Article
Materials Science, Composites
Zijian Lu, Wei Wu, Dietmar Drummer, Yi Wang, Chao Liu, Shuo Li, Xintong Zhao
Summary: Studying new thermal conductivity fillers is important for practical thermal management applications. In this study, a multi-scale assembled thermal conductivity composite Al2O3-ZnO NWs/GO/EP was developed. The composite exhibited good thermal conductivity and mechanical properties with low content of fillers.
POLYMER COMPOSITES
(2023)
Article
Engineering, Environmental
Qiang Chen, Lei Liu, Anlin Zhang, Wenduo Wang, Zhengzhou Wang, Jianzhong Zhang, Jiabing Feng, Siqi Huo, Xuesen Zeng, Pingan Song
Summary: An iron phenylphosphinate-functionalized graphene oxide nanohybrid was synthesized and incorporated into epoxy resin to enhance its fire retardancy and mechanical properties. The resulting epoxy nanocomposite exhibited improved fire resistance and tensile strength compared to the pristine epoxy resin. This work provides an innovative strategy for the design of multifunctional epoxy nanocomposites, with great potential for various industrial applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Azadeh Mirabedini, Liam Anderson, Dennis Antiohos, Andrew Ang, Mostafa Nikzad, Franz Konstantin Fuss, Nishar Hameed
Summary: In this study, graphene nanoplatelets (GnP)-modified epoxy polymer nanocomposites with different concentrations were developed using two processing techniques. The results showed that ultrasonication enabled better exfoliation of graphene sheets, resulting in higher electrical conductivity at lower filler concentrations. Thermal conductivity, on the other hand, was mainly affected by the restacking of graphene sheets. Additionally, effective thermal and electrical conductivity models were defined to predict the performance of nanocomposites at different loadings. The optimized nanocomposite was successfully embedded into a carbon fiber laminate composite to enhance its properties.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Long Chen, Yishu Zhang, Zhanqiang Liu, Qinghua Song, Chaozong Liu
Summary: This study prepared a type of anti-/deicing material by reinforcing modified shape memory epoxy resin with graphene oxide (GO), which significantly enhanced the thermal and anti-/deicing performance of the composite. The uniform dispersion of GO in the shape memory EP formed heat conduction network channels, leading to improved heat transfer rate and shape recovery rate. Additionally, the content of GO directly affected the anti-/deicing efficiency of the composite.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Composites
Yalin Zhao, Zhixiong Wu, Shibin Guo, Zhengrong Zhou, Zhicong Miao, Shiyong Xie, Rongjin Huang, Laifeng Li
Summary: The HPB-GO nanocomposite prepared by grafting hyperbranched polymer exhibits excellent mechanical and thermal properties, improving the application performance of epoxy resin.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Polymer Science
Gabriela Yolotzin Romero-Zuniga, Damaso Navarro-Rodriguez, Maria Esther Trevino-Martinez
Summary: In this study, shape memory polymers (SMP) were prepared using dual thiol-epoxy/thiol-ene reactions with the incorporation of graphene oxide modified with methacrylate groups (GO(M)). The addition of GO(M) improved properties such as Young modulus, tensile strength, Izod impact strength, torque, and glass transition temperature in the epoxy resin network. The covalent linking of GO(M) was found to enhance polymer-particle interaction and particle dispersion, resulting in high storage modulus and deformation capacity in the SMP.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Weijun Yang, Hui Ding, Tianxi Liu, Rongxian Ou, Jieying Lin, Debora Puglia, Pengwu Xu, Qingwen Wang, Weifu Dong, Mingliang Du, Piming Ma
Summary: By combining vanillin-based epoxy resin with graphene aerogel, inherently flame-retardant and thermally conductive composites were successfully designed and prepared. The composite material exhibits superior mechanical and thermal properties, making it suitable for the preparation of high-performance biobased flame-retardant materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Xue Liang, Xiaojie Li, Yong Tang, Xiyu Zhang, Wei Wei, Xiaoya Liu
Summary: In this study, graphene oxide (GO) sheets were covalently linked with hyperbranched epoxy resin to enhance the properties of epoxy composites. The functionalized GO sheets showed better dispersion and interfacial compatibility, leading to significant improvements in mechanical and thermal properties. The results suggest that the functionalized composite is a promising, all-purpose modifier for epoxy resins.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Hao Wu, Li Cheng, Chengbao Liu, Xijian Lan, Haichao Zhao
Summary: The study synthesized a bio-based cardanol epoxy modified graphene oxide nanomaterial and applied it in epoxy coatings, achieving a fine interface towards high performance anticorrosion composite coatings. The results showed that the prepared GODN nanomaterial had strong interfacial interaction and enhanced adhesion in epoxy resin.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Alexandra Carvalho, Mariana C. F. Costa, Valeria S. Marangoni, Pei Rou Ng, Thi Le Hang Nguyen, Antonio H. Castro Neto
Summary: In this study, a precise determination of the oxygen content of graphene oxide samples was achieved by combining state-of-the-art ab initio computational modeling with X-ray photoemission spectroscopy. The shift of the XPS C1s peak relative to pristine graphene was accurately described using a mathematical equation, providing a method for determining the degree of oxidation of graphene oxide.
