Article
Materials Science, Characterization & Testing
Jie Fan, Jiping Yang, Hong Li, Junpeng Tian, Meng Wang, Yunfeng Zhao
Summary: The study showed that as the oxidation degree of graphene oxide increased, it exhibited better dispersion in the matrix and improved interfacial interactions with epoxy resin, leading to enhanced mechanical properties of the nanocomposites. The tensile properties of the GO/epoxy nanocomposites at room temperature and liquid nitrogen temperature increased with the GO oxidation degree, reaching the highest performance at an appropriate oxidation degree. The toughening mechanisms of GO for epoxy nanocomposites at room temperature and liquid nitrogen temperature were analyzed and showed significant differences.
Article
Materials Science, Composites
Guorui Yang, Yan Ma, Chen Liu, Lanyue Zhang, Xiangwei Li, Weifeng Du, Lei Shang, Yuhui Ao
Summary: Inspired by the strengthening effect of nanoparticles and the toughening effect of block polymers, a block polymer filler with graphene oxide (GO) was prepared, which significantly improved the mechanical properties of epoxy composites. The combination of GO and side groups promoted dispersion and toughening. This research has potential application value in the field of resin fillers and in combination with other materials.
POLYMER COMPOSITES
(2022)
Article
Chemistry, Physical
Jie Fan, Zhijian Wang, Jiping Yang, Xiaobo Yin, Yunfeng Zhao
Summary: Inspired by the structure of nacre, researchers constructed a rigid-and-soft multilayer interphase between functionalized graphene oxide (GO) and an epoxy matrix. The nanocomposites with three layers of PDA/D230 on modified GO showed the highest mechanical properties, with an increase of 25.8% in tensile strength at room temperature and 13.0% in elongation at break.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Sheikh Rehman, Julio Gomez, Elvira Villaro, Dwane Cossey, Panagiotis G. Karagiannidis
Summary: In this study, nanocomposites with a biobased epoxy/amine matrix reinforced with reduced graphene oxide (rGO) or functionalised with 3-glycidoxypropyltrimethoxysilane (GLYMO-rGO) were synthesized and investigated. It was found that the addition of GLYMO-rGO improved the degree of cure and mechanical properties, resulting in increased glass transition temperature, Young's modulus, and tensile strength. Furthermore, it was demonstrated that the nanocomposite system could be used as a matrix for carbon fiber reinforced polymer (CFRP) laminates and as an adhesive for bonding CFRP/CFRP and CFRP/aluminium joints.
Article
Chemistry, Physical
Jie Fan, Jiping Yang, Letian Wang, Hong Li, Junpeng Tian, Jinrui Ye, Yunfeng Zhao
Summary: Different methods of surface functionalization of graphene oxide with varying amine grafting densities were studied in this research to prepare corresponding nanocomposites. It was found that graphene oxide functionalized with m-xylylenediamine showed better enhancement of mechanical properties in epoxy resin compared to graphene oxide functionalized with polyetheramine D230. However, nanocomposites modified with graphene oxide with improved amine grafting density did not exhibit the expected enhancement in mechanical properties as revealed by molecular dynamics simulations.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Amr Osman, Abdelmoty Elhakeem, Saleh Kaytbay, Abdalla Ahmed
Summary: By dispersing reduced graphene oxide (RGO) and alumina into the epoxy matrix at different hybrid ratios, the synergy of RGO and alumina at 6:4 was found to enhance thermal conductivity by 23.4%, retain insulation properties, increase tensile strength, and improve storage modulus. The settling of alumina nanoparticles on the graphene surface inhibits electron transfer and eliminates graphene agglomerations, making it an important study for designing optimal multi-functional polymeric packaging materials.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Lubomir Lapcik, Harun Sepetcioglu, Yousef Murtaja, Barbora Lapcikova, Martin Vasina, Martin Ovsik, Michal Stanek, Shweta Gautam
Summary: This article compares the mechanical properties of epoxy/graphene and epoxy/halloysite nanocomposites. Different concentrations of graphene nanoplatelets (GnPs) and halloysite nanotubes (HNTs) were used as fillers in the epoxy resin matrices. The results showed increased ductility and plasticity in the GnP nanocomposite samples, while the epoxy/HNT nanocomposites exhibited decreased mechanical stiffness. The complexity of the mechanical response in the investigated nanocomposites was confirmed as a combination of ductile and brittle phenomena.
