Review
Materials Science, Composites
Gabriel M. Pinto, Josue M. O. Cremonezzi, Helio Ribeiro, Ricardo J. E. Andrade, Nicole R. Demarquette, Guilhermino J. M. Fechine
Summary: 2D materials are increasingly used as additives in polymer composites due to their versatile properties. This paper reviews the most commonly used 2D materials, synthesis techniques, and mixing routes in polymer nanocomposites, as well as the sought-after properties and morphology evolution. The challenges and strategies to overcome them, such as the development of hybrid 2D nanostructures, are highlighted. The paper concludes with a perspective on the development of these emerging multifunctional nanocomposites and the necessary steps for their wide application in daily life.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Chaofan Zhou, Jinghang Wang, Hewen Liu
Summary: In this study, a ferrocene tethered cyclopolymer was synthesized and shown to form 2D crystalline layers on the surface. The crystallization process follows a nonclassic pathway and the 2D crystalline phase is more stable at room temperature than the 3D phase.
Article
Chemistry, Physical
Yeye Wang, Guoqiang Liu, Youfa Liu, Jiaji Yang, Peipei Liu, Qinglin Jiang, Fengxing Jiang, Congcong Liu, Wenjun Ding, Jingkun Xu
Summary: This study explores the impact of structural regulation on the capacitive performance by compositing a high-conductivity CP (PEDOT:PSS) with multi-dimensional carbon materials (0D C-60, 1D SWCNT, and 2D rGO). The composite films show improved capacitance performance, with the PEDOT:PSS/rGO film revealing significantly enhanced specific capacitance value and rate capability. This research provides valuable insights for the design and optimization of CP-based composites for supercapacitors.
APPLIED SURFACE SCIENCE
(2021)
Review
Materials Science, Multidisciplinary
Amal Megdich, Mohamed Habibi, Luc Laperriere
Summary: The global energy and environmental pollution crisis is caused by increased usage of non-renewable energy sources. Researchers are exploring alternative energy systems to harvest ambient energy. Piezoelectric energy harvesting devices have been investigated for over two decades as a viable alternative for small electronic devices. The properties of piezoelectric materials and 3D printing technology significantly impact their performance and applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Review
Materials Science, Multidisciplinary
Yong-tao Gao, Tian-hua Wu, Yu Zhou
Summary: This review thoroughly discusses the application and development of three-dimensional printing technology in the field of rock mechanics, as well as the differences in mechanical performance of specimens printed with different materials, indicating the great potential of 3DP technology in the field of rock mechanics.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Construction & Building Technology
Pattharaphon Chindasiriphan, Hiroshi Yokota, Yuichiro Kawabata, Paponpat Pimpakan
Summary: This study investigates the combined effect of rice husk ash (RHA) and superabsorbent polymer (SAP) on the self-healing capability of mortar with cracks. The combination of RHA and SAP enhances the self-healing performance compared to the system only with RHA. The study finds that RHA-based systems have lower self-healing performance in terms of crack closure than fly ash-based systems, but the self-healing performance of RHA-based systems is effectively improved with the combination of SAP.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Luwei Zhang, Ning Wang, Yuliang Li
Summary: This review summarizes recent research achievements on molecular structure modification, aggregation regulation, characteristic properties, and device applications of two-dimensional materials. The intrinsic correlation between preparation methods and characteristic properties is investigated, and the design strategies to fabricate functional 2D materials starting from precursor molecules are introduced in detail.
Article
Engineering, Multidisciplinary
Tatsuyuki Inoue, Toru Kizaki, Naohiko Sugita
Summary: A machine tool structural component with a large-scale array of temperature sensors interconnected in series is proposed to achieve accurate thermal error compensation. Experimental comparisons indicate that thermal deformations can be predicted more accurately in the structure made with the proposed composite material compared to conventional materials.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Lohitha R. Hegde, Baishakhi Tikader, Aswin T. Srivatsav, Sandip Kar, Kamendra P. Sharma
Summary: By utilizing the elastic property of materials, the rate of in situ reactions can be enhanced efficiently and dynamically controlled through compression-decompression cycles. The formation of reaction products can be increased by varying the cycle frequency. A numerical method can predict and design enzyme-mimicking materials based on their efficiency and applications.
CHEMISTRY OF MATERIALS
(2022)
Article
Engineering, Manufacturing
Minhao Guo, Yufan Zhang, Chun Huang, Xu Zhao, Xiu-Ping Yan, Yunpeng Huang, Le Li, Tianxi Liu
Summary: This study successfully developed a novel shape memory polyimide aerogel composite with a high programming temperature and excellent shape recovery capability. By regulating molecular interactions and pore structures, the desired thermo-mechanical performances were achieved, showing great potential for widespread applications in harsh environments.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
N. Forintos, T. Sarkadi, T. Czigany
Summary: Electric measurements of carbon fiber-reinforced composites can be used to detect and measure overload conditions, with the resistance of the carbon fiber increasing until it breaks; cyclic testing shows that overload exceeding reversible deformation can be detected by examining the first derivative of the resistance change.
COMPOSITES COMMUNICATIONS
(2021)
Article
Hospitality, Leisure, Sport & Tourism
Lingling Fan, Chaowu Xie, Jiangchi Zhang, Songshan Sam Huang, Xuequn Alex Wang
Summary: This study identifies the dimensions of Hotel Digital Capability (HDC) and constructs a reliable measurement scale, using a combined approach of qualitative and quantitative methods. The developed scale lays the groundwork for future investigations into digital capability and transformation within the hotel industry.
JOURNAL OF HOSPITALITY AND TOURISM MANAGEMENT
(2023)
Article
Construction & Building Technology
Anne Linde van Overmeir, Branko Savija, Freek P. Bos, Erik Schlangen
Summary: This paper evaluates the effect of each successive phase of the printing process on the mechanical properties of strain-hardening cementitious composites (SHCC). The results indicate that flexural and tensile strength, as well as their associated deflection and strain, are strongly affected by the printing process, while density and compressive strength are not significantly influenced. Additionally, the pumping phase is identified as the primary phase influencing the mechanical properties during the printing process.
Review
Polymer Science
Ziyang Zhang, Jigang Du, Jiaxu Li, Xiaodong Huang, Ting Kang, Chi Zhang, Song Wang, Olayemi Oluwatosin Ajao, Wen-Jun Wang, Pingwei Liu
Summary: The use of nanomaterials with exotic properties to reinforce polymers promises high-performance composite materials. Emerging trends in 2D nanotechnology may lead to major advancements in polymer nanocomposites, but challenges such as controlling nanomaterial dispersion still exist.
PROGRESS IN POLYMER SCIENCE
(2021)
Article
Engineering, Mechanical
Khalil Mustafa Abdulkarem Algunaid, Jichang Liu
Summary: This study proposes a system framework to organise, manage, and evaluate 3D printing services in the cloud, and assist users in selecting the best service based on their application requirements. Users can personalise their selection based on performance capabilities and trust, and the system dynamically updates service providers' trust based on customer feedback.
RAPID PROTOTYPING JOURNAL
(2023)
Article
Polymer Science
Reema H. Alasfar, Viktor Kochkodan, Said Ahzi, Nicolas Barth, Muammer Koc
Summary: This study prepared polysulfone (PSF) membranes with different loadings of cellulose nanofibers (CNFs) using the phase inversion method and investigated the pore morphology, mechanical properties, membrane performance, and hydrophilicity. The results showed that the addition of CNFs improved the mechanical properties, water fluxes, and hydrophilicity of the membranes. The optimal loading of 0.3 wt.% CNF enhanced the elastic modulus, yield stress, and resistance to compaction. CNFs were found to be homogeneously dispersed within the PSF matrix at CNF loading less than 0.5 wt.%.
Article
Energy & Fuels
Omer Abedrabboh, Muammer Koc, Yusuf Bicer
Summary: Global warming increases the demand for cooling in indoor spaces, and reducing energy consumption and carbon emissions of cooling systems has become a crucial challenge. This study compares different cooling cycles and evaluates their sustainability performance through the development of an index. Vapor-compression cycles combined with emerging technologies achieve high sustainability scores.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Chemistry, Physical
Dawood Hjeij, Yusuf Bicer, Muammer Koc
Summary: A hybrid renewable-based integrated energy system for power-to-X conversion is designed and analyzed, producing hydrogen, electricity, heat, ammonia, urea, and synthetic natural gas (SNG). The system utilizes solid oxide electrolyzers and fuel cells to produce and store hydrogen for power generation from solar energy. Ammonia, urea, and synthetic natural gas are produced as energy carriers or valuable chemical products. The system's energy efficiency is 56%, while the exergy efficiency is 14%, with the highest exergy destruction occurring in the Rankine cycle. The mass flow rates of the produced chemicals are 0.064, 0.088, and 0.048 kg/s for ammonia, urea, and SNG, respectively.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Polymer Science
Ans Al Rashid, Muammer Koc
Summary: This study develops a computational modeling for predicting the issues in the manufacturing process of 3D printed polymer composites using a numerical simulation tool. The study finds that different infill patterns and densities have a significant impact on deflections, residual stresses, and warpage. Furthermore, the numerical simulation results are validated and compared with physical testing, showing a satisfactory agreement.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Mariem Fekih Zguir, Sana Dubis, Muammer Koc
Summary: This study investigates the perceptions and challenges faced by Grade 8 teachers in Qatar regarding the integration of Education for Sustainable Development (ESD). The findings highlight the need for a holistic and integrated embedding of sustainability values, as well as better alignment between education policies and classroom practices. The study also reveals that teachers' perceptions vary based on their subject of teaching and their schools' involvement in ESD initiatives.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Namra Mir, Shoukat Alim Khan, Anil Kul, Oguzhan Sahin, Emircan Ozcelikci, Mustafa Sahmaran, Muammer Koc
Summary: Recycling construction and demolition waste (CDW) to produce green construction materials is essential for decarbonizing the built environment. The study focuses on the life cycle assessment (LCA) of CDW-based self-healing geopolymers, aiming to optimize the environmental implications of the production process and product. The developed geopolymer binder can replace ordinary Portland cement (OPC) in conventional concrete to mitigate its significant global warming impacts.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Ramsha Imran, Ans Al Rashid, Muammer Koc
Summary: Bone tissue engineering is a promising field for bone defect treatment. This study focuses on the simulation of 3D-printed polymeric porous scaffolds using different materials and unit cell designs. The results provide insights into manufacturing constraints and scaffold quality, laying the foundation for future experimental validation and biomechanical performance studies.
Article
Green & Sustainable Science & Technology
Mohammad I. I. Al-Housani, Muammer Koc, Mohammed S. S. Al-Sada
Summary: This paper presents a comprehensive and comparative investigation into the needs, challenges, and potential roles for entrepreneurship in transforming resource-rich countries into sustainable economies. It focuses on the case of Qatar, considering its current policies, mechanisms, and institutes, and how they are working together to help diversify the economy. The study identifies three barriers in the entrepreneurship ecosystem in Qatar: lack of a conducive legal environment, lack of access to risk-based financing, and lack of locally relevant entrepreneurial mentorship and guidance. The authors develop a preliminary framework based on the literature review and interview results to increase the number of entrepreneurs and small businesses for economic growth and diversification.
Article
Engineering, Chemical
Shoukat Alim Khan, Muammer Koc
Summary: The study aims to analyze the impact of different geometrical designs and printing factors on the buildability performance of 3D concrete printing structures. The Design of Experiment (DOE) method is used to reduce the number of simulations. The study finds that the structure's design is the most sensitive parameter, followed by the width and length of the printed design. Moving from sharp corners to more stable structures like fillets and circular geometry improves buildability. The study also proposes new printing strategies to enhance overall performance.
Article
Green & Sustainable Science & Technology
Muhammad Usman Sajid, Shoukat Alim Khan, Muammer Koc, Sami G. Al-Ghamdi, Yusuf Bicer
Summary: This study conducted a comprehensive life cycle assessment of conventional and spectra-managed greenhouses designed for hot and arid climates. The novel roof greenhouse integrated photovoltaics and dielectric mirrors for solar spectrum optimization, while the nanofluid roof greenhouse used spectrum-selective nanofluid for sustainable cooling. The life cycle impact assessment showed that the novel roof greenhouse could significantly reduce environmental impacts compared to the conventional greenhouse.
CLEANER ENVIRONMENTAL SYSTEMS
(2023)
Article
Chemistry, Physical
Fawad Ali, Ans Al Rashid, Sumama Nuthana Kalva, Muammer Koc
Summary: Magnesium/polylactic acid composites show promise for bone tissue engineering applications. The addition of magnesium significantly impacts the thermal and structural properties of polylactic acid and increases its degradation. The composite material can be used for direct ink writing in 3D printing, but more research is needed to improve the rheological properties of the ink.
Review
Green & Sustainable Science & Technology
Shouq Al-Qahtani, Muammer Koc, Rima J. Isaifan
Summary: This research evaluates the use of mycelium-based thermal insulation as an unconventional and innovative solution to reduce cooling energy consumption and carbon footprint in arid and hot climate regions. The study finds that mycelium exhibits exceptional thermal and acoustic insulation properties and shows promise in improving indoor temperature regulation and air quality, as well as actively degrading pollutants in soil and water.
Article
Geosciences, Multidisciplinary
Shoukat Alim Khan, Ans Al Rashid, Muammer Koc
Summary: Climate change has already had an impact on various aspects of global life. Prioritizing resources and capacity, small and vulnerable coastal area (SVCA) countries should focus on developing and implementing immediate, tailored, adaptive response policies and actions. Long-term mitigation efforts are not sufficient for reducing vulnerability in the short-term.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2023)
Review
Polymer Science
Fawad Ali, Muammer Koc
Summary: Three-dimensional (3D) printing is a promising manufacturing platform in biomedical engineering. Polymer piezoelectric materials, with their controllable and reproducible properties, have opened new possibilities for integration into biomedical fields such as sensors, drug delivery systems, and tissue engineering.
Article
Polymer Science
Reema H. Alasfar, Muammer Koc, Viktor Kochkodan, Said Ahzi, Nicolas Barth
Summary: In this study, the elastic modulus of polymeric membranes was optimized using DOE with computational modeling and validated with experiments. The predicted results showed that the combination of 0.3 wt.% halloysite nanotubes (HNTs) reinforced polyether sulfone (PES) membrane was the best choice.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)