Article
Polymer Science
Abhishek K. Pathak, Lekha Sharma, Hema Garg, Tomohiro Yokozeki, Sanjay R. Dhakate
Summary: In situ chemical linkage between amine-functionalized graphene and epoxy polymer has been successfully achieved, leading to improved mechanical and thermal properties of nanocomposites. The formation of a chemical bond between the graphene and epoxy is demonstrated and its mechanism is derived based on experimental evidence.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Ozgu Ozen, Kerim Yapici, Demet Yilmaz
Summary: This study successfully developed graphene-based electrically conductive textile products with advantages such as low processing costs, flexibility, and washability. The results showed that these conductive textiles have low resistance values and resistance to mechanical deformations, providing significant advantages to the electronic textile market.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Lorenzo Bonetti, Andrea Fiorati, Andrea Serafini, Guido Masotti, Francesca Tana, Agnese D'Agostino, Lorenza Draghi, Lina Altomare, Roberto Chiesa, Silvia Fare, Massimiliano Bianchi, Laura Giorgia Rizzi, Luigi De Nardo
Summary: The use of 2D nanostructured materials as advanced fillers in polymer matrix composites has opened up new industrial applications requiring both electrical and thermal management. The accurate selection and processing of 2D fillers and their matrix can result in unique properties. The development of a family of nanocomposite membranes based on polyurethane and graphene nanoplatelets has shown significant improvements in in-plane thermal conductivity and thermal comfort.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Yi Zhou, Connor Myant, Rebecca Stewart
Summary: Sensors based on electronic textiles have become increasingly prominent in the field of biomechanical monitoring technology. This paper proposes a graphene/fabric composite sensor with good sensitivity and stretchability for human motion monitoring.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Noorshashillawati Azura Mohammad, Sahrim Hj Ahmad, Ruey Shan Chen, Nurul Emi Nor Ain Mohammad
Summary: The introduction of graphene nanoplatelets into rubber toughened epoxy matrix showed significant enhancement in mechanical and thermal properties. The incorporation of GNP optimized tensile strength and modulus, while also improving thermal stability and interfacial interaction between matrix and nanofiller. XRD analysis confirmed the dispersion states of GNP in the epoxy/LENR, highlighting the potential of GNP in enhancing composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Review
Polymer Science
Yahao Liu, Jian Zheng, Xiao Zhang, Ke Li, Yongqiang Du, Guibo Yu, Yunfei Jia, Yu Zhang
Summary: Graphene is considered an ideal material to enhance the performance of propellants, with its microstructure engineering playing a significant role in composite solid propellants. Recent advances in graphene synthesis methods and microstructure engineering have led to new prospects for applications in the propellant field.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Sotirios Kopsidas, Ganiu B. Olowojoba
Summary: Epoxy polymers were modified with a hybrid nanofiller containing graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) at a mass ratio of 9:1, resulting in a significant increase in electrical conductivity and fracture energy. The reduced percolation threshold was attributed to CNTs, while the increased toughness was mainly due to GNPs through crack deflection. The toughening contribution of the hybrid nanofiller was accurately predicted using analytical modeling.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Yuji Ma, Mei Fang, Ming Huang, Na Zhang, Bo Lu, Peipei Yang, Chuntai Liu, Changyu Shen
Summary: A structure optimization strategy was proposed to fabricate non-woven enhanced thermoplastic polyurethane nanocomposite films with a sandwich-like structure. The prepared films showed excellent solid particle erosion resistance, high-tensile strength, and increased thermal conductivity, extending their application on wind turbine blades.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Sotirios Kopsidas, Ganiu B. Olowojoba, Chris Stone, David Clark, A. Manu Haddad, Anthony J. Kinloch, Ambrose C. Taylor
Summary: In this study, the electrical conductivity of carbon-fiber reinforced polymer (CFRP) composites was improved by adding graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs). The modified CFRP laminates demonstrated superior electrical performance and resistance against lightning strike damage, while reducing weight by 20%.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Qi Qin, Jing Chen, Changze Wu, Yixue Wang, Yunan Li, Meng Song
Summary: Novel carbon nanostructures, carbon nanobuds and nanoballs, have been successfully synthesized on the surface of graphene using the electrochemical method. Under a certain potential, carbon nanobuds are grown in situ on the surface of graphene, and with the increase of potential, these nanobuds grow into nanoballs and exfoliate from the graphene surface. Graphene undergoes oxidation at higher potentials, resulting in the formation of graphene oxide fragments.
