Article
Chemistry, Physical
Nawel Mokrane, Mustapha Kaci, Jose-Marie Lopez-Cuesta, Nadjet Dehouche
Summary: This study investigates the effect of adding HNTs and PLA-g-MA on the morphology and properties of PLA/PHBHHx blends. The results show that HNTs are preferentially localized in PHBHHx nodules and combining HNTs with PLA-g-MA results in a finer and more homogeneous morphology. Adding HNTs significantly improves the impact strength, while adding PLA-g-MA also significantly enhances the tensile strength, elongation at break, and impact strength. Furthermore, the compatibilized blend reinforced with HNTs exhibits improved thermal stability.
Article
Polymer Science
Anna Kowalewska, Agata S. Herc, Joanna Bojda, Maria Nowacka, Mariia Svyntkivska, Ewa Piorkowska, Witold Kaczorowski, Witold Szymanski
Summary: In this study, ternary blends of polylactide (PLA) and poly(methyl methacrylate) (PMMA) with functionalized polysilsesquioxanes (LPSQ-R) were investigated for their effects on the structure and properties of the blends using various analytical techniques. The results clearly showed that the LPSQ-R modulated the structure and properties of the blends, demonstrating a potential for tailored modification of PLA/PMMA blends.
Article
Biochemistry & Molecular Biology
Raasti Naseem, Giorgia Montalbano, Matthew J. German, Ana M. Ferreira, Piergiorgio Gentile, Kenneth Dalgarno
Summary: This paper explores the thermal, mechanical, and processing properties of ternary blends of PCL, PHBV, and PLLA for orthopaedic applications. The study demonstrates that blending PCL and PHBV with PLLA can improve the modulus, strength, and elongation at break of the materials, with PHBV having the greatest impact on the modulus and strength, and PCL affecting creep behavior and viscosity.
Article
Polymer Science
Hedayatollah Sadegh Ghari, Hossein Nazockdast
Summary: The toughening efficiency of differently plasticized thermoplastic starches in PLA/TPS blend was studied. The addition of citric acid as a co-agent significantly reduced the viscosity and melt elasticity of TPS, leading to smaller particle size and enhanced toughness. The addition of dynamically cross-linked EVA in PLA/TPS ternary blends resulted in a special matrix-disperse morphology, enabling the blends to exhibit remarkably higher toughness.
Article
Polymer Science
Monica Elvira Mendoza-Duarte, Ivan Alziri Estrada-Moreno, Perla Elvia Garcia-Casillas, Alejandro Vega-Rios
Summary: This study developed polymer blends based on poly(lactic acid), stiff polymer, and elongated polymer, with an emphasis on mechanical property balance. By utilizing dynamic mechanical analysis and statistical software, binary and ternary blends were studied to determine their performance, with EPS 3 showing superior properties.
Article
Chemistry, Multidisciplinary
Christian Bruetting, Julia Dreier, Christian Bonten, Volker Altstaedt, Holger Ruckdaeschel
Summary: Blending polylactic acid (PLA) with poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a practical approach to enhance the foaming behavior of PLA. PHBV is biodegradable, nontoxic, biocompatible, and naturally produced by bacteria. This study investigates the impact of PLA/PHBV blends on sorption behavior, crystallization behavior, dynamic mechanical properties, and autoclave foaming. Results show that PHBV and PLA are immiscible, and the foaming behavior of PLA is correlated with PHBV content, with increased foam density, smaller cell size, and higher foam cell nucleation rate observed as PHBV content increases. The study demonstrates that PHBV can improve the foam morphology of PLA-based foams.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Polymer Science
D. D. Wu, Y. Guo, A. P. Huang, R. W. Xu, P. Liu
Summary: The study demonstrated that different types of Joncryl epoxides have varying effects on the properties of PBAT/PLA blends, with ADR4368 showing the best modification effect. Enhancements in mechanical properties and compatibility were observed with the presence of ADR4368.
