The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
Amar K Mohanty - One of the best experts on this subject based on the ideXlab platform.
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reactive Extrusion of sustainable phbv pbat based nanocomposite Films with organically modified nanoclay for packaging applications compression moulding vs Cast Film Extrusion
Composites Part B-engineering, 2020Co-Authors: Akhilesh K Pal, Manjusri Misra, Amar K MohantyAbstract:Abstract The mechanical, thermal and barrier properties of a sustainable PHBV/PBAT blend was investigated under the influence of organically modified nanoclay (0.6, 1.2 and 1.8 wt%) after processing by two different techniques i.e. compression moulding and Cast Film Extrusion. Firstly, a pelletized nanoclay masterbatch was fabricated by blending PBAT with 20% nanoclay using melt Extrusion. The masterbatch was used as a reinforcement phase for the PHBV/PBAT blend matrix to fabricate nanocomposite pellets using a melt Extrusion process. The prepared PHBV/PBAT/Nanoclay nanocomposite pellets were used to fabricate Films using compression moulding and Cast Film Extrusion. The Cast extruded PHBV/PBAT nanocomposite Films showed improved barrier properties (oxygen and water vapour) as compared to compression moulded Films because of the chain orientation during the high-speed stretching. The barrier properties results showed significant improvement of ~79 and ~70% in oxygen and water vapour permeability respectively in Cast PHBV/PBAT composite Films after adding 1.2 wt% nanoclay, which indicates a good dispersion of nanoclay and strong interfacial adhesion between the matrix and filler. The intercalation/exfoliation of nanoclay in PHBV, as well as at the interface of the PHBV and PBAT blend matrix, was confirmed by transmission electron microscopy (TEM). The % elongation at break (567.6 ± 0.1) of the Cast PHBV/PBAT/Nanoclay(1.2%) nanocomposite Film was highly improved as compared to that of the PHBV/PBAT blend due to better stress transfer ability as compared to the compression moulded Film. The rheological properties also support better dispersion of nanoclay and interaction between the matrix and filler. Hence, the Cast extruded nanocomposite Film with 1.2% nanoclay is a potential candidate to be used in flexible packaging.
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Reactive Extrusion of sustainable PHBV/PBAT-based nanocomposite Films with organically modified nanoclay for packaging applications: Compression moulding vs. Cast Film Extrusion
Composites Part B-engineering, 2020Co-Authors: Feng Wu, Manjusri Misra, Amar K MohantyAbstract:Abstract The mechanical, thermal and barrier properties of a sustainable PHBV/PBAT blend was investigated under the influence of organically modified nanoclay (0.6, 1.2 and 1.8 wt%) after processing by two different techniques i.e. compression moulding and Cast Film Extrusion. Firstly, a pelletized nanoclay masterbatch was fabricated by blending PBAT with 20% nanoclay using melt Extrusion. The masterbatch was used as a reinforcement phase for the PHBV/PBAT blend matrix to fabricate nanocomposite pellets using a melt Extrusion process. The prepared PHBV/PBAT/Nanoclay nanocomposite pellets were used to fabricate Films using compression moulding and Cast Film Extrusion. The Cast extruded PHBV/PBAT nanocomposite Films showed improved barrier properties (oxygen and water vapour) as compared to compression moulded Films because of the chain orientation during the high-speed stretching. The barrier properties results showed significant improvement of ~79 and ~70% in oxygen and water vapour permeability respectively in Cast PHBV/PBAT composite Films after adding 1.2 wt% nanoclay, which indicates a good dispersion of nanoclay and strong interfacial adhesion between the matrix and filler. The intercalation/exfoliation of nanoclay in PHBV, as well as at the interface of the PHBV and PBAT blend matrix, was confirmed by transmission electron microscopy (TEM). The % elongation at break (567.6 ± 0.1) of the Cast PHBV/PBAT/Nanoclay(1.2%) nanocomposite Film was highly improved as compared to that of the PHBV/PBAT blend due to better stress transfer ability as compared to the compression moulded Film. The rheological properties also support better dispersion of nanoclay and interaction between the matrix and filler. Hence, the Cast extruded nanocomposite Film with 1.2% nanoclay is a potential candidate to be used in flexible packaging.
Carlos Enrique Schvezov - One of the best experts on this subject based on the ideXlab platform.
