Article
Materials Science, Composites
S. S. Vinay, M. R. Sanjay, Suchart Siengchin, C. V. Venkatesh
Summary: The addition of Al2O3 nanofillers in basalt/epoxy laminate composites has significant effects on mechanical, wear, and hardness characteristics, with improvements in flexural strength and ILSS but reductions in tensile strength. Wear tests show a decrease in wear loss with increasing percentage of fillers.
POLYMER COMPOSITES
(2021)
Article
Engineering, Environmental
Yu Xu, Wen-Jie Yang, Qian-Kun Zhou, Tian-Yu Gao, Guo-Mei Xu, Qi-Long Tai, San-E Zhu, Hong-Dian Lu, Richard K. K. Yuen, Wei Yang, Chun-Xiang Wei
Summary: In this study, a highly functional bio-based flame retardant DPOR was successfully synthesized and added into epoxy resins, leading to excellent flame-retardant and mechanical properties. It shows great potential for future applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Kyung-Min Kim, Hoon Kim, Hyun-Joong Kim
Summary: The thermal and mechanical properties of epoxy/fumed silica composite can be improved by different surface treatments of fumed silica. The addition of silica nanoparticles enhances the thermal stability and flexural strength of the composite, making it commercially promising.
Article
Construction & Building Technology
Dilshad Ali, Rachit Agarwal, Mohd Hanifa, Pradeep Rawat, Rakesh Paswan, Devendra Rai, Inderjeet Tyagi, B. Srinivasarao Naik, Ashish Pippal
Summary: Biochar made from different percentages of sawdust was used to replace cement in cementitious materials, resulting in reduced environmental pollutants and landfill waste. Through various tests, it was found that the addition of biochar improved the hydration products, compressive strength, and thermal properties of the cementitious compounds. The 3 wt% replacement showed the best performance among the three different replacements.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Subhankar Das, Sudipta Halder, Bappi Paul, Nazrul Islam Khan, M. S. Goyat
Summary: Graphene oxide (GO) or reduced graphene oxides (RGO) have shown great potential as reinforcements in epoxy composites for enhancing their mechanical and thermal properties. However, the preparation of GO and RGO is challenging. This study proposes the use of milled graphite nanoparticles (GrNPs) as an alternative reinforcement due to their porous structure and ease of oxidation. The use of economical silanized milled GrNPs significantly improves the thermo-mechanical behavior of the epoxy nanocomposites without sacrificing other important properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Yalin Zhang, Xuzhao He, Miao Cao, Xiaojun Shen, Yaru Yang, Jie Yi, Jipeng Guan, Jianxiang Shen, Man Xi, Yuanjie Zhang, Bolin Tang
Summary: The study focused on the effect of TiO2/Ti3C2 composite particles with unique micro-nano morphology on the tribological and thermo-mechanical properties of epoxy resin. The results showed that the introduction of TiO2/Ti3C2 can effectively improve the wear rate of epoxy resin, with the medium density TiO2/Ti3C2 nanocomposites exhibiting the lowest wear rate. Additionally, the incorporation of TiO2/Ti3C2 also led to enhanced storage modulus and glass transition temperature of the epoxy resin.
Article
Nanoscience & Nanotechnology
Ping Tang, Zijian Zhang, Chenxin Guo, Shaohua Zeng, Pengpeng Chen, Ying Xu, Wangyan Nie, Yifeng Zhou
Summary: Carbon nanotubes have great potential for use in microelectronic packaging due to their excellent thermal conductivities. However, their high electroconductibility and poor radial conductivity limit their application in insulating materials. In this study, a heterostructured brushlike hybrid was prepared by anchoring amine-functionalized multiwalled carbon nanotubes onto insulating montmorillonite. The resulting composites exhibited improved thermal conductivity, mechanical properties, and thermal stability, providing a promising strategy for fabricating polymer composites.
ACS APPLIED NANO MATERIALS
(2022)
Article
Polymer Science
Madalina Ioana Necolau, Celina Maria Damian, Elena Olaret, Horia Iovu, Brindusa Balanuca
Summary: This study investigates the properties of bio-based polymeric matrices obtained by crosslinking epoxidized linseed oil (ELO) with different activators. The results show that ELO_CA material, formed by using citric acid and THF as activators, exhibits higher thermal stability and glass transition temperature. Additionally, the crosslink density, storage modulus, mechanical properties, and water affinity of these materials are discussed.