Article
Polymer Science
Jiaying Gong, Zhe Qiang, Jie Ren
Summary: A one-step reactive extrusion process has been demonstrated to toughen the PLA blend without sacrificing its mechanical strength and degradability. The optimized condition led to an improved elongation at break of 15.95%, which is 3.1 times of the PLA and 1.5 times of the PLA/PHBV blend without the initiator.
Article
Polymer Science
Hosein Pouriman, Kevin Graham, Krishnan Jayaraman
Summary: This study selected four formulations with different components and made them into monolayer thin films. The mechanical, barrier, and aesthetic properties of the films were measured. The results are important for developing biodegradable packaging to extend the shelf life of oxygen and moisture-sensitive food products, as the produced films showed improved oxygen and moisture barrier properties compared to neat PLA, although still higher than neat PHBV.
EXPRESS POLYMER LETTERS
(2023)
Article
Polymer Science
Zeinab Mousavi, Marie-Claude Heuzey, Pierre J. Carreau
Summary: The effect of adding multiwall carbon nanotubes (CNTs) on the morphology and properties of compatibilized PLA/PA11 blends was evaluated. Pre-mixing CNTs with PLA led to the formation of a network-like structure with non-spherical, non-coalescing PA11 domains bridged by CNTs. The nanocomposites showed a transition from liquid-to-solid behavior with increasing CNT concentration, but the electrical conductivity remained in the insulating range due to inadequate interconnectivity of PA11-CNT domains.
Article
Polymer Science
Karabo Innocent Matumba, Mpho Phillip Motloung, Vincent Ojijo, Suprakas Sinha Ray, Emmanuel Rotimi Sadiku
Summary: This study investigated the effect of Joncryl concentration on the properties of PLA/PCL and PLA/PEG blends. The addition of Joncryl influenced the properties of both blends, with reduced droplet size and improved compatibility observed in PLA/PCL blends, and the presence of a co-continuous morphology in PLA/PEG blends at certain Joncryl loadings. Joncryl addition also decreased the crystallinity of PCL and PEG in the blends. The thermal stabilities and mechanical properties of the blends were shown to be dependent on the Joncryl concentration.
Article
Food Science & Technology
Eva Hernandez Garcia, Maria Vargas, Amparo Chiralt
Summary: Phenolic acids can increase the glass transition temperature of polylactic acid, while poly(3-hydroxybutyrate-co-3-hydroxyvalerate) undergoes supercooling in films containing protocatechuic acid. Polymer matrices with phenolic acids are stiffer and more resistant to break than polyester blends, and they also have improved oxygen and water vapor barrier capacity, especially in films containing protocatechuic acid. The release rate and ratio of phenolic acids increase with decreased polarity of the food simulant.
FOOD PACKAGING AND SHELF LIFE
(2022)
Article
Polymer Science
Adrian Korycki, Christian Garnier, Amandine Abadie, Valerie Nassiet, Charles Tarek Sultan, France Chabert
Summary: The study elaborated PEEK/PES blends with partial miscibility by melt mixing with phenolphthalein, which was confirmed by DSC and DMTA analysis. Phenolphthalein acted as a compatibilizer and plasticizer for the blends, resulting in a softened PEEK phase and improved interfacial adhesion with PES. Additionally, the storage modulus in the glassy region of the blends remained similar to pure PEEK due to the aromatic moieties in phenolphthalein.
Article
Engineering, Environmental
Giulia Infurna, Luigi Botta, Irene Ingargiola, Marco Maniscalco, Giuseppe Caputo, Nadka Tz. Dintcheva
Summary: This study investigates the effect of biochar as a filler for biopolymer blends and highlights its importance. The results show that biochar has different effects on different biopolymers, and the weight ratio of the polymers in the blend also plays an important role. Additionally, a strong chemical interaction is found between biochar and polylactic acid, while no interaction is observed between biochar and poly-butylene adipate-co-terephthalate.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Polymer Science
Kartik Behera, Yen-Hsiang Chang, Chang-Yu Liu, Fang-Chyou Chiu
Summary: This study investigated the effect of incorporating PMMA as a compatibilizer in PVDF/PLA blends. The results showed that adding PMMA improved the interaction between PVDF and PLA, resulting in a change in phase morphology and an increase in ductility. PMMA showed higher affinity to PVDF than to PLA.
