Journal of Materials Chemistry A
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2018
·Vol. 6
·期 27
·13191-13202
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IF 9.931
Xinda You,Hong Wu,Yanlei Su,Jinqiu Yuan,Runnan Zhang,Qianqian Yu,Mengyuan Wu,Zhongyi Jiang,Xingzhong Cao
The demand for fractionating organic molecules and salt ions via a membrane is increasing in various industries, but the sub-nanoscale difference in solute size makes it a critical challenge. Herein, amino-functionalized polyhedral oligomeric silsesquioxane (POSS) nanoparticles were employed as a molecular-level regulator to manipulate the nanopores of a polydopamine (PDA) membrane via a facile co-deposition process. By physical intercalation and chemical bonding of multifunctional POSS, increased nanoporosity was achieved within a narrow mean nanopore size range of 1.04–1.07 nm. The optimized POSS-PDA/PAN membrane exhibited desirable dye rejection (>90%) and salt permeation (>90%) with a high permeance of 1099 L m−2 h−1 MPa−1, which was 2–4 times higher than that of previously reported membranes with a similar dye rejection. Additionally, the rigid cage-like POSS nanoparticles cross-linked with the PDA membrane contributed to the reinforced alkali and compaction resistance. The synergy of mussel-inspired chemistry and multifunctional nanomaterials provided a novel strategy to engineer nanoporous membranes with a favorable physiochemical nanostructure for efficient and selective transport of both molecules and ions.
研究领域:
材料科学
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膜技术
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纳米技术
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水处理
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分离科学
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2025
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IF 9.8
Mengyuan Hao,Jiaming Yang,Chengxi Zhu,Yonggang Zhang,Xin Qian,Jianhai Zhi,Li Liu,Yudong Huang
Simultaneously toughening and strengthening epoxy thermosets remains the critical challenge in the advancement of high-performance matrices used in advanced carbon fiber reinforced polymers (CFRPs). In this research, a series of "octopus"-like nano-POSS fillers with diverse side-chain structures were synthesized and incorporated as the toughening core in an in-situ interpenetrating network (IPN). This approach aims to achieve synergistic toughening and strengthening through multiple mechanisms, primarily including particle debonding and plastic shear deformation. Firstly, the critical impacts of side-chain structures in POSS on structure-related parameters were systematically investigated, with particular emphasis on physical entanglement and spatial hindrance. It was confirmed that extended flexible linear segments within POSS promoted robust physical entanglement, effectively increasing the cross-link density of the system and thereby enhancing its energy absorption capabilities. As a result, the maximum tensile strength and impact toughness of the matrix reached 105 MPa and 40.3 kJ/m 2 , respectively, representing a 19.3% increase in tensile strength and a remarkable 155.1% improvement in impact toughness compared to pure epoxy. Significant improvements in flexural properties, impact toughness, and interlaminar shear strength (ILSS) of CFRPs have been demonstrated, effectively validating their performance enhancements. Specifically, for the E/V/OCPC composite, the flexural strength and impact toughness were elevated to 473 MPa and 53.8 kJ/m 2 , marking respective improvements of 20.1% and 47.0% over EP composites. The considerable enhancement in the properties of the matrix and composites underscores the efficacy of constructing homogeneous synergistic toughening systems and optimizing the physical entanglement of nanofillers in developing advanced composites with superior performance.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2019
·
IF 3.621
Lijie Qu,Yanlong Sui,Chunling Zhang,Peihong Li,Xueyan Dai,Baosheng Xu,Daining Fang
Functionalized graphene oxide sheets (FGO) with improved dispersive and smoke-suppressive properties were synthesized by covalently grafting octa (propyl glycidyl ether) polyhedral oligomeric silsesquioxane on graphene oxide sheets (GO) with γ-aminopropyl triethoxysilane as a chemical bridge. The good dispersion of FGO sheets in the epoxy resin (EP) matrix endowed EP composites with stable thermal resistance, enhanced tensile and smoke-suppressive properties. Cone calorimeter tests indicated that the addition of 0.7 wt% FGO sheets to EP composites reduced the peak of heat release rate, total heat release, and total smoke release by 49.7%, 34.3%, and 41.5%, respectively. Two important effects that originated from FGO promoted this improvement; that is, well-dispersed FGO sheets exhibited a tortuous effect by lengthening the heat path and inhibiting heat diffusion in the EP matrix, and the increase in char residue and the reduction in gas volatiles confirmed the barrier effect of FGO sheets by forming protective char structures on the surface of the matrix, which restrained smoke release. This method provided a feasible concept for effectively enhancing the flame retardancy of EP composites by combining the characteristics of graphene and polyhedral oligosilsesquioxane through the construction of effective interfacial interactions.
