Article
Polymer Science
Shengnan Li, Xiaojuan Zhao, Yu Zhang, Xin Yang, Ran Yu, Ying Zhang, Kuilin Deng, Wei Huang
Summary: The cage-ladder-structure phosphorus-containing amino-functionalized polyhedral oligomeric silsesquinoxanes (CLNH2-POSS) were successfully synthesized through a catalyst-free hydrolytic condensation method and added into epoxy resins to improve their flame retardant properties, as well as enhance the thermal and mechanical performance of the composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Yijun Zhang, Dawei Pan, Changfan Chang, Hua Liu, Zuozhen Liu
Summary: A highly reactive intrinsic epoxy flame retardant FREP was synthesized successfully and introduced into epoxy resin to improve fire safety, with EP/FREP-4 thermoset achieving a UL94 V-0 rating. FREP reduced the peak heat release rate and total smoke production of EP, showing significant flame retardant effects.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Angela Marotta, Noemi Faggio, Veronica Ambrogi, Alice Mija, Gennaro Gentile, Pierfrancesco Cerruti
Summary: The study investigated the effect of TiO2 on the curing behavior of the resin and the performance of the coatings, revealing that TiO2 particles reduce crosslinking degrees and glass transition temperatures, while enhancing chemical resistance of the coatings to acetic acid and ethanol.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Polymer Science
Muhammad Abdur Rashid, Wanshuang Liu, Yi Wei, Qiuran Jiang
Summary: Thermosets are extensively used in various industries, but the majority are made from petroleum resources, posing recycling challenges. The incorporation of dynamic covalent linkages can produce repairable, reprocessable, and reworkable thermosets to reduce waste. Additionally, using green and sustainable biomass resources can assist in lowering petroleum usage and mitigating environmental issues.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Audrey Magnin, Lisa Entzmann, Alfred Bazin, Eric Pollet, Luc Averous
Summary: Polyurethane waste recycling is challenging, but a green recycling pathway was proposed in this study through enzyme depolymerization and organometallic-catalyzed synthesis of second-generation polymers.
Article
Polymer Science
Leman Buzoglu Kurnaz, Yishayah Bension, Chuanbing Tang
Summary: Reprocessable and biobased thermosets were prepared using renewable feedstocks, lignin and polyamine, which were oxidized to produce polycarbonyl and further reacted to form a crosslinked network of imines. The mechanical strength and thermal properties of the thermosets can be adjusted by changing feedstock ratios, and the dynamic imine crosslinks can be reformed.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Zhuang Hou, Haopeng Cai, Chuan Li, Bolun Li, Huihuan Wang
Summary: The phosphorous/silicon/triazine-containing flame retardant DTD enhances the flame retardancy and mechanical properties of epoxy resin simultaneously. It shows excellent flame retardancy with a limited oxygen index (LOI) value of 36.6% and UL-94 V-0 rating. Additionally, DTD exhibits good compatibility with epoxy resin and improves its mechanical properties. The experiment results demonstrate the effective performance of DTD in flame retardancy and charring capability.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Agustin Forchetti Casarino, Santiago Andres Bortolato, Natalia Casis, Diana Alejandra Estenoz, Marisa Elisabet Sponton
Summary: This research focuses on the development of thermosetting systems derived from a siloxane-based benzoxazine hybrid precursor. The influence of siloxane composition on the morphology and properties of the materials was investigated. The results showed that an increase in the content of benzoxazine or epoxy resin affected the morphology of the materials, and the incorporation of polysilsesquioxane-based precursor improved the investigated properties.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jonathan Bassut, Kifah Nasr, Gregory Stoclet, Marc Bria, Jean-Marie Raquez, Audrey Favrelle-Huret, Robert Wojcieszak, Philippe Zinck, Ivaldo Itabaiana Jr
Summary: Levoglucosan (LGA) has gained increasing attention as a pyrolytic sugar with potential applications in various industries. In this study, a series of LGA-containing polymers were synthesized for the first time through a regioselective transesterification reaction, and the effect of LGA content on the properties of the polymers was investigated.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Jing Yi, Yuze Dai, Yuxuan Li, Yuanpeng Wu, Min Jiang, Guangyuan Zhou
Summary: In this study, a series of recyclable multifunctional biobased polymers were successfully synthesized by introducing reversible Diels-Alder bonds and bismaleimide. These polymers exhibit tunable thermal and mechanical properties and have potential applications in various fields.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Yin Lu, Yaliang Peng, Yi Yang, Jiahao Liu, Kan Zhang
Summary: In this study, a benzoxazine monomer (oHPNI-fa) with both norbornene and furan groups was designed and synthesized to meet the urgent need for novel high-performance resins in the aerospace and electronics industries. The molecular structure of oHPNI-fa was verified through various characterization techniques. The thermally activated terpolymerization of oHPNI-fa was monitored and its low-temperature-curing characteristics were revealed and discussed. The resulting highly cross-linked thermoset based on oHPNI-fa exhibited excellent thermal stability and flame retardancy. The molecular design strategy used in this study provides a guide for the development of high-performance resins for aerospace and electronics applications.