Article
Materials Science, Composites
Kahina Iggui, Mustapha Kaci, Nicolas Le Moigne, Anne Bergeret
Summary: The study investigated the hygrothermal aging of neat PHBV and PHBV/C30B at high temperature and humidity conditions. Results showed that PHBV bionanocomposite exhibited better resistance towards hygrothermal aging, but suffered from reduced crystallinity, melting temperature, thermal stability, and altered mechanical and viscoelastic properties under such conditions.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Alessia Melelli, Delphin Pantaloni, Eric Balnois, Olivier Arnould, Frederic Jamme, Christophe Baley, Johnny Beaugrand, Darshil U. Shah, Alain Bourmaud
Summary: PLA-flax non-woven composites show preferential degradation of flax fibres from the edge to the core during garden composting, while erosion of cell walls occurs within the fibres themselves from the central lumen to the periphery primary wall. The ageing process results in a decrease in indentation modulus for fibres in the preserved core of the composite and a change in PLA morphology towards the edge of the sample.
Article
Materials Science, Multidisciplinary
Maxime Gautreau, Antoine Kervoelen, Guillaume Barteau, Francois Delattre, Thibaut Colinart, Floran Pierre, Maxime Hauguel, Nicolas Le Moigne, Fabienne Guillon, Alain Bourmaud, Johnny Beaugrand
Summary: Physical pre-treatments such as ultrasound and gamma irradiation were used in this study to increase the number of elementary fibers and improve the mechanical properties of non-woven composites made from flax tows. The use of bio-based matrix PLA further enhanced the properties of the composites. Environmental analysis demonstrated that gamma irradiation had a greater environmental benefit compared to ultrasound pre-treatment.
Article
Polymer Science
Benjamin Le Delliou, Olivier Vitrac, Mickael Castro, Stephane Bruzaud, Sandra Domenek
Summary: Melt blending of PHBV and PBSA was investigated, and it was found that they were immiscible. The crystallization rate of both materials increased in the blends, and the rigidity could be modulated by adding PBSA, while the elongation at break was governed by PHBV.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Chloe Volant, Eric Balnois, Guillaume Vignaud, Anthony Magueresse, Stephane Bruzaud
Summary: Polyhydroxyalkanoate microbeads with different diameters and surface roughness were successfully prepared using an emulsification-evaporation process. The mechanical properties of these microbeads are closely related to their crystalline content, while their degradation behavior under marine environment shows rapid degradation similar to cellulose.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Proceedings Paper
Polymer Science
Ismail Berrabah, Nadjet Dehouche, Mustapha Kaci, Stephane Bruzaud, Charles Henry Deguines, Christelle Delaite
Summary: The tensile and viscoelastic properties of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) are improved by adding zinc oxide nanoparticles, with the degree of improvement depending on the content of zinc oxide nanoparticles. However, at 3 wt%, the flexibility and toughness of the material decrease.
MACROMOLECULAR SYMPOSIA
(2022)
Proceedings Paper
Polymer Science
Nadjet Dehouche, Mustapha Kaci, Walter Wilhelm Focke, Liezel Van Der Merwe
Summary: The effect of various clays nanofillers on the photo-oxidation of polyamide 11 (PA11) was investigated. It was found that the nanocomposite samples exhibited faster oxidation kinetics compared to pure PA11, although this effect was less pronounced when sepiolite filler was used.
MACROMOLECULAR SYMPOSIA
(2022)
Proceedings Paper
Polymer Science
Celia Idres, Nadjet Dehouche, Mustapha Kaci, Carole Laine, Stephane Bruzaud
Summary: The development of new bio-based and biodegradable composites with enhanced performances is a efficient route to achieve a sustainable materials production. Biocomposite materials based on PHBHHx reinforced with Agave leaves fibers (ALF) were prepared by melt compounding at various filler content ratios, and the effect of ALF content on the material properties was evaluated based on thermal stability, tensile, and surface properties. The results show that the addition of ALF leads to reinforcement effect on PHBHHx, which is more pronounced at 30 wt%.
