Article
Polymer Science
Hans R. Kricheldorf, Steffen M. Weidner
Summary: The research showed that 2,2'-dihydroxybiphenyl is the most successful cocatalyst for bismuth subsalicylate in ring-opening polymerization of l-lactide, and optimization of reaction time and temperature is crucial for achieving high weight average molecular weights. Additionally, some unusual transesterification reactions were discovered, and triphenylphosphine was found to be an effective catalyst poison.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Alfredo Martinez-Cutillas, Salvador Leon, Sejin Oh, Antxon Martinez de Ilarduya
Summary: The use of renewable monomers to produce new polyesters through enzymatic ring opening polymerization is gaining attention as a green alternative to petrochemical-based polyesters. In this study, three different macrolactones were polymerized using immobilized Candida antarctica lipase B, and for the first time, the resulting polymacrolactones were enzymatically depolymerized in solution. The depolymerization products were mainly cyclic monomers and dimers, with a small amount of macrocyclic oligoesters. The depolymerization reactions followed a Michaelis-Menten kinetic model and the macrocyclic oligoesters were successfully repolymerized, offering a pathway for chemical recycling of these interesting polymeric materials.
Article
Materials Science, Multidisciplinary
Jair A. Esquivel Guzman, Hu Zhang, Ernesto Rivera, Marc Lavertu, Xiao-Xia Zhu
Summary: Porphyrins and their derivatives exhibit useful properties in catalysis, photovoltaics, and biomedicine. By synthesizing porphyrin-containing polymers, the applications of porphyrins can be expanded. An enzymatic two-step method involving ring-closure and ring-opening reactions was used to successfully synthesize polyesters with porphyrin moieties, demonstrating good thermal stability and optical properties similar to their precursor porphyrins.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
E. Costa, M. F. Almeida, C. Alvim-Ferraz, J. M. Dias
Summary: Crambe abyssinica oil can be used as an alternative feedstock for biodiesel production, and high FAME yield can be obtained through enzymatic transesterification. The methanol:oil molar ratio and enzyme concentration significantly influence the reaction.
Article
Chemistry, Multidisciplinary
David S. Freitas, Vania Quesado, Diana Rocha, Jennifer Noro, Madalena Martins, Artur Cavaco-Paulo, Carla Silva
Summary: In this study, the enzymatic synthesis was employed as a sustainable approach for producing polyesters, aiming to reduce toxicity and operational costs. The use of NADES as a source of monomers for polymerization reactions catalyzed by lipase was detailed. The high conversion rates (above 70%) and simplicity of production, along with the non-toxicity and low cost of NADES, make them a greener and cleaner option for synthesizing high value-added products.
Article
Chemistry, Multidisciplinary
David S. Freitas, Vania Quesado, Diana Rocha, Jennifer Noro, Madalena Martins, Artur Cavaco-Paulo, Carla Silva
Summary: This study presents a detailed investigation on the feasibility of synthesizing polyesters through lipase-catalyzed esterification using Natural Deep Eutectic Solvents (NADES) as the source of monomers in an anhydrous medium. Three different NADES composed of glycerol and an organic base or acid were used for the synthesis of polyesters, and high conversion rates (above 70%) and at least 20 monomeric units (glycerol:organic acid/base 1:1) were achieved according to matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) analysis.
Article
Chemistry, Physical
Valerio Ferrario, Anamaria Todea, Lisa Wolansky, Nicola Piovesan, Alice Guarneri, Doris Ribitsch, Georg M. Guebitz, Lucia Gardossi, Alessandro Pellis
Summary: This study successfully synthesized aliphatic oligoesters with different molecular weights and conversion rates using immobilized biocatalysts in solvent-free systems. In order to improve the reaction efficiency, two different binding modules were fused on the surface of the biocatalyst, and the fusion enzymes were immobilized on epoxy-activated beads.
Article
Polymer Science
Antonella Rosato, Angela Romano, Grazia Totaro, Annamaria Celli, Fabio Fava, Giulio Zanaroli, Laura Sisti
Summary: This study investigated the degradation ability of commercial hydrolytic enzymes belonging to different subclasses on different aliphatic polyesters. The results showed that PCL and PBSA were the most biodegradable polyesters under the conditions used in this study, while PLA and PPC were not completely degraded. Chemical analysis confirmed that the enzymatic degradation occurred homogeneously from the surface without significantly affecting the macromolecular structure and thermal stability.
