Advanced Materials Interfaces
·
2021
·Vol. 8
·期 24
·2100458
·
IF 6.147
Xiaoyan Song,Zhen Wang,Fangzheng Zhao,Yizhe Sun,Bowen Cheng,Jinfeng Xing
In this study, a polyimide/aminopropyllsobutyl polyhedral oligomeric silsesquioxane (PI/A-POSS) membrane with a novel 3D thermal crosslinking structure is prepared by electrospinning and subsequent imidization. Compared with the pure PI membrane, PI/A-POSS composite membranes present better mechanical properties, narrower distribution of pore size, smaller average pore size, and better thermal stability. When A-POSS content is 3 wt%, the composite membrane (A3) has outstanding electrolyte uptake, excellent ionic conductivity, low interfacial resistance, and the high electrochemical stability of anode. The battery assembled with the A3 separator has an excellent first discharge capacity of 137.8 mAh g −1 and its capacity retention rate is still as high as 76.49% after 100 cycles at 2.0 C. Furthermore, battery assembled with the A3 separator shows excellent rate capacity with a relatively high discharge capacity up to 169.7 mAh g −1 at 0.2 C and a superior capacity recovery rate of 98.06% at 30 °C. Especially, the battery assembled with the A3 separator shows more prominent rate capacity with an excellent first discharge capacity up to 180.5 mAh g −1 at 0.2 C and a superior capacity recovery rate of 95.79% at 60 °C.
研究领域:
材料科学
·
能源存储与转换
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Zhen Li,Xiaofeng Hao,Geng Cheng,Sheng Huang,Dongmei Han,Min Xiao,Shuanjin Wang,Yuezhong Meng
Polyhedral oligomeric silsesquioxane (POSS) has attracted increasing attention because of its organic/inorganic, nanosize, easily functional nature, especially in the applications of direct methanol fuel cells (DMFCs). In this work, we have successfully synthesized a novel bifunctional POSS ( Vi -POSS-SO 3 Na) with vinyl and sulfonic acid groups by thiol-ene click reaction. Vi -POSS-SO 3 Na was introduced into Nafion® matrix and cross-linked by in-situ simply thermal treatment. The implantation of the bifunctional POSS filler gives significant improvements in the performance of such proton exchange membranes (PEMs). The cross-linked hybrid membrane with 12 wt% of Vi -POSS-SO 3 Na ( X -Nafion@POSS-12) has a high proton conductivity (121 mS cm −1 ) at 80 °C, excellent dimensional stability and the lowest methanol permeability (5.4 × 10 −8 cm 2 s −1 ). The highest power density of the DMFCs was obtained by using the X -Nafion@POSS-12 as PEM in DMFC at 80 °C, and its value (34.93 mW cm −2 ) is twice higher than that of Nafion 212 membrane (14.90 mW cm −2 ). The novel in-situ fabrication method gives a simple and potential approach for the preparation of PEMs used in DMFCs.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 7
·2945-2953
·
IF 2.817
Gong Xiaodong,Luo Huan,Liu Gang,Luo Cong,Niu Yanhua,Li Guangxian
The gel polymer electrolytes (GPEs) with poly(acrylonitrile-polyhedral oligomeric silsesquioxane)/poly(vinylidene fluoride) (PAN-POSS/PVDF) blends as free-standing porous membrane and ionic liquid (IL) as absorption substance were successfully prepared. By tuning the content of PAN-POSS, the porosity and absorptivity of the blended membranes could be regulated. Due to the higher porosity and absorptivity, the ionic conductivity of GPEs with 15 wt% PAN-POSS reaches to 1.91 × 10 −3 S cm −1 at 20 o C. Meanwhile, the electrolytes also show excellent mechanical properties, thermal stability, and fire resistance. More importantly, the high electrochemical window of 4.6 V (vs. Li/Li + ) has been acquired and the testing cells with Li metal anode and LiFePO 4 cathode show a tolerable rate performance. Such prepared GPEs are expected to be applied to lithium batteries with high safety and electrochemical performance.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 2
·e54793
·
IF 3
Kaiqi Fan,Sen Liu,Wenbo Feng,Wentong Yang,Jiwei Peng,Ruixue Liu,Shaoming Fang,Xiaojing Zhang
Conductive hydrogels can be utilized in the field of flexible supercapacitors due to their stretchable properties and high ionic conductivity. However, many of the conductive hydrogels lose their stretchability and conductivity at subzero temperatures. Herein, a novel Janus POSS-based hydrogel electrolyte that shows excellent flexibility and ionic conductivity at low temperatures is designed and prepared by the copolymerization of acrylamide and a water-soluble Janus-type polyhedral oligomeric silsesquioxane (AS-POSS) containing sodium sulfonate groups and double bonding groups. The sodium sulfonate groups of AS-POSS and LiCl endow the hydrogel electrolyte with excellent anti-freezing ability. Simultaneously, the double bonding groups of AS-POSS enable a successful POSS crosslinking in the polymer network, resulting in a highly stretchable hydrogel electrolyte (1445%) with high ionic conductivity (0.067 S cm −1 ) at −20°C. Thereafter, the all-in-one flexible supercapacitor is prepared by in-situ polymerization of aniline. Based on the exceptional anti-freezing properties of the Janus POSS-based hydrogel electrolyte, the all-in-one supercapacitor exhibits stable electrochemical performance (>90% capacitance retained under deformation at −20°C) and excellent cycling stability (only 19.7% capacitance decay over 2000 charge/discharge cycles at −20°C) at low temperatures. The Janus POSS-based hydrogel electrolyte is expected to be a promising gel electrolyte for an all-in-one supercapacitor that resists freezing.
