Extrusion of wood fibre reinforced poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) biocomposites: Statistical analysis of the effect of processing conditions on mechanical performance

Vandi, Luigi‐Jules; Chan, Clement Matthew; Werker, Alan; Richardson, Des; Laycock, Bronwyn; Pratt, Steven

doi:10.1016/j.polymdegradstab.2018.10.015

Cited by 36 publications

(16 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our findings of higher TS of PHBHHx samples at lower processing temperature P are not in total agreement with the results on PHBV processing of Vandi et al [47]. In contrast to our results, they observed a lower TS of PHBV using a combination of low processing temperature P and low screw speed S and attributed this to an incomplete melt consolidation of the material.…”

Section: Effect Of Processing Parameters On Ts ε and Econtrasting

confidence: 93%

Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure

et al. 2021

View full text Add to dashboard Cite

Biobased and biodegradable polyhydroxyalkanoates (PHAs) have great potential as sustainable packaging materials. However, improvements in their processing and mechanical properties are necessary. In this work, the influence of melt processing conditions on the mechanical properties and microstructure of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) is examined using a full factorial design of experiments (DoE) approach. We have found that strict control over processing temperature, mold temperature, screw speed, and cooling time leads to highly increased elongation at break values, mainly under influence of higher mold temperatures at 80 °C. Increased elongation of the moldings is attributed to relaxation and decreased orientation of the polymer chains together with a homogeneous microstructure at slower cooling rates. Based on the statistically substantiated models to determine the optimal processing conditions and their effects on microstructure variation and mechanical properties of PHBHHx samples, we conclude that optimizing the processing of this biopolymer can improve the applicability of the material and extend its scope in the realm of flexible packaging applications.

show abstract

Section: Effect Of Processing Parameters On Ts ε and Econtrasting

confidence: 93%

Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Indeed, it can be noticed that T10, T50 and Tmdr shift to lower temperatures, being however more pronounced for the biocomposite filled with alkaline treated fibers. The decrease in thermal stability of the biocomposites may be attributed to the moisture contained in the materials [39]; this obviously has a significant impact on the ongoing processes of polymer chain-structure degradation. Moreover, both biocomposites treated with organo-silanes and those treated with combined alkaline/organo-silanes are more stable than those filled with untreated AVF.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Effects of various surface treatments on Aloe Vera fibers used as reinforcement in poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) biocomposites

Dehouche

Idres

Kaci

et al. 2020

Polymer Degradation and Stability

View full text Add to dashboard Cite

“…As to tensile properties, the data reported in Table 5 and depicted in Figure 14 show that Young’s modulus (E) is rather constant until 20 wt % of filler loading then tends to slightly increase with the increment of sweet potato residue. This behaviour is quite common [ 21 , 30 , 69 , 70 ] and can be ascribed to a weak interphase adhesion. At the same time, the tensile strength (σ) and the elongation at break (ε) decrease, confirming a poor impregnation between the additive and the matrix, as already demonstrated by the previous analyses.…”

Section: Resultsmentioning

confidence: 99%

Integrated Efforts for the Valorization of Sweet Potato By-Products within a Circular Economy Concept: Biocomposites for Packaging Applications Close the Loop

et al. 2021

View full text Add to dashboard Cite

With the aim to fully exploit the by-products obtained after the industrial extraction of starch from sweet potatoes, a cascading approach was developed to extract high-value molecules, such as proteins and pectins, and to valorize the solid fraction, rich in starch and fibrous components. This fraction was used to prepare new biocomposites designed for food packaging applications. The sweet potato residue was added to poly(3-hydroxybutyrate-co-3-hydroxyvalerate) in various amounts up to 40 wt % by melt mixing, without any previous treatment. The composites are semicrystalline materials, characterized by thermal stability up to 260 °C. For the composites containing up to 10 wt % of residue, the tensile strength remains over 30 MPa and the strain stays over 3.2%. A homogeneous dispersion of the sweet potato waste into the bio-polymeric matrix was achieved but, despite the presence of hydrogen bond interactions between the components, a poor interfacial adhesion was detected. Considering the significant percentage of sweet potato waste used, the biocomposites obtained show a low economic and environmental impact, resulting in an interesting bio-alternative to the materials commonly used in the packaging industry. Thus, according to the principles of a circular economy, the preparation of the biocomposites closes the loop of the complete valorization of sweet potato products and by-products.

show abstract

Extrusion of wood fibre reinforced poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) biocomposites: Statistical analysis of the effect of processing conditions on mechanical performance

Abstract: Extrusion of wood fibre reinforced Poly(hydroxybutyrate-cohydroxyvalerate) (PHBV) biocomposites: statistical analysis of the effect of processing conditions on mechanical performance

Cited by 36 publications

References 29 publications

Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure

Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure

Effects of various surface treatments on Aloe Vera fibers used as reinforcement in poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) biocomposites

Integrated Efforts for the Valorization of Sweet Potato By-Products within a Circular Economy Concept: Biocomposites for Packaging Applications Close the Loop

Contact Info

Product

Resources

About