Article
Engineering, Chemical
Chang Su, Jianfang Guo, Jue Cheng, Junying Zhang, Feng Gao
Summary: In this research, heterogenous epoxidation of microcrystalline cellulose (MCC) using a phase transfer catalyst was conducted. It was found that the modification of hydroxyl groups on MCC improved its compatibility and dispersibility with epoxy resin. The epoxidized MCC (EP-MCC) also showed enhanced interface interactions with the epoxy network, resulting in increased modulus and toughness.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Jiheng Ding, Hongran Zhao, Min Zhou, Panlin Liu, Haibin Yu
Summary: The study successfully fabricated a bioinspired graphene-based coating by mimicking the microstructure of nacre, which shows high protectiveness and greatly enhanced anticorrosion performance. Compared to conventional blending methods, this coating has higher compactness and alignment degree, contributing to its superior physical barrier properties.
Article
Materials Science, Multidisciplinary
F. M. El-Hossary, Ahmed Ghitas, A. M. Abd El-Rahman, M. Abdelhamid Shahat, Mohammed H. Fawey
Summary: The oxygen plasma treatment technique enhances the microstructure, adhesion force, and electrical properties of GO films. It reduces oxygen-containing groups, increases surface roughness and work of adhesion, and improves electrical conductivity. Tuning the degree of oxidation can lead to new developments in GO-based applications.
Article
Nanoscience & Nanotechnology
Hang Chi, Zewen Lin, Yuxin Chen, Renhao Zheng, Hong Qiu, Xiaolan Hu, Hua Bai
Summary: This paper reports on the direct ink writing 3D printing of multifunctional composite materials based on commercial epoxy resin and the recycling of printed composite materials. By adding graphene nanoplatelets as a thixotropic additive, the liquid epoxy resin can be shear-thinning and suitable for direct ink printing. The printed composite materials have high resolution, high mechanical strength, as well as high thermal and electrical conductivity, and fast thermo-induced shape memory response. The printed objects can be recycled by comminuting them into micropowders and used as a thixotropic agent for preparing recycled DIW ink.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Xin Chen, Kai Wu, Yongzheng Zhang, Dingyao Liu, Runlai Li, Qiang Fu
Summary: By weaving hierarchically arranged PBO fibers into an epoxy matrix, a 3D continuous thermal pathway is achieved, resulting in enhanced thermal conductivity in polymers.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Lorenzo Ferrari Barusso, Corrado Boragno, Edvige Celasco, Mariia Fedkevych, Giovanni Gallucci, Matteo De Gerone, Daniele Grosso, Luca Repetto, Kifayat Niazi, Manuela Rigano, Claudio Macculi, Matteo D'Andrea, Flavio Gatti
Summary: This article presents the structure and working principle of the 50 mK cryogenic focal plane anticoincidence detector (CryoAC) of the Athena X-ray observatory, and highlights the importance of the phonon hot spot in signal generation.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
Edvige Celasco, Lorenzo Ferrari Barusso, Matteo De Gerone, Giovanni Gallucci, Daniele Grosso, Pietro Manfrinetti, Luca Repetto, Marine Schott, Flavio Gatti
Summary: This article discusses the recent development in cosmic microwave detection using planar antenna coupled transition edge sensor (TES), which shows promise for meeting the requirements of future cosmology missions. The authors are working on the development of bolometers with a planar sinuous antenna for dense arrays in imaging, polarization measurement, earth observation, and security applications. The article presents a preliminary bolometer design and initial studies on Ti/Au and Ir/Au TESs, with a focus on the dependence of the transition temperature on thermal profile and oxygen contamination during production or annealing.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Chemistry, Applied
