EUROPEAN POLYMER JOURNAL
·
2017
·
IF 3.531
Bingjie Zhao,Lin Cheng,Yiling Bei,Suxi Wang,Jinhua Cui,Hongxia Zhu,Xu Li,Qingzeng Zhu
A series of N-POSS-substituted polybenzimidazole (POSS- g -PBI) bearing polyhedral oligomeric silsesquioxane (POSS) pendant moieties were synthesized. X-ray powder diffraction analyses and Scanning electron microscope characterization revealed that POSS was dispersed well in the polybenzimidazole matrix. The grafted POSS pendant moieties can break the PBI intermolecular face-to-face packing and hydrogen bonding. As a result, POSS- g -PBIs showed better solubility than the pure polybenzimidazole because of less tight molecular chain packings. The intrinsic viscosity of POSS- g -PBI in a DMSO solution decreased with increasing amounts of grafted POSS in the polybenzimidazole molecular chains. The mechanical properties, including Young’s modulus, breaking strength and elongation at break, increased by introducing POSS into the polybenzimidazole backbone. Contact angle tests showed that the surface of POSS- g -PBI became hydrophobic with increasing amounts of grafted POSS. POSS- g -PBIs also exhibited good thermal stability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2018
·
IF 5.16
Fang Wang,Yadong Wu,Yudong Huang,Li Liu
Mechanical performance, transparency and thermal stability still remain the dominating constraints for the application of polymeric composite membranes. Thus, the research and development of co-effectively strong, transparent and heat-resistant membranes are necessary and significant for promoting practical outcomes. POSS NPs is incorporate into the structure of aramid nanofibers (ANFs) to synthesize the ANFPs nanocomposite membranes with different amounts of POSS by vacuum-assisted flocculation . FT-IR and XPS were applied to characterize the structure of composite membranes . Upon the addition of POSS, the surface topological structures of composite membranes were not affected, and they retained excellent transparency and flexibility. The mechanical properties of ANFPs membranes could be altered by changing the POSS content, in which the POSS served as a cross-linking agent between nanofibers, and ANFPs composite membrane presented the optimal tensile strength with 6 wt% POSS embedding in the nanocomposite. Besides the excellent mechanical performance and transparency, the unique thermal assets of ANFs and POSS further enabled the membranes with high thermal stability. Based on these results, it could be concluded that the ANFPs membranes developed here might provide the alternative materials for the practical application of strong, transparent and heat-resistant membrane.
研究领域:
材料科学
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纳米技术
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高分子科学
·
复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2026
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IF 3.1
Rui Chen,Liangliang Cao,Long Zhang,Huadong Fu,Yan Qin
In response to the stringent requirements for lightweight and high-performance materials in the field of aerospace ablative thermal protection, phenolic aerogels, despite their advantage of low density, have insufficient thermal insulation and ablation resistance to meet the service demands in extreme environments. In this study, POSS-modified phenolic aerogels were prepared via the ring-opening grafting reaction between polyhedral oligomeric silsesquioxane (POSS) and phenolic resin, combined with the sol–gel method. The resulting aerogels exhibit a specific surface area of 103.9 m 2 /g and the temperature at the maximum weight loss rate up to 843.85 K. Additionally, the thermal conductivity of P-E-10 decreases from 0.119 W/(m·K) to 0.091 W/(m·K). Their excellent thermal insulation performance was verified through a self-designed thermal insulation experiment and COMSOL simulation. Under the ablation of a butane torch flame with a heat flux of approximately 100 kW/m 2 and a central temperature of approximately 1373.15 K, the material demonstrates efficient ablation resistance, with a linear ablation rate as low as 7.75 μm/s. In conclusion, POSS-modified phenolic aerogels exhibit broad application prospects with high competitiveness in the field of ablative thermal protection in the future.
