Article
Polymer Science
Grigorios Raptopoulos, Ioannis Choinopoulos, Filippos Kontoes-Georgoudakis, Patrina Paraskevopoulou
Summary: The synthesis of PLA-grafted M-alginate aerogels was described in this study, with the use of multifunctional monomers. The g-M-alginate aerogels retained the fibrous morphology of their parent M-alginate aerogels and showed lightweight and high porosity properties.
Article
Polymer Science
Vladislav Istratov, Vitaliy Gomzyak, Valerii Vasnev, Oleg V. V. Baranov, Yaroslav Mezhuev, Inessa Gritskova
Summary: The synthesis and application of lactic acid-based polyesters for the creation of implants have gained increased interest due to their biocompatibility, biodegradability, and high mechanical strength. However, the hydrophobicity of polylactide limits its use in biomedical fields. This study focused on the synthesis of amphiphilic branched pegylated copolylactides to introduce hydrophilic groups and improve the properties of polylactide. The resulting copolylactides were used to prepare interpolymer mixtures with PLLA, leading to reduced brittleness, increased hydrophilicity, and water absorption. Furthermore, filling the polylactide films with hydroxyapatite further decreased the water contact angle and increased thermal stability.
Article
Polymer Science
Ye-xi Zhou, Qing-xia Yuan, Shu-ling Gong
Summary: The study focused on the effects of waterborne polyester, ammonium persulfate, poly(ethylene glycol) methyl ether methacrylate, methacrylic acid/acrylic acid monomer ratio, and butyl acrylate/styrene monomer ratio on the properties of the polyacrylate emulsion. The modified polyacrylate had a high average molecular weight, stable emulsion after 6 months, and films cured with melamine formaldehyde resin exhibited excellent water resistance, adhesion, and hardness.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Martin Danko, Katarina Mosnackova, Anna Vykydalova, Angela Kleinova, Andrea Puskarova, Domenico Pangallo, Marek Bujdos, Jaroslav Mosnacek
Summary: The recovery of keratin waste is an important research topic in many research groups, and incorporating keratin in plasticized PLA/PHB blends can improve thermal and mechanical properties while enhancing degradation under common environmental conditions, making it suitable for applications in agriculture and packaging.
Article
Acoustics
Zhiyu Li, Yimei Zheng, Qian Sun, Jianyi Wang, Baodong Zheng, Zebin Guo
Summary: The study demonstrated that ultrasound-assisted Maillard reaction can enhance the structural and emulsifying properties of myofibrillar protein and dextran conjugates, with the conjugates grafted with 70 kDa dextran showing the greatest improvements in emulsifying ability and stability.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Polymer Science
Xiaomei Liu, Sha Cheng, Junji Zhao, Xueyan Qiu, Wenxu Zhang, Guofu Ma, Ziqiang Lei
Summary: An emulsion of sesbania gum-g-poly (acrylic acid-co-vinyl acetate) was prepared and applied to prevent water leakage from soil. The emulsion showed good stability under optimal conditions, forming a consolidation layer in soil to reduce water penetration rate.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Kenta Hashimoto, Naruki Kurokawa, Atsushi Hotta
Summary: New biodegradable shape-memory polymers (SMPs) were synthesized by blending PLCL and sc-PLA, showing controllable switching temperatures and shape-recovery ratios. The SMPs can be used as biomaterials for medical devices.
Article
Chemistry, Physical
Janusz W. Sikora, Lukasz Majewski, Andrzej Puszka
Summary: This study tested four different plastics and found that biodegradable plastics have comparable or even better mechanical strength than petrochemical plastics, and the influence of screw rotational speed on mechanical characteristics, as well as the decrease in barrier properties with increased speed, was demonstrated. Additionally, it was indicated that biodegradable plastics may be competitive with conventional petrochemical materials in certain niche applications.