NANOTECHNOLOGY REVIEWS
(2023)
Article
Engineering, Biomedical
Bableen Flora, Rohit Kumar, Preeti Tiwari, Akhilesh Kumar, Janne Ruokolainen, Ashwin Kumar Narasimhan, Kavindra Kumar Kesari, Piyush Kumar Gupta, Anjuvan Singh
Summary: A successful attempt was made to improve the mechanical properties of Hydroxyapatite (HAp) and reduced graphene oxide (rGO) composite nanoparticles (NPs). Different proportions of HAp and rGO were synthesized to enhance the mechanical properties. The HAp NPs were prepared using the wet precipitation method and calcination, while the rGO-HA composites were prepared through ball milling. The strength of the variants significantly increased with the concentration of rGO, while the porosity also increased.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Amish Kumar Gautam, Mohd Faraz, Neeraj Khare
Summary: This article synthesized tungsten oxide nanoparticles and tungsten oxide-reduced graphene oxide nanocomposites, and studied their thermoelectric properties. The results showed that the thermoelectric material figure of merit of WO3-rGO nanocomposites increased by 8.8 times at 313K, with significantly enhanced electrical conductivity and reduced thermal conductivity compared to WO3 nanoparticles.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Applied
Felipe da S. Medeiros, Camila S. R. Cury, Claudia K. B. de Vasconcelos, Glaura G. Silva
Summary: This study improved the performance of fusion-bonded epoxy coatings by adding graphene, enhancing adhesion and reducing indentation. The combination of graphene nanofillers with other fillers resulted in improved overall properties of the coatings.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Composites
Ertan Kosedag, Recep Ekici, Nail Yildiz, Umut Caliskan
Summary: This study investigates the mechanical properties of carbon fiber reinforced epoxy composites filled with Graphene (Gr) and Silicon Carbide (SiC) nanoparticles. Tensile, compression, and three point bending tests were performed to determine the effects of additive type and weight ratios. The results show that CFRECs with Gr additive exhibit improved tensile properties compared to the unfilled composites, especially at higher filler contents and specific fiber orientations.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Srinivasan Shanmugam, Omkumar Meenakshisundaram
Summary: This study focuses on the preparation and fabrication of graphene hybrid fiber-reinforced polymer composites and investigates the effect of graphene on the microhardness and wear behavior of the composites. The addition of graphene significantly improves the thermal stability, microhardness, and tribological performance of the composites. Surface features were examined using a scanning electron microscope, and the results show that the inclusion of 0.6 wt% graphene decreases the friction coefficient by 35% and reduces the wear rate under abrasive conditions. The use of graphene in wear-resistant materials and high-performance applications in automotive and aerospace industries shows promising potential.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Xueqin Yang, Yifan Zhang, Jiamei Luo, Rogers Tusiime, Chengzhi Lu, Yi Xue, Jinli Zhou, Yong Liu, Hui Zhang, Jianyong Yu
Summary: In this work, Fe3O4@anisotropic reduced graphene oxide aerogel/epoxy (Fe3O4@AGA/EP) nanocomposites were successfully fabricated, showing outstanding electromagnetic interference (EMI) shielding performance and mechanical properties. The Fe3O4@AGA/EP nanocomposites were obtained by one-step hydrothermal reduction method and unidirectional freezing approach to prevent the agglomeration of Fe3O4 and graphene oxide (GO). The research provides a potential solution for the development of EP-based composites with high EMI shielding performance and mechanical properties.