Article
Materials Science, Composites
J. Yusuf, S. M. Sapuan, Umer Rashid, R. A. Ilyas, M. R. Hassan
Summary: The efficient inclusion of GNPs as nano-fillers in green polymer matrices produced from biomass carbon significantly improves mechanical and thermal properties. The study successfully dispersed GNPs in green epoxy using a solution blending technique and ultrasonic bath, resulting in nanocomposites with optimal dispersion. The addition of low wt% of GNPs also enhanced the thermal stability and mechanical performance of the green nanocomposites.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Patcharapon Somdee, Manauwar Ali Ansari, Kalman Marossy
Summary: In this study, flexible and rigid polyurethane/copper composites were prepared via a simple solution casting process. The dispersion and chemical bonding of the filler were investigated, and the thermal properties and mechanical properties of the composites were analyzed. The results showed that the thermal conductivity of the composites was significantly improved compared to the pure polyurethane, and the mechanical properties were also enhanced. The study suggests that copper microparticles can serve as an active filler in both flexible and rigid polyurethane matrices.
POLYMER COMPOSITES
(2023)
Article
Engineering, Chemical
Zahra Haeri, Mohammad Ramezanzadeh, Bahram Ramezanzadeh
Summary: In this research, GO/Ce-TA MOF was developed for the first time to enhance the mechanical properties of the epoxy matrix, improving the mechanical and thermal stability of the coatings. The high uniform dispersion and toughening properties of Ce-TA MOF particles in the epoxy matrix were validated in the experiments.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Materials Science, Composites
Mikhail V. Burkov, Alexander V. Eremin
Summary: This study investigated the effects of adding milled carbon fibers and single-wall carbon nanotubes on the mechanical and physical properties of carbon-fiber-reinforced polymers. It was found that single-wall carbon nanotubes significantly improved static strength and fatigue performance, while milled carbon fibers enhanced properties under static loading but negatively impacted fatigue properties.
POLYMER COMPOSITES
(2021)
Article
Thermodynamics
Xiaocheng Han, Wufeng Su, Jie Gong, Zhonghua Xi, Junsheng Zhang, Jun Cai, Qingjun Wang, Hongfeng Xie
Summary: The study found that introducing asphaltene fillers into epoxy resin affects the material properties, such as increasing viscosity, enhancing Young's modulus, and storage modulus. With an increase in asphaltene content, aggregation and network structures appear in the microstructure, while there is minimal impact on glass transition temperature, damping properties, and thermal stability.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Multidisciplinary
Jiacheng Zhang, Zi Wang, Guoqing Jiang, Huachao Wei, Zongxi Zhang, Junwen Ren
Summary: The demand for high-performance dielectrics has increased due to the rapid development of modern electric power and electronic technology. In this study, a multifunctional nanocomposite material, which is a blend of fluorinated graphene and epoxy resin, was fabricated. The composite exhibited enhanced thermal conductivity, high breakdown strength, high dielectric constant, low dielectric loss, low AC conductivity, high thermal stability, and strong mechanical strength, making it suitable for the development and manufacturing of advanced electric power and electronic equipment devices.
Article
Polymer Science
Hyeon-Ju Ryu, Nguyen Thu Hang, Sanoj N. Rejinold, Byeongmoon Jeong, Goeun Choi, Jin-Ho Choy
Summary: Nanocomposites of hydrophobic organo-clay/polypropylene were efficiently developed through a solution-blending technique. Among the various clays used, CTA-Mica showed the best improvement in both thermal stability and mechanical properties of the PP nanocomposites compared to CTA-Mt and CTA-Ht.