Article
Polymer Science
Shengsong Dai, Xuejun Yu, Rui Chen, Hong Zhou, Zhiquan Pan
Summary: The introduction of a new N/P/S-containing flame retardant (HBD) significantly enhances the fire retardancy of epoxy resin (EP) composites. With a phosphorus content of 0.48wt%, EP/HBD achieves a V-0 rating and shows notable improvements in cone calorimeter tests.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Alfred Bazin, Luc Averous, Eric Pollet
Summary: Enzymatic polymerization is a promising approach for greener synthesis of biobased polyesters, with the successful synthesis of aliphatic-aromatic copolyesters in this study. By changing the solvent and adjusting reaction conditions, the molecular weight was enhanced and the properties were improved, offering new perspectives for the potential applications of enzymatically-produced biobased aromatic copolyesters.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Xuan-Yu He, Ting Wang, Zhong-Cheng Pan, Abdul Qadeer Dayo, Jun Wang, Wen-Bin Liu
Summary: In this article, a novel multifunctional benzoxazine monomer MB-FH was successfully synthesized with high reaction efficiency and short reaction time. The introduction of hydroxyl groups greatly improved the curing and thermal properties of polybenzoxazine.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
A. Chiloeches, A. Funes, R. Cuervo-Rodriguez, F. Lopez-Fabal, M. Fernandez-Garcia, C. Echeverria, A. Munoz-Bonilla
Summary: This study reported the synthesis of clickable polymers derived from biobased itaconic acid, which were used to prepare novel cationic polymers with antibacterial properties and low hemotoxicity via click chemistry. The modified polymers exhibited potent antibacterial activity against Gram-positive bacteria and low hemolysis, showing excellent selectivity for Gram-positive bacteria over human red blood cells.
Article
Energy & Fuels
Sara J. Marciano, Francisco Avelino, Lucas Renan Rocha da Silva, Selma E. Mazzetto, Diego Lomonaco
Summary: The aim of this study was to evaluate the effects of acetosolv coconut shell lignin (ACSL) and phosphorylated acetosolv coconut shell lignin (P-ACSL) as bio-additives in epoxy resins on their thermal and UV-blocking properties. The results showed that both lignins significantly enhance the thermal and thermo-oxidative stabilities of the thermosetting materials, as well as slightly increase their glass transition temperatures (T-g). Furthermore, ACSL and P-ACSL exhibited excellent UV stabilization properties.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Nayara de Oliveira Souza, Diana Araujo Cunha, Nara Sousa Rodrigues, Thayllan Teixeira Bezerra, Diego Lomonaco, Selma Elaine Mazzetto, Carlos Henrique Gomes Martins, Luciana Assirati Casemiro, Vicente de Paulo Aragao Saboia
Summary: Cashew nut shell liquid (CNSL), anacardic acid, and cardol demonstrated antibacterial activity against oral bacteria; the incorporation of these substances into adhesive did not reduce its performance; there was no significant impact on microtensile bond strength, flexural strength, hardness, water sorption, and solubility.
Article
Dentistry, Oral Surgery & Medicine
M. V. S. Lemos, V. G. Araujo-Neto, D. Lomonaco, S. E. Mazzetto, V. P. Feitosa, S. L. Santiago
Summary: The study evaluated the effects of new monomers derived from cashew nut shell liquid (CNSL) on resin-dentin bond strength, nanoleakage, and micropermeability. Cardol-methacrylate showed promising results in enhancing bond strength and reducing nanoleakage, particularly in caries-affected dentin. The treatment improved interfacial integrity and sealing ability compared to other treatments.