研究领域:
材料科学
·
能源存储
·
纳米技术
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产品关联
DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 18
·2558
·
IF 4.9
Qiming Huo,Zhuo Lv,Shengyu Feng,Dengxu Wang,Hongzhi Liu
The development of a straightforward strategy for preparing organic fluorescent materials, fine-tuning white-light emission, and subsequently constructing white light-emitting diodes (LEDs) is of great significance. Herein, we report on the modulation of white-light emission and the fabrication of white LEDs using polyhedral oligomeric silsesquioxane (POSS)-based fluorescent hybrid porous polymers (HPPs) through simple physical blending. Two HPPs, namely HPP-1 and HPP-2, which emit blue and red light, respectively, were synthesized via the efficient Heck reactions of octavinylsilsesquioxane with 4,4′-dibromobiphenyl and 1,3,6,8-tetrabromopyrene. By physically doping of HPP-1 and HPP-2 in variable ratios in solvent suspensions, it was discovered that white-light emission is significantly influenced by the concentrations of the materials and the excitation wavelength. Similar findings were also observed in the solid-state physical doping. An ideal white light emission with a CIE coordinate of (0.33, 0.33) can be achieved when excited at 380 nm with a mass ratio of HPP-1 to HPP-2 of 1:2. Finally, the two HPPs were dispersed in polysiloxane matrices, and a white LED with a CIE coordinate of (0.42, 0.36) was obtained. The LED exhibited a color rendering index of up to 90 and a correlated color temperature of 2858 K, realizing warm white light emission. This simple and convenient white-light regulation strategy holds great promise for application in the development of novel white LEDs based on organic fluorescent porous materials.
研究领域:
材料化学
·
光电子学
·
高分子科学
·
发光材料
·
固态照明
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xiaoling Xu,Bin Peng,Yanqiu Wang,Yaqi Dong,Hui Wang,Wentong Chen,Yan Liu,Qiang Zhang
The incorporation of polyhedral oligomeric sesquisiloxane (POSS), a distinctive nanoparticle, into the membrane separation layer represents an effective strategy for enhancing the chlorine resistance of membranes. This modification contributes to both the durability of the membrane and its separation efficiency. However, POSS is easy to agglomerate, which affects the separation performance of the membrane. In this paper, POSS-centered polyhydroxy polymer (OMEPOSS-P(GMA-NMDG)) was synthesized via photo-induced atom transfer radical polymerization and used as water-soluble monomer to prepare polyester separation layer on porous substrates through interfacial polymerization with trimelanoyl chloride. The obtained POSS-centered polyester membrane exhibits a high dye removal rate exceeding 99 %, and it can realize the screening of dye molecules with different molecular weight and different charge. Notably, the membrane demonstrates excellent chlorine resistance, maintaining effective separation efficiency after exposure to sodium hypochlorite solutions at concentrations of 10 000 ppm for 96 h and 1000 ppm for 7 days. It is worth noting that the membrane showed high anti-fouling performance. This method provides a useful guideline for the development of chlorine-resistant and anti-fouling separation membranes.
