Article
Nanoscience & Nanotechnology
Jianwei Li, Yixiu Wang, Wenzhong Zhao, Peilun Xu, Tingyi Wang, Jie Kong
Summary: This study focuses on the synchronous optimization of microwave transmission and mechanical properties of polymer composites by modifying cyanate ester resin using polysilazane and epoxy resin. The use of quartz fibers as reinforcement resulted in high-performance quartz fiber/PSN/CE-EP composites with improved microwave-transparent and mechanical properties. The results showed that composites with 4 wt% PSN achieved the best comprehensive performance.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Polymer Science
Junji Ueyama, Ryo Ogawa, Yasuyuki Mori, Yoshio Furusho, Akihiko Tsuge, Takeshi Endo
Summary: The effect of urea derivatives (UDs) on volume shrinkage during the curing process of BAGE/DCBE/PAH was studied. UDs with N-H bonds and bulky substituents effectively reduced the volume shrinkage. Before curing, UDs were dispersed in the composition, but after curing, they dissolved in the cured compounds due to collapse of dense packing based on hydrogen bonding and/or p-stacking. Furthermore, the curing behavior and structure of the cured materials were analyzed using DSC and IR. The results showed that UDs had minimal impact on the curing of the DCBE/BAGE/PAH system.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Varsha Lisa John, N. Gomathi, K. Joseph, Dona Mathew, Satheesh M. Chandran, S. Neogi
Summary: AP plasma treatment is an effective method to functionalize the surface of carbon nanotubes (CNT) without affecting their crystallinity. This treatment improved the dispersion and mechanical properties of CNT, making them suitable for aerospace structural applications.
Article
Materials Science, Composites
Peijun Xu, Fan Wu, Lei Han, Zhao Li, Xinliang Guo, Ronghai Liu, Xiaoming Chen, Jie Zhang
Summary: This article studies the modification of cyanate ester (CE) resin with high-performance thermoplastic engineering plastic polyether sulfone (PES) to obtain a modified resin with excellent toughness. The addition of PES greatly improves the mechanical and thermal properties of the modified resin.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Jiani Zhang, Zheng Liu, Muyi Han, Junliang Zhang, Yusheng Tang, Junwei Gu
Summary: A block copolymer of PDMS-b-PGMA was synthesized via RAFT polymerization and used to functionalize quartz fibers. The resulting QFs@PDMS-b-PGMA/BADCy wave-transparent laminated composites showed optimal mechanical properties and wave-transparent performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Xiaodan Li, Xiaoqing Liu, Hongyu Liu, Rui He, Feng Wang, Shiyun Meng, Zhaomin Li
Summary: Epoxy-based silsesquioxane (EOVS) was oxidized from octavinyl silsesquioxane (OVS) and used to prepare E51/BADCy/EOVS nanocomposites with epoxy resin and cyanate ester. The addition of EOVS resulted in a lower dielectric constant due to increased free volume. The nanocavities introduced by POSS were confirmed to increase the free volume, and the crosslinking density was determined to understand the spatial structure of the nanocomposites. The E51/BADCy/EOVS nanocomposites exhibited a surprising decrease in dielectric constant and dielectric loss, making them promising candidates for the microelectronics industry.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Chemistry, Applied
Zhangzhang Tang, Jing Yang, Junhui Gong, Xinrui Zhang, Shoubing Chen, Qihua Wang, Tingmei Wang, Jianqiang Zhang, Yaoming Zhang
Summary: A shape memory polymer with high transition temperature was prepared using cyanate ester, CTBN, and epoxy resin, showing tunable Tr and excellent mechanical properties. The addition of CTBN and epoxy resin improved toughness and elongation at break, while adjusting the ratios allowed for tuning Tr and mechanical properties. The shape memory cyanate ester exhibited excellent shape memory effects, including a triple shape memory effect, making it a promising material for various applications.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
Junji Ueyama, Ryo Ogawa, Keisuke Ota, Yasuyuki Mori, Akihiko Tsuge, Takeshi Endo
Summary: The study showed that the Cy/EP/PA-hardener system has unique thermal behavior and rapid curing process, excellent adhesiveness, and results in a cured product with heat stability.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Caizhao Liu, Yuhong He, Mingming Sun, Xugang Zhang, Bin Zhang, Xuefeng Bai
Summary: This study investigated the effect of different bisphenol A glycidyl ether epoxy resins on the properties of bisphenol A cyanate ester/fluorinated poly(aryl ether nitrile) blends. The epoxy resin reduced the curing temperature and improved toughness and low-temperature processing performance. It also increased the tensile and impact strength of the modified resin system.