OPERATIVE DENTISTRY
(2022)
Article
Agriculture, Dairy & Animal Science
Antonio Joelson Netto, Aderbal Marcos de Azevedo Silva, Leilson Rocha Bezerra, Ariadne de Barros Carvalho, Deuber Lincon da Silva Agostini, Diego Lomonaco Vasconcelos de Oliveira, Selma Elaine Mazzetto, Lloyd Ryan Viana Kotzebue, Jessica Ribeiro Oliveira, Ronaldo Lopes Oliveira, Jose Morais Pereira Filho, Andre Leandro da Silva
Summary: The study showed that inclusion of up to 30 g/kg of U-12 microencapsulated urea in sheep diets can improve performance and feed efficiency while promoting lower concentrations of blood urea and urinary urea. This can reduce the risk of urea toxicity and provide a safer way to supply NPN to ruminants, enhancing N utilization.
ANIMAL PRODUCTION SCIENCE
(2022)
Article
Environmental Sciences
Helina dos Santos Nascimento, Bruno do Amaral Crispim, Felipe Mendes Merey, Fabio Kummrow, Ricardo Augusto dos Passos, Claudia Andrea Lima Cardoso, Diego Lomonaco, Kelly Mari Pires de Oliveira, Fabiana Gomes da Silva Dantas, Eduardo Jose de Arruda, Alexeia Barufatti
Summary: The use of traditional insecticides for mosquito control is still necessary, but environmentally friendly alternatives are needed due to their negative impacts and increasing mosquito resistance. Research has shown that partially neutralized tCNSL derivatives have larvicidal activity against Aedes aegypti, making them a potential solution for controlling the spread of these mosquitoes.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Engineering, Chemical
Francisco P. Marques, Aldo S. Colares, Maria N. Cavalcante, Jessica S. Almeida, Diego Lomonaco, Lorena M. A. Silva, Morsyleide de Freitas Rosa, Renato C. Leitao
Summary: This study optimized the recovery of lignin from coconutfiber, oil palm mesocarp fiber, and sugarcane bagasse using ethanol organosolv, and found that sugarcane bagasse lignin is a better choice. The obtained lignins had high purity and quality, with slightly different structural characteristics.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Allann Karlos Alves da Mata, Vinicius Taveira de Andrade Felipe, Selma Elaine Mazzetto, Diego Lomonaco, Francisco Avelino
Summary: The optimization of lignin extraction parameters is crucial for obtaining lignin with specific structural features. This study developed an eco-friendly organosolv protocol to tune the acetylation degree of coconut shell lignins (CSLs) using MgCl2 and HCl as catalyst and co-catalyst. The results showed that the use of HCl as co-catalyst increased the lignin yield and acetylation degree, enhancing the thermal, antioxidant, and UV-blocking properties of CSLs.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Pharmacology & Pharmacy
Thayllan Teixeira Bezerra, Mayara Oliveira de Almeida, Nayane Maria de Amorim Lima, Naya Lucia de Castro Rodrigues, Viviane Gomes Pereira Ribeiro, Maria Jania Teixeira, Luigi Carbone, Giuseppe Mele, Diego Lomonaco, Selma Elaine Mazzetto
Summary: This study prepared green-based silver nanoparticles with cashew nutshell liquid and characterized their properties. The in vitro antileishmanial activity tests showed that cardol had high selectivity towards killing the parasite and should be further explored as a promising non-toxic treatment for cutaneous leishmaniasis.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
Article
Polymer Science
Kassia Teixeira da Silva, Beatriz. S. S. Oliveira, Lucas R. R. da Silva, Adriano L. A. Mattos, Selma. E. E. Mazzetto, Diego Lomonaco
Summary: In recent decades, there has been a growing trend to replace petro-based adhesives with sustainable and eco-friendly alternatives, especially in the wood industry. This study developed and characterized novolac-type phenolic resins from cashew nut shell liquid (CNSL), which is an agro-industrial residue and a sustainable alternative to petroleum-derived chemicals, for the development of bio-based polymers. The CNSL and paraformaldehyde were reacted using oxalic acid as a catalyst under a solvent-free method, resulting in a dark and viscous resin with high molar mass and thermal stability. The combination of CNSL-based novolac resin (CNSL-nov) with commercial epoxy resin (DGEBA) was proposed as an alternative to conventional hardeners, proving to be efficient in obtaining highly cross-linked polymers with excellent thermal performance and potential for the wood industry, thereby improving the bio-based content of high-performance adhesives.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Luisa Macedo de Vasconcelos, Niedja Fittipaldi Vasconcelos, Diego Lomonaco, Morsyleide de Freitas Rosa, Enrique Rodriguez-castellon, Fabia Karine Andrade, Rodrigo Silveira Vieira
Summary: Bacterial cellulose (BC) membrane is a biopolymer with high purity and excellent properties. In this study, microwave-assisted chemical modification was used to oxidize wet BC membranes, while preserving their physical and mechanical properties. The results showed that microwave heating method can better protect the structure of cellulose, improve the oxidation effect, and have less impact on the crystalline structure of cellulose.