Article
Materials Science, Multidisciplinary
Kifah Nasr, Audrey Favrelle-Huret, Rosica Mincheva, Gregory Stoclet, Marc Bria, Jean-Marie Raquez, Philippe Zinck
Summary: This study successfully synthesized several DEFDC biobased semiaromatic copolyesters with variable interesting properties and demonstrated their potential applications in food packaging and other fields.
ACS APPLIED POLYMER MATERIALS
(2022)
Review
Polymer Science
Hong Wang, Hongpeng Li, Chee Keong Lee, Noreen Suliani Mat Nanyan, Guan Seng Tay
Summary: This article presents the reaction modes of enzyme-catalyzed polyester synthesis and the mechanism of lipase-catalyzed polymerization. It also discusses the advantages and disadvantages of enzyme-catalyzed polyester synthesis under different solvent systems. Furthermore, it examines the challenges for further industrialization of this method.
Article
Chemistry, Applied
Kamal Aly, Hany M. Abd El-Lateef, Nasr Yehia, A. Khodairy, Marwa M. Sayed, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: A novel series of unsaturated polyesters containing indazole moiety were successfully prepared using interfacial polycondensation technique, showing high thermal stability and different morphology structure. These polyesters demonstrated strong corrosion protection performance on X65-steel in sulfuric acid solution, acting as efficient inhibitors of mixed type corrosion.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Environmental Sciences
Darshana T. Bhatti, Sachin P. Parikh, Manan Shah
Summary: This research compared the performance of Ag-Fe co-doped TiO2 nanophotocatalyst in degrading diflouro triazole acetophenone under solar and UV radiations. The study found that Ag-Fe CT 30 photocatalyst showed the highest COD removal efficiency and could be reused effectively. The optimal conditions for DTA removal were determined to be pH 5, photocatalyst dose of 3 g/L, and Ti to Ag mole ratio of 30.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Polymer Science
Yongjia Lou, Jialin Xu, Luyan Xu, Zhuo Chen, Bo-Lin Lin
Summary: Combining the high molecular weight and property tunability of chemically recyclable CO2-based solid polyesters is an important strategy to achieve carbon neutral production of new polymers and alleviate plastic pollution.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Biotechnology & Applied Microbiology
Chan-Su Rha, Cheon-Seok Park, Dae-Ok Kim
Summary: The study predicted the impact of three variables on the yield of specific glycosyl flavonoids, finding that acidity and sucrose concentration had significant effects on product yield. By modulating reaction conditions, digestive stable IQ-G(ap) could be effectively synthesized, providing a new perspective on exploring the nutritional potential of flavonoid glycosides.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Victor Hevilla, Agueda Sonseca, Coro Echeverria, Alexandra Munoz-Bonilla, Marta Fernandez-Garcia
Summary: This article reviews the most important advances in the enzymatic synthesis of polyesters, including different processes, key parameters, latest research, and bioapplications, aiming to highlight the advantages and disadvantages of enzymatic polymerization for obtaining polymers.
MACROMOLECULAR BIOSCIENCE
(2021)
Article
Chemistry, Physical
Zhibin Wen, Leila Bonnaud, Rosica Mincheva, Philippe Dubois, Jean-Marie Raquez
Summary: This study details the scalable and solventless synthesis of a potential fully biobased resin derived from tyrosol and furfurylamine, showing promising thermal and mechanical properties, making it a candidate material for coating applications.
Article
Chemistry, Applied
Julie Meimoun, Vincent Wiatz, Rene Saint-Loup, Julien Parcq, Adelina David, Gregory Stoclet, Valerie Gaucher, Audrey Favrelle-Huret, Fanny Bonnet, Philippe Zinck
Summary: A new method for dual functionalization of starch via a one pot one step reaction in aqueous medium achieved grafting of poly(butyl acrylate) or poly(butyl acrylate-co-styrene) onto starch, resulting in copolymers with excellent mechanical properties and dual glass transition temperatures.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Julie Meimoun, Choltirosn Sutapin, Gregory Stoclet, Audrey Favrelle, Pascal Roussel, Marc Bria, Suwabun Chirachanchai, Fanny Bonnet, Philippe Zinck
Summary: The chain shuttling ring-opening copolymerization of L-lactide with epsilon-caprolactone using two aluminum catalysts and benzyl alcohol as a chain transfer agent has been successfully achieved. A newly synthesized aminobisphenolate supported aluminum complex affords lactone rich poly(L-lactide-co-lactone) statistical copolymeric blocks, while Al(OiPr)(3) produces semicrystalline poly(L-lactide) rich blocks. The crystalline ratios and glass transition temperatures of these new classes of polylactide based block copolymers can be tuned by adjusting the catalysts and the comonomers ratio.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Julie Meimoun, Yupin Phuphuak, Remi Miyamachi, Yong Miao, Marc Bria, Cyril Rousseau, Guilherme Nogueira, Andreia Valente, Audrey Favrelle-Huret, Philippe Zinck
Summary: Cyclodextrins (CDs) are cyclic oligosaccharides widely used in various fields. This study successfully achieved quantitative functionalization of various types of CDs using 4-dimethylaminopyridine (DMAP) as a catalyst. The inclusion complex formed between DMAP and β-CD was characterized for the first time, and its association constant was estimated.