Article
Materials Science, Composites
Xuebing Zhang, Dandan Yang, Huigai Li, Wengang Yang, Shuxuan Qu, Weibang Lu
Summary: Carbon nanotubes (CNTs) reinforced polymeric nanocomposite has great potential for lightweight and multifunctional materials. However, achieving strong interfacial interaction and high orientation of CNTs is challenging due to their tendency to agglomerate. In this study, an ultrasonic assisted stretching strategy was proposed to enhance interfacial interaction and orientation of CNTs in composites. Under optimal ultrasonic processing conditions, the strength, modulus, toughness, and electrical conductivity of aligned nanocomposites were significantly improved.
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Composites
Xuanzheng Zhao, Bijian Lan, Yinxiang Lu, Yu Bai
Summary: In this study, APTES-modified h-BN nanoparticles were filled into a composite material, resulting in improved mechanical and dielectric properties. Finite element analysis successfully predicted the dielectric properties of the composites, and molecular dynamics simulation quantitatively calculated the change in interface energy, providing theoretical support for this study.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Characterization & Testing
Balaji Krishnasamy, Hariharan Arumugam, M. Mohamed Iqbal, Alagar Muthukaruppan
Summary: This study focused on developing high-performance polymeric hybrid binary blends with various resin combinations, demonstrating different polymerization temperatures, T-g values, and thermal stabilities, while exhibiting good flame-retardant properties.
POLYMERS & POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
T. Sathish, R. Saravanan, Anuj Kumar, Chander Prakash, Mohd Shahazad, Manish Gupta, N. Senthilkumar, Bidhan Pandit, Mohd Ubaidullah, Vladimir A. Smirnov
Summary: This study aimed to enhance the mechanical, wear, and corrosion properties of aluminium alloy AA5083 by incorporating nanoparticles as reinforcements, resulting in hybrid aluminium nanocomposites. The effects of different parameters in the powder metallurgy process were evaluated and analyzed using DOE, and the results showed a significant correlation between mixing time and microhardness of the nanocomposites. The study also found that sintering time had a significant impact on wear and corrosion reduction rates. The highest recorded microhardness value was 136 VHN, while the lowest observed rates of wear and corrosion were 0.192 mm3/m and 0.00081 mm/year, respectively.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Instruments & Instrumentation
Linlin Wang, Fenghua Zhang, Yanju Liu, Shanyi Du, Jinsong Leng
Summary: Smart materials and structures, particularly shape memory cyanate ester (SMCE) resin, have been rapidly developing and widely recognized in the aerospace field. SMCE resin has great potential in space deployable structures due to its high glass transition temperature (T-g) and excellent mechanical properties. The combination of carboxyl functionalized multi-walled carbon nanotubes and short carbon fiber enhances the thermodynamic properties and shape-changing capability of SMCE composites.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Polymer Science
Zhilin Cao, Changxin Ren, Zhengzhou Wang
Summary: In this study, a flame retardant copper phenyl phosphonate (CuPP) was synthesized and applied in EP/CE copolymer, improving the fire retardancy and thermal stability of the composite. The fire and thermal behavior of EP/CE/CuPP composites were investigated and the results showed that EP/CE/CuPP5 composite achieved a UL-94 rating of V-1 and a limiting oxygen index of 30.6%. The peak heat release rate and total heat release values of EP/CE/CuPP5 composite decreased by 34.5% and 18.9%, respectively, compared to pure EP/CE copolymer. The EP/CE/CuPP composite also had a higher glass transition temperature, indicating higher working temperature and better heat resistance.