Article
Biochemistry & Molecular Biology
Xianwu Cao, Jingshu Huang, Yun He, Chunyan Hu, Qunchao Zhang, Xinmao Yin, Wei Wu, Robert K. Y. Li
Summary: This study functionalized biobased lignin with POSS to prepare PLA composite films with superior UV-shielding performance and transparency, providing a new pathway for the preparation of biodegradable and renewable UV-shielding materials.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Green & Sustainable Science & Technology
Krzysztof Moraczewski, Tomasz Karasiewicz, Bartlomiej Jagodzinski, Andrzej Trafarski, Alona Pawlowska, Magdalena Stepczynska, Piotr Rytlewski
Summary: The research demonstrates that coffee, cocoa, and cinnamon extracts have a better impact on multiple processing of polylactide compared to synthetic anti-aging compounds, enabling the materials to retain proper properties for everyday applications.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2021)
Article
Chemistry, Physical
Ivan Lednev, Evgeniia Salomatina, Svetlana Ilyina, Sergey Zaitsev, Roman Kovylin, Larisa Smirnova
Summary: Composite materials based on chitosan and polylactide with excellent mechanical properties and high biocompatibility have been synthesized, showing great potential for use in regenerative medicine.
Article
Biochemistry & Molecular Biology
Yunjing Chen, Lijing Han, Huiliang Zhang, Lisong Dong
Summary: This study successfully prepared highly toughened polylactide (PLA) nanocomposites with balanced stiffness and strength by modifying silica (SiO2) nanoparticles and conducting uniaxial pre-stretching. The pre-stretching process increased the elongation at break and strength while reducing the ductility gradually, indicating the effectiveness of uniaxial pre-stretching in strengthening and toughening PLA nanocomposites.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Food Science & Technology
Qingyuan Dai, Qingyuan Hong, Xiuling Zhu, Polyanna Silveira Hornung, Huiqin Wang, Wen Fang, Yuru Zhang, Trust Beta
Summary: A simple and low-cost Maillard reaction method was developed using ethanol-water pretreatment. The formation of WPI-dextran conjugates was confirmed and significant conformational changes were observed. The inhibitory effect of covalently conjugated dextran improved the stability of the conjugates at different pH values.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Yun-Bo Yu, Wu-Dan Cai, Zi-Wei Wang, Jing-Kun Yan
Summary: The study demonstrated that the ferulic acid-grafted curdlan conjugate as a stabilizer in the oil-in-water emulsion system showed excellent emulsifying properties, contributing to the improved chemical stability and bioavailability of beta-carotene.
Review
Chemistry, Multidisciplinary
Ruth D. Rittinghaus, Sonja Herres-Pawlis
Summary: Bioplastics, such as polylactide (PLA), offer a solution to environmental pollution and linear material flows as they can replace conventional plastics in various applications. The properties of PLA can be altered by introducing comonomers, including other lactones like epsilon-caprolactone (CL). However, controlling copolymerizations of lactide (LA) with other monomer classes remains challenging due to the complexity of the system. Catalysts play a crucial role in copolymerizations, determining the reaction kinetics and resulting microstructure. This review presents copolymerization catalysts for LA, categorized into catalysts for lactone block copolymers, lactone random copolymers, and multimechanistically synthesized copolymers.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
John Eymann, Lionel Joucla, Guy Jacob, Jean Raynaud, Chaza Darwich, Emmanuel Lacote
Summary: New energetic polymers based on polytetrazenes have direct incorporation of energetic groups in the polymer backbone, with decomposition temperature at around 130 degrees Celsius and glass transition temperatures ranging from -34.2 to 0.2 degrees Celsius, lowering to -61 degrees Celsius with a new diazidotetrazene plasticizer. Complete room-temperature depolymerization within 1 week is achieved using hexafluoroisopropanol (HFIP), enabling recycling of pyrotechnic compositions with these new binders.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Pharmacology & Pharmacy
Mohammad A. I. Al-Hatamleh, Ma'mon M. Hatmal, Walhan Alshaer, Engku Nur Syafirah E. A. Rahman, Manali Haniti Mohd-Zahid, Dina M. Alhaj-Qasem, Chan Yean Yean, Iskandar Z. Alias, Juhana Jaafar, Khalid Ferji, Jean-Luc Six, Vuk Uskokovic, Hiroshi Yabu, Rohimah Mohamud
Summary: This review discusses the recent advances in COVID-19 infection, focusing on nanomedicine applications that may help in the development of effective vaccines or therapeutics against COVID-19. The authors propose a novel perspective for the future, suggesting that the use of polymersome nano-objects can effectively suppress the cytokine storm and reduce the severity of COVID-19 infection.