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
DALTON TRANSACTIONS
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2021
·Vol. 50
·期 34
·11878-11888
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IF 4.39
Yadong Zhang,Ke Liu,Lei Wu,He Huang,Zixuan Xu,Zhouyang Long,Minman Tong,Yingqiu Gu,Zhenglong Qin,Guojian Chen
In this work, we reported a facile one-pot approach to construct polyhedral oligomeric silsesquioxane (POSS) and imidazolium-based ionic porous hypercrosslinked polymers (denoted as iPHCPs) with multiple active sites towards efficient catalytic conversion of carbon dioxide (CO2) to high value-added cyclic carbonates. The targeted iPHCPs were synthesized from a rigid molecular building block octavinylsilsesquioxane (VPOSS) and a newly-designed phenyl-based imidazolium ionic crosslinker through the AlCl3-catalyzed Friedel–Crafts reaction. The desired multiple active sites come from the mixed anions including free Cl− and Br− anions, and in situ formed Lewis acidic metal–halogen complex anions [AlCl3Br]− within imidazolium moieties and POSS-derived Si–OH groups during the synthetic process. The typical polymer iPHCP-12 possesses a hierarchical micro-/mesoporous structure with a high surface area up to 537 m2 g−1 and shows a fluffy nano-morphology. By virtue of the co-existence of free nucleophilic Cl− and Br− anions, the metal complex anion [AlCl3Br]− with both electrophilic and nucleophilic characters and electrophilic hydrogen bond donor (HBD) Si–OH groups, iPHCP-12 is regarded as an efficient recyclable heterogeneous catalyst for synergistic catalytic conversion of CO2 with various epoxides into cyclic carbonates under mild conditions. The present work provides a succinct one-pot strategy to construct task-specific ionic porous hypercrosslinked polymers from easily available modules for the targeted catalytic applications.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Tao Huang,Pengju Xu,Dinghan Wang,Wanxin Li,Ruohan Wei,Qian Ji,Hong Lin,Jiefeng Shen
An organic–inorganic hybrid microsphere with excellent thermal expansion properties was successfully synthesized and investigated. This study systematically examined the effects of various types and concentrations of silica-modified acrylic monomers on the thermal expansion characteristics of the microspheres. Furthermore, to enhance the high-temperature durability of thermal expansion microspheres (TEMs), an acrylate-modified polyhedral oligomeric silsesquioxane (MP-POSS) with high compatibility was synthesized as a cross-linker, and its synergistic effect on the thermal properties of TEMs was thoroughly analyzed. The core/shell polymers were characterized in terms of their chemical structures, thermal expansion behaviors, and morphology. Experimental results indicated that when triisopropylsilyl methacrylate (TISMA) was incorporated at 20 wt % and the bifunctional acrylate ester of MP-POSS was utilized as the cross-linker, the optimized TEMs exhibited a maximum expansion temperature of 230 °C, which was 23 °C higher than that of the conventional acrylate-based TEMs. Additionally, the foamed microspheres maintained their structure at 190 °C for 39 min without significant collapse. It was believed that the hybrid microspheres would provide a potential application value to fabricate lightweight materials that require high-temperature treatment, such as ceramics, plastics, rubber, and other industrial products.