Article
Polymer Science
Ravindra Kumar, Kamal K. Kar, Kinshuk Dasgupta
Summary: The study demonstrated that carbon nanotube coatings significantly improved the mechanical and electrical properties of carbon textile-phenolic composites, with the best results obtained with a 15-minute coating time. The coatings effectively enhanced the performance of carbon fibers and are suitable for high-performance thermo-structural applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Chemical
Manishkumar D. Yadav, Kinshuk Dasgupta
Summary: The kinetics of formation of carbon nanotube aerogel (CNT-a) by thermocatalytic decomposition of ethanol using ferrocene and thiophene as catalyst and promoter has been studied. It was found that the irreversible dissociation of adsorbed ethanol followed by the decomposition of adsorbed ethyl group is the rate limiting step for the formation of CNT-a. Additionally, the atomic ratios of Fe/S and Fe/C were found to have profound effects on the type of carbon nanotubes present in CNT-a.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Janardhan Rao Gadde, Anasuya Karmakar, Tuhin Kumar Maji, Subhrajit Mukherjee, Rajath Alexander, Anjanashree M. R. Sharma, Sarthak Das, Anirban Mandal, Kinshuk Dasgupta, Akshay Naik, Kausik Majumdar, Ranjit Hawaldar, K. Adarsh, Samit Kumar Ray, Debjani Karmakar
Summary: This paper investigates the structure of ReS2 and its thickness-dependent optical response through first-principles calculations and experimental analysis. The results show a correlation between optical and electronic properties, with sulfur vacancy-induced mid-gap states enhancing exciton lifetimes in the films. The ion gel top-gated photodetectors fabricated from the CVD films exhibit high photo-response and detectivity, demonstrating the potential applications of vertically grown large-area films in optics and opto-electronics.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Priyanka Biswas, Debasis Sen, Meenu Prasher, Sudip Kumar Sarkar, Kinshuk Dasgupta
Summary: In this study, well-defined powder micro-granules with interstitial nanopores were achieved through one-step evaporative jamming of colloidal silica particles in contact-free spray droplets. The anomalous freezing behavior of confined water in these microspheres synthesized using spray drying was investigated, revealing a significant lowering of the freezing point to around -45 degrees C due to the confinement effect. The results from thermoporometry were supported by structural details obtained through gas adsorption measurements and small-angle x-ray scattering.
Article
Materials Science, Composites
Rajath Alexander, Ankit Dinkar, Sujay Biswas, Kinshuk Dasgupta
Summary: Comparative studies have been conducted on the mechanical behavior of polyvinyl alcohol (PVA) polymer composites with different carbon fillers, showing that functionalized carbon nanotubes and short carbon fibers have a better distribution of second phases and can significantly increase the strength of the composites. The interaction between the functional groups of carbon nanotubes and the polymeric chain of PVA plays an important role in enhancing the mechanical properties of the composites.
POLYMER COMPOSITES
(2021)
Article
Biophysics
Jyoti Prakash, Anusree Dey, Sheetal Uppal, Rajath Alexander, Amit Kaushal, Hari Sharan Misra, Kinshuk Dasgupta
Summary: A highly sensitive label-free DNA biosensor device was developed with a fully integrated standalone carbon nanotube aerogel electrode. Through electrochemical impedance, target DNA hybridization can be detected within less than 20 minutes with a detection limit of 1 pM, showing high specificity and sensitivity.
BIOSENSORS & BIOELECTRONICS
(2021)
Review
Engineering, Environmental
Shrilekha V. Sawant, Ashwin W. Patwardhan, Jyeshtharaj B. Joshi, Kinshuk Dasgupta
Summary: This review focuses on highlighting the effects of B doping on CNTs, exploring the potential applications of B-CNTs in various fields, and outlining future research directions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Shrilekha V. Sawant, Manishkumar D. Yadav, Seemita Banerjee, Ashwin W. Patwardhan, Jyeshtharaj B. Joshi, Kinshuk Dasgupta
Summary: Boron-doped carbon nanotubes (BCNTs) with varying boron content were prepared by thermo-catalytic decomposition of ethanol in the presence of boric acid. Hydrogen adsorption capacity was found to improve up to a critical boron content, after which it decreased. Various factors such as dopant concentration, bonding with carbon structures, crystallinity, and defects play pivotal roles in determining the extent of hydrogen adsorption by BCNTs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Pratiksha M. Biranje, Jyoti Prakash, Amit P. Srivastava, Sujoy Biswas, Ashwin W. Patwardhan, Jyeshtharaj B. Joshi, Kinshuk Dasgupta