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Toughening of poly(lactic acid) and thermoplastic cassava starch reactive blends using graphene nanoplatelets
Polymers, 2018Co-Authors: Anibal Bher, Ilke Uysal Unalan, Michele Rubino, Rafael Auras, Carlos Enrique SchvezovAbstract:Poly(lactic acid) (PLA) was reactively blended with thermoplastic cassava starch (TPCS) and functionalized with commercial graphene (GRH) nanoplatelets in a twin-screw extruder, and Films were produced by Cast-Film Extrusion. Reactive compatibilization between PLA and TPCS phases was reached by introducing maleic anhydride and a peroxide radical during the reactive blending Extrusion process. Films with improved elongation at break and toughness for neat PLA and PLA-g-TPCS reactive blends were obtained by an addition of GRH nanoplatelets. Toughness of the PLA-g-TPCS-GRH was improved by ~900% and ~500% when compared to neat PLA and PLA-g-TPCS, respectively. Crack bridging was established as the primary mechanism responsible for the improvement in the mechanical properties of PLA and PLA-g-TPCS in the presence of the nanofiller due to the high aspect ratio of GRH. Scanning electron microscopy images showed a non-uniform distribution of GRH nanoplatelets in the matrix. Transmittance of the reactive blend Films decreased due to the TPCS phase. Values obtained for the reactive blends showed ~20% transmittance. PLA-GRH and PLA-g-TPCS-GRH showed a reduction of the oxygen permeability coefficient with respect to PLA of around 35% and 50%, respectively. Thermal properties, molecular structure, surface roughness, XRD pattern, electrical resistivity, and color of the Films were also evaluated. Biobased and compostable reactive blend Films of PLA-g-TPCS compounded with GRH nanoplatelets could be suitable for food packaging and agricultural applications.
Akhilesh K Pal - One of the best experts on this subject based on the ideXlab platform.
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reactive Extrusion of sustainable phbv pbat based nanocomposite Films with organically modified nanoclay for packaging applications compression moulding vs Cast Film Extrusion
Composites Part B-engineering, 2020Co-Authors: Akhilesh K Pal, Manjusri Misra, Amar K MohantyAbstract:Abstract The mechanical, thermal and barrier properties of a sustainable PHBV/PBAT blend was investigated under the influence of organically modified nanoclay (0.6, 1.2 and 1.8 wt%) after processing by two different techniques i.e. compression moulding and Cast Film Extrusion. Firstly, a pelletized nanoclay masterbatch was fabricated by blending PBAT with 20% nanoclay using melt Extrusion. The masterbatch was used as a reinforcement phase for the PHBV/PBAT blend matrix to fabricate nanocomposite pellets using a melt Extrusion process. The prepared PHBV/PBAT/Nanoclay nanocomposite pellets were used to fabricate Films using compression moulding and Cast Film Extrusion. The Cast extruded PHBV/PBAT nanocomposite Films showed improved barrier properties (oxygen and water vapour) as compared to compression moulded Films because of the chain orientation during the high-speed stretching. The barrier properties results showed significant improvement of ~79 and ~70% in oxygen and water vapour permeability respectively in Cast PHBV/PBAT composite Films after adding 1.2 wt% nanoclay, which indicates a good dispersion of nanoclay and strong interfacial adhesion between the matrix and filler. The intercalation/exfoliation of nanoclay in PHBV, as well as at the interface of the PHBV and PBAT blend matrix, was confirmed by transmission electron microscopy (TEM). The % elongation at break (567.6 ± 0.1) of the Cast PHBV/PBAT/Nanoclay(1.2%) nanocomposite Film was highly improved as compared to that of the PHBV/PBAT blend due to better stress transfer ability as compared to the compression moulded Film. The rheological properties also support better dispersion of nanoclay and interaction between the matrix and filler. Hence, the Cast extruded nanocomposite Film with 1.2% nanoclay is a potential candidate to be used in flexible packaging.
Anibal Bher - One of the best experts on this subject based on the ideXlab platform.
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Toughening of poly(lactic acid) and thermoplastic cassava starch reactive blends using graphene nanoplatelets
Polymers, 2018Co-Authors: Anibal Bher, Ilke Uysal Unalan, Michele Rubino, Rafael Auras, Carlos Enrique SchvezovAbstract:Poly(lactic acid) (PLA) was reactively blended with thermoplastic cassava starch (TPCS) and functionalized with commercial graphene (GRH) nanoplatelets in a twin-screw extruder, and Films were produced by Cast-Film Extrusion. Reactive compatibilization between PLA and TPCS phases was reached by introducing maleic anhydride and a peroxide radical during the reactive blending Extrusion process. Films with improved elongation at break and toughness for neat PLA and PLA-g-TPCS reactive blends were obtained by an addition of GRH nanoplatelets. Toughness of the PLA-g-TPCS-GRH was improved by ~900% and ~500% when compared to neat PLA and PLA-g-TPCS, respectively. Crack bridging was established as the primary mechanism responsible for the improvement in the mechanical properties of PLA and PLA-g-TPCS in the presence of the nanofiller due to the high aspect ratio of GRH. Scanning electron microscopy images showed a non-uniform distribution of GRH nanoplatelets in the matrix. Transmittance of the reactive blend Films decreased due to the TPCS phase. Values obtained for the reactive blends showed ~20% transmittance. PLA-GRH and PLA-g-TPCS-GRH showed a reduction of the oxygen permeability coefficient with respect to PLA of around 35% and 50%, respectively. Thermal properties, molecular structure, surface roughness, XRD pattern, electrical resistivity, and color of the Films were also evaluated. Biobased and compostable reactive blend Films of PLA-g-TPCS compounded with GRH nanoplatelets could be suitable for food packaging and agricultural applications.