Lorenzo Pezzana, Giuseppe Melilli, Marco Sangermano, Nicolas Sbirrazzuoli, Nathanael Guigo
Summary: In this work, a diglycidyl furfuryl amine (DGFA) was synthesized to produce a functional coating. A room temperature curing process, using bio-based itaconic acid (IA), was implemented to reduce energy consumption. The curing process was characterized using DSC, rheology, and real-time ATR FTIR, while the thermo-mechanical properties were analyzed using DMTA. Finally, the surface properties of the coating were modified via a UV-induced thiol-ene reaction between itaconic acid moieties and fluorine-based monomers. The surface functionalization was evaluated using contact angle measurements and XPS analysis.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Review
Materials Science, Multidisciplinary
Rossella Sesia, Silvia Spriano, Marco Sangermano, Sara Ferraris
Summary: Corrosion is a significant problem for steel, and research has focused on developing effective corrosion prevention strategies. Commonly used corrosion inhibitors can be harmful, so there is interest in finding natural alternatives. Polyphenols, derived from plants or agricultural by-products, have been investigated for their rust conversion and corrosion prevention properties. This review discusses the use of polyphenols as rust converters, in green anticorrosive coatings, and as active components in corrosion-inhibiting primers. Polyphenolic additives in coatings are also explored as sustainable systems to improve corrosion resistance.
Article
Engineering, Manufacturing
Michael Zanon, Raquel Cue-Lopez, Enrique Martinez-Campos, Paula Bosch, Davy-Louis Versace, Hassan Hayek, Nadia Garino, Candido Fabrizio Pirri, Marco Sangermano, Annalisa Chiappone
Summary: The importance of 3D printable hydrogels in tissue engineering is increasing due to their similarity with the human body's extracellular matrix. This study utilized Quinizarin-based bioderived photoactive dyes to enable 3D printing of methacrylated chitosan through vat photopolymerization. The use of these dyes improved printability and resolution while also acting as photosensitizers and fillers/crosslinkers. The study successfully achieved defined chitosan 3D structures with suspended features using Digital Light Processing, and also evaluated the mechanical and swelling properties of the hydrogels, as well as their potential application in tissue engineering through cell proliferation analysis.
ADDITIVE MANUFACTURING
(2023)
Article
Multidisciplinary Sciences
Sathiyaraj Subramaniyan, Matteo Bergoglio, Marco Sangermano, Minna Hakkarainen
Summary: In order to move towards a circular bioeconomy, a paradigm shift from traditional petroleum-based non-recyclable thermosets to biobased repeatedly recyclable materials is required. Two mechanically and chemically recyclable extended vanillin-derived epoxy thermosets were successfully fabricated by introducing Schiff-base/imine covalent dynamic bonds. These thermosets exhibited good thermal and mechanical properties, stability in common organic solvents, and the ability to be thermally reprocessed through compression molding. Furthermore, they could be rapidly and completely chemically recycled to water-soluble aldehydes and amines by imine hydrolysis in 0.1M HCl solution.
Article
Chemistry, Multidisciplinary
Alessia Fortunati, Francesca Risplendi, Michele Re Fiorentin, Giancarlo Cicero, Emmanuele Parisi, Micaela Castellino, Elena Simone, Boyan Iliev, Thomas J. S. Schubert, Nunzio Russo, Simelys Hernandez
Summary: The development of efficient CO2 capture and utilization technologies driven by renewable energy sources is essential to reduce the impact of climate change. In this study, seven imidazolium-based ionic liquids were tested as catholytes for electrocatalytic CO2 reduction to CO. Different selectivities for CO2 reduction or H2 evolution were observed among the different ionic liquids.