研究领域:
材料科学
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高分子化学
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纳米技术
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热分析
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhongshuai Gao,Shuya Zhang,Yanyi Duan,Heng Chang,Mei Cui,Renliang Huang,Rongxin Su
Marine biofouling and corrosion have become the main problems affecting the development of the marine industry. Silicone-based coatings have been widely used for antifouling and anticorrosion due to their low surface energy. However, the poor adhesion and low mechanical stability of these materials limit their application in complex marine environments. In this work, we presented a marine antifouling and anticorrosion coating named POSS-DMA@PDMS-TCM through photoinitiated thiol–ene click reaction combined with (mercaptopropyl) methylsiloxane dimethylsiloxane (PDMS-SH), dopamine methacrylamide (DMA), sulfhydryl-functionalized organosiloxanes (POSS-(SH)8), and N-(2,4,6-trichlorophenyl) maleimide (TCM). The POSS-DMA@PDMS-TCM coating exhibited strong stability and bonding ability both in air (2.17 MPa) and underwater (2.11 MPa) when the DMA content was 3 wt %. The high antibacterial (98.1% for Staphylococcus aureus and 99.5% for Escherichia coli) and antidiatom (94.5%) properties of the POSS-DMA@PDMS-TCM coatings have also been confirmed. Moreover, the POSS-DMA@PDMS-TCM coatings show excellent antifouling abilities in 120-day marine field tests, reducing fouling by 65.5% in comparison to the blank group. The coating also displayed superior anticorrosion performance with Ecorr values of −0.055 V, Icorr values of 7.67 × 10–6 , and Rp values of 3.10 × 105 Ω for Cu, which benefited from excellent chelating effect and liquid repellency. This study provides a novel strategy for the development of high-quality marine antifouling and anticorrosion coatings.
研究领域:
材料科学
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海洋工程
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生物医学
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DOI
PubMed
高影响因子
ELECTROPHORESIS
·
2018
·Vol. 40
·期 4
·530-538
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IF 2.569
Jun Wang,Haoran Sun,Haixia Lyu,Zenghong Xie
An organic-silica hybrid monolith was prepared by a single-step ring-opening polymerization of octaglycidyldimethylsilyl polyhedral oligomeric silsesquioxane (POSS-epoxy), polyethylenimine (PEI), and β-cyclodextrin (β-CD) in a ternary porogenic solvent consisting of polyethylene glycol, 1,4-butanediol, and 1-propanol. The framework of POSS-PEI hybrid monolith could offer well-defined 3D skeleton, while β-CD with the ability of forming a host-guest inclusion complexes with a variety of compounds could show an ability of specific selection. The obtained hybrid monoliths were successfully applied for separation of phenols, benzoic acids, and nucleobases. Especially due to the introduction of β-CD, positional isomers including hydroquinone and resorcinol, o-nitrophenol and p-nitrophenol, as well as p-chlorophenol and o-chlorophenol were baseline separated and the column efficiency reached 82 300 plates/m for hydroquinone.
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Qingting Liu,Quan Sun,Na Ni,Fang Luo,Rong Zhang,Shengfei Hu,Xujin Bao,Fan Zhang,Feng Zhao,Xiao Li
Phosphoric acid doped polybenzimidazoles are among the most interesting proton exchange membrane materials for high temperature proton exchange membrane fuel cell applications . As a major challenge the proton conducting decline due to free phosphoric acid leaching during the long term fuel cell operation is addressed by fixing overmuch phosphoric acid in the polymer matrix . Novel organic-inorganic composite membranes are prepared via in situ synthesis of poly(2,5-benzimidazole) (ABPBI) and OctaAmmonium POSS (AM-POSS) hybrid composites (ABPBI/AM-POSS) following phosphoric acid doping and membrane casting procedures. Compared with the pristine ABPBI membrane, the introduction of AM-POSS into ABPBI polymer membrane caused water and phosphoric acid absorbilities increasing dramatically, resulting in the significant increase of proton conductivities at whether hydrous or anhydrous condition. ABPBI/3AM composite membranes with phosphoric acid uptake above 250% showed best proton conductivities from room temperature to 160 °C, indicating these composite membranes could be excellent candidates as a polymer electrolyte membrane for low and intermediate temperature applications.
研究领域:
材料科学
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化学工程
·
能源技术
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Qianbin Ni,Mei Chen,Yuming Chen,Wei Li,Qi Zhou,Jincheng Dai,Shuyao Ye,Binbo Jiang,Jingdai Wang,Yongrong Yang
Polyhedral oligomeric silsesquioxane (POSS) nanoaggregates can serve as a modifier of the MgCl2-supported Z-N catalyst, thus controlling the polymerization behavior and modifying the microstructure of the synthesized polymer. In this study, a series of POSS-modified MgCl2-supported Z-N catalysts were explored to reveal the relationship between the entanglement formation of ultrahigh-molecular-weight polyethylene (UHMWPE) and the adhesive effect control of hydroxy groups in POSSs. X-ray photoelectron spectroscopy (XPS) and CO in situ FTIR low-temperature adsorption technology were employed to investigate the catalytic surface structure. It was evidenced that POSSs can coordinate with the MgCl2 (110) plane, acting as adhesive of a cage structure to be in situ embedded into the MgCl2-based support. Therefore, the loaded TiCl4 active sites were isolated in the molecular scale on the MgCl2-based support and the entanglements were greatly suppressed thereof. The ″adhesion effect″ of the MgCl2 support can be controlled by adjusting the type (i.e., hydroxyl content) of POSS introduced, thereby suppressing entanglements to a greater extent. The MgCl2 support modified with POSS with no hydroxy groups endowed it with the optimum entanglement reduction effect. As a consequence, the as-synthesized polyethylene exhibits an overall promotion of the impact resistance (+14.1%), tensile strength (+13.9%), Young’s modulus (+16.8%), and break elongation (+10.5%), compared to those of UHMWPE synthesized from the POSS-free catalyst. In addition, the POSS-modified MgCl2-based catalyst shows more stable catalytic activity and responsiveness of molecular weight with hydrogen modulation, which exhibits great prospects of industrial application in polyethylene production.
研究领域:
材料科学
·
高分子化学
·
催化化学
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DOI
高影响因子
Polymer Chemistry
·
2018
·Vol. 9
·期 16
·2101-2108
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IF 4.927
Jianqiu Jin,Mingjie Tang,Zhenghe Zhang,Kang Zhou,Yun Gao,Zhi-Gang Zheng,Weian Zhang
A series of POSS-functionalized liquid crystalline block copolymers (LC BCPs), PHEMAPOSS-b-P6CBMA, containing a crystalline polyhedral oligomeric silsesquioxane (POSS) block and a mesogenic cyanobiphenyl block, were prepared via reversible addition–fragmentation transfer (RAFT) polymerization for the first time and utilized to stabilize blue phase (BP) liquid crystals through facile doping. Using the advantages of both the POSS and polymer, a new strategy, which is distinct from the commonly adopted strategy for polymer stabilization of the BP, has been established. This new BP system with a wide BP range covering the typical room temperature range (i.e. 25–30 °C) leaps over intricate processing barriers, which are inevitable in conventional photo-induced polymer stabilization. In particular, improved electro-optical (E-O) properties of the BP, including lower driving voltage, lower hysteresis and a higher Kerr constant (K) compared with the common BP stabilized via photopolymerization, were obtained by optimizing the concentration of the doped LC BCP. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were employed to evaluate the thermal properties of the LC BCPs, and the results indicated that the introduction of POSS enhanced the thermostabilities of the copolymers effectively. Such an ingenious strategy provides a brilliant and easy way to form large size BP displays and other devices that are incompatible with UV light exposure during the working process.
研究领域:
高分子化学
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材料科学
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软凝聚态物理
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功能材料
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显示技术
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DOI
高影响因子
IONICS
·
2018
·Vol. 25
·期 6
·2595-2605
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IF 2.347
Zhang Min,Ma Xiaoyan,Liu Yi,Ma Jingyu,Chen Fang,Zhang Qi
Polyhedral oligomeric silsesquioxane-poly(methyl methacrylate) 8 (POSS-PMMA 8 )/polyvinylidene fluoride (PVDF) hybrid gel polymer electrolyte (HGPE) membranes have been fabricated by using electrospinning along with the use of commercial polypropylene (PP) microporous membranes as its support; the corresponding HGPEs were obtained after being activated into liquid electrolytes. The goal of the study is to incorporate the high mechanical property of microporous PP membrane and superior electrochemical performance of electrospun gel polymer electrolyte to get the high-performance electrolyte for Li-ion battery. As an effective modifier, it is found that the introduction of POSS-polymer plays a vital role in enhancing many properties of HGPEs, and the influence of POSS-(PMMA 46 ) 8 content on overall properties of HGPEs is investigated. In specific, the HGPEs membrane with 12 wt% POSS-(PMMA 46 ) 8 displays a significant uniform fiber diameter with 720 nm and high electrolyte uptake of 322% due to the high porosity of 58%. Meanwhile, a great improvement in mechanical property is obtained with a tensile strength of 34.5 MPa, which is about 7 times of POSS-(PMMA 46 ) 8 /PVDF membrane without support. The interfacial resistance between the corresponding HGPEs and Li electrodes is significantly reduced and as low as 138 Ω. Furthermore, the LiFePO 4 /HGPEs/Li button cell is assembled and excellent cyclability is shown at 0.1 C and 0.5 C, respectively. The results demonstrate that POSS-(PMMA 46 ) 8 /PVDF HGPEs could be applied as a promising HGPE candidate for high-performance Li-ion batteries.
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 68
·55048-55058
·
IF 3.84
Aizhao Pan,Shao Yang,Ling He
Polyhedral oligomeric silsesquioxane (POSS) tethered fluorinated diblock copolymers including linear-shaped ap-POSS–PMMA-b-PDFHM and star-shaped s-POSS–(PMMA-b-PDFHM)16 are synthesized by octakis(dibromoethyl)POSS (POSS-(Br)16) and aminopropylisobutyl POSS (ap-POSS) initiating methylmethacrylate (MMA) and dodecafluoroheptylmethacrylate (DFHM). In THF solution, both diblock copolymers could self-assemble into 200 nm core/shell micelles with a POSS/PDFHM core and 70–80 nm PMMA shell. These micelles are able to produce typical films with a fluorine-rich top-surface and POSS-gathered sub-surface. Although PDFHM segments and POSS cages are competitively migrating onto the film surface, the migration of the PDFHM segments is actually improved by the POSS cages. Comparatively, the surface of the ap-POSS–PMMA-b-PDFHM film is much more rough and fluorine-rich than the s-POSS–(PMMA-b-PDFHM)16 film, therefore, the ap-POSS–PMMA-b-PDFHM film has higher viscoelasticity and higher oleophobicity, but a little lower hydrophobicity than the s-POSS–(PMMA-b-PDFHM)16 film. The hydrophobic application of both linear- and star-shaped topologies to glass, cotton fabric and stone substrates reveals that the treated samples exhibit superhydrophobicity for the cotton fabric (>150°) and obvious hydrophobicity for the stone and glass (>135°) in terms of resistance to water and other liquids like coffee, milk, coke and green tea. It is believed that the properties of self-assembled films and the hydrophobic applications are related closely to the topologies of block copolymers.
研究领域:
高分子化学
·
材料科学
·
表面科学
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纳米技术
·
功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）