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
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
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
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
Chemistry, Physical
Artur Bukowczan, Konstantinos Raftopoulos, Krzysztof Pielichowski
Summary: A series of fibrous meshes based on liquid crystalline polyurethane/POSS composites were prepared. The influence of two different types of polyhedral oligomeric silsesquioxanes (POSSs) on fiber morphology, thermal properties, and mechanical properties was investigated.
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
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)
Review
Engineering, Chemical
Kaka Zhang, Shuaishuai Huang, Qi Zhang, He Zhu, Shiping Zhu
Summary: POSS-based coatings have gained significant attention for their unique structure and desirable properties. The integration of the inorganic POSS cage with organic functional groups allows for different approaches to blend them with polymers. The resulting coatings exhibit excellent mechanical, anti-wetting, anti-corrosive, icephobic, and fire-retardant properties. This review focuses on the latest developments in POSS-based functional coatings and discusses their challenges and future research directions.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
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
Kunal Mishra, Raman P. Singh
Summary: Polyhedral oligomeric silsesquioxane (POSS) is a nanoscale reinforcement that can modify the mechanical, thermal, and chemical properties of thermosetting polymers, such as epoxy resin systems. The inclusion of POSS in epoxy resin at higher loading introduces ductility in the fracture behavior of nanocomposites. The J-integral is used to quantify the fracture behavior and characterizes the crack growth resistance curve. Different nanocomposites are prepared by adding varying amounts of glycidyl POSS into DGEBF epoxy resin, and the fracture toughness experiments show that the addition of POSS improves crack initiation toughness and changes the failure behavior due to the development of POSS-POSS compliant domains. The increase in fracture resistance at higher POSS loading is due to shear yielding, while the increased fracture toughness at lower POSS loading is due to crack pinning and deflection.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Daisuke Iizuka, Masayuki Gon, Kazuo Tanaka, Yoshiki Chujo
Summary: Chemiluminescence, as a light source and excitation mediator without electric power sources, has attracted much attention. In this study, we investigated the influence of connection to the inorganic scaffold on chemiluminescence properties using coumarin-modified polyhedral oligomeric silsesquioxane (D1421-POSS). The results showed that the chemical emission reactions were accelerated by the POSS connection compared to the model compound D1421-arm. Cyclic voltammetry measurements revealed that D1421-POSS had a significantly lower oxidation potential than D1421-arm. Based on these findings, we proposed a mechanism in which aggregation assisted by the POSS core induces low oxidation potential, leading to the acceleration of chemiluminescence reactions.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Engineering, Environmental
Subinuer Abudukelimu, Gang Wei, Jia Huang, Gang Zhao, Li Wei, Wenguo Cui, Min Lu, Weiyan Yao
Summary: This study developed a novel polyhedral oligomeric silsesquioxane (POSS)-based nanoplatform for combination therapy of pancreatic cancer. The nanoplatform successfully combined a chemotherapeutic drug and a photothermal agent, showing significant synergistic effects in chemoresistant cancer cells. In a mouse model of pancreatic cancer, the nanoplatform effectively inhibited tumor growth without causing noticeable side effects. The prepared nanoparticles can be a promising strategy for the treatment of pancreatic cancer and other types of cancer.
CHEMICAL ENGINEERING JOURNAL
(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
Polymer Science
Jian Wang, Ruofan Xiao, Renying Liu, An Ping, Zhe Wang, Jikui Liu, Shumin Zhang, Yanmin Liu
Summary: This study focuses on the DC surface flashover characteristics of POSS/polyimide composite film in vacuum and reveals the influence mechanism of POSS molecular modification on the flashover characteristics. The results showed that the introduction of POSS increased the dielectric strength and flashover voltage of the composite film. The molecular modification also improved the overall properties of the film and enhanced its thermal conductivity.
