Molecular transport through 3-hydroxybutyrate co-3-hydroxyhexanoate biopolymer films with dispersed graphene oxide nanoparticles: Gas barrier, structural and mechanical properties

Mahmood, Haroon; Pegoretti, Alessandro; Brusa, R. S.; Ceccato, Riccardo; Penasa, L.; Tarter, S.; Checchetto, R.

doi:10.1016/j.polymertesting.2019.106181

Cited by 25 publications

(31 citation statements)

References 49 publications

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“…All thermograms are characterized by a first change at very low temperature (around 0 • C) in the corresponding baseline, which is attributable to the corresponding glass transition temperature (T g ). Neat PHBH is a thermoplastic with low T g , close to 0 • C; similar values to this have been reported in several studies with PHBH [14]. In a first analysis, it was determined that the addition of lignocellulosic filler, ASF, to PHBH, slightly decreases the T g to values comprised in the −0.5-1.9 • C range for all uncompatibilized composites.…”

Section: Thermal Properties Of Phbh-asf/ola Compositessupporting

confidence: 79%

“…The degree of crystallinity (X c ) was calculated by using Equation 1where ∆H m and ∆H cc (J g −1 ) are melt enthalpy and cold crystallization enthalpy respectively. ∆H 0 m (J g −1 ) is the theoretical value that corresponds to fully crystalline PHBH; this was taken as 146 (J g −1 ) as reported in Reference [14]. Finally, w is the fraction weight of PHBH.…”

Section: Thermal Characterization Of Phbh-asf/ola Compositesmentioning

confidence: 99%

“…Yang and Liao compare the formation of these units by dielectric spectroscopy and melt viscosity [10,11]. Moreover, the addition of the 3HH units extends the temperature range for processing of this copolymer, but the storage modulus and the strength is reduced [12][13][14][15]. Watanabe and Oyama, synthesized PHBH from cheap natural resources such as coconut oil, biomass, beet, sugar cane, molasses and vegetable oils [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Development and Characterization of Sustainable Composites from Bacterial Polyester Poly(3-Hydroxybutyrate-co-3-hydroxyhexanoate) and Almond Shell Flour by Reactive Extrusion with Oligomers of Lactic Acid

Ivorra-Martinez,

Manuel-Mañogil,

Boronat

et al. 2020

Polymers

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Eco-efficient Wood Plastic Composites (WPCs) have been obtained using poly(hydroxybutyrate-co-hexanoate) (PHBH) as the polymer matrix, and almond shell flour (ASF), a by-product from the agro-food industry, as filler/reinforcement. These WPCs were prepared with different amounts of lignocellulosic fillers (wt %), namely 10, 20 and 30. The mechanical characterization of these WPCs showed an important increase in their stiffness with increasing the wt % ASF content. In addition, lower tensile strength and impact strength were obtained. The field emission scanning electron microscopy (FESEM) study revealed the lack of continuity and poor adhesion among the PHBH-ASF interface. Even with the only addition of 10 wt % ASF, these green composites become highly brittle. Nevertheless, for real applications, the WPC with 30 wt % ASF is the most attracting material since it contributes to lowering the overall cost of the WPC and can be manufactured by injection moulding, but its properties are really compromised due to the lack of compatibility between the hydrophobic PHBH matrix and the hydrophilic lignocellulosic filler. To minimize this phenomenon, 10 and 20 phr (weight parts of OLA-Oligomeric Lactic Acid per one hundred weight parts of PHBH) were added to PHBH/ASF (30 wt % ASF) composites. Differential scanning calorimetry (DSC) suggested poor plasticization effect of OLA on PHBH-ASF composites. Nevertheless, the most important property OLA can provide to PHBH/ASF composites is somewhat compatibilization since some mechanical ductile properties are improved with OLA addition. The study by thermomechanical analysis (TMA), confirmed the increase of the coefficient of linear thermal expansion (CLTE) with increasing OLA content. The dynamic mechanical characterization (DTMA), revealed higher storage modulus, E’, with increasing ASF. Moreover, DTMA results confirmed poor plasticization of OLA on PHBH-ASF (30 wt % ASF) composites, but interesting compatibilization effects.