Manjusri Misra - One of the best experts on this subject based on the ideXlab platform.
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reactive Extrusion of sustainable phbv pbat based nanocomposite Films with organically modified nanoclay for packaging applications compression moulding vs Cast Film Extrusion
Composites Part B-engineering, 2020Co-Authors: Akhilesh K Pal, Manjusri Misra, Amar K MohantyAbstract:Abstract The mechanical, thermal and barrier properties of a sustainable PHBV/PBAT blend was investigated under the influence of organically modified nanoclay (0.6, 1.2 and 1.8 wt%) after processing by two different techniques i.e. compression moulding and Cast Film Extrusion. Firstly, a pelletized nanoclay masterbatch was fabricated by blending PBAT with 20% nanoclay using melt Extrusion. The masterbatch was used as a reinforcement phase for the PHBV/PBAT blend matrix to fabricate nanocomposite pellets using a melt Extrusion process. The prepared PHBV/PBAT/Nanoclay nanocomposite pellets were used to fabricate Films using compression moulding and Cast Film Extrusion. The Cast extruded PHBV/PBAT nanocomposite Films showed improved barrier properties (oxygen and water vapour) as compared to compression moulded Films because of the chain orientation during the high-speed stretching. The barrier properties results showed significant improvement of ~79 and ~70% in oxygen and water vapour permeability respectively in Cast PHBV/PBAT composite Films after adding 1.2 wt% nanoclay, which indicates a good dispersion of nanoclay and strong interfacial adhesion between the matrix and filler. The intercalation/exfoliation of nanoclay in PHBV, as well as at the interface of the PHBV and PBAT blend matrix, was confirmed by transmission electron microscopy (TEM). The % elongation at break (567.6 ± 0.1) of the Cast PHBV/PBAT/Nanoclay(1.2%) nanocomposite Film was highly improved as compared to that of the PHBV/PBAT blend due to better stress transfer ability as compared to the compression moulded Film. The rheological properties also support better dispersion of nanoclay and interaction between the matrix and filler. Hence, the Cast extruded nanocomposite Film with 1.2% nanoclay is a potential candidate to be used in flexible packaging.
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Reactive Extrusion of sustainable PHBV/PBAT-based nanocomposite Films with organically modified nanoclay for packaging applications: Compression moulding vs. Cast Film Extrusion
Composites Part B-engineering, 2020Co-Authors: Feng Wu, Manjusri Misra, Amar K MohantyAbstract:Abstract The mechanical, thermal and barrier properties of a sustainable PHBV/PBAT blend was investigated under the influence of organically modified nanoclay (0.6, 1.2 and 1.8 wt%) after processing by two different techniques i.e. compression moulding and Cast Film Extrusion. Firstly, a pelletized nanoclay masterbatch was fabricated by blending PBAT with 20% nanoclay using melt Extrusion. The masterbatch was used as a reinforcement phase for the PHBV/PBAT blend matrix to fabricate nanocomposite pellets using a melt Extrusion process. The prepared PHBV/PBAT/Nanoclay nanocomposite pellets were used to fabricate Films using compression moulding and Cast Film Extrusion. The Cast extruded PHBV/PBAT nanocomposite Films showed improved barrier properties (oxygen and water vapour) as compared to compression moulded Films because of the chain orientation during the high-speed stretching. The barrier properties results showed significant improvement of ~79 and ~70% in oxygen and water vapour permeability respectively in Cast PHBV/PBAT composite Films after adding 1.2 wt% nanoclay, which indicates a good dispersion of nanoclay and strong interfacial adhesion between the matrix and filler. The intercalation/exfoliation of nanoclay in PHBV, as well as at the interface of the PHBV and PBAT blend matrix, was confirmed by transmission electron microscopy (TEM). The % elongation at break (567.6 ± 0.1) of the Cast PHBV/PBAT/Nanoclay(1.2%) nanocomposite Film was highly improved as compared to that of the PHBV/PBAT blend due to better stress transfer ability as compared to the compression moulded Film. The rheological properties also support better dispersion of nanoclay and interaction between the matrix and filler. Hence, the Cast extruded nanocomposite Film with 1.2% nanoclay is a potential candidate to be used in flexible packaging.