Article
Materials Science, Multidisciplinary
Kifah Nasr, Audrey Favrelle-Huret, Rosica Mincheva, Gregory Stoclet, Marc Bria, Jean-Marie Raquez, Philippe Zinck
Summary: This study successfully synthesized several DEFDC biobased semiaromatic copolyesters with variable interesting properties and demonstrated their potential applications in food packaging and other fields.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Alma Lucia Villela Zumaya, Rosica Mincheva, Jean-Marie Raquez, Fatima Hassouna
Summary: This review provides an overview of the recent advances in developing nanoclusters based on polymeric nanoparticles and/or inorganic NPs, and summarizes the design, fabrication, and properties of noble-metal nanoclusters and hybrid nanoclusters in cancer therapy.
Article
Chemistry, Physical
Marie Bayart, Marie Dubus, Sebastien Charlon, Halima Kerdjoudj, Nicolas Baleine, Samira Benali, Jean-Marie Raquez, Jeremie Soulestin
Summary: Scaffolds with specific features help cells to attach, proliferate, and differentiate. In this study, PLA and PLA/HA scaffolds were produced and the effect of HA particles on the scaffolds was investigated. The presence of HA induced faster and more complete polymer biodegradation, while PLA scaffolds did not degrade during conditioning.
Article
Chemistry, Physical
Michael Lalanne-Tisne, Audrey Favrelle-Huret, Wim Thielemans, Joao P. Prates Ramalho, Philippe Zinck
Summary: Organocatalysts are important in polymerization reactions. This study used Density Functional Theory to investigate the ring-opening polymerization of trimethylene carbonate, revealing a dual mechanism and confirming TBD as a more efficient catalyst.
Review
Chemistry, Multidisciplinary
Wajid Ali, Hazrat Ali, Sami Souissi, Philippe Zinck
Summary: More than 390 million tons of fossil fuel plastics have been produced in 2022, causing major health issues and environmental pollution. Bioplastics are considered as a promising alternative due to their carbon neutrality and biodegradability, but technical and cost limitations prevent them from fully substituting fossil fuel plastics.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Maxime Roger, Yann Bretonniere, Yann Trolez, Antoine Vacher, Imane Arbouch, Jerome Cornil, Gautier Felix, Julien De Winter, Sebastien Richeter, Sebastien Clement, Philippe Gerbier
Summary: This article describes three new tetraphenylethene (TPE) push-pull chromophores with strong intramolecular charge transfer. The compounds were synthesized through [2 + 2] cycloaddition-retroelectrocyclization (CA-RE) click reactions using electron-deficient alkenes and an electron-rich alkyne-tetrafunctionalized TPE. Only the starting TPE-alkyne showed significant aggregation-induced emission (AIE) behavior, while the other compounds did not exhibit fluorescence. The UV-Visible absorption spectra showed a red-shift, especially for TPE-F-4-TCNQ. Photothermal studies revealed promising properties for TPE-TCNQ and TPE-F4-TCNQ in the solid state, with TPE-F4-TCNQ showing excellent performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Editorial Material
Environmental Sciences
Stijn Everaert, Greet Schoeters, Karel Claes, Jean-Marie Raquez, Bart Buffel, Tamara Vanhaecke, Jonas Moens, Juha Laitinen, Nicolas Van Larebeke, Lode Godderis
Summary: Firefighters are exposed to various chemicals that may lead to health issues. Wearing nitrile butadiene rubber undergloves is a preventive measure against toxic accumulation, although its safety is questioned.
Article
Polymer Science
Catarina Bravo, Nicolas Merle, Mathieu Sauthier, Marc Bria, Julien De Winter, Philippe Zinck
Summary: This work presents a simple and effective method for the polymerization of butadiene using nickel allyl complexes as catalysts, achieving chain transfer and the formation of branched polybutadiene. This method allows for the one-pot synthesis of polymers with specific structures.