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Section: Thermal Properties Of Phbh-asf/ola Compositessupporting

confidence: 79%

Section: Thermal Characterization Of Phbh-asf/ola Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development and Characterization of Sustainable Composites from Bacterial Polyester Poly(3-Hydroxybutyrate-co-3-hydroxyhexanoate) and Almond Shell Flour by Reactive Extrusion with Oligomers of Lactic Acid

Ivorra-Martinez,

Manuel-Mañogil,

Boronat

et al. 2020

Polymers

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“…Details about the synthesis of PHBH, PHBH containing 0.25 wt% of graphene oxide (GO) filler nanoparticles (GO-PHBH), can be found in Ref. [5]. The 0.25 wt% was the highest GO content that was possible to add without producing very brittle PHBH film samples.…”

Section: Methodsmentioning

confidence: 99%

Open Volumes Structure and Molecular Transport in Biopolymer Nanocomposites

et al. 2020

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We discuss gas barrier mechanisms in biopolymer nanocomposite in which fillers of different natures and concentrations are added. The kinetics of gas transport is studied by gas phase permeation techniques and free volumes are analyzed by positron annihilation lifetime spectroscopy. Gas barrier properties of two biopolymer nanocomposite films are presented in relation to their free volume. The first film is poly(3-hydroxybutyrate-co-3hydroxyhexanoate) (PHBH) containing 0.25 wt% of graphene oxide (GO) filler nanoparticles. The second film is poly(lactic acid) (PLA) in which cellulose nanofibrils have been dispersed with content from 4.1 to 12.4 vol.%. It is shown that in both biopolymer films the filler addition improves their gas barrier properties but with different mechanism.

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“…Recently, polyhydroxyalkanoate and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) were incorporated into 2D membranes, which are promising for biomedical applications. Mahmood et al 99 explored the solution-casting method to fabricate PHBH nanocomposite films containing 0.25 wt% of GO nanoparticles. By introducing GO particles as preferential nucleation sites, they achieved a GO-PHBH composite film with a large density of gas-impermeable crystalline domains.…”

Section: Applications Of Go and Rgo Polymer Composites 41 Efficient mentioning

confidence: 99%

Perspectives in the design and application of composites based on graphene derivatives and bio‐based polymers

Chen

Yang

Leng

et al. 2020

Polymer International

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Two-dimensional materials (2DMs), especially graphene derivatives, have attracted a wide range of interest in science and technology because of their exceptional physical and chemical properties and large potential application areas in electrochemistry, photonics, bioengineering, electronics and membrane separation fields. Our review focuses on recent advances in the construction of new functional composites using graphene oxide (GO), reduced graphene oxide (rGO) and bio-based macromolecules. The incorporation of bio-based polymers into GO and rGO nanolayers provides a novel way to tailor the properties of 2DMs. Meanwhile, 2DMs/bio-based polymer composites are sustainable and biocompatible. Benefiting from the combination of superior properties of both materials, they are endowed with new functions and new application areas. Here, we compare existing fabrication approaches for 2DMs/bio-based polymer composites. Then, we highlight the properties of composites such as ionic conductivity, molecular transport, mechanical properties, biocompatibility and sustainability. Finally, we discuss recent progress in applications of 2DMs/bio-based polymer composites for efficient ionic and molecular separation technologies, the construction of energy-related devices including fuel cells and transistors, and biomedical engineering.

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Molecular transport through 3-hydroxybutyrate co-3-hydroxyhexanoate biopolymer films with dispersed graphene oxide nanoparticles: Gas barrier, structural and mechanical properties

Cited by 25 publications

References 49 publications

Development and Characterization of Sustainable Composites from Bacterial Polyester Poly(3-Hydroxybutyrate-co-3-hydroxyhexanoate) and Almond Shell Flour by Reactive Extrusion with Oligomers of Lactic Acid

Development and Characterization of Sustainable Composites from Bacterial Polyester Poly(3-Hydroxybutyrate-co-3-hydroxyhexanoate) and Almond Shell Flour by Reactive Extrusion with Oligomers of Lactic Acid

Open Volumes Structure and Molecular Transport in Biopolymer Nanocomposites

Perspectives in the design and application of composites based on graphene derivatives and bio‐based polymers

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