Cellulose‐Reinforced Biocomposites Based on<scp>PHB</scp>and<scp>PHBV</scp>for Food Packaging Applications

Sánchez-Safont, Estefanía; Museros, Lledó; Gámez‐Pérez, José

doi:10.1002/9783527820078.ch8

Cited by 8 publications

(8 citation statements)

References 135 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, highly crystalline PHAs, such as PHBV with low 3HV content, exhibit an intrinsic fragile character, this brittleness being dependent on the developed crystallinity [18,72]. Furthermore, PHAs suffer a further progressive embrittlement over time, which is attributed to a combination of two phenomena: a secondary crystallization process and physical ageing of the amorphous phase when T > T g [16].…”

Section: Mechanical Behaviourmentioning

confidence: 99%

“…Based on the chain length (CL) of the monomers they are made from, PHAs can be categorized into three groups: short (SCL-PHA, 3-5 carbon atoms), medium (MCL-PHA, 6-14 C), and long (LCL-PHA, >15 C). Generally, SCL-PHAs are rigid, brittle, and high-crystalline thermoplastics, while MCL-and LCL-PHAs are flexible, ductile, and show lower crystallinity [16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development and Characterization of Fully Renewable and Biodegradable Polyhydroxyalkanoate Blends with Improved Thermoformability

et al. 2022

Self Cite

View full text Add to dashboard Cite

Poly(3-hydroxybutyrate-co-3-valerate) (PHBV), being one of the most studied and commercially available polyhydroxyalkanoates (PHAs), presents an intrinsic brittleness and narrow processing window that currently hinders its use in several plastic applications. The aim of this study was to develop a biodegradable PHA-based blend by combining PHBV with poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH), another copolyester of the PHA family that shows a more ductile behavior. Blends of PHBV with 20% wt., 30% wt., and 40% wt. of PHBH were obtained by melt mixing, processed by cast extrusion in the form of films, and characterized in terms of their morphology, crystallization behavior, thermal stability, mechanical properties, and thermoformability. Full miscibility of both biopolymers was observed in the amorphous phase due to the presence of a single delta peak, ranging from 4.5 °C to 13.7 °C. Moreover, the incorporation of PHBH hindered the crystallization process of PHBV by decreasing the spherulite growth rate from 1.0 µm/min to 0.3 µm/min. However, for the entire composition range studied, the high brittleness of the resulting materials remained since the presence of PHBH did not prevent the PHBV crystalline phase from governing the mechanical behavior of the blend. Interestingly, the addition of PHBH greatly improved the thermoformability by widening the processing window of PHBV by 7 s, as a result of the increase in the melt strength of the blends even for the lowest PHBH content.

show abstract

Section: Mechanical Behaviourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development and Characterization of Fully Renewable and Biodegradable Polyhydroxyalkanoate Blends with Improved Thermoformability

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…In contrast, viscoelastic properties such as the storage modulus, loss modulus and the damping properties (tan δ) are rarely reported. For applications of commercial PHB, detailed characterizations of PHB composites with cellulose fibers have been reported, 15,16 which can be used in food packaging 17 …”

Section: Introductionmentioning

confidence: 99%

“…For applications of commercial PHB, detailed characterizations of PHB composites with cellulose fibers have been reported, 15,16 which can be used in food packaging. 17 PHB synthesized from glucose or vegetable oils have a high degree of crystallinity ranging from 60% to 80%. 18 The material properties mostly change when different monomers are used (such as 3-hydroxyvalerate or aromatic side chains from lignin precursors).…”

Section: Introductionmentioning

confidence: 99%

In‐depth material characterization of polyhydroxybutyrate from a forest biorefinery

Dietrich

Dumont

Orsat

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Large-scale replacement of petroplastics with compostable plastics, like polyhydroxybutyrates (PHB) will contribute to elimination plastic pollution, decrease greenhouse gas emissions, and valorize local biomass resources. Lignocellulose hydrolysates have emerged as potentially sustainable carbon sources for PHB production. For industrial processing, it is necessary to know the polymer properties. Yet, most studies on PHB samples from lignocellulose report few material properties. PHB samples produced from a pilot scale hardwood holocellulose hydrolysate conversion process were characterized and compared with PHB from a sugar hydrolysate and a commercial PHB powder. PHB from hardwood holocellulose hydrolysate was found to be comparable with commercial PHB in all properties. Differential scanning calorimetry and thermal gravimetric analysis showed that all samples had similar thermal behavior, where the melting temperature was 176 C and the decomposition temperature was 293 C. From the melting enthalpy, all samples showed 63% crystallinity. Dynamic mechanical analysis showed a glass transition temperature at 5 C and a crystallization temperature of 57 C. Fourier transform infrared spectroscopy and nuclear magnetic resonance confirmed that the samples were homopolymers comprised of hydroxybutyrate units. The difference among the samples was the number average molecular mass, being lower for wood hydrolysate (246.4 kDa) than sugar hydrolysate (670.3 kDa).

show abstract

“…The incorporation of lignocellulosic particles in composites can play the role of reinforcements by increasing mechanical properties, particularly the Young's modulus and strength, and/or play the role of fillers to reduce the overall cost and environmental impact, while providing new functionalities to the material. In the present work, (ligno-)cellulosic fillers were added to PHBV to address the second issue mentioned above [29][30][31]. Studies on the biodegradation of such PHBV-based biocomposites showed that lignocellulosic fibres did not compromise the biodegradation of PHBV polymer [15,32].…”

Section: Introductionmentioning

confidence: 92%

Physical-Chemical and Structural Stability of Poly(3HB-co-3HV)/(ligno-)cellulosic Fibre-Based Biocomposites over Successive Dishwashing Cycles

et al. 2022

View full text Add to dashboard Cite

In order to lengthen the life cycle of packaging materials, it is essential to study their potential for reuse. This has been never carried out for emerging bio-based and biodegradable materials such as PHBV/(ligno-)cellulosic fibre-based biocomposite materials. This work therefore highlights the impact of successive dishwashing cycles on the physical-chemical and structural stability of such materials. Several parameters were considered to assess this stability, such as the visual aspect and colour, the microstructure, the thermal and tensile properties, and the overall migration in food liquid simulants. The effect of fibre composition, morphology, and content was investigated by selecting three types of commercial (ligno-)cellulosic fibres and two filler contents (20 and 40 wt%). A great potential for reuse of PHBV films was highlighted by their high stability after up to at least 50 dishwashing cycles. However, the addition of (ligno-)cellulosic fillers negatively impacts the stability of PHBV-based materials, especially due to the hygroscopic behaviour of (ligno-)cellulosic fillers and the heterogenous microstructure of biocomposites, with at best up to 10 possible dishwashing cycles for ultra-pure cellulose. In conclusion, reuse including dishwashing steps can be considered for neat PHBV materials, while this should be prohibited for PHBV/(ligno-)cellulosic fibre-based biocomposite materials.

show abstract

Cellulose‐Reinforced Biocomposites Based onPHBandPHBVfor Food Packaging Applications

Cited by 8 publications

References 135 publications

Development and Characterization of Fully Renewable and Biodegradable Polyhydroxyalkanoate Blends with Improved Thermoformability

Development and Characterization of Fully Renewable and Biodegradable Polyhydroxyalkanoate Blends with Improved Thermoformability

In‐depth material characterization of polyhydroxybutyrate from a forest biorefinery

Physical-Chemical and Structural Stability of Poly(3HB-co-3HV)/(ligno-)cellulosic Fibre-Based Biocomposites over Successive Dishwashing Cycles

Contact Info

Product

Resources

About