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Wenxiu Chen,Youzhi Zeng,Zaoxia Wen,Linxuan Fang,Lianbin Wu
A trifunctional methacrylate monomer (REM) was synthesized from biomass resveratrol to address the need for sustainable resins in digital light processing (DLP) 3D printing. The polymer properties were optimized by incorporating methacryloxypropyl polyhedral oligomeric silsesquioxane (MA-POSS) with different mass fractions. Light-curing biobased materials (REM/POSS) exhibited enhanced thermal stability and dielectric properties. The REM/POSS-30 % composite showed a low dielectric constant ( D k = 2.90 at 14.2 GHz) and excellent thermal stability. Compared to commercial bisphenol A-based resins (MEP), REM/POSS-0 % demonstrated superior comprehensive performance. The stilbene structure of resveratrol in REM/POSS polymers provided strong blue fluorescence under UV light, suggesting potential for information storage and encryption. The successful fabrication of complex structures confirmed the compatibility of REM/POSS with DLP 3D printing, offering a promising alternative to petroleum-based materials in both 3D printing and anti-counterfeiting applications.
研究领域:
材料科学
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高分子化学
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3D打印技术
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光学材料
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安全与防伪
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Xianhong Chen,Ling Liang,Weida Hu,Haiyang Liao,Yongqi Zhang
Traditional lithium-ion batteries based on liquid electrolytes cannot adapt to the increasing and various highly flexible requirements. In this work, a confinement-driven strategy has been developed to confine the ionic liquids in a polyhedral oligomeric silsesquioxanes (POSS) and poly(ethylene glycol) diacrylate (PEGDA) hybrid cross-linked poly(ionic liquid)s ionogel (POSS-CPIL-n), which endows this novel electrolyte superior flame retardancy and dramatically flexibility. The POSS-CPIL-n ionogel renders exceptional flexibility (bend, fold and twist) and desired mechanical properties (2.5 MPa). Advantageous for high dissociation of lithium salt , high ionic conductivity (2.5 mS cm −1 at 25 °C) and considerable lithium ion mobility (0.51) are provided. Thanks to the flexibility of ionogel electrolyte together with excellent thermal and electrochemical stability, the LiFePO 4 ||Li cell based on POSS-CPIL-n exhibits significant rate performance and cycling stability, the capacity of the cell can reach to 100 mAh g −1 at 4 C and maintain a substantial discharge capacity of 160.5 mAh g −1 after 200 cycles at 0.2C. Furthermore, the soft-package assembled with POSS-CPIL-n can successfully charge a cell phone and continue to supply power stably even when the battery is exposed to the air, which indicates that POSS-CPIL-n has a promising potential application in high safety flexible electronic devices.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 14
·3950
·
IF 3.623
Abeer Alassod,Syed Rashedul Islam,Mina Shahriari Khalaji,Rogers Tusiime,Wanzhen Huang,Guangbiao Xu
Compositing is an interesting strategy that has always been employed to introduce or enhance desired functionalities in material systems. In this paper, sponges containing polypropylene, lignin, and octavinyl-polyhedral oligomeric silsesquioxane (OV-POSS) were successfully prepared via an easy and elegant strategy called thermally induced phase separation (TIPS). To fully explore the behaviour of different components of prepared sponges, properties were characterized by a thermogravimetric analyser (TGA), differential scanning calorimetry (DSC), Fourier transform infrared measurement (FTIR), and scanning electron microscopy (SEM). Furthermore, wettability properties toward an organic liquid and oil were investigated. The FTIR analysis confirmed the chemical modification of the components. TGA and DSC measurements revealed thermal stability was much better with an increase in OV-POSS content. OV-POSS modified sponges exhibited ultra-hydrophobicity and high oleophilicity with water contact angles of more than 125°. The SEM revealed that POSS molecules acted as a support for reduced surface roughness. Moreover, OV-POSS-based blend sponges showed higher sorption capacities compared with other blend sponges without OV-POSS. The new blend sponges demonstrated a potential for use as sorbent engineering materials in water remediation.Keywords:lignin;polypropylene;sponges;hydrophobic;sorption;thermal stability
研究领域:
材料科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2024
·Vol. 59
·期 23
·10248-10263
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IF 3.5
Zhu Chuanren,Zhang Tong,Su Qing,Wei Zhimei,Wang Xiaojun,Long Shengru,Zhang Gang,Yang Jie
