Thermal degradation behaviour and crystallization kinetics of poly (lactic acid) and cellulose nanocrystals (CNC) based microcellular composite foams

Borkotoky, Shasanka Sekhar; Chakraborty, Gourhari; Katiyar, Vimal

doi:10.1016/j.ijbiomac.2018.06.202

Cited by 47 publications

(17 citation statements)

References 59 publications

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“…Since all the nanofibrils are wrapped, their adhesion to the matrix should be improved, and it would produce a low exposure of available OH, generating a hydrophobic PLA surface. This would not happen for the mixture, since the nanofibrils exhibit free OH available to interact with polar liquids (Bretas et al 2015;Borkotoky et al 2018).…”

Section: Contact Angle Measurementsmentioning

confidence: 99%

Graft modification in bamboo cellulose nanofibrils: An effective option to improve compatibility and tunable surface energy

Rodríguez-Ramírez¹,

Dufresne

D’Accorso

et al. 2021

Preprint

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In this work, from an endemic and non-significant value-added bamboo argentine, nanofibrils (CNFs) of 20 nm in width were obtained. These nanofibrils were chemical modified in surface with three simple steps using a noncommercial low molecular weight polylactic acid. The success of modification was confirmed by FTIR, TGA, DSC and XRD analysis. The modified nanofibrils were taken up for changing surface properties in films based on commercial PLA. The results show that dispersive (γ D/S) component of films increase of 34.7 mN/m to 36.1 mN/m after the addition of modified nanofibrils from 2 to 5% in formulation of the films, comparing with a physical blend. Interesting others result in physical, mechanical, and thermal properties of the nanocomposites, were reported.

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Section: Contact Angle Measurementsmentioning

confidence: 99%

Graft modification in bamboo cellulose nanofibrils: An effective option to improve compatibility and tunable surface energy

Rodríguez-Ramírez¹,

Dufresne

D’Accorso

et al. 2021

Preprint

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“…All kinetic degradation TGA experiments investigated using the general fundamental rate equation described as follows [5] where k and f(α) are rate constant and reaction model, respectively and α denotes the extent of conversion and is expressed as where W o is initial weight of sample; W t is sample weight at time t for a given temperature, and W f is final weight of sample. For dynamic TGA kinetic analysis, the following basic equation is used for determining the kinetic parameters including the apparent activation energy (E a )…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…5a) for different solid-state kinetic degradation models as described by Sergey et al [30]. The plots of Z (α) against α produced the master plots and experimental curves [5]. The shapes of the experimental curves (Fig.…”

Section: Thermal Isoconversional Degradation Analysis Of Cem and Cem-mentioning

confidence: 99%

Evaluation of thermal degradation and melt crystallization behavior of taro mucilage and its graft copolymer with poly(lactide)

2019

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This communication presents the thermal degradation behavior and non-isothermal crystallization kinetics of taro mucilage (CEM) and its graft copolymer polylactide (CEM-g-PLA) by thermogravimetric analysis (TGA/DTG coupled techniques) and differential scanning calorimetric. Isoconversional degradation analysis for CEM and CEM-g-PLA performed with the aid of Friedman, Kissinger (KSS), Flynn-Wall-Ozawa (FWO), and Kissinger-Akahira-Sunose (KAS) methods. The energy profiles and Criado plots over specific conversion (α) were able to predict that both CEM-g-PLA and CEM followed multi step kinetics and different degradation mechanisms. The Ozawa model fitted the melt crystallization data for CEM-g-PLA and its exponent (m) complements those for the modified Avrami and Tobin models. The crystallization of CEM-g-PLA was characterized with the formation of two distinct crystal growths. Further, the negative isoconversional activation energy suggested the occurrence of melt crystallization in CEM-g-PLA. Thus, the grafting of PLA onto CEM resulted into a material that shows thermal properties entirely different from that of its precursor (CEM) besides having an increased shelf life and not compromising with biodegradability. The analyzed data from the isoconversional equations (viz. Friedman, FWO and KAS models) and Ozawa model could be useful in modelling the degradation stability/mechanism and crystallization behavior of polylactide-grafted copolymer.

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“…Carbon nanotubes (CNCs) can be used in a variety of foam applications. 23,24 To stabilize the air–water interface, starch, both in the form of nanoparticles 25 or as such reinforced with CNF, 26 can be used. Proteins can also act as stabilizers.…”

Section: Introductionmentioning

confidence: 99%

Microalgae Chlorella vulgaris and kraft lignin stabilized cellulosic wet foams for camouflage

et al. 2022

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Thermal degradation behaviour and crystallization kinetics of poly (lactic acid) and cellulose nanocrystals (CNC) based microcellular composite foams

Cited by 47 publications

References 59 publications

Graft modification in bamboo cellulose nanofibrils: An effective option to improve compatibility and tunable surface energy

Graft modification in bamboo cellulose nanofibrils: An effective option to improve compatibility and tunable surface energy

Evaluation of thermal degradation and melt crystallization behavior of taro mucilage and its graft copolymer with poly(lactide)

Microalgae Chlorella vulgaris and kraft lignin stabilized cellulosic wet foams for camouflage

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