COMPOSITES COMMUNICATIONS
(2022)
Article
Construction & Building Technology
Lingbo Yu, Shuai Bai, Xinchun Guan
Summary: The purpose of this study is to investigate the impact of graphene oxide-silica nanocomposites on the mechanical properties, transport properties and microstructure of mortar, and to understand the mechanism by which GO-nanoSiO2 improves the properties of mortar. The results showed that adding 0.05 wt% GO effectively enhanced the compressive strength, fracture toughness and chloride penetration resistance of mortar. The addition of GO-nanoSiO2 also resulted in improved pore structure and reduced porosity, leading to improved impermeability. In the interface transition zone between aggregate and matrix, the presence of GO-nanoSiO2 inhibited crack propagation and improved the macroscopic fracture properties of mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Polymer Science
Kakur Naresh, Kamran A. Khan, Rehan Umer
Summary: This study investigated the effects of different graphene oxide concentrations on the mechanical and thermal properties of epoxy, proposing analytical models to predict Young's modulus and thermal conductivity. The 0.2 wt% nanocomposite samples showed relatively high storage modulus, heat-resistance index, and thermal conductivity compared to pure epoxy and lower concentration GO nanocomposites, indicating higher thermal stability.
Article
Multidisciplinary Sciences
Yasser Zare, Kyong Yop Rhee, Soo-Jin Park
Summary: This study presents a power equation for the conductivity of graphene-based polymer composites based on the tunneling length, interphase deepness, and filler size. The study also explores the impact of these factors on the effective concentration and percolation beginning of graphene nano-sheets in nanocomposites. The developed equations are validated using experimental data and provide estimations for interphase depth, tunneling size, and percolation exponent.
SCIENTIFIC REPORTS
(2023)
Review
Chemistry, Multidisciplinary
Gunendra Prasad Ojha, Gun Woong Kang, Yun-Su Kuk, Ye Eun Hwang, Oh Hoon Kwon, Bishweshwar Pant, Jiwan Acharya, Yong Wan Park, Mira Park
Summary: Silicon carbide (SiC) is a highly promising carbide material known for its applications in electrochemical supercapacitors, photocatalysis, microwave absorption, field-effect transistors, and sensors. It offers advantages such as high thermal stability, chemical stability, thermal conductivity, and mechanical behavior, making it a potential candidate in various fields. This review focuses on the synthesis techniques and properties of nanostructured SiC (0D, 1D, 2D, and 3D), as well as the current research trends in electrochemical supercapacitor electrodes. The review also highlights future research directions, key obstacles, and possible solutions.
Article
Chemistry, Multidisciplinary
Won-Jong Choi, Seul-Yi Lee, Soo-Jin Park
Summary: By using ambient plasma treatment, boron nitride nanosheets (BNNS) can be prepared as fillers in epoxy nanocomposites with high thermal conductivity and fracture toughness.
Article
Multidisciplinary Sciences
Mostafa Vatani, Yasser Zare, Nima Gharib, Kyong Yop Rhee, Soo-Jin Park
Summary: This article introduces a novel model for predicting the efficient conductivity of graphene-polymer systems. Simple equations are used to determine the percolation start, the share of graphene and interphase pieces in the nets. The resistances of tunneling and interphase parts are correlated to graphene conductivity. Experimental data analysis and calculations validate the correctness of the model.
SCIENTIFIC REPORTS
(2023)
Review
Nanoscience & Nanotechnology
Srikanta Palei, G. Murali, Choong-Hee Kim, Insik In, Seul-Yi Lee, Soo-Jin Park
Summary: Perovskite solar cells (PSCs) with a power conversion efficiency of 25.7%, close to the Shockley-Queisser limit, are considered a strong candidate for next-generation energy harvesting. However, stability and reliability issues pose challenges for commercialization. MXenes, as two-dimensional materials, show promise in solar cell applications due to their conductivity, mobility, transparency, tunable work function, and mechanical properties. By using MXenes in different components, PSCs can achieve enhanced conductivity and stability.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jong-Hoon Lee, Seul-Yi Lee, Soo-Jin Park
Summary: In recent years, porous carbon materials have been developed for supercapacitor applications. Carbon aerogels with three-dimensional porous networks are promising for electrochemical energy storage. Physical activation using gaseous carbon dioxide provides controllable and eco-friendly processes, while chemical activation produces wastes. The activated carbon aerogels achieved a high specific surface area and large total pore volumes, leading to a high electrical double-layer capacitance. The specific gravimetric capacitance reached up to 89.1 F g(-1) with a high capacitance retention of 93.2% after 3000 cycles.
Review
Chemistry, Multidisciplinary
Anup Bist, Bishweshwar Pant, Gunendra Prasad Ojha, Jiwan Acharya, Mira Park, Prem Singh Saud
Summary: Solar energy is the superior choice for clean and green energy generation to replace fossil fuels and restore the environment. Perovskite solar cells, a new type of energy-harvesting solar cell, are scalable, flexible, cost-efficient, environmentally benign, and easy to fabricate, making them highly attractive worldwide.
Article
Chemistry, Multidisciplinary
Seul-Yi Lee, Yeong-Hun Kim, Roop L. Mahajan, Soo-Jin Park
Summary: In this study, a novel approach to determine the London dispersive components of the surface free energy of ACFs was proposed using inverse gas chromatography. The results showed that our method provides more accurate and reliable values compared to the traditional method, making it a valuable tool for designing interface engineering in adsorption-related applications.
Review
Pharmacology & Pharmacy
Bishweshwar Pant, Mira Park, Allison A. Kim
Summary: Dural defects are a common problem in neurosurgical procedures and various types of dural substitutes, including electrospun nanofibers, have been used for their repair. This review summarizes the investigation and development of electrospun nanofibers for dura mater regeneration, highlighting their interesting properties and current limitations. The objective is to provide readers with a quick overview of recent advances in electrospinning for dura mater repair.
Article
Chemistry, Physical
Yasser Zare, Kyong Yop Rhee, Soo-Jin Park
Summary: The effects of Lc on the depth of the operative interphase, operative filler concentration, and mechanical percolation start are studied. An equation is proposed to determine the strength of HNT composites with an imperfect interphase and an HNT network. The relationships between B and Lc, HNT size, and percolation start are analyzed. The lowest Lc, lowest percolation start point, slimmest and longest HNTs, and highest interfacial shear strength yielded the highest B values and the toughest samples.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Applied
Junhyung Park, Soo-Jin Park, Seok Kim
Summary: To improve the electrochemical performance of Li-S batteries, sulfur composites are prepared through melt-diffusion of sulfur into porous materials such as MOFs. The effect of reactant concentration on particle size distribution of ZIF-67 is studied, and the performance of the product as a sulfur host for Li-S battery cathode is evaluated.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Miyeon Shin, Ganesh Prasad Awasthi, Krishna Prasad Sharma, Puran Pandey, Mira Park, Gunendra Prasad Ojha, Changho Yu
Summary: Three-dimensional carbon nanofiber-supported hollow copper sulfide spheres were synthesized and exhibited promising potential as electrode material for supercapacitor applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Chemistry, Analytical
Bishweshwar Pant, Mira Park, Allison A. Kim
Summary: Recently MXenes have been investigated as a promising class of two-dimensional materials with unique layered microstructure, various functional groups, and attractive properties. MXene-polymer nanocomposites have great potential in biomedical applications due to their easy dispersibility and metallic conductivity. However, the interaction between polymeric nanofibers and MXenes needs further exploration.
Review
Chemistry, Multidisciplinary
Seong-Hwang Kim, Seul-Yi Lee, Yali Zhang, Soo-Jin Park, Junwei Gu
Summary: This review provides a comprehensive overview of stealth technology and radar absorbing materials (RAMs), with a particular focus on carbon-based materials. It discusses the history and basic concepts of stealth technology and RAMs, and explores recent advancements and strategies in carbon-based RAMs for electromagnetic attenuation. The review highlights the potential of carbon-based RAMs for practical applications and emphasizes the need for further research to enhance their performance.
Article
Chemistry, Multidisciplinary
Choong-Hee Kim, Seul-Yi Lee, Soo-Jin Park
Summary: This study successfully prepared activated carbons using coffee grounds and potassium oxalate as a biomass precursor and an activating reagent. The activated carbons showed high CO2 adsorption capacity due to their high microporosity, demonstrating the potential for eco-friendly CO2 capture with energy efficiency and mass production.
