Article
Nanoscience & Nanotechnology
Haixiang Song, Qiqi Zhang, Yanwei Zhang, Yanfei Wang, Zhongyuan Zhou, Ping Zhang, Bingnan Yuan
Summary: The influence of 3-amino-polyhedral oligomeric silsesquioxane (NH2-POSS) on waterborne polyurethanes (WPU) was studied by synthesizing NH2-POSS modified WPUs. The addition of NH2-POSS improved the dispersion stability and thermal stability of WPU, while also enhancing hydrophobic properties.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Materials Science, Composites
Xiaodan Li, Wei Huang, Yan Sui, Guanhui Wang, Lin Xiao, Dongxing Zhang
Summary: By adding different amounts of MA0735 into novolac cyanate ester resin, novolac cyanate ester-polyhedral oligomeric silsesquioxane (POSS, MA0735) copolymers were prepared and analyzed for their curing behaviors and properties. The polymer with 0.5% MA0735 showed optimal comprehensive properties, combining heat resistance and impact toughness.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Wenyuan Zhang, Zijian Zheng, Jianfeng Huang, Zhaohong Shen, Boyou Hou, Meiyu Ji, Wenchao Zhang, Zhaolu Qin, Rongjie Yang
Summary: By combining boron nitride and polyhedral oligomeric silsesquioxane, researchers prepared an iron-containing polyhedral oligomeric silsesquioxane assembly that showed improved thermal conductivity, reduced dielectric constant, decreased heat release rate, and enhanced flame retardancy in epoxy composites.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Mayu Nagao, Taihei Hayashi, Hiroaki Imoto, Kensuke Naka
Summary: Dumbbell-shaped polyhedral oligomeric silsesquioxane (POSS) derivatives with unsymmetrical structures exhibit hybrid properties in solubility and thermal behavior, showing potential to improve the thermal degradation performance of compounds.
Article
Chemistry, Inorganic & Nuclear
Hua Zhong, Sixun Jiang, Lei Ao, Fan Wang, Feng Wang
Summary: Phosphorescent host-guest systems, which have intriguing properties and diverse applications, have attracted considerable attention. In this study, a functionalized metallotweezer receptor capable of noncovalent complexation with platinum(II) terpyridine compounds was designed and synthesized. The resulting heterometallic host-guest complexes exhibited enhanced phosphorescent emission and could assemble into nanospheres. When a specific complementary guest was used, the system showed phosphorescent solvatochromic behaviors.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Nsenda Ngenda Tshilumbu, Veruscha Fester
Summary: This study investigated the stability of water-in-oil super-concentrated emulsions used as pumpable explosives. The use of Polyhedral Oligomeric Silsesquioxane (POSS) as a co-surfactant in place of conventional co-surfactants was found to stabilize the emulsion and prevent crystallization. The presence of POSS created a reinforced interfacial skin, leading to improved stability under high shear conditions and during storage.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Mathilde Laird, Niklas Herrmann, Naseem Ramsahye, Cedric Totee, Carole Carcel, Masafumi Unno, John R. Bartlett, Michel Wong Chi Man
Summary: This study reports an unprecedented, single isomer styryl-functionalized T-18 POSS, which has been unambiguously identified among nine possible isomers using multinuclear solution NMR, MALDI-MS, FTIR, and computational studies. A ring-strain model was developed to predict the speciation of non-equivalent Si atoms in other T-n compounds, demonstrating its general applicability and usefulness for predicting Si-atom environments.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
T. Li, Y. Sun, H. Y. Dai, J. Chen, R. Z. Xue, D. W. Liu, M. M. Wang
Summary: A series of PI/POSS hybrid films with low dielectric constants and excellent comprehensive properties have been successfully prepared by incorporating different proportions of POSS into the polyimide precursors. An appropriate amount of POSS doping can effectively improve the optical and dielectric properties, while excessive doping can reduce dielectric properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Yang-Chin Kao, Wei-Cheng Chen, Ahmed F. M. EL-Mahdy, Meei-Yu Hsu, Chih-Hao Lin, Shiao-Wei Kuo
Summary: In this study, a difunctionalized cyanate ester double-decker silsesquioxane (DDSQ-OCN) cage was prepared to improve the thermal behavior of epoxy resin. The covalently bonded network structure formed by the copolymerization of epoxy and OCN units, as well as the hydrogen bonding between the OH groups of epoxy and the SiOSi moieties of DDSQ units, enhanced the physical properties of the material. The addition of Cu(II)-acac accelerated the thermal polymerization process but decreased the thermal stability.
