Article
Polymer Science
Kianoosh Zamani, Suheyla Kocaman, Murat Isik, Ulku Soydal, Nimet Ozmeral, Gulnare Ahmetli
Summary: In this study, walnut shell, hazelnut shell, and mussel shell waste were used as inexpensive reinforcements for epoxy composite materials. The inclusion of mussel shell and chars significantly improved the thermal strength of the epoxy matrix. The composites prepared with bisphenol-A type epoxy resin showed high contact angle values and good flammability stability.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Mechanics
Antigoni Barouni, Colin Lupton, Chulin Jiang, Abu Saifullah, Khaled Giasin, Zhongyi Zhang, Hom N. Dhakal
Summary: This study investigates the fatigue behavior of composite laminates with flax and glass fiber hybrid reinforcements. The hybrid configuration shows a great effect on fatigue life, with the alternating layers of flax and glass demonstrating the best performance and significantly lower probability of failure compared to other configurations. Fabrication-induced defects and fiber-matrix interface also play a role in influencing fatigue life and overall performance of the structures.
COMPOSITE STRUCTURES
(2022)
Article
Multidisciplinary Sciences
Chunhua Lou, Siyu Jiang, An Yan, Yongli Zhou, Yang Liu, Yong Zhang, Xianzhi Kong
Summary: Corn-stalk cellulose was extracted and used as a modifier of epoxy resin to prepare corn-stalk cellulose/epoxy resin composites. The addition of corn-stalk cellulose significantly increased the impact strength and lowered the glass transition temperature of the composites.
SCIENTIFIC REPORTS
(2022)
Article
Polymer Science
Andrzej Puszka, Marcin Knec, Wojciech Franus, Beata Podkoscielna
Summary: The synthesis, characterization, and properties of polymeric composites were investigated. The composites were prepared using commercially available epoxy resin cross-linked with triethylenetetramine. Natural fillers in the form of minerals were added to improve the thermal and mechanical properties. The structures were confirmed using infrared spectroscopy, and the thermal properties were studied through calorimetry and dynamic-mechanical analysis. Hardness and strength tests were also conducted.
Article
Polymer Science
Raquel Gimenez, Berna Serrano, Veronica San-Miguel, Juan Carlos Cabanelas
Summary: This review provides an overview of the recent progress in MXene/epoxy nanocomposites development and the contribution of nanofillers to the enhancement of properties. The application of MXene as a nanofiller in epoxy resins is discussed, highlighting its potential in protective coatings, electromagnetic-interference shielding, and composites. The challenges in this field are also discussed.
Article
Materials Science, Textiles
Julian Rua, Henry A. Colorado, Sergio Neves Monteiro
Summary: This study combines post-consumer PET with fique fabric and epoxy resin to develop a composite material that can reduce plastic pollution. Mechanical testing and microstructure analysis show that this composite has strong structural and impact properties.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Polymer Science
Ya-Shiuan Lee, Wen-Jau Lee, Yi-Chun Chen
Summary: This study investigates the influence of polyurethane resin composition on the reactivity and properties of epoxy resin/polyol/isocyanate blended resin. It is found that the addition of polyurethane resin can improve the toughness of epoxy resin, and different compositions have varying reactivity and properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Suraj Revankar, N. R. Banapurmath, Ashok M. Sajjan, Vijayakumar Nimbagal, Arun Y. Patil, R. Venkatesh, M. A. Umarfarooq, Chandramouli Vadlamudi, Sanjay Krishnappa
Summary: Bio-derived materials are potential sources of sustainable polymers that can reduce carbon emissions. This research focuses on synthesizing epoxy-based composites with a biopolymer called Poly Lactic Acid (PLA) and reinforcing them with CFs to enhance their mechanical properties. Experimental results show that these composites outperform pristine coupons in terms of mechanical properties.
Article
Agricultural Engineering
Neha Uppal, Asokan Pappu, Vijaya Kumar Sorna Gowri, Vijay Kumar Thakur
Summary: This review provides insights into the use of bio-based fibers as reinforcement in polymer matrix composites, specifically focusing on their effect on the tensile characteristics of epoxy composites. While previous studies have mainly focused on improving the strength of the composites, there is limited scientific knowledge regarding modulus and its reinforcing capabilities. Further research is needed to understand the impact of dense regions with high moduli, less dense regions with insignificant moduli, and point-to-point variation in the matrix.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Multidisciplinary
Beibei Jia, Jun Zhou, Jiaxin Chen, Zixuan Zhang, Yang Wang, Zepeng Lv, Kai Wu
Summary: This work investigates the dielectric properties and local dynamic charge mobility behavior at the interface of barium titanate/epoxy resin (BTO/EP) composites from both bulk and local perspectives. The results show that the interface between BTO and epoxy can easily accumulate a negative charge, and nanoscale BTO particles introduce deeper traps than microscale BTO particles to inhibit charge migration. Under the same bias condition, the carriers tend to accumulate near the nanoscale BTO particles rather than the microscale BTO particles. The charge dissipation rate at the interface region in microscale BTO/EP is about one order of magnitude higher than that of nanoscale BTO/EP. This work provides experimental support for understanding the mechanism of charge transport in dielectric composites.
Article
Materials Science, Textiles
Lalta Prasad, Pawan Kapri, Raj Vardhan Patel, Anshul Yadav, Jerzy Winczek
Summary: The compression molding technique was used to fabricate hybrid composites with different wt.% of glass and ramie fibers in different stacking sequences. The physical and mechanical characteristics of the hybrid composites were studied, and the optimal composition was determined using a preference model. The stacking sequence played a crucial role in the characteristics of the composites, with the GRG sequence showing optimal characteristics. Microstructural analysis revealed voids, de-lamination, interfacial bonding, fiber pull-out, and matrix distribution.
JOURNAL OF NATURAL FIBERS
(2023)
Article
Polymer Science
Michelle Souza Oliveira, Fernanda Santos da Luz, Artur Camposo Pereira, Ulisses Oliveira Costa, Wendell Bruno Almeida Bezerra, Juliana dos Santos Carneiro da Cunha, Henry Alonso Colorado Lopera, Sergio Neves Monteiro
Summary: Fiber-reinforced composites are widely investigated and applied materials. This study fills the research gap on water-immersion-accelerated aging in fique fiber-epoxy composites, finding that water degradation leads to complex microfibril structures, plasticization of epoxy resin, and debonding of fique fiber/epoxy matrix. Evaluating material durability is of great importance for material design and application.
Article
Materials Science, Characterization & Testing
Haixia Hu, Mingdong Zhang, Weizhu Liu, Chengjun Wang, Cenyang Xiang, Chen Kong
Summary: The synergistic effects of natural bamboo fibers (BFs) and nano-SiO2 particles in ternary composites have been investigated. The addition of BFs and SiO2 significantly improved the fracture toughness and impact strength of the polymer composites. The BFs/SiO2/epoxy-based ternary composites exhibited improved mechanical and erosive wear properties, especially at the composition of 15 wt% BFs and 3 wt% modified nano-scale SiO2.
Article
Mechanics
Felice Rubino, Hetal Parmar, Tommaso Mancia, Pierpaolo Carlone
Summary: A glass fiber/polypropylene semi-impregnated lamina was added to improve the weldability of an epoxy laminate. Ultrasonic welding of the hybrid composite was performed with varying welding parameters, resulting in different lap-shear strengths and weld interface qualities. The welding time had a significant influence on the intermixing of the thermoplastic layer and the formation of a strong weld area, while the amplitude and pressure mainly affected the power absorption and overall welding performance.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Asanka P. Basnayake, Juan P. Hidalgo, Michael T. Heitzmann
Summary: A detailed study was conducted on the flammability of aluminium hydroxide and ammonium polyphosphate in natural fiber composites manufactured using a resin transfer molding process. Various concentrations of each retardant were used, and the study involved thermogravimetric analysis, cone calorimetry, radiant heat fluxes, and transient plane source method to examine the ignition and burning rate. The research demonstrated a correlation between increasing retardant concentration and flammability.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Textiles
Paulina Kasprzyk, Kamila Blazek, Janusz Datta
FIBERS AND POLYMERS
(2020)
Article
Polymer Science
Kamila Blazek, Paulina Kasprzyk, Janusz Datta
Article
Engineering, Environmental
Ewa Glowinska, Wojciech Wolak, Janusz Datta
Summary: The research focused on the synthesis and properties examination of partially bio-based thermoplastic polyurethane elastomers. By using different diisocyanate mixtures, the study analyzed the chemical structure, thermal, thermomechanical, mechanical, and physicochemical properties of the materials.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Chemistry, Physical
Ewa Glowinska, Paulina Kasprzyk, Janusz Datta
Summary: The study focuses on the preparation of novel bio-based thermoplastic polyurethane elastomers (bio-TPUs) using a diisocyanate mixture. By controlling the composition of biobased hard blocks (HS) and soft blocks (SS), the properties of bio-TPUs can be tailored effectively. The results indicate that increasing the bio-based diisocyanate content enhances the thermal stability and mechanical properties of bio-TPUs, showing promise for the development of fully bio-based polymeric materials.
Article
Polymer Science
Paulina Kasprzyk, Ewa Glowinska, Janusz Datta
Summary: This study confirmed the positive impact of high bio-based monomer content on the processing and properties of polyurethane materials. Partially bio-based TPUs were obtained from bio-based and petrochemical-based polyols, demonstrating comparable mechanical and thermo-mechanical properties, as well as increased eco-friendliness.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Paulina Kasprzyk, Ewa Glowinska, Paulina Parcheta-Szwindowska, Kamila Rohde, Janusz Datta
Summary: This study focuses on green thermoplastic polyurethanes (TPU) obtained by controlling the chemical structure of flexible segments using bio-based polyether polyols. By adjusting the number of flexible segments of a given type, various selected properties of TPU materials can be achieved. Increasing the amount of PO3G1000 in the flexible segments enhances the tensile strength but reduces the elongation at break of TPUs.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
Izabela Zagozdzon, Paulina Parcheta, Janusz Datta
Summary: The study showed that adding phosphorus-containing polyol in polyurethane synthesis can improve the flame resistance and char yield of the material, as well as providing better thermal stability.
Article
Chemistry, Multidisciplinary
Ana M. Borreguero, Irene Izarra, Ignacio Garrido, Patrycja J. Trzebiatowska, Janusz Datta, Angel Serrano, Juan F. Rodriguez, Manuel Carmona
Summary: Polyurethane (PU) is a principal polymer in the global plastic market due to its versatility and continuous improvement. In this study, PU elastomeric materials with thermoregulating properties were produced by incorporating microcapsules (mSD-(LDPE center dot EVA-RT27)) containing paraffin(R)RT27 into the matrix. The density and tensile strength decreased with increasing microcapsule content, with E-1.05 showing better structural and stability properties for microcapsule contents up to 15 wt.% and E-1.1 displaying mechanical and thermal synergy effects with 20 wt.% microcapsule content.
APPLIED SCIENCES-BASEL
(2021)
Article
Biochemistry & Molecular Biology
Joanna Niesiobedzka, Ewa Glowinska, Janusz Datta
Summary: This study investigated the relationship between the chemical structure and the thermal and processing parameters of bio-based isocyanate-terminated ether and ester-urethane prepolymers. It was found that the composition of the bio-based prepolymers, as well as the content of iso-cyanate groups, had significant impacts on their processability. Prepolymers based on poly-ether polyol showed lower viscosity at lower temperatures compared to those based on polyester polyol, with viscosity values depending on the NCO content.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Forestry
Ewa Glowinska, Paulina Kasprzyk, Janusz Datta
Summary: This study focuses on the synthesis of bio-PU composites filled with powdered cellulose and investigates the influence of cellulose on the phase separation between soft and hard segments of bio-PU through analyzing the chemical structure, morphology, thermal and mechanical properties of the composites.
WOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Marcin Wloch, Paulina Landowska
Summary: Bio-based fillers for polymer composites are still of interest due to their low cost and renewable nature. In this study, partially green composites were prepared using thermoplastic poly(ester-urethane) mixed with unmodified and modified grinded buckwheat husks. The results showed that the introduction of buckwheat husks retained high tensile strength but decreased elongation at break. The chemical treatment altered the mechanical properties of the filler and composites.
Article
Thermodynamics
Paulina Parcheta-Szwindowska, Kamila Rohde, Janusz Datta
Summary: Non-isocyanate polyurethanes (NIPUs) are eco-friendly materials synthesized without the use of phosgene, and their production process involves the reaction with carbon dioxide. In this study, NIPUs were successfully obtained through a three-step synthesis pathway using epichlorohydrin. The properties and structures of the obtained materials were compared, and it was found that NIPUs prepared with petrochemical-based epichlorohydrin had lower thermal decomposition activation energy compared to their bio-based counterparts.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Joanna Smorawska, Marcin Wloch, Ewa Glowinska
Summary: This study investigates the effects of multiple processing on bio-based thermoplastic polyurethane elastomers (bio-TPUs). The research found that reprocessing led to changes in the phase separation between the hard and soft segments, resulting in differences in the mechanical properties of the materials. Although there were slight differences in the chemical and thermal properties, the main distinctions were observed in the mechanical properties, with an increase in tensile strength and elongation at break, and a decrease in hardness. The prepared bio-TPUs exhibited characteristics that were closer to those of sustainable materials, promoting the circular economy of plastics.
Review
Chemistry, Multidisciplinary
Joanna Niesiobedzka, Janusz Datta
Summary: Polyurethanes (PUs) are important in the plastics industry and their global market value reached $95.13 billion in 2019 with an expected compound annual growth rate of 12%. Research on green alternatives to fossil-based isocyanates has been increasing due to environmental concerns. However, there is a lack of comprehensive reports or reviews in the field of green PUs.
Article
Polymer Science
Kamila Blazek, Hynek Benes, Zuzana Walterova, Sabina Abbrent, Arantxa Eceiza, Tamara Calvo-Correas, Janusz Datta
Summary: This research focused on the synthesis of bio-based cyclic carbonates using CO2 as a green feedstock and bio-based polyether polyols, aiming to minimize negative environmental impact by implementing solvent-free conditions. The synthesized products were analyzed using various spectroscopy techniques and mass spectrometry, and were successfully used for the preparation of non-isocyanate polyurethane (NIPU) thermosets with potential applications in sound absorbing materials.