EUROPEAN JOURNAL OF PHARMACOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Djallal Ikkene, Ana Andreea Arteni, Malika Ouldali, Gregory Francius, Annie Brulet, Jean-Luc Six, Khalid Ferji
Summary: In this study, pure vesicles were prepared in situ from a polysaccharide-grafted copolymer using polymerization-induced self-assembly technology. The vesicles were found to self-assemble over a wide range of solid concentrations, and an increase in the targeted average degree of polymerization led to an increase in vesicle membrane thickness.
Article
Chemistry, Multidisciplinary
Anton Ashuiev, Matthieu Humbert, Sebastien Norsic, Jan Blahut, David Gajan, Keith Searles, Daniel Klose, Anne Lesage, Guido Pintacuda, Jean Raynaud, Vincent Monteil, Christophe Coperet, Gunnar Jeschke
Summary: This study elucidates the atomic-scale structure of the dormant active sites in Ziegler-Natta catalysts through magnetic resonance experiments, providing important insights for future research. The spectroscopic signatures are directly linked to the polymerization activity of the catalysts, offering a potential mechanism for ethylene polymerization based on DFT computations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Ali Khalil, Christine Gerardin-Charbonnier, Hubert Chapuis, Khalid Ferji, Jean-Luc Six
Summary: This study presents a multistep synthesis of novel (meth)acrylate monomers based on gallic acid (GA) and the production of bio-based polymers with antioxidant properties. Through photo-mediated RAFT polymerization with evaluation of two trithiocarbonate-type chain transfer agents (CTAs), protected GA-based polymers were synthesized and deprotected to yield polymeric chains with free gallic acid moiety for antioxidant activity. The research demonstrates the potential of these free GA-based polymers through DPPH free radical scavenging and inhibition of methyl linoleate oxidation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Polymer Science
Valeria Lizeth Romero Castro, Brahim Nomeir, Ana Andreea Arteni, Malika Ouldali, Jean-Luc Six, Khalid Ferji
Summary: This study presents an in situ formulation of surfactant-free latex using dextran-based amphiphilic copolymers, prepared through a water-based photo-initiated reversible addition fragmentation chain transfer polymerization induced self-assembly strategy. The resulting latex nanoparticles exhibit spherical morphology, with size ranging from 20 nm to 240 nm depending on the length of PHPMA block.
Article
Chemistry, Applied
Valentin Maingret, Coraline Chartier, Jean-Luc Six, Veronique Schmitt, Valerie Heroguez
Summary: In this study, Pickering emulsions of dodecane and medium chain triglyceride (MCT) oils were stabilized by alkylated-dextran nanoparticles. The nanoparticles showed excellent stability and could be hydrolyzed in the presence of dextranase, allowing on-demand destabilization of the emulsions. The study also demonstrated the co-encapsulation of fluorescent probes and an antimalarial drug in the stabilizing particles.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Priscilla Arnould, Frederic Simon, Stephane Fouquay, Francis Pardal, Guillaume Michaud, David Gajan, Jean Raynaud, Vincent Monteil
Summary: In this study, polyurethane (PU) materials were synthesized and the influence of metallic and organic catalysts on the kinetics, structure, and properties of the materials were investigated. The researchers found that tin (Sn)-free and even metal-free catalysts can be viable alternatives to the standard Sn catalyst, and the choice of catalyst can be used to adjust the structure and reaction time of the prepolymers.