Article
Nanoscience & Nanotechnology
Po Hu, Jinhong Li, Junchao Jin, Xiao Lin, Xiaodi Tan
Summary: By introducing eight methacryl polyhedral oligomeric silsesquioxane (Ma-POSS), the holographic performance of phenanthraquinone-doped poly(methyl methacrylate) (PQ/PMMA) is dramatically enhanced, with high sensitivity, high diffraction efficiency, and neglectable volume shrinkage. Ma-POSS increases the photosensitivity, diffraction efficiency, and suppresses volume shrinkage. The molecular weight of PQ/PMMA is increased by grafting PMMA into star-shaped macromolecules. The residual C=C of POSS-PMMA significantly enhances the photosensitivity and the star-shaped POSS-PMMA acts as plasticizer to improve the mechanical properties and reduce the photoinduced volume shrinkage.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Po Hu, Jinhong Li, Junchao Jin, Xiao Lin, Xiaodi Tan
Summary: By introducing methacryl polyhedral oligomeric silsesquioxane (Ma-POSS), the holographic performance of phenanthraquinone-doped poly(methyl of high sensitivity, high diffraction efficiency, and neglectable volume shrinkage for holographic data storage has been dramatically enhanced. Ma-POSS significantly increases the photosensitivity by 5.5 times and improves diffraction efficiency by more than 50%, while suppressing volume shrinkage over 4 times. The molecular weight is increased by grafting PMMA to be a star-shaped macromolecule, and the residual C=C of POSS-PMMA enhances the photosensitivity. The addition of star-shaped POSS-PMMA as a plasticizer further enhances the mechanical properties and reduces photoinduced volume shrinkage.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Salih Ertan, Murat Kaya, Atilla Cihaner
Summary: A new analog of poly (3,4-propylenedioxythiophene) conjugated polymers called PProDOT-POSS was reported, with integrated POSS nanocage structure. The polymers were synthesized via both chemical and electrochemical methods, soluble in common organic solvents, exhibited fluorescent property, and had an optical bandgap of 1.95 eV.
Article
Materials Science, Multidisciplinary
Yudi Zhao, Manlin Yuan, Litong Wang, Xin Lu, Zhong Xin
Summary: In this study, a bio-based benzoxazine monomer was synthesized using a solvent-free method and pyrogallol was used as a curing catalyst. The resulting PC-s/py/POSS nanocomposites showed good thermal stability and water resistance, as well as low curing temperature and dielectric constant, making them promising for low dielectric applications in microelectronic materials.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Bo Pang, Yuan Liu, Rong Cao, Wangqing Zhang
Summary: Organic-inorganic hybrid vesicles of POSS-(PNIPAM-b-PS)(8) were synthesized and exhibited good thermal stability and high mechanical strength, maintaining structural integrity in the dried state. These vesicles can be used as thermal insulation materials with low thermal conductivity.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
B. Zhao, G. Hang, L. Li, S. Zheng
Summary: This study reports the transformation of linear polyethylene-polyhedral oligomeric silsesquioxane (PE-POSS) copolymers into PE vitrimers through silyl ether metathesis. The cross-linking reaction occurs within the POSS microdomains and significantly affects the morphologies, thermal, and mechanical properties of the materials. The cross-linked PE products exhibit self-adaptivity and shape memory properties.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Engineering, Environmental
Govindraj Latha, Arumugam Hariharan, Pichaimani Prabunathan, Muthukaruppan Alagar
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2020)
Article
Materials Science, Multidisciplinary
M. Nithya, M. Alagar, B. Sundaresan
Article
Polymer Science
Siraimeettan Kurinchyselvan, Ayyavu Chandramohan, Arumugam Hariharan, Ponnaiah Gomathipriya, Muthukaruppan Alagar
Summary: Two different benzoxazine monomers were synthesized and their molecular structures confirmed using spectroscopy tools. The thermal stability of the nanocomposites was increased by reinforcing with functionalized MCM-41 and the dielectric properties were studied, showing ultra-low dielectric constant values. These hybrid composites can be used as adhesives, sealants, and encapsulants in high-performance microelectronics applications.
Article
Polymer Science
Vengatesan M. Rangaraj, Swati Singh, Subramani Devaraju, Vijay S. Wadi, Saeed Alhassan, Dalaver H. Anjum, Vikas Mittal
JOURNAL OF APPLIED POLYMER SCIENCE
(2020)
Article
Polymer Science
S. Devaraju, K. Krishnadevi, E. Naveena, M. Alagar
Summary: In this study, a high thermal and flame-retardant polybenzoxazine-silica hybrid material was synthesized using renewable raw materials. The thermal and flame-resistant properties of the material were significantly improved, making it a suitable alternative to petroleum-based polymeric materials for better thermal and flame-resistant applications.
Article
Chemistry, Applied
Vengatesan M. Rangaraj, K. Rambabu, Fawzi Banat, Vikas Mittal
Summary: The study utilized date-fruit syrup waste extract as an antioxidant additive to develop active gelatin films with enhanced food preservation properties. The results showed that the gelatin films containing DSWE significantly inhibited oil oxidation and prolonged the shelf life of food products.
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
Food Science & Technology
Vengatesan M. Rangaraj, K. Rambabu, Fawzi Banat, Vikas Mittal
Summary: Developing edible active food packaging films with natural antioxidants and nanofillers ensures the safety and sustainability of food, extending its shelf-life. However, challenges such as safety, economic viability, and environmental impact still exist in this field.
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
Polymer Science
Salendra Sriharshitha, Krishnamoorthy Krishnadevi, Subramani Devaraju, Dakshinamoorthy Prasanna
Summary: In this study, a new strategy was explored to develop bio-based poly(E-aee-co-MA) materials for intrinsic autonomous self-healing applications. The developed materials exhibited good and repeated self-healing ability due to the supra-molecular action and hydrogen bonding interactions in the network structure. The study provides insights into the development of eco-friendly self-healing polymers.
JOURNAL OF POLYMER RESEARCH
(2022)
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
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
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)