Article
Engineering, Chemical
R. Jairaja, G. Narayana Naik
Summary: The study characterized weak bond effects in adhesively bonded joints between dissimilar adherends. Weak bonds were introduced using PTFE films, and their presence was verified through X-ray radiography and ultrasonic tests. It was found that an increase in weak bond area leads to interface failure and a decrease in failure load.
JOURNAL OF ADHESION
(2021)
Article
Materials Science, Multidisciplinary
Brijesh Kushwaha, Kush Dwivedi, Rushikesh S. Ambekar, Varinder Pal, Dibya Prakash Jena, Debiprosad Roy Mahapatra, Chandra Sekhar Tiwary
Summary: Hierarchical structures such as the Menger sponge exhibit remarkable mechanical properties with lower effective density, as studied through experiments and simulations. The different cavity shapes in the structure are analyzed for damage initiation under compressive loading, providing insight into the unique properties of hierarchical architecture in regulating mechanical properties. Acoustic investigation indicates that the Menger sponge is a better absorber in the low-frequency regime compared to commercial sponge materials.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Composites
Komal Chawla, Benjamin Raju, Dakshayini B. Subbappa, Kishore Babu Kancherla, Debiprosad Roy Mahapatra
Summary: This paper discusses the impact of pore formation mechanism on the elastic properties of composite polymer matrix, proposes a micromechanical model considering different stages of pore formation, and validates the model through experimental measurements on polymer samples.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
D. Chakravarty, N. Laxman, R. Jayasree, R. B. Mane, S. Mathiazhagan, P. V. V. Srinivas, R. Das, M. Nagini, M. Eizadjou, L. Venkatesh, N. Ravi, D. R. Mahapatra, R. Vijay, S. P. Ringer, C. S. Tiwary
Summary: The study demonstrates the fabrication of a high-strength, high-dense W-TaC-Ta2O5 nanocomposite on a large scale using plasma sintering, showing superior properties for applications in extreme environments.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Engineering, Biomedical
Subhan Shaik, Aarthi Saminathan, Deepak Sharma, Jagdish A. Krishnaswamy, D. Roy Mahapatra
Summary: The rise in industrial effluents, bio-waste, and pharmaceuticals has worsened surface water and drinking water sources. This study successfully monitored microbial cell growth using electrical impedance spectroscopic technique incorporated in a micro-fluidic chip, revealing that reverse osmosis water is more likely to be contaminated with bacterial pathogens.
BIOMEDICAL MICRODEVICES
(2021)
Article
Materials Science, Multidisciplinary
Prashant Kunjam, K. Shashidhar, S. Rakesh, D. Roy Mahapatra
Summary: This paper proposes an algorithm to generate statistically equivalent microstructures of alloys for finite element modeling, using morphological and crystallographic characteristics obtained from scanning electron microscopy images. The algorithm employs image data, perturbation, and Voronoi tessellation to create polygonal microstructures that capture the randomness of grain shape and size iteratively. It also discusses the introduction of lower-order elements on the domain boundary and presents a method to eliminate artifacts and analyze stress concentrations due to grain orientation mismatch.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Bidisha Nath, Praveen C. Ramamurthy, Debiprosad Roy Mahapatra, Gopalkrishna Hegde
Summary: Perovskite solar cells have attracted significant attention due to their high efficiency and interesting properties. Defects in the absorber layer have been identified as a major factor impacting the power conversion efficiency. In this study, P-I-N structured devices were passivated using Cuprous iodide, resulting in a reduction of defects in the bandgap and improved device performance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Acoustics
G. Kolappan Geetha, Rajendra Kumar Munian, D. Roy Mahapatra, Chi-Won In, D. A. Raulerson
Summary: In this study, new insights are presented into the spatial localization of anharmonic caused by impact-separation contact dynamics in a cavity-like feature. Different nonlinear anharmonics are identified using various models and simulations, revealing that super-harmonics and sub-super harmonics are generated when the target structure resonates precisely and with a slight mistuning, respectively. The response amplitude and energy in the primary excitation frequency are reduced due to energy partitioning, and the ratios of Power Spectral Density (PSD) of anharmonics to that of primary excitation decrease linearly and quadratically with decreasing separation distance and relative amplitude, respectively.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Mechanics
N. Gupta, S. R. Hiremath, D. R. Mahapatra
Summary: This study investigates the micro-crack bridging and optimal dispersion mechanism of carbon nanotubes (CNTs) in the E-glass fabric reinforced polymer (GFRP) matrix. The results show that under specific processing conditions and with the use of dispersant agents, the addition of a small amount of CNTs can reduce porosity, residual stress, and achieve consistent dispersion strengthening effect, resulting in improved tensile and compressive properties.
