Polyhydroxybutyrate blends: A solution for biodegradable packaging?

Popa, Mihaela; Frone, Adriana Nicoleta; Panaitescu, Denis Mihaela

doi:10.1016/j.ijbiomac.2022.02.185

Cited by 58 publications

(37 citation statements)

References 132 publications

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“…However, plasticizers may degrade at temperatures lower than PHB, accelerating its thermal degradation during melt processing, or migrate at the surface of the material, altering its mechanical properties [ 49 ]. A third method implies the melt blending of PHB with polymers such as medium chain length-PHAs [ 10 ], poly(caprolactone) (PCL), polyethylene glycol (PEG), poly(butylene adipate-co-terephthalate) (PBAT), and poly(butylene succinate) (PBS) etc. [ 10 , 50 , 51 ].…”

Section: Poly(3-hydroxybutyrate)mentioning

confidence: 99%

“…A third method implies the melt blending of PHB with polymers such as medium chain length-PHAs [ 10 ], poly(caprolactone) (PCL), polyethylene glycol (PEG), poly(butylene adipate-co-terephthalate) (PBAT), and poly(butylene succinate) (PBS) etc. [ 10 , 50 , 51 ]. In this case, it has been shown that the obtained blends have improved flexibility, toughness, and processability as compared to the pure PHB.…”

Section: Poly(3-hydroxybutyrate)mentioning

confidence: 99%

“…The barrier properties against water, light, gases or volatiles are essential when the PHB/CNCs nanocomposites are intended for food packaging application. Compared to other biopolymers, PHB shows better barrier properties due to its hydrophobicity, high crystallinity, and stereo-regularity [ 10 ], and the addition of CNCs may further improve these properties. Migration studies using nonpolar and polar food simulants were carried out on PHB/CNCs (1–5 wt%) nanocomposite films obtained by solvent casting [ 96 ] in order to determine if these substances can pass by diffusion or adsorption to a potential food product that was packaged using these nanocomposite films.…”

Section: Influence Of Cncs On the Properties Of Phb/cncs Nanocompositesmentioning

confidence: 99%

“…When the PHB/CNCs nanocomposites are intended for packaging fresh produce, a high barrier to oxygen is important [ 10 ]. It was observed that the incorporation of low CNCs loadings, of 1 and 2 wt%, into the PHB matrix led to a significant reduction in the oxygen transmission rate (OTR), with 46% and 65% [ 96 ].…”

Section: Influence Of Cncs On the Properties Of Phb/cncs Nanocompositesmentioning

confidence: 99%

“…However, despite these desirable properties its widespread industrial application, especially in the food packaging sector, has been limited due to its inherent physical aging, low ductility, limited processability, and low crystallization rates in the absence of nucleating agents [ 7 , 8 ]. Multiple strategies to overcome PHB’s drawbacks and to enhance its performance for targeted applications were proposed over time, including blending with other bio-based polymers [ 10 ], graft or block copolymerization, the use of specific additives (plasticizers, stabilizers, chain extenders, nucleating agents etc. ), and the addition of natural micro-/nano- reinforcing agents [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

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Poly(3-hydroxybutyrate) Nanocomposites with Cellulose Nanocrystals

et al. 2022

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Poly(3-hydroxybutyrate) (PHB) is one of the most promising substitutes for the petroleum-based polymers used in the packaging and biomedical fields due to its biodegradability, biocompatibility, good stiffness, and strength, along with its good gas-barrier properties. One route to overcome some of the PHB’s weaknesses, such as its slow crystallization, brittleness, modest thermal stability, and low melt strength is the addition of cellulose nanocrystals (CNCs) and the production of PHB/CNCs nanocomposites. Choosing the adequate processing technology for the fabrication of the PHB/CNCs nanocomposites and a suitable surface treatment for the CNCs are key factors in obtaining a good interfacial adhesion, superior thermal stability, and mechanical performances for the resulting nanocomposites. The information provided in this review related to the preparation routes, thermal, mechanical, and barrier properties of the PHB/CNCs nanocomposites may represent a starting point in finding new strategies to reduce the manufacturing costs or to design better technological solutions for the production of these materials at industrial scale. It is outlined in this review that the use of low-value biomass resources in the obtaining of both PHB and CNCs might be a safe track for a circular and bio-based economy. Undoubtedly, the PHB/CNCs nanocomposites will be an important part of a greener future in terms of successful replacement of the conventional plastic materials in many engineering and biomedical applications.

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Section: Poly(3-hydroxybutyrate)mentioning

confidence: 99%

Section: Poly(3-hydroxybutyrate)mentioning

confidence: 99%

Section: Influence Of Cncs On the Properties Of Phb/cncs Nanocompositesmentioning

confidence: 99%

Section: Influence Of Cncs On the Properties Of Phb/cncs Nanocompositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Poly(3-hydroxybutyrate) Nanocomposites with Cellulose Nanocrystals

et al. 2022

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Toughening Brittle Bio‐P3HB with Synthetic P3HB of Engineered Stereomicrostructures

Zhang,

Quinn,

Olmedo‐Martínez

et al. 2023

Angewandte Chemie

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Poly(3‐hydroxybutyrate) (P3HB), a biologically produced, biodegradable natural polyester, exhibits excellent thermal and barrier properties but suffers from mechanical brittleness, largely limiting its applications. Here we report a mono‐material product design strategy to toughen stereoperfect, brittle bio or synthetic P3HB by blending it with stereomicrostructurally engineered P3HB. Through tacticity ([mm] from 0 to 100%) and molecular weight (Mn to 788 kDa) tuning, high‐performance synthetic P3HB materials with tensile strength to ~30 MPa, fracture strain to ~800%, and toughness to 135 MJ m‐3 (>120× tougher than bio‐P3HB) have been produced. Physical blending of the brittle P3HB with such P3HB in 10 to 90 wt.% dramatically enhances its ductility from ~5% to 95 – 450% and optical clarity from 19% to 85% visible light transmittance, while maintaining desirably high elastic modulus (>1 GPa), tensile strength (>35 MPa), and melting temperature (160 – 170 °C). This P3HB‐toughening‐P3HB methodology departs from the traditional approach of incorporating chemically distinct components to toughen P3HB, which hinders chemical or mechanical recycling, highlighting the potential of the mono‐material product design solely based on biodegradable P3HB to deliver P3HB materials with diverse performance properties.

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