) reinforced with graphene oxide nanoparticles via melt mixing

Athanasoulia

Giachalis

Korres

et al. 2020

Polymer International

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Addition of graphene oxide (GO) to poly(l‐lactic acid) (PLLA) offers an alternative approach for tuning its crystallinity, improving its mechanical properties and transfusing an antibacterial behavior. GO/PLLA nanocomposites were prepared by melt extrusion, thus avoiding the potentially toxic, for biomedical applications, residue of organic solvents. Fourier transform infrared spectroscopy verified the formation of intermolecular hydrogen bonds. Using differential scanning calorimetry experiments concerning the isothermal crystallization of PLLA and PLLA containing 0.4 wt% GO, a two‐dimensional disc‐like geometry of crystal growth was determined, whereas at 125 and 130 °C the nanocomposite developed three‐dimensional spherulitic growth. Higher crystallization rate constant values suggest that the incorporation of 0.4 wt% GO accelerated the crystallization of PLLA. The lowest crystallization half‐time for PLLA was observed at 115 °C, while at 110 °C GO caused its highest decrease, accompanied by the highest increase in melting enthalpy (ΔHm), as compared to that of PLLA, after completion of isothermal crystallization. Their ΔHm values increased with Tic, whereas multiple melting peaks transited to a single one with increasing Tic. GO improved the PLLA thermal stability, tensile strength and Young's modulus. Incorporation of 0.8 wt% GO endowed PLLA with another potential application as a biomaterial since the derived composite presented good thermomechanical properties and effective prohibition of Escherichia coli bacteria attachment and proliferation. This effect was more prominent under simulated sunlight exposure than in the dark. The preparation method did not compromise the intrinsic properties of GO. © 2020 Society of Chemical Industry

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Crystallization kinetics and melting behaviors of poly(l-lactide)/graphene oxides composites

Cited by 46 publications

References 48 publications

UV resistant transparent bionanocomposite films based on potato starch/cellulose for sustainable packaging

UV resistant transparent bionanocomposite films based on potato starch/cellulose for sustainable packaging

Graphene‐modified poly(lactic acid) for packaging: Material formulation, processing and performance

Study of thermomechanical, structural and antibacterial properties of poly(lactic acid) reinforced with graphene oxide nanoparticles via melt mixing

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