Article
Polymer Science
Selvaraj Kumar, Hariharan Arumugham, Debmalya Roy, Dinakaran Kannaiyan
Summary: Polyimide nanocomposites with low dielectric constant and UV shielding properties were successfully developed using in-situ polymerization filled with fluorinated graphene oxide. The study observed that the water contact angle of polyimide increased with the increment of FGO, with the highest contact angle of 108 degrees obtained for 15 wt% FGO reinforced polyimide composite. The dielectric constant values for neat, 1, 5, and 15 wt% FGO reinforced polyimide composites were 4.5, 3.7, 2.6, and 2.0, respectively, indicating improved dielectric behavior. Additionally, UV-Vis spectroscopy analysis showed good UV shielding behavior in FGO reinforced polyimide composites.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Polymer Science
V. E. Ogbonna, A. P. Popoola, O. M. Popoola, S. O. Adeosun
Summary: The reinforcing effect of electrical corrosion resistance (ECR) glass fibers on the polyimide (PI) matrix was studied in this research. It was found that the ECR/PI matrix composite exhibited improvements in hardness, stiffness, and elastic modulus, as well as low dielectric constant and electrical conductivity.
Article
Materials Science, Multidisciplinary
Qing Li, Yujuan Guo, Shunmin Yi, Zushun Xu, Wengui Duan, Sheng Liu
Summary: Natural marine sepia eumelanin-derived additives (ASE) were used to modify highly fluorinated polyimide (FPI) and enhance its performance. The FPI/ASE film showed improved mechanical and thermal properties, with optimal tensile strength and fracture elongation. It also exhibited exceptional UV-shielding capabilities and light stability, making it a potential candidate for UV shielding in aerospace applications.
ACS APPLIED POLYMER MATERIALS
(2023)
Review
Chemistry, Applied
Yahui Li, Gaohui Sun, Yu Zhou, Guangmin Liu, Jun Wang, Shihui Han
Summary: This article reviews the recent research progresses in low-k PI film, including both intrinsic and porous low-k PI films. The dielectric loss (D-f) and the influencing factors are analyzed. The advantages and disadvantages of different routes to generate low-k PI film are summarized, and the dielectric properties, thermal stability, and mechanical properties are compared. This article aims to gain a deeper understanding about low-k PI film and provide a reference for its future development.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Polymer Science
Jun Seok Lee, Yong-Zhu Yan, Sung Soo Park, Suk-kyun Ahn, Chang-Sik Ha
Summary: A novel polyimide film was prepared using a newly synthesized diamine monomer and a typical chemical reaction. The resulting film showed good solubility, optical transparency, water resistance, and low dielectric constant.
Article
Polymer Science
Weikai Sun, Minhao Yang, Kun Peng, Yaqin Fu
Summary: The demand for high-speed communication at high frequency has led to the development of low-dielectric polymer films. Aromatic polyimide (PI) is commonly used in flexible circuit boards due to its excellent properties, but its dielectric constant is relatively high for high-frequency communication. To address this, a hyper-crosslinked polymer (HCP) was synthesized and blended with PI to form all-organic HCP/PI composite films. The porous structure of HCP helps to reduce the dielectric constant of the PI matrix. By adjusting the HCP content, the dielectric constant of the composite films can be effectively lowered in the desired frequency range. This method is simple and can be applied to other organic component-filled PI systems.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Materials Science, Composites
Selvaraj Kumar, Arumugam Hariharan, Alagar Muthukaruppan, Debmalya Roy, Kannaiyan Dinakaran
Summary: Graphene oxide reinforced polyimide composites with low dielectric constant, improved thermal stability, surface behavior, and UV shielding properties have been developed successfully, and experimental studies show that they exhibit excellent performance.
COMPOSITE INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Qing Li, Yujuan Guo, Meijia Wu, Fei Deng, Jieying Feng, Jiafeng Liu, Sheng Liu, Chaoliu Ouyang, Wengui Duan, Shunmin Yi, Guangfu Liao
Summary: A series of highly fluorinated polyimide/allomelanin nanoparticles (FPI/AMNPs) films were prepared, showing significantly enhanced mechanical and UV-shielding properties due to the formation of hydrogen bonds. The tensile strength and fracture elongation of the FPI/AMNPs films were 1.78 and 1.56 times that of pure FPI, respectively. UV-vis spectrum measurements, photodegradation tests, and repeated running tests confirmed the excellent UV-shielding capabilities of the FPI/AMNPs films. The synergistic UV absorption and photothermal conversion of charge transfer complexes in FPI and AMNPs were identified as the enhancement mechanisms for UV shielding.
Review
Polymer Science
Zhenjiang Pang, Hengchao Sun, Yan Guo, Jun Du, Liang Li, Qiuyang Li, Junzhong Yang, Jijun Zhang, Weiguo Wu, Sen Yang
Summary: With the growth of the microelectronics industry, the need for interlayer insulation materials with low dielectric constant (k) has gained significant attention. This study reviews the development of porous PI-based composites aimed at reducing the dielectric constant. It emphasizes the application of porous SiO2, graphene derivatives, polyoxometalates, polyhedral oligomeric silsesquioxane, and hyperbranched polysiloxane in achieving low k PI.
Article
Materials Science, Characterization & Testing
Qing Li, Yujuan Guo, Chaoliu Ouyang, Shunmin Yi, Sheng Liu
Summary: Polydopamine (PDA), also known as artificial melanin, was used to prepare a series of porous highly fluorinated polyimide/polydopamine (FPI/PDA) films via cyclodehydration. The films showed reinforced thermal, mechanical, UV-shielding, and photostability properties due to the hydrogen bond and porous structure. The addition of PDA improved the tensile strength and fracture elongation, reaching a maximum at 0.5 wt % PDA content. The porous FPI/PDA film exhibited excellent UV-shielding properties and visible light transmittance, as well as durability after UV irradiation.
Article
Materials Science, Multidisciplinary
Qing Li, Sheng Liu, Yujuan Guo, Yulin Liang, Hualing Peng, Ronghua Chen, Fuhou Lei, Wei Wu, Hui Zhao, Qunchao Zhang, Robert K. Y. Li, Wengui Duan
Summary: The influence of polydopamine (PDA) nanoparticles of different sizes on the structure, thermal stability, mechanical performance, and UV shielding properties of polyimide (PI) nanocomposites was investigated. The results showed that PI nanocomposites with 120 nm PDA particles exhibited improved mechanical properties and better UV shielding performance.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Gh. Dehghan Khalili, S. Alipour, M. R. Akbarpour, S. Moniri Javadhesari
Summary: In this study, CuO nanoparticles were incorporated into a PVA matrix to fabricate a CuO-PVA nanocomposite film. The CuO size was estimated to be around 37 nm. The integration of CuO into the polymer matrix resulted in enhanced mechanical and dielectric properties for the nanocomposites.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Composites
Jialin Zhang, Xingwang Lai, Jinhui Li, Tao Wang, Liang Shan, Fangfang Niu, Guoping Zhang, Rong Sun
Summary: This study focuses on tailoring polyimide (PI) by modifying it with fluorinated nanofillers to improve its mechanical properties, heat resistance, hydrophobicity, and reduce its dielectric constant. The introduction of fluorinated nanofillers significantly enhances the performance of the composite films, especially with the use of fluorinated graphene quantum dots (FGQD). The FGQD/PI composite film demonstrates excellent comprehensive performance, making it highly promising for advanced packaging and microelectronics industry.
POLYMER COMPOSITES
(2023)
Article
Engineering, Environmental
Zuzanna Kantor, Tingting Wu, Zhihui Zeng, Sabyasachi Gaan, Sandro Lehner, Milijana Jovic, Anne Bonnin, Zhengyuan Pan, Zahra Mazrouei-Sebdani, Dorina M. Opris, Matthias M. Koebel, Wim J. Malfait, Shanyu Zhao
Summary: Polymer aerogels are a promising alternative to brittle silica aerogels, but they lack high-temperature stability. Researchers have developed a new type of aerogel composite with unique structure and excellent properties, which could be used in applications requiring high mechanical strength, low thermal conductivity, and low dielectric constant.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Yujie Li, Yifan Chen, Qiang Wu, Jingda Huang, Yadong Zhao, Qian Li, Siqun Wang
Summary: In this study, PVA nanocomposite films enhanced by PEI-lignin/LCNFs were synthesized and exhibited improved mechanical, hydrophobic, anti-UV and antibacterial properties. The addition of LCNF-PEI had a significant effect on the performance of the films, suggesting potential applications in the packaging field.
Article
Polymer Science
Subasri Appasamy, Hariharan Arumugam, Latha Govindraj, G. Rathika, Balaji Krishnasamy, Alagar Muthukaruppan
Summary: Two structurally different benzoxazines were developed through Mannich condensation reaction using bisphenol-F and bisphenol-Z, showing slightly lower polymerization temperature and better thermal stability for poly(BF-abn) compared to poly(BZ-abn). The formation of a three dimensional cross-linked network structure was confirmed after thermal curing, and both benzoxazine samples exhibited excellent hydrophobic behavior.
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
(2022)
Article
Polymer Science
Govindraj Latha, Arumugam Hariharan, Krishnasamy Balaji, Ammasai Kumaravel, Muthukaruppan Alagar
Summary: The present work focuses on developing and characterizing benzoxazines for corrosion resistance applications. Blends of benzoxazines were reinforced with functionalized zirconium phosphate and their thermal stability, hydrophobic behavior, UV shielding behavior, and corrosion resistance were evaluated. Results showed that the benzoxazine blends exhibited good thermal stability, hydrophobicity, and UV shielding behavior. The specimen coated with 2.5 wt% functionalized zirconium phosphate showed the highest corrosion resistance.
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
(2022)
Article
Polymer Science
Vellapandi Saravanan Veera Sena, Hariharan Arumugam, Khajanajimudeen Mohamed Mydeen, Balaji Krishnasamy, Mohamedmustafa Mohamed Iqbal, Alagar Muthukaruppan
Summary: Hybrid composites developed by incorporating granite dust reinforcement exhibit improved thermal stability and hydrophobic properties, making them suitable for high-performance industrial and engineering applications.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Polymer Science
Roja Chinnamuthu, Priyanka Madesh, Hariharan Arumugam, Balaji Krishnasamy, Latha Govindraj, Mallika Jaganathan, Alagar Muthukaruppan
Summary: A new class of quinolinyl phenol-based benzoxazines were synthesized and their molecular structures were characterized. The compounds showed good flame-retardant characteristics and hydrophobic properties. Furthermore, they exhibited excellent surface protection against corrosion for mild steel.
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
(2023)
Article
Polymer Science
Subasri Appasamy, Hariharan Arumugam, Balaji Krishnasamy, Alagar Muthukaruppan
Summary: Two series of photosensitive benzoxazines were synthesized using a DVCP/DVCH core and structurally different amines through Mannich condensation reaction. The synthesized benzoxazines exhibited good thermal stability, hydrophobic behavior, and self-extinguishing properties. The photosensitivity of the benzoxazines decreased with an increase in the size of the cycloalkanone ring.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Mrinalini Shah, Harinei Srinivasan, Hariharan Arumugam, Balaji Krishnasamy, Alagar Muthukaruppan
Summary: This study aimed to synthesize cardanol-based mono, bi, and tetrafunctional benzoxazines through the Mannich condensation of various aryl and cycloaliphatic amines with cardanol. The benzoxazines were characterized for their molecular structure, curing behavior, thermal stability, and hydrophobic nature. It was found that tetra-functional benzoxazines have a lower curing temperature and that cycloaliphatic amine-based benzoxazines have a lower curing temperature compared to aryl amine-based benzoxazines. The thermal stability and water contact angle of the benzoxazines were also investigated, showing variations among different systems. The results suggest that cardanol-based tetrafunctional benzoxazines can have applications in microelectronics and automotive industries.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Shengnan Li, Pengli Ma, Jishuang Yang, Srinivasan Krishnan, Kannan S. Kesavan, Ruimin Xing, Shanhu Liu
Summary: Developing an efficient and low-cost multi-functional electrocatalyst to replace noble metals is crucial for industrial water electrolysis and sustainable green hydrogen fuel production. In this study, ultrathin CuCo2S4 nanosheets assembled into highly open three-dimensional nanospheres were prepared and used as a bifunctional electrocatalyst for overall water splitting. The CuCo2S4 catalyst exhibited a larger specific surface area and showed excellent activity and stability for proton reduction and oxygen evolution reactions in alkaline conditions. This work provides a simple strategy for the design of spinel-based transition metal sulfide catalysts for electrocatalysis.
Article
Chemistry, Multidisciplinary
Narmatha Muthukumar, Hariharan Arumugam, Balaji Krishnasamy, Muthusamy Athianna, Alagar Muthukaruppan
Summary: Three bio-based benzoxazines were synthesized from curcumin and three different primary amines (aniline, furfurylamine, and octadecylamine). The synthesized curcumin based benzoxazine monomers (CU-a, CU-ffa, and CU-oda) were confirmed using FTIR and H-1-NMR spectra. The benzoxazine monomers exhibited high thermal stability, flame-retardant qualities, and hydrophobicity, making them suitable for various applications. Furthermore, they showed efficient corrosion and antimicrobial properties as coating materials for mild steel.
Article
Chemistry, Physical
Harinei Srinivasan, Hariharan Arumugam, Sarawut Rimdusit, Alagar Muthukaruppan
Summary: In order to tackle the environmental concerns caused by the increase of global population, efforts have been made to reduce the use of fossil-based precursors and chemicals. This study focuses on the preparation of sustainable bio-benzoxazine resins using different amine systems and paraformaldehyde. The molecular structure of the benzoxazines were analyzed and cotton cloth was coated with aliphatic amine based benzoxazine to make it superhydrophobic. Additionally, functionalized bio-silica and graphitic carbon nitride reinforcements were separately prepared and used to develop polybenzoxazine composites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Chemical
Mohamed K. Mydeen, Hariharan Arumugam, Balaji Krishnasamy, Subramanian Sathy Srikandan, Alagar Muthukaruppan
Summary: In this study, a new type of bio-based tyrosine-dipeptide (TB) was synthesized and converted into a modified benzoxazine (TB-Bz) using different amino compounds and formaldehyde. The structure of these benzoxazines (TB-a, TB-dd, and TB-ff) was analyzed and their curing behavior and thermal stability were examined. The results showed that the poly(TB-ff) coated specimen exhibited the highest corrosion protection efficiency of about 98.3%. Therefore, the bio-based tyrosine dipeptide benzoxazines developed in this study can be considered as a better coating material for mild steel surfaces under adverse environmental conditions.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2023)
Article
Polymer Science
Harinei Srinivasan, Jeyameena Krishnan, Hariharan Arumugam, Alagar Muthukaruppan
Summary: This study developed bisphenol-BA based benzoxazines and investigated their potential applications in thermal, high-dielectric, low-dielectric, and anti-corrosion fields. Bifunctional benzoxazine resins were synthesized using bisphenol-BA and different types of amines, and characterized using various techniques. The results showed that certain composites, such as poly(BBA-tfma) with 5 wt% SBA-15 and poly(BBA-ffa) with 10 wt% bio-silica, exhibited low dielectric constant values. However, the addition of 5 wt% reduced graphene oxide (rGO) to poly(BBA-tfma) increased the dielectric constant value. Moreover, the bisphenol-BA with aminoethoxyethanol benzoxazine (poly(BBA-aee)) showed better corrosion protection behavior than other benzoxazines. Overall, the bisphenol-BA-based benzoxazines and their composites demonstrated potential for various industrial applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Ibrahim Lawan, Hariharan Arumugam, Napatsorn Jantapanya, T. Lakshmikandhan, Cheol-Hee Ahn, Alagar Muthukaruppan, Sarawut Rimdusit
Summary: This study proposes a comprehensive concept for utilizing waste from the cashew processing industry to produce functional and high-performance bio-composites. The study successfully prepared acoustic barriers, fuel briquettes, and friction composites using different components obtained from cashew apple bagasse, cashew nut shell, and cardanol.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Polymer Science
Nagarjun Jayakumar, Hariharan Arumugam, Anto Dilip Albert Selvaraj
Summary: FDM is a popular AM technology used worldwide, but it causes a staircase effect on the printed surface. Chemical vapour dip and immersion techniques offer a rapid solution to improve surface integrity.
Article
Materials Science, Composites
Subasri Appasamy, Arunachalam Kuppusamy, Hariharan Arumugam, Balaji Krishnasamy, Alagar Muthukaruppan
Summary: This study provides a convenient method for synthesizing pyrimidinone-based benzoxazines by separately reacting pyrimidinone bisphenol (PBU) and paraformaldehyde with various types of amines under suitable experimental conditions. The analysis of the molecular structure, curing characteristics, thermostability, hydrophobic behavior, and dielectric properties was conducted using appropriate analytical methods. The study found that pyrimidinone-based benzoxazines can be used as high-performance products, such as encapsulants, potting agents, and composites for automotive and microprocessor applications.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
K. Mohamed Mydeen, Hariharan Arumugam, Balaji Krishnasamy, Alagar Muthukaruppan
Summary: Four different series of sesamol-based benzoxazines were synthesized using various amines, and were used for hydrophobic coating, low dielectric and high dielectric applications. The chemical structure, curing behavior, thermal stability, water contact angle (WCA), and dielectric characteristics were evaluated. Poly(S-ffa) and poly(S-dde) exhibited higher char yield compared to other polybenzoxazines studied. Poly(S-tfma) showed a higher WCA (152 degrees) and superhydrophobic behavior. Bamboo ash-based bio silica reinforced poly(S-ffa) composites had a dielectric constant and dielectric loss of 2.36 and 0.0033, respectively. 15 wt% of cardanol functionalized graphitic carbon nitride (GCN-c) reinforced poly(S-dde) composites showed the highest values of dielectric constant (7.82) and dielectric loss (0.0029).
NEW JOURNAL OF CHEMISTRY
(2023)