Article
Polymer Science
Fabiola Lopez-Barajas, Luis Francisco Ramos-deValle, Saul Sanchez-Valdes, Eduardo Ramirez-Vargas, Juan Guillermo Martinez-Colunga, Adriana Berenice Espinoza-Martinez, Luciano da Silva, Jose Francisco Hernandez-Gamez, Oliverio Santiago Rodriguez-Fernandez, Flora Itzel Beltran-Ramirez, Jose David Zuluaga-Parra
Summary: The thermal conductivity of epoxy resins can be greatly improved by adding a hybrid filler of graphene and copper nanoparticles. Wet milling method can be used to obtain the hybrid filler, which can then be used in producing epoxy nanocomposites. XPS results suggest that copper is bonded to the surface nanoparticles of graphene.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Jefersson Alexander Rojas, Luis Felipe de Paula Santos, Edson Cocchieri Botelho, Bruno Ribeiro, Mirabel Cerqueira Rezende
Summary: Combining multi-walled carbon nanotube buckypapers with glass fiber/epoxy resin composites can achieve good electromagnetic interference shielding effectiveness in the X-band and Ku-band; however, adding CNT film to the composites did not improve the elastic properties but rather decreased compression shear and interlaminar shear strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Salman Mahaki, Hamed Khosravi, Esmaeil Tohidlou
Summary: In this study, a chemical precipitation method was used to decorate graphene oxide (GO) with Fe2O3 nanoparticles, resulting in improved mechanical properties of epoxy (EP) composites. Specifically, the hybrid composites containing 0.2 and 0.6 wt% Fe2O3@GO showed the best flexural and wear behaviors.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Vahid Babaahmadi, Ramazan Ali Abuzade, Majid Montazer
Summary: This research developed a novel method to synthesize a high-performance nanocomposite coating on PET fabric to enhance its UV-protection. The in-situ synthesis of rGO-Ag multilayer nanocomposite was achieved through direct redox reaction between Ag+ ions and GO sheets using ultrasonic and thermal treatment. The synthesized AgNPs with average size less than 100 nm were loaded on PET fabric, providing a significantly higher UV protection factor (UPF) of 6145.66 compared to uncoated PET fabric (UPF 33.63). Furthermore, the final fabric showed good air permeability and antibacterial properties due to the coating of rGO-Ag nanocomposite.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Chemical
Boris I. Kharisov, Oxana V. Kharissova, Lucy T. Gonzalez, Yolanda Pena Mendez, Igor E. Uflyand, Idalia Gomez de la Fuente
Summary: Hydroxyapatite (HA) composites with carbon allotropes and nanocarbons are rapidly developing in materials chemistry, especially for medical applications. These composites can be synthesized using various methods and exhibit biocompatibility and hemocompatibility, making them suitable for bone regeneration and wastewater treatment.
Article
Engineering, Mechanical
N. Loypetch, J. Troeltzsch, D. Nestler, L. Kroll, S. Siengchin
Summary: Sandwich structures consisting of short glass fiber-reinforced polypropylene film as skin layer and chemically blown polypropylene as the core material were produced via injection molding, resulting in a distinctive reinforcement effect. The microstructure and bending properties of the sandwich structures depend on the glass fiber-reinforced film and chemically blown core.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Industrial
Welf-Guntram Drossel, Matthias Riemer, Peter Scholz, Tomasz Osiecki, Lothar Kroll, Mariusz Frankiewicz, Waldemar Skomudek
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2020)
Article
Materials Science, Ceramics
Husam Ahmad, Jonas Stiller, Erik Paessler, Daisy Nestler, Lothar Kroll, Guntram Wagner
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2020)
Article
Materials Science, Ceramics
Natalia Nier, Erik Paessler, Julia Weisshuhn, Kristina Roder, Daisy Nestler, Lothar Kroll, Stefan Spange, Guntram Wagner
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2020)
Article
Chemistry, Analytical
Rene Schmidt, Alexander Graf, Ricardo Decker, Michael Heinrich, Verena Krausel, Lothar Kroll, Wolfram Hardt
Article
Mechanics
A. Maier, N. Schramm, L. Kroll
Summary: This paper investigates the potential of using fiber-reinforced thermoplastic composites in high-volume car body structures and examines the interlaminar shear strength at different temperatures, as well as the influence of manufacturing technology. The results show a significant decrease in interlaminar shear strength with temperature increase, and conditioning has an impact on strength at lower temperatures.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Ceramics
Jonas Stiller, Daisy Nestler, Husam Ahmad, Erik Paessler, Guntram Wagner, Lothar Kroll
Summary: This study focuses on the production process of ceramic matrix composites (CMC) based on C/C-SiC, using thermoset injection molding to shape CFRP preforms and testing the properties after converting to C/C-SiC composites.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Teresa Bonfig, Enrico Koerner, Jochen Jebramcik, Lothar Kroll, Ilona Rolfes, Jan Barowski
MATERIALS RESEARCH EXPRESS
(2020)
Article
Automation & Control Systems
Michael Heinrich, Ricardo Decker, Paul Reindel, Katja Boettcher, Isabelle Roth-Panke, Lothar Kroll
Summary: The paper introduces a novel technological approach to influence the rheological properties of thermoplastic materials under acoustic energy. By investigating different parameters such as oscillation frequency and fiber reinforcement percentages under various excitations, the study reveals interacting relationships and potential resource efficiency in energy and material.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Construction & Building Technology
Marco Lindner, Ronny Scharf-Wildenhain, Ralf Gliniorz, Konrad Vanselow, Henrik Funke, Sandra Gelbrich, Lothar Kroll
Summary: This study focuses on the robot-assisted concrete extrusion additive manufacturing process and develops an efficient calibration method to improve component quality and productivity. Experimental results show that the method not only reduces process preparation and cycle time, but also enhances process reliability through stabilized extrusion.
BETON- UND STAHLBETONBAU
(2021)
Article
Chemistry, Physical
Jarne Machiels, Raf Appeltans, Dieter Klaus Bauer, Elien Segers, Zander Henckens, Wouter Van Rompaey, Dimitri Adons, Roos Peeters, Marie Geissler, Katrin Kuehnoel, Lydia Tempel, Thomas Weissbach, Arved Carl Huebler, Akash Verma, Eleonora Ferraris, Wim Deferme, Mieke Buntinx
Summary: In this study, the best paper/functional silver ink combinations were selected, and a flexible high frequency RFID chip was connected to screen printed antennas. Functional RFID labels were integrated into cardboard packaging and its potential application as reusable smart packaging was tested.
Article
Chemistry, Physical
Lena Heemann, Farhad Mostaghimi, Bernd Schob, Frank Schubert, Lothar Kroll, Volker Uhlenwinkel, Matthias Steinbacher, Anastasiya Toenjes, Axel von Hehl
Summary: This study investigates the laser additive processability and mechanical properties of third-generation AHSS based on medium manganese steel, adjusting the stability of retained austenite through intercritical annealing. Higher annealing temperatures result in lower yield strength but an increase in tensile strength, with the maximum elongation at fracture approximately in the middle of the examined temperature field. The microstructure and properties of the alloy were further investigated using various techniques including SEM, hardness measurements, XRD, EBSD, and element mapping.
Article
Materials Science, Multidisciplinary
Joerg Bellmann, Kristina Roder, Martina Zimmermann, Eckhard Beyer, Lothar Kroll, Daisy Nestler
Summary: Magnetic pulse welding is a promising joining technology for large-scale production of dissimilar metallic joints. High temperatures play a crucial role in the joint formation process; different thermal properties of target materials affect joint formation; copper interlayer may lead to a decrease in weld length or quality.
Article
Chemistry, Analytical
Georg C. Schmidt, Jonas M. Werner, Thomas Weissbach, Joerg Strutwolf, Robert Eland, Welf-Guntram Drossel, Arved C. Hubler
Summary: This study demonstrates a novel paper-based multifunctional haptic feedback device that provides clear tactile feedback, audible information, and color printing for interactive displays. The device is flexible and lightweight, and exhibits high out-of-plane deflection at a moderate driving voltage.
Proceedings Paper
Materials Science, Multidisciplinary
Andreas Maier, Bernhard Staudt, Lothar Kroll
Summary: This study investigates the tailored use of continuous fibre-reinforced plastics in high volume car body structures, focusing on the effect of hybridization on mechanical properties. Results indicate a strong dependency of flexural modulus and strain to failure on the geometrical placement of fibres and fibre fractions. Customization of mechanical properties of profiles is achieved by adjusting the carbon/glass ratio and spatial arrangement of fibres.
MATERIALS TODAY-PROCEEDINGS
(2021)