Films with low dielectric constants have broad prospective applications in microelectronic devices. In this study, octavinyloctasilasesquioxane (POSS) was grafted with fluorinated long carbon chains on its eight vertices by clicking reaction. The successful synthesis of fluorinated POSS (F-POSS) was confirmed by NMR, FT-IR, and XPS analyses. Then, the F-POSS/poly (arylene sulfide sulfone) (F-POSS/PASS) composite films were fabricated via solution casting. When 15 wt.% of F-POSS was added, the dielectric constant of the F-POSS/PASS film at 1 MHz decreased from 3.52 to 2.65, while the Tan δ value dropped from 1.18*10 –2 to 9.32*10 –3 , respectively. The developed F-POSS/PASS film showed excellent hydrophobicity (water contact angle of 120.3°) which was attributed to the fluorinated long carbon chains. In addition, the optimized F-POSS/PASS film also exhibited good mechanical properties (tensile strength 66.87 MPa), promising thermal stability, and flame-retardant property. Given the above-mentioned excellent properties, the F-POSS/PASS composite films will have great potential in the fabrication of microelectronic devices. Graphical abstract
研究领域:
材料科学
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微电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 14
·8528-8543
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IF 4.22
Wang Junchao,Zhang Zetian,Xie Taoling,Sun Liying,Yang Kaifeng,Liu Yang,Li Zhengjun
Polyhedral oligomeric silsesquioxanes (POSSs) can be utilized to prepare nanocomposites to improve their physical and mechanical properties significantly by physical interaction and chemical cross-linking. The purpose of this work is to prepare a kind of water-dispersive POSS containing multiple epoxy groups and then use it to prepare gelatin/POSS nanocomposites to enhance their thermal and mechanical properties. Accordingly, 3-glycidyloxypropyl-POSS (G-POSS) was synthesized by a complete hydrolysis and condensation method. Then, G-POSS was modified with polyetheramine to obtain a derivative material of POSS, denoted as P-G-POSS, which possess better water dispersion and flexibility. Importantly, the chemical structure of both G-POSS and P-G-POSS was confirmed by FT-IR, NMR, XPS and EDS analyses. Subsequently, POSS/gelatin nanocomposites were prepared in accordance with 1:1, 2:1 and 3:1 of epoxy/amino mole ratios in alkaline aqueous medium. The microscope porous structure, thermal stability, mechanical properties, along with water absorption of the composites containing various contents of P-G-POSS, were emphatically studied and discussed. The results indicated that composites possessed the maximum denaturation temperature up to 80.1 °C, as well as the increased initial decomposition temperature and residual mass at 700 °C, and particularly improved mechanical properties after incorporation of P-G-POSS into gelatin matrix. The reason is likely that the cross-linking reaction of epoxy groups in P-G-POSS with amino groups in gelatin macromolecules, along with hydrogen bonding, played an important role in the as-prepared gelatin/POSS composites. This study would be helpful to promote the application of POSSs in bone tissue regeneration and leather cleaner production.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Zian He,Junwen Xie,Ziwei Liao,Yingyi Ma,Mingyan Zhang,Wenlong Zhang,Hongyan Yue,Xin Gao
Low-dielectric-constant materials are in great demands to satisfy the requirements in microelectronics. In this study, polyhedral oligomeric silsesquioxanes (POSS) contained hierarchical porous structure, which was prepared by the self-assembly of water droplets, was used as a coating for flat polyimide (PI) film. Evident declines were found in dielectric constant and water uptake upon the introduction of the hierarchical porous coating due to the existence of fluorine-containing groups, POSS and the hierarchical porous structure. In addition, almost undamaged mechanical properties were shown when the dielectric and water resistance properties were optimized because the hierarchical porous structure was used as a coating but not the bulk of the PI film. When the content of POSS varies from 10 % to 50 %, low dielectric constants of 2.42–2.75 and low water uptakes of 0.60 %– 0.67 %, with 22 %–27.63 % and 75.96 %–78.43 % of reductions were obtained, compared to 3.36 of dielectric constant and 2.80 % of water uptake for flat PI film. More importantly, the stability of dielectric properties in humid environment was verified by only 2.94 %–4.83 % of increase in dielectric constant after exposing to high humidity for more than 25 h, compared to 9.43 % of increase for flat PI film. The present study provides a versatile method for the preparation of low-dielectric-constant polymer materials with comprehansive properties.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Hui Li,Songsong Tang,Qingqing Zhou,Wei Chen,Xixue Yang,Tieling Xing,Yan Zhao,Guoqiang Chen
Fluorinated polyhedral oligomeric silsesquioxane (F-POSS) is one of the most popular candidates at present for superhydrophobic coating. Because of its ultralow surface energy, F-POSS has usually been dissolved with expensive fluoro-solvents, and the melting temperature of F-POSS is not high (122–140 °C), which will cause its loss during use. So trying to polymerize/crosslink F-POSS molecules and/or directly graft F-POSS to substrate is important. In this work, we report the SI-eATRP grafting of methacryl POSS (MA-POSS) on cotton and the subsequent amine catalyzed thiol-methacrylate Michael addition reaction of poly(MA-POSS) with 1H, 1H, 2H, 2H-perfluorododecyl-1-thiol (PFDT) for the fabrication of a durable poly(MA-POSS)-PFDT coating. The cotton fabric coated with poly(MA-POSS) was nearly superhydrophobic after 4 h of SI-eATRP process under potentiostatic condition of −0.40 V. Although the water contact angle (WCA) was ~148°, water droplets tended to adhere to the cotton fabric surface even when the fabric was turned upside down. After fluorination , WCA was increased to ~160°, and water drops could slide off when the fabric was slightly tilted. The sliding angle (SA) was ~10°. The as-prepared poly(MA-POSS)-PFDT coating was durable against repeated washing and physical abrasion. After 30 accelerated washing cycles (equals to 150 home laundering cycles), the coated fabric still showed superhydrophobicity. After 800 abrasion cycles over sandpaper, the WCA was still as high as 149°. In addition, the coated fabric had self-healing ability and could restore its superhydrophobicity after plasma etching through heat treatment. After 10 cycles of plasma etching and heat-induced healing process, the WCA of the coated fabric kept at ~154°. Such a durable superhydrophobic fabric coating may find applications in the development of functional clothing for a variety of purposes.
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2018
·
IF 6.759
Wei Li,Lei Hui,Bing Xue,Chuanding Dong,Yuming Chen,Linxi Hou,Binbo Jiang,Jingdai Wang,Yongrong Yang
A Polyhedral oligomeric silsesquioxane (POSS) modified Ziegler-Natta catalyst is reported to synthesize the weakly entangled ultra-high molecular weight polyethylene at a high temperature and with a high activity. Incorporation of POSS can form numbers of aggregates with a mean size of 48 nm adsorbing on the surface of SiO 2 . The structure of nanoaggregates is evidenced by the experiments and theoretical calculations where one POSS can coordinate with multiple MgCl 2 molecules serving as an electric donor to the further immobilized TiCl 4 . The catalyst is thus featured by two distinct active regions positioned in the POSS/MgCl 2 nanoaggregates and δ -MgCl 2 , respectively. The former regions present extremely low activity on ethylene polymerization, which function as horizontal separators for isolating the active TiCl 4 sites and the growing chains. This catalyst exhibits an exceptional activity ( i.e. 1.3 × 10 6 gPE mol Ti −1 h −1 bar −1 ) for the synthesis of weakly entangled polyethylene at 60 °C.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Yu Cao,Gan Tao,Wei Li,Chuanding Dong,Jingdai Wang,Yongrong Yang
Manipulating the interplay between electron donor and catalytic species is a major approach of optimizing Ziegler-Natta catalysts. To this end, it is essential to reveal the correlation between the involved dynamic processes. In this work, a greatly enhanced mobility of the internal donor tetrahydrofuran (THF) is realized even at room temperature in the MgCl 2 substrate modified with MgCl functionalized polyhedral oligomeric silsesquioxane (POSS-MgCl). A series of spectroscopic characterizations evidence that, thanks to the high mobility of THF, the immobilization of catalytic Ti species and the migration of THF occurs synchronously and leads to a nearly homogenous distribution of Ti sites. In addition, the incorporation of POSS-MgCl promotes the formation of 4-coordinated Mg sites in the substrate. The modified Ziegler-Natta catalyst shows the remarkable performance toward ethylene polymerization, featured by the high catalytic activity (21.6 × 10 6 g PE(mol Ti·h) −1 ) as well as a narrow polydiversity index (3.1) of the synthesized polyethylene. Based on these results, we propose that the Ti immobilization process is directly modulated by the THF migration in this system, which reduces the aggregation of TiCl 4 and enhances the formation of active species.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）