MACROMOLECULAR SYMPOSIA
(2022)
Proceedings Paper
Polymer Science
Leila Hassaini, Mustapha Kaci, Nadjet Dehouche, Stephane Bruzaud
Summary: The objective of this work is to investigate the effect of using olive husk flour (OHF) as a biofiller on the marine degradation of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) biocomposites. The results show that the presence of OHF promotes the hydrolytic degradation of PHBV, especially at 40 degrees C. Additionally, the degraded samples exhibit eroded and cracked surfaces.
MACROMOLECULAR SYMPOSIA
(2022)
Article
Chemistry, Physical
Nedjma Tazibt, Mustapha Kaci, Nadjet Dehouche, Mohamed Ragoubi, Leonard Ionut Atanase
Summary: The effect of hydroxyapatite (HAp) synthesized by the chemical precipitation process on the morphology and properties of poly(lactic acid) (PLA)-based composites was investigated. It was found that the addition of 5 wt% HAp led to a slight improvement in the thermal stability and tensile properties of the composite material compared to neat PLA and other composite samples. The study also highlighted the potential use of HAp as a reinforcement in PLA composite materials.
Article
Polymer Science
Alain Bourmaud, Kolja Konschak, Coralie Buffet, Meline Calatraba, Anton Loic Rudolph, Antoine Kervoelen, Basile Gautherot, Estelle Bonnin, Johnny Beaugrand
Summary: This study focuses on the use of tomato by-product biomass from industrial plants as reinforcement for new degradable and biobased thermoplastic materials. The results show that the tomato by-product-reinforced materials have mechanical performance comparable to existing formulations. Depending on the targeted application, a wide range of biobased and/or degradable products can be designed.
Article
Polymer Science
Emmanuelle Richely, Johnny Beaugrand, Michel Coret, Christophe Binetruy, Pierre Ouagne, Alain Bourmaud, Sofiane Guessasma
Summary: This study aims to understand the damage and fracture kinetics in flax fibre elements at both the unitary and bundle scales. It uses an experimental setup allowing for optical observation during tensile loading, capturing crack initiation, propagation, and damage mechanisms. The study shows different failure scenarios depending on the nature of the fibre element, highlighting the importance of the structural scale. The findings can contribute to the eco-design of flax-based composites for a variety of applications.
Article
Multidisciplinary Sciences
G. Caneva, A. Bourmaud, A. Bellini, A. Melelli
Summary: This paper proposes an interpretation for the plant represented in the iconic painting in Pompeii called "Flora in Ariadne's house", suggesting it is flax. Flax was economically and culturally important and symbolized fertility and the afterlife, associated with the feminine sphere. This interpretation strengthens the proposed identification of the girl in yellow as Persephone, a wife transitioning to the afterlife.
RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI
(2023)
Article
Engineering, Environmental
Gabrielle Derippe, Lena Philip, Pierre Lemechko, Boris Eyheraguibel, Anne-Leila Meistertzheim, Mireille Pujo-Pay, Pascal Conan, Valerie Barbe, Stephane Bruzaud, Jean-Francois Ghiglione
Summary: The study evaluates the impact of physical, chemical, and biological factors on the biodegradability of tailor-made PHAs in the marine environment. The chemical structure of the polymer and the specificity of the biofilm growing on plastic films were found to be the main drivers of PHA biodegradation.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Emmanuelle Richely, Sylvie Durand, Alessia Melelli, Alexander Kao, Anthony Magueresse, Hom Dhakal, Tatyana Gorshkova, Franck Callebert, Alain Bourmaud, Johnny Beaugrand, Sofiane Guessasma
Summary: This study investigates the shape and variations of flax fiber lumen using a combination of characterization techniques, highlighting the difficulty of defining a single geometric reference for the lumen. The intricate lumen shape may originate from factors such as cell wall thickening, cell death, and post mortem processing. Observations following tensile testing reveal the combined effect of geometrical inhomogeneities and intricate lumen porosity in driving fiber failure.
