ACS Applied Engineering Materials
·
2023
·
IF 0
Xue Han,Ruisheng Xue
Hypercross-linked porous polymer materials have good stability and can be used as needed by adjusting the hydrophobic/hydrophilic degree of its functional groups/ions and surface, and they can achieve high gas adsorption. In this study, a series of hypercross-linked porous polymer materials with a rich pore structure and excellent gas adsorption ability were synthesized from polynaphthalene and dimethoxymethane by adjusting the added amount of the catalyst and cross-linker. The sample prepared under the optimized conditions of adding 18 mmol catalyst and 9 mmol cross-linker gained the specific surface area of 786 m2 g–1 and 0.58 nm ultramicropores taking up 80% of total pores. In addition, its CO2 uptake was up to 2.75 mmol g–1 at 273.15 K/1.0 bar. After carbonization at 800 °C, this sample had a 710 m2 g–1 specific surface area and a monodisperse pore structure with a pore diameter of about 0.4 nm, and its CO2 uptake increased to 3.81 mmol g–1 at 273.15 K/1.0 bar. The adsorption selectivity coefficients of CO2/N2 and CO2/CH4 for the carbonized sample were 8.5 and 2.3, respectively, by using Henry’s law initial slope method.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
DOI
Polymer Chemistry
·
2016
·Vol. 7
·期 38
·6003-6014
·
IF 5.687
Weihong Lin,Kai Xu,Jun Peng,Yuxiu Xing,Shuxi Gao,Yuanyuan Ren,Mingcai Chen
We described a route to a core–shell polynaphthoxazine nanofiber that can be fabricated by a single-nozzle electrospinning process using a phase-separated mixed polymer composite solution. The naphthoxazine-based polymer, as the core material, was synthesized by using a hydroxyl-containing naphthoxazine through esterification with methacryloyl chloride and subsequent free radical polymerization. Our results demonstrated that these core–shell structure nanofibres are composed of bundles of regularly structured ultrafine polynaphthoxazine nanofibers as the core and polymethylmethacrylate (PMMA) as the shell, because of the incompatibility of the naphthoxazine-based polymer and PMMA in mixed solvents. To maintain the structural integrity of the fibrous network during the curing process, we carried out the curing reaction in a chemically inert fluid with p-toluenesulfonic acid as the catalyst. After carbonization, the obtained carbon fiber with high nitrogen content (2.2 wt%), resulting from the oxazine ring as the carbon source, showed individual nanofibres without aggregation, and with a mean diameter of less than 30 nm. As an energy storage electrode, these naphthoxazine-based carbon nano-materials have excellent high-rate discharge capacity and low equivalent series resistance.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2021
·Vol. 39
·期 12
·1634-1644
·
IF 3.603
Yuan Meng-Jie,Hu Zhao-Yu,Fang Hong,Li Shu-Jing,Guo Hong-Tao,Hu Ru-Bei,Jiang Shao-Hua,Liu Kun-Ming,Hou Hao-Qing
Polynaphthalimide (PNI) with six-membered imide ring ( 6 -PI) has better chemical resistance than five-membered imide ring ( 5 -PI), but is difficult to be processed into nanofibers due to the poor processability. In this work, we proposed a template strategy to fabricate nanofiber 6 -PI membranes and their composite membranes. Neat 6 -PI and 6 -PI composite fibrous membranes were prepared using high-molecular-weight polymers 5 -PAA and PVP as templates by electrospinning. FTIR, DMA, TGA and tensile tests were used to characterize their chemical structures, thermal stability and mechanical properties. Further eye-observation, micro-morphology investigation and tensile tests were applied to evaluate the chemical resistance of nanofibrous membranes in strong acid, strong alkaline, and concentrated salt. The results demonstrated that 6 -PI nanofibrous membranes possessed the best thermal stability, best acid, alkaline, and salt resistance with the highest mechanical retention. This study will provide basic information for high-performance electrospun 6 -PI nanofiber membranes and provide opportunities for applications of PIs in different chemically harsh environments.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 123
·期 5
·2706-2714
·
IF 1.24
Guang Zhu,Jingkun Xu,Ruirui Yue,Baoyang Lu,Jian Hou
Relatively scant work was related to polynaphthalene (PN) and its derivatives because of the unique nonlinear optical properties which make PN and its derivatives owning potential applications in various domains. According to relevant studies, the pursuit for the synthesis of high quality PN films is a great challenge for the applications of PN. To achieve high quality polymer films, three bridged naphthalene derivatives were designed, and finally two crosslinked PN exhibiting space network were electrosynthesized, respectively, by direct anodic oxidation from 1,6-bis(naphthalen-2-yloxy)hexane and 1,4-bis((naphthalen-2-yloxy)methyl)benzene in mixed electrolyte of dichloromethane containing boron trifluoride diethyl etherate. Furthermore, as-formed conducting films were characterized by cyclic voltammetