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
Materials Science, Multidisciplinary
Jun Jiang, Changping Yin, Suli Xing, Nan Wu, Fahao Zhang, Jun Tang
Summary: In this study, a nonmetallic catalyst, 4-(4-aminophenoxy) phthalonitrile (PN-NH2), was used to reduce the curing temperature and time of cyanate ester (CE) resin. The addition of PN-NH2 significantly decreased the characteristic curing temperatures and activation energy of the CE resin. The cured resins with PN-NH2 showed superior mechanical and dielectric properties while maintaining reduced curing temperatures.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Wenxing Jiang, Xianhong Zhang, Dong Chen, Yuhong Ma, Wantai Yang
Summary: A novel modification strategy utilizing BMI-HPPs was developed to reduce the dielectric constant and enhance the toughness of CE resins, showing great potential in the fields of microelectronics and aerospace. The modified CE resins exhibited significantly improved properties, including lower ε values, enhanced wave transmission, and increased impact strength compared to pristine CE resins.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Ceramics
A. Amelina, A. Mikhlin, S. Belus, A. Bondarev, A. Borisevich, D. Kuznetsova, I Komrotov, V Mechinsky, D. Kozlov, P. Volkov, G. Dosovitskiy, M. Korzhik
Summary: A heavy scintillation glass composed of Gd2O3-Al2O3-SiO2 doped with Ce, which combines high light yield and fast scintillation kinetics, has been developed. This material shows potential for use in large volume detectors, medical imaging, and other high energy physics applications due to its low-cost production capability.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
James Huang, Jing Mu, Yunil Cho, Charles Winter, Victor Wang, Zichen Zhang, Kesong Wang, Chanyoung Kim, Ajay Yadav, Keith Wong, Srinivas Nemani, Ellie Yieh, Andrew Kummel
Summary: Selective and smooth low-k SiOx/AlOx nanolaminate dielectric on dielectric (DOD) was achieved using a hybrid water-free pulsed CVD process. Aniline selective passivation was demonstrated on W surfaces. The deposition of a low-k dielectric on the nanoscale was confirmed by TEM analysis.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Composites
Shumao Li, Yanfang Zhu, Yan Wang, Baorui Wang, Yudong Huang, Tao Yu
Summary: The copolymerization of PAI and CE significantly improves the performance of cyanate ester resins; PAI-modified cyanate ester resins have the lowest water absorption rate and total mass loss rate.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Zheng Liu, Xiaoli Fan, Lei Cheng, Junliang Zhang, Lin Tang, Yusheng Tang, Jie Kong, Junwei Gu
Summary: By combining modified fibers with reinforced resins, the interlaminar shear strength and flexural strength of the composite material are improved, while the dielectric constant and dielectric loss are reduced. The wave transmittance of the composite material is also improved. In addition, the modified treatment can increase the volume resistivity and breakdown strength of the composite material, and has a certain impact on the heat resistance of the material.
ADVANCED FIBER MATERIALS
(2022)
Article
Engineering, Environmental
Rui Liu, Hongxia Yan, Yuanbo Zhang, Kaiming Yang, Shang Du
Summary: This article introduces a BADCy resin containing hyperbranched polysiloxane, which has advantages of lower curing temperature, increased toughness, and lower dielectric constant and dielectric loss tangent values. It shows promising potential applications in electronic packaging.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Olga Grigoryeva, Alexander Fainleib, Olga Starostenko, Kristina Gusakova, Viktor Sakhno, Andrey Borzakovskiy, Tetyana Kovalinska, Boulous Youssef, Fabrice Gouanve, Eliane Espuche, Daniel Grande
Summary: Thermally stable nanoporous polymer films were created by combining thermosetting CERs and LPU, followed by alpha-particle irradiation and chemical etching. The resulting films showed well-defined nanoporous structures, high thermal characteristics, and effective gas transport properties. The materials have potential applications as ultrafiltration membranes in advanced technologies, especially under extreme conditions.
Article
Chemistry, Multidisciplinary
Dapeng Fu, Qingbo Fang, Fukang Yuan, Junle Liu, Heyi Ding, Xuan Chen, Chaoyi Cui, Jinhui Ding
Summary: This study presents a near-infrared light-triggered drug delivery system, utilizing CuS nanoparticles as photothermal agents and mesoporous SiO2 for loading the thrombolytic drug uPA. The system shows excellent photothermal performance and potential as a drug carrier, with enhanced drug release under NIR laser irradiation. In vivo testing demonstrates the system's ability for thrombolysis, providing a promising approach for combined therapy.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Xuan Zhang, Yang Zhang, Xianlong Zhang, Shaoyun Guo
Summary: This study constructed novel silicon dioxide/polybutadiene (SiO2/PB) composites with different SiO2 morphologies and surface function groups, showing extremely low dielectric constant and dielectric loss. The crosslinking reaction between surface surficial vinyl groups of the SiO2 and PB macromolecules tremendously suppressed the interfacial polarization of the composites, leading to improved material performance.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Ceramics
J. J. Bian, H. Wang, H. J. Wang
Summary: In this study, 0.05AlPO4-0.05BPO4-0.90SiO2 glass-ceramic and glass-free 0.45AlPO4-0.45BPO4-0.10SiO2 ceramic were prepared and their terahertz (THz) dielectric responses were characterized. Both samples showed little dielectric dispersions in the (sub) THz frequency range, with dielectric permittivities of -3.35 (7) and -4.06 (8) respectively. The dielectric responses were dominated by phonons and electronic polarizations in the (sub) THz frequency range. The glass-free sample exhibited extremely high Qxf values (100,000-190,000 GHz) in the THz band, much higher than the glass-ceramic (-7000-25,000 GHz).
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Yuxiao Zhou, Junliang Zhang, Chang Qu, Liangchen Li, Jie Kong, Junwei Gu
Summary: A novel P(PFS-co-GMA) copolymer synthesized via RAFT polymerization was used to modify BADCy resin, improving its transparency and mechanical properties, with the optimal performance observed at a 15% loading.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
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)
Review
Chemistry, Analytical
Yuliya A. Podkolodnaya, Alina A. Kokorina, Tatiana S. Ponomaryova, Olga A. Goryacheva, Daniil D. Drozd, Mikhail S. Khitrov, Lingting Huang, Zhichao Yu, Dianping Tang, Irina Yu. Goryacheva
Summary: Luminescent carbon nanostructures (CNSs) have attracted attention due to their photoluminescent properties, structural features, low toxicity, and various applications. The application of a silica matrix reduces the challenges in separating CNSs and improves their optical properties. In addition, multifunctional particles combining CNSs with other nanoparticles show promise in diverse fields.
Article
Chemistry, Applied
Vengatesan M. Rangaraj, Subramani Devaraju, K. Rambabu, Fawzi Banat, Vikas Mittal
Summary: The study demonstrates that incorporating Ag-Sep hybrid into composite films can increase modulus, improve migration of active compounds in food simulants, exhibit high DPPH radical inhibition efficiency, and slow-release kinetics. The Ag-Sep hybrid also enhances the antimicrobial properties of the composite film.
Article
Polymer Science
Devaraju Subramani, Krishnadevi Krishnamoorthy, Naveena Eeda, Sriharshitha Salendra, Ashok Kumar Achimuthu
Summary: A highly flexible bio-silica reinforced poly (benzoxazine-co-epoxy) hybrid composites with improved thermal and flame-resistance properties were developed in this study. The composites are potential materials for various applications including marine coating, aerospace, and microelectronics.
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Matthew A. Bone, Brendan J. Howlin, Ian Hamerton, Terence Macquart
Summary: Polymeric materials modelling can accelerate the discovery of new materials, AutoMapper is an open-source application that automates the generation of simulation files, eliminating the majority of human effort through an iterative path search algorithm to accurately map pre- and post-reaction polymerisation structures.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Chemistry, Analytical
Suihua He, Pascaline Bouzy, Nicholas Stone, Carwyn Ward, Ian Hamerton
Summary: By incorporating 1-(2-aminoethyl)piperazine (AEPIP) into a commercial epoxy blend, selective localization of amine-functionalized graphene nanoplatelets (A-GNPs) was achieved, resulting in a bicontinuous microstructure. Spectral imaging techniques and optical photothermal infrared (O-PTIR) spectroscopy were used to study the morphology and structure of the cured blend.
ANALYTICAL CHEMISTRY
(2022)
Article
Polymer Science
S. Devaraju, P. Eswar, T. Gangadhar Reddy, K. Ravi Kumar
Summary: Low-temperature curing aniline-based benzoxazines were developed using transition metal salts and alkali-alkaline earth metal salts as catalysts. The catalysts effectively reduced the curing temperature and improved the flame retardant properties of the resultant polybenzoxazines.
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
(2022)
Article
Chemistry, Physical
Narongkorn Krajangsawasdi, Ian Hamerton, Benjamin K. S. Woods, Dmitry S. Ivanov, Marco L. Longana
Summary: This paper explores the use of a novel discontinuous fibre reinforced thermoplastic filament called Discontinuous Aligned Fibre Filament (DcAFF) for 3D printing to produce complex structural parts. The study reshapes initial carbon fibre-poly(lactic acid) (PLA) tape into a circular filament, DcAFF, using a scalable machine designed for high production rates. The filaments are then printed using a general-purpose 3D printer. Tensile and open-hole tensile tests show that the DcAFF specimens have superior mechanical properties compared to other PLA-based 3D printed composites. The failure mechanism of the composite transitions from brittle to ductile through the printing path raster.
Article
Chemistry, Physical
Narongkorn Krajangsawasdi, Duc H. Nguyen, Ian Hamerton, Benjamin K. S. Woods, Dmitry S. Ivanov, Marco L. Longana
Summary: DcAFF is a novel fused filament fabrication (FFF) 3D printing material made of highly aligned discontinuous fibres. This study investigates the challenges in printing accuracy for DcAFF and examines techniques for improving it. By adjusting machine parameters and introducing a compensation algorithm, the printing precision can be improved for complex geometries.
Article
Food Science & Technology
Khadija Farousha, Vengatesan M. Rangaraj, K. Rambabu, Mohammad Abu Haija, Fawzi Banat
Summary: Encapsulating natural bioactive compounds in porous support allows for sustained release of antioxidants and antimicrobial substances. In this study, date seed extract (DSE) was successfully encapsulated in mesoporous silica matrix (MCM-41) with an encapsulation efficiency of 91%. The DSE@MCM-41 nanocarrier demonstrated sustained release of antioxidants, extended shelf life of food, and significant and sustained bactericidal effect against Escherichia coli and Staphylococcus aureus.