研究领域:
材料科学
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分离技术
·
环境工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Qian Liu,Liulin Wei,Xiaomei Chen,Xueyun Gao,Jingchan Zhao
In this work, we rationally designed a facile dispersible and self-collectible nano-adsorbent GR@p(POSS-co-DMAEMA) to simplify the dispersive solid-phase microextraction (DSPME). The difficulty of allowing close contact between the nano-adsorbent and donor sample solution was solved, thus improving the extraction efficiency. Furthermore, the GR@p(POSS-co-DMAEMA) with temperature-sensitive property can self-collect at high temperature, simplifying the DSPME steps (7 min). Fabrication and dispersity of GR@p(POSS-co-DMAEMA) were certified by characteristic analyses. Based on above, a method for analyzing four parabens by GR@p(POSS-co-DMAEMA)-DSPME combined with HPLC-UV was established. The feasibility of the method was verified in simulated water targeting four parabens with good precision (RSD%, 1.7–11.3, n = 3) and low detection limits (0.29–0.63 ng mL −1 ) under optimal conditions. The method was successfully applied to analyze three condiments and obtained relative recoveries between 91.20 and 133.71%. The results showed that the proposed method is promising to be a fast, efficient and reliable method for the trace analysis of parabens.
研究领域:
分析化学
·
食品科学
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产品关联
DOI
高影响因子
E-POLYMERS
·
2022
·Vol. 22
·期 1
·357-369
·
IF 3.074
Xing Huang,Guomin Song,Jianjun Shi,Jiafei Ren,Ruilu Guo,Chunyuan Li,Guangxin Chen,Qifang Li,Zheng Zhou
Octa(dimethylethoxysiloxy) POSS (ODES) was synthesized successfully and used as the novel curing agent to prepare RTV silicone rubber (SROD) with outstanding mechanical properties and thermal stability. Compared with the silicone rubber cross-linked by tetraethoxysilane (SRTE), the novel RTV silicone rubber using octa(dimethylethoxysiloxy) POSS as a cross-linker had better mechanical, thermal, and optical properties. The highest tensile strength of SROD reached 1.26 MPa, which is three times that of SRTE. Besides, the decomposition temperature of 10% weight loss reached 507.7°C, exceeding that of SRTE by nearly 150°C. In addition, it was remarkable that due to the good compatibility of ODES with the silicone rubber matrix, the series of SROD showed good transmittance, greater than 87%. The thermal decomposition process of SROD was investigated by TGA coupled with real-time FTIR, and the results revealed the rigid structure and large steric hindrance of ODES that efficiently blocked the “backbiting” of the polysiloxy chains and delayed the end-induced ring decomposition, and consequently, improved the thermal stability of SROD significantly.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2025
·
IF 4.3
Yanan Sun,Hengzhi You,Chengyang Hong,Feng Ge,Hao Liu
This study investigates the influence of chain length on the crystalline structure and thermodynamic behavior of side-chain polyhedral oligomeric silsesquioxane (POSS)-containing homopolymers. A series of precisely synthesized POSS-containing polymers with exact chain lengths was prepared using precision chemistry. Comprehensive characterization revealed that the covalent attachment of crystalline POSS cages to the polymer backbone confined their crystallization to a 2D lattice, fundamentally distinct from the chain-folding mechanism of conventional polymers. Polarized optical microscopy confirmed the absence of birefringence during crystallization, consistent with this constrained geometry. Differential scanning calorimetry demonstrated that the melting temperature systematically increased with longer chain lengths, attributed to reduced configurational entropy in the molten state, but remained invariant with isothermal crystallization temperature for each sample. Crystal structure analysis confirmed identical interlamellar spacing and crystalline packing across different chain lengths, supporting a model where POSS cages form crystalline bilayers sandwiching the incompatible polyester backbone layer. These findings provide robust experimental validation for the 2D lattice crystallization model in POSS-containing polymers and establish precise molecular design as a key strategy for tailoring the hierarchical organization and thermal properties of hybrid nanocomposites.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Yinbo He,Xinliang Li,Yuehai Shao,Mingliang Du
Deep drilling often faces high-temperature and high-salt environments. Bentonite/water-based drilling fluids (BT/WBDFs) suffer serious fluid loss. Polyhedral oligomeric silsesquioxane (POSS) is introduced to synthesize a hybrid fluid loss additive (PAAD) through emulsion polymerization with acrylamide and 2-acrylamido-2-methylpropane sulfonic acid, and dimethyl diallyl ammonium chloride. The hybrid polymer exhibits improved filtration control performance in BT-WBDFs under conditions with a coexisting high Na+ concentration and high temperature. BT-WBDFs added with 2.0% PAAD exhibit satisfactory performance for reducing fluid loss under contamination of 20% NaCl, even at a high temperature of up to 220 °C. Microstructure analysis demonstrates that forming “polymer–clay” gel through intermolecular forces and promoting clay particle dispersion efficiently stabilizes BT-WBDFs. PAAD shields against the adverse effects of Na+ and promotes the hydration and dispersion of BT, finally forming a thin and compact filter cake. This study can provide a basis for applying POSS in the design of efficient additives for drilling fluids.
研究领域:
材料科学
·
石油工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Min-Hui Zhang,Shu-Yu Bao,Ke Zheng,Hai-Li Sun,Ye-Jia Li,Xi-Can Li,Quan-Zhou Wu,Jian-Feng He
The high specificity of molecularly imprinted polymers (MIPs) in recognition is pivotal for their practical application. In this study, highly specific molecularly imprinted microspheres were prepared for cepharanthine (CEP) using a shielding strategy to mitigate non-selective adsorption sites within MIPs. Carboxyl-functionalized microspheres (CPMs) were initially fabricated as the support by copolymerizing octavinyl polyhedral oligomeric silsesquioxanes (OV-POSS), methacrylic acid (MAA), and methyl methacrylate (MMA) through suspension polymerization. Cepharanthine, serving as the template molecule,was adsorbed onto the CPMs via hydrogen bonding and electrostatic interactions. Subsequently, a thin imprinted layer was deposited onto the microspheres through cross-linking polymerization of MAA and ethylene glycol dimethacrylate (EDMA). The excessive carboxyl groups within the polymer matrix were shielded by forming an alkaline coating film via the oxidative self-polymerization reaction of dopamine (DA) and polyethyleneimine (PEI). After the removal of the CEP template, the shielded molecularly imprinted microspheres (SMIMs) exhibited a significantly higher adsorption capacity for CEP (330.42μmol g −1 ) compared to the corresponding non-imprinted microspheres, which had an adsorption capacity of only 2.93μmol g −1 . Selectivity studies demonstrated that the SMIMs exhibited superior recognition specificity for CEP and its structural analogs, with an imprinting factor of up to 133.06. Furthermore, the SMIMs were employed in solid-phase extraction for the specific separation of CEP directly from Stephania epigaea Lo extracts. The elution recoveries of CEP were in range of 98.3 %−103.5 % with relative standard deviation (RSD) of below 1.9 % (n = 3).
研究领域:
材料科学
·
药物化学
·
分析化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 40
·期 5
·4761-4768
·
IF 3.277
Lei Li,Beibei Lu,Jianning Wu,Qikui Fan,Xuhong Guo,Zhiyong Liu
In this work, we report that well-defined amphiphilic star-shaped polyhedral oligomeric silsesquioxane (POSS)-based inorganic/organic hybrid block copolymers of poly(ε-caprolactone)–poly(2-(2-methoxyethoxy)ethyl methacrylate)-co-poly(ethylene glycol) methacrylate (POSS–(PCL–P(MEO2MA-co-PEGMA))16) were synthesized via click chemistry, ring opening polymerization (ROP) and atom transfer radical polymerization (ATRP), and their synthesis was confirmed by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (1H NMR), gel permeation chromatography (GPC) and X-ray photoelectron spectroscopy (XPS). The obtained polymers could self-assemble into ellipsoidal aggregates with a moderately uniform size, owing to the amphiphilic properties of the hydrophobic inorganic POSS and PCL cores and the hydrophilic P(MEO2MA-co-PEGMA) segments. These thermo-responsive organic/inorganic hybrid polymeric micelles exhibited critical phase transition temperatures in water, which could be finely tuned by changing the feed ratios of PEGMA and MEO2MA. The lower critical solution temperature (LCST) of star-shaped POSS–(PCL–P(MEO2MA-co-PEGMA))16 increased from 34 to 57 °C with the increase of PEGMA content. The results were investigated by ultraviolet-visible (UV-vis) spectroscopy, dynamic light scattering (DLS), and transmission electron microscopy (TEM). When the temperature was higher than the corresponding LCSTs, the micelles started to associate and form spherical nanoparticles. Therefore, POSS–(PCL–P(MEO2MA-co-PEGMA))16 block copolymers, a class of novel organic/inorganic hybrid materials with advantageous properties, are amphiphilic hybrid polymers with potential applications as nano-carriers, nano-reactors, and smart materials and in the biomedical field.
研究领域:
材料科学
·
高分子化学
·
生物医药
✓ 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）