MECHANICS OF COMPOSITE MATERIALS
(2022)
Article
Energy & Fuels
Bidisha Nath, Simranjeet Singh, Sushant Kumar Behera, Praveen C. Ramamurthy, Debiprosad Roy Mahapatra, Gopalkrishna Hegde
Summary: Interface engineering plays a dominant role in improving charge carrier extraction ability in metal-halide perovskite solar cells (PSCs). Modifying the interface between the perovskite absorber layer and the electron transfer layer (ETL) using a novel metal-organic framework (MOF) is a promising method to enhance charge transfer ability. By reducing trap states, this ETL modification promotes better growth of perovskite films and leads to a 12% improvement in device efficiency. Different capacitive behaviors are analyzed to understand charge accumulation and transport properties. Density functional simulation findings and the presence of delocalized surface states further support the enhancement of device performance.
Article
Engineering, Aerospace
Divya Shyam Singh, Atul Agrawal, Debiprosad Roy Mahapatra
Summary: This article presents a reduced-order modeling framework for simulating vibration signatures of faults in bladed disks on a rotating shaft. Lumped and one-dimensional analytical models are employed to better understand the complex dynamic response. The framework addresses the challenges in fault detection and identification for health monitoring of aeroengines and other rotating machinery. The proposed framework can be applied in probabilistic signal modeling, machine learning for fault signature identification, and parameter estimation with measured vibration signals.
SAE INTERNATIONAL JOURNAL OF AEROSPACE
(2023)
Proceedings Paper
Engineering, Manufacturing
Bidisha Nath, Praveen C. Ramamurthy, D. Roy Mahapatra, Gopalkrishna Hegde
Summary: Organic photodetectors are an emerging topic in organic electronics due to the interesting properties of different organic semiconductors. A flexible light detector based on a PET-based bilayer heterojunction organic photodetector (OPD) involving CuPc and PC60BM has been fabricated. The OPD demonstrated a spectral response in the range of 300 to 800 nm, with the highest EQE of 10.2% observed at 475 nm.
2022 IEEE INTERNATIONAL CONFERENCE ON FLEXIBLE AND PRINTABLE SENSORS AND SYSTEMS (IEEE FLEPS 2022)
(2022)
Article
Thermodynamics
N. K. Gopinath, K. V. Govindarajan, D. Roy Mahapatra
Summary: This paper presents a study on the three-dimensional transient fluid-thermo-structural behavior of an actively cooled sandwich panel under hypersonic accelerating-cruise flight conditions. The results show that active cooling can effectively control thermo-structural deformation and improve combustion efficiency.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Electrical & Electronic
Bidisha Nath, Praveen C. Ramamurthy, Debiprosad Roy Mahapatra, Gopalkrishna Hegde
Summary: By using metal nanopowder for thermally evaporated top electrodes in perovskite solar cells, this study found a significant improvement in device performance, including lower series resistance and higher shunt resistance, leading to enhancements in open-circuit voltage and power conversion efficiency. Metal nanopowder can reduce recombination processes, thus improving device performance.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Sadananda Megeri, G. Narayana Naik
Summary: In this study, the low velocity impact behavior of fiber metal laminates (FML) was simulated using the Explicit Finite element method. The results showed that FML with hybrid carbon and glass fiber performed better than FML with only glass fiber.
MATERIALS TODAY-PROCEEDINGS
(2021)