Article
Materials Science, Multidisciplinary
Devaraju Subramani, Aruna Kumar Mohanty, Du-hyun Won, Hyun-jong Paik
Summary: A simple in situ sol-gel hybrid approach was used to enhance the mechanical stability and hydrophobic property of poly(3,4-ethylenedioxythiophene) (PEDOT) transparent conductive films (TCFs). PEDOT:P(SS-co-AMA)/silica hybrid films were prepared using thiol-ene click and sol-gel reactions with silane precursors. The hybrid films demonstrated improved hydrophobicity and mechanical stability due to the cross-linked silica network, perfluorooctyl moiety, and good compatibility between organic and inorganic phases. These PEDOT-silica hybrid films with excellent transparency, electrical conductivity, and hydrophobic and mechanical properties are suitable for durable optoelectronic device applications.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Anuradha Kamble, Suihua He, Jonathan R. Howse, Carwyn Ward, Ian Hamerton
Summary: For the first time, convolutional neural networks (CNN) were used to identify phase-separated microstructures in a novel nano-modified polymer composite. The CNN model achieved an accuracy of 65.4% and a 0.5 F1 score using an initial dataset, which was further improved to 80.1% accuracy and a 0.9 F1 score with additional experiments. The trained CNN model significantly reduced the time and cost required for manual screening and characterization.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Polymer Science
Devaraju Subramani, Aruna Kumar Mohanty, Du-hyun Won, Youngkun Hong, Hyun-jong Paik
Summary: This study reports the synthesis of a poly(3,4-ethylenedioxythiophene) (PEDOT) aqueous dispersion using sulfonated poly(ether sulfone) (SPES) with hydrophobic fluorinated groups to enhance the weather and water stability of conductive films. The conductivity and surface morphology of PEDOT:SPES thin films were investigated, and a 200-fold increase in conductivity was observed after N,N-dimethylformamide (DMF) treatment, with a transmittance over 96.5%. Raman spectroscopy revealed conformational changes in PEDOT chains due to the solvent treatment. In comparison to commercial PEDOT:poly(styrene sulfonic acid) (PSS), the PEDOT:SPES films showed improved water and weather stability in terms of dimensional stability. Furthermore, the PEDOT:SPES films were tested as hole transport layers in organic solar cells, achieving a good power conversion efficiency (3.36%), comparable to conventional PEDOT:PSS (AI 4083).
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Dominic R. Palubiski, Marco L. Longana, Janice M. Dulieu-Barton, Ian Hamerton, Dmitry S. Ivanov
Summary: This study proposes a repair methodology for interlaminar failure in composites using repairable vitrimer resin. By incorporating a vitrimer matrix into the damaged-prone region during manufacturing and utilizing vacuum pressure and heating, interlaminar failure can be repaired without introducing additional damage. The feasibility of incorporating reparable regions at the manufacturing stage has been successfully demonstrated, achieving higher performance than traditional repair methods.
MATERIALS & DESIGN
(2023)
Article
Polymer Science
J. F. Gargiuli, G. Quino, R. Board, J. C. Griffith, M. S. P. Shaffer, R. S. Trask, I. Hamerton
Summary: Four commercial high-performance aerospace aromatic epoxy matrices were evaluated in terms of their mechanical and thermal properties. The results showed that the thermoplastic toughened formulation exhibited improved overall stress values, while the particle-toughened sample displayed decreased stress values past the yield point. The resin with combined toughening agents performed similarly to the baseline material. Additionally, the dilation angles during plastic deformation were close to 0 degrees. The compressive modulus of the fully formulated resins was higher than that of the model resins, although it came at the expense of yield stress.
Article
Materials Science, Multidisciplinary
Subramani Devaraju, Aruna Kumar Mohanty, Du-hyun Won, Hyun-jong Paik
Summary: This work reports the fabrication of flexible and bendable transparent conducting electrodes (TCEs) using a hybrid of silver nanowires (AgNWs) and neutralized PEDOT:PSS. The TCEs showed good mechanical stability, optical and electrical properties, and potential for highly flexible electronic applications.
MATERIALS ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Yue Tang, Henry E. Symons, Pierangelo Gobbo, Jeroen Sebastiaan Van Duijneveldt, Ian Hamerton, Sebastien Rochat
Summary: A benzoxazine system combining liquid cardanol-based benzoxazine and an effective initiator with bisphenol A-based benzoxazine has been proposed. The mixture shows excellent fluidity and a relatively low peak polymerization temperature, and the cured polybenzoxazine exhibits high thermal decomposition temperature, moderate glass transition temperature, and robust mechanical strength comparable to the homopolymer obtained from curing bisphenol A-based benzoxazine.
ACS APPLIED POLYMER MATERIALS
(2023)