COMMUNICATIONS CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Eleonora Cara, Philipp Hoenicke, Yves Kayser, Joerg K. N. Lindner, Micaela Castellino, Irdi Murataj, Samuele Porro, Angelo Angelini, Natascia De Leo, Candido Fabrizio Pirri, Burkhard Beckhoff, Luca Boarino, Federico Ferrarese Lupi
Summary: This study characterized the sequential infiltration synthesis process and validated the results using nondestructive methods such as X-ray fluorescence, X-ray photoelectron spectroscopy, and scanning transmission electron microscopy.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Chemical
Giulia Cuatto, Maddalena Zoli, Mario Gallone, Hilmar Guzman, Micaela Castellino, Simelys Hernandez
Summary: A facile, reproducible, and scalable wet precipitation method was optimized to synthesize Cu2O nanocubes with tuneable morphology and photocatalytic properties. The size of Cu2O crystallites was controlled by adjusting the flow rate of the reducing agent, resulting in enhanced photo-electrocatalytic activity.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Electrical & Electronic
L. Ferrari Barusso, S. Tugliani, M. Fedkevych, E. Celasco, G. Gallucci, D. Grosso, P. Manfrinetti, K. Niazi, F. Gatti
Summary: Iridium films grown by pulsed laser deposition (PLD) exhibit higher critical temperatures (T-c) compared to bulk materials, which is dependent on the film's thickness and deposition conditions. In this study, different film configurations were grown with varying laser focusing, distance to the Ir target, and deposition time. The T-c was measured and the film's structure was examined using X-ray diffraction (XRD) to investigate any correlation with grain size. The objective was to determine the optimal growth conditions for Ir films to accurately predict T-c using XRD pattern characteristics.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Chemistry, Multidisciplinary
Anna Liguori, Eugenia Oliva, Marco Sangermano, Minna Hakkarainen
Summary: Four isosorbide-based photocurable resins were designed and their correlations with composition, chemical structure, DLP 3D printability, thermoset properties, and recyclability were investigated. The study revealed the significant impact of resin composition on printability and physical properties of the resulting thermosets. The research also highlighted the successful reprocessing or chemical recycling of ester-imine thermosets with preserved elastic modulus, emphasizing the role of ester functionality concentration in recycling.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Ines Cazin, Elisabeth Rossegger, Ignazio Roppolo, Marco Sangermano, Petra Granitzer, Klemens Rumpf, Sandra Schloegl
Summary: Additive manufacturing is a promising technique for fabricating customized 3D objects. Interest is growing in using magnetic materials for 3D printing functional devices. In this study, magnetic Fe3O4 nanoparticles were introduced into a dynamic photopolymer network, which allowed for thermo-activated bond exchange reactions and the healing of 3D-printed structures. The magnetically responsive composites showed potential for use in healable soft devices activated by external magnetic fields.
Article
Engineering, Manufacturing
Cristian Mendes-Felipe, Riccardo Cofano, Ander Garcia, Marco Sangermano, Senentxu Lanceros-Mendez
Summary: The manufacturing industry is adopting plant-based and renewable resources to replace fossil fuel materials for a more environmentally friendly and sustainable economy. The combination of these materials with conductive fillers allows for the fabrication of conductive tracks and sensors essential for the implementation of the IoT and Industry 4.0 concepts.
ADDITIVE MANUFACTURING
(2023)
Article
Chemistry, Applied
Lorenzo Pezzana, Alice Emanuele, Raffaella Sesana, Cristiana Delprete, Eva Malmstrom, Mats Johansson, Marco Sangermano
Summary: The scientific community is actively researching bio-based derivatives to reduce the consumption of fossil-based materials and their environmental impact. Developing bio-based plastics is a significant challenge in achieving sustainability and a green economy. A study focused on using a bio-based monomer, isosorbide, for the production of bio-based resins used in coatings. They successfully functionalized isosorbide to introduce epoxy groups, which were then activated through UV radiation for cross-linking. The bio-based resin showed potential for UV-cationic curing, reaching conversion rates above 85%. Additionally, they added a bio-based filler, macadamia nutshell powder (MAC), to increase the surface hardness of the coating. The resulting coating with 30% MAC showed a significant increase in hardness compared to the pristine bio-based epoxy resin. Thermo-mechanical analysis revealed that the addition of MAC also increased the glass transition temperature (Tg) of the coating.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Multidisciplinary
Amandine L. Flourat, Lorenzo Pezzana, Sabrina Belgacem, Abdouramane Dosso, Marco Sangermano, Sami Fadlallah, Florent Allais
Summary: In this study, tunable bis-allylated compounds were efficiently synthesized from cellulose-derived levoglucosenone via a chemo-enzymatic pathway, and then polymerized through photocuring, resulting in thermosets suitable for 3D printing.