Summary: This study demonstrates the electrochemical exfoliation of graphite to synthesize few-layer graphene oxide (GO) using innovative electrode design and arrangement. Control of sulfuric acid concentration and pH in the electrolyte, as well as the addition of sodium hydroxide, affected the exfoliation yield and morphology of GO sheets. The transition of GO sheets to different structural morphologies was observed by changing the electrolyte composition and pH, with lateral dimensions ranging from 500 nm to 24 µm.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Engineering, Manufacturing
Pratiksha M. Biranje, Ashwin W. Patwardhan, Jyeshtharaj B. Joshi, Kinshuk Dasgupta
Summary: This review paper focuses on liquid-phase exfoliation (LPE) of graphene and its derivatives, including electrochemical exfoliation, mechanical exfoliation, and chemical exfoliation. A comprehensive analysis of literature data on these processes provides insights into the factors that control the rate of LPE. The mechanisms for each exfoliation process are discussed, and a scale-up methodology is proposed based on these findings. The synthesis of reduced GO (rGO) through thermal and chemical routes is also discussed, along with the applications of functionalized graphene and GO in polymer matrix composites. The review explains how the bonding between epoxy groups and functional groups on graphene affects the strength and permeation properties of epoxy composites. The advantages of graphene modifications are discussed in detail to provide a better understanding of the mechanisms for industrial development. Finally, a future roadmap is proposed based on identified knowledge gaps.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Chemistry, Physical
Devika Chauhan, Anuptha Pujari, Guangqi Zhang, Kinshuk Dasgupta, Vesselin N. Shanov, Mark J. Schulz
Summary: This study investigates the synthesis of carbon nanotube (CNT) sheet using high temperature floating catalyst chemical vapor deposition (FC-CVD) method. Various combinations of metallocenes are used as precursors for metal catalysts, enabling the tailoring of properties of the CNT sheet. The multi-catalyst method reduces impurities but increases structural defects in the CNTs.
Article
Chemistry, Multidisciplinary
Jyoti Prakash, Pandugula Thirmaleshwar Rao, Rohan Rohilla, Divya Nechiyil, Manmeet Kaur, Kailasa S. Ganapathi, Anil Krishna Debnath, Amit Kaushal, Jitendra Bahadur, Kinshuk Dasgupta
Summary: In order to provide early warning against gas leakage accidents, a thin paper-like carbon nanotube (CNT) aerogel gas sensor was fabricated. The sensor showed excellent sensitivity for toxic gases like NO2 and methanol in the concentration range of 1-100 ppm, with a remarkable limit of detection of 90 ppb. Even after bending and crumpling, the sensor consistently responded to toxic gases. Through annealing at different temperatures, the sensing characteristics of the CNT aerogel film can be switched due to the change in the semiconductor nature of the film.
Article
Chemistry, Multidisciplinary
Ashish Kumar Singha Deb, Manju Mohan, Smita Govalkar, Kinshuk Dasgupta, Sheikh Musharaf Ali
Summary: By fabricating functionalized CNTs into micro beads, the low density and small size issues of nanomaterials in environmental remediation can be overcome, and these beads have been successfully used for the removal of divalent mercury ions in fixed-bed column separation.
Article
Chemistry, Analytical
Pratiksha M. Biranje, Jyoti Prakash, Rajath Alexander, Amit Kaushal, Ashwin W. Patwardhan, Jyeshtharaj B. Joshi, Kinshuk Dasgupta
Summary: This paper studied the ultra-fast detection of cancerous VOCs using a carbon nanotube aerogel (CNT aerogel) and graphene oxide (GO) hybrid network. The study found that by optimizing the loading concentration of GO and O/C ratios, a highly sensitive CNT aerogel-GO hybrid sensor can be obtained. This sensor can detect a range of non-polar VOCs and showed better sensing performance compared to the bare CNT aerogel sensor. Chemical and structural analysis indicated that the oxygen loading can change the structure of the CNT aerogel, making it ideal for sensing applications. Electron micrography images confirmed the uniformity of the GO layer on the CNT aerogel. Overall, the study concluded that a sensitive and fast CNT aerogel-GO hybrid sensor can be used for the detection and continuous monitoring of cancerous VOCs.
Article
Materials Science, Multidisciplinary
Rajath Alexander, Amit Khausal, Jitendra Bahadur, Kinshuk Dasgupta
Summary: This study demonstrates the successful enhancement of carbon conversion in the synthesis of carbon nanotube fiber through bi-directional catalyst injection, resulting in a mixture of multi-walled and single-walled carbon nanotubes.