Article
Polymer Science
Djallal Ikkene, Ana Andreea Arteni, Claire Boulogne, Jean-Luc Six, Khalid Ferji
Summary: The morphological evolution of graft copolymer-based nano-objects was monitored during their formulation in water by light scattering and electron microscopy. Unilamellar vesicles (ULVs) and large compound nano-objects (LCNs) were formed, and an unprecedented multicompartment vesicle (MCV) intermediate morphology was discovered, which was attributed to local phase separation between dextran and 2-hydroxypropyl methacrylate.
Review
Biochemistry & Molecular Biology
Mohammad A. Al-Hatamleh, Walhan Alshaer, Ma'mon M. Hatmal, Lidawani Lambuk, Naveed Ahmed, Mohd Zulkifli Mustafa, Siew Chun Low, Juhana Jaafar, Khalid Ferji, Jean-Luc Six, Vuk Uskokovic, Rohimah Mohamud
Summary: Bee products have been used as natural remedies for diseases, and nanotechnology can enhance their therapeutic effects. Alginate, a naturally derived polymer, is an ideal carrier for nanomaterials, and can enhance the therapeutic effects of bee products, especially for wound healing and skin tissue engineering. However, there is a lack of research on alginate-based nanomaterials loaded with bee products.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Louis Le Moigne, Tommaso Posenato, David Gajan, Jennifer Lesage de la Haye, Jean Raynaud, Emmanuel Lacote
Summary: Amine-borane dimers and oligomers were synthesized via capping agent-controlled polycondensation, and they exhibited excellent catalytic performance in transfer hydrogenation reactions. The oligomers with amine-borane Lewis pairs and congested bis(amine-borane) showed the highest yields. Solid-state NMR characterization revealed that the boron-containing materials obtained from transfer dehydrogenation were similar to those obtained from thermal dehydrogenation.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Bruno Guerdener, Virgile Ayzac, Sebastien Norsic, Paul Besognet, Veronique Bounor-Legare, Vincent Monteil, Veronique Dufaud, Jean Raynaud, Yvan Chalamet
Summary: Using carbon dioxide as a reagent and quaternary ammonium salts as organocatalysts, the carbonatation of semi-crystalline [ethylene-glycidyl methacrylate]-based polymers was achieved. The influence of ammonium salt composition and reaction conditions on the conversion of epoxides into cyclic carbonates was studied. The reaction was also transposed to reactive extrusion under CO2, leading to high yields of cyclic carbonate.
Article
Chemistry, Multidisciplinary
Nam Duc Vu, Aurelie Boulegue-Mondiere, Nicolas Durand, Jean Raynaud, Vincent Monteil
Summary: Silicones are widely used materials due to their excellent stability and low toxicity. Recycling them is important for circular economy, and we have developed an efficient method for the depolymerization of linear polydimethylsiloxanes using a catalyst. This method allows for the chemical recycling of silicones into cyclic monomers with high yields, and the catalyst can be used multiple times without loss of activity.
Article
Chemistry, Physical
Magali Puillet, James Delorme, Delphine Crozet, Matthieu Humbert, David Gajan, Magali Bousquie, Delphine Blanc, Jean Raynaud, Vincent Monteil
Summary: Commercially available Ni(ii) and Co(ii) complexes act as catalysts for alkene/vinylsilane dehydrogenative silylation and hydrosilylation without external reducing agents. Ni is selective for DS products, while Co yields both HS and DS products, and all complexes efficiently induce silicone-oil crosslinking under a non-inert atmosphere.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Meriem El Founi, Hamed Laroui, Brandon S. B. Canup, Joseph S. Ametepe, Regis Vanderesse, Samir Acherar, Jerome Babin, Khalid Ferji, Isabelle Chevalot, Jean-Luc Six
Summary: The study successfully prepared DOX-loaded NPs and optimized drug loading of DOX. The kinetics of DOX release showed that it can be released by simple diffusion or light irradiation of the NPs. Moreover, the phototriggered DOX release had an impact on cell viability, depending on the cell lines tested.
ACS APPLIED BIO MATERIALS
(2021)