Article
Chemistry, Physical
Iolanda Frota de Farias, Renan de Oliveira Goncalves, Maria Daiane de Freitas, Francisco Leomar da Silva, Anderson Freitas de Sousa, Maria Teresa Salles Trevisan, Diego Lomonaco, Francisco Jose Queiroz Monte, Aluisio Marques da Fonseca, Telma Leda Gomes de Lemos
Summary: Pyrazolines are heterocyclic compounds with nitrogen-containing rings known for their pharmacological potential. This study synthesized thirteen pyrazoline derivatives with total yields of 56 - 90% and characterized them using various spectroscopic techniques. The compounds were evaluated for antioxidant activity and acetylcholinesterase inhibition, showing varying levels of activity. Molecular docking studies revealed two compounds with excellent binding affinity and pose.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Agriculture, Dairy & Animal Science
Joana A. M. de Lima, Leilson R. R. Bezerra, Thiago J. de O. Feitosa, Jessica R. Oliveira, Diego L. V. de Oliveira, Selma E. E. Mazzetto, Monica T. Cavalcanti, Jose M. Pereira Filho, Ronaldo L. L. Oliveira, Juliana P. F. de Oliveira, Andre L. da Silva
Summary: This study used melt-emulsification technique to produce rumen-protected fat microspheres using carnauba wax as encapsulant material. The microencapsulation efficiency increased with the addition of buriti oil. The inclusion of buriti oil in the sheep's diet increased energy density without significant effects on protozoal populations and blood serum metabolites.
TROPICAL ANIMAL HEALTH AND PRODUCTION
(2023)
Article
Chemistry, Physical
Joao Brandao Junior, Jean Gleison Andrade do Nascimento, Michael Pablo Franca Silva, Eliane de Aquino Lima Brandao, Viviane de Castro Bizerra, Kaiany Moreira dos Santos, Juliana de Franca Serpa, Jose Cleiton Sousa dos Santos, Aluisio Marques da Fonseca, Diego Lomonaco Vasconcelos de Oliveira, Maria Cristiane Martins de Souza
Summary: In this study, biodiesel was produced from vegetable oils through enzymatic esterification. The results showed that the enzyme catalysts had better performance compared to chemical catalysts.
Article
Energy & Fuels
Adriano Lincoln Albuquerque Mattos, Diego Lomonaco, Beatriz Silva de Oliveira, Lloyd Ryan Viana Kotzebue, Jonas Durval da Silva Vieira, Maira Saldanha Duarte, Renato Carrha Leitao
Summary: This study presents an alternative method for fabricating green medium density fiberboard using bio-oil based benzoxazine resins. The sugarcane bagasse fiber is used instead of wood fiber, and the fossil-based resin is replaced by the bio-based benzoxazine resin. The results indicate the promising potential of using sugarcane bagasse for the development of bio-based materials with technological application.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Biochemistry & Molecular Biology
Vinicius Taveira Andrade Felipe, Jessica Fernandes Marques, Mauro Ricardo da Silva Silveira, Carlos Arthur Ferreira, Selma Elaine Mazzetto, Diego Lomonaco, Francisco Avelino
Summary: This study aimed to evaluate the potential of acetosolv coconut fiber lignin (ACFL) as an additive to DGEBA, curing it with an aprotic IL ([BMIM][PF6]), and analyze the properties of the resulting thermosetting materials. ACFL was obtained by mixing coconut fiber with acetic acid and HCl, and characterized by FTIR, TGA, and 1H NMR. The cured ACFL-incorporated epoxy resins showed enhanced chemical, thermal, and combustion properties, making ACFL a promising bio-additive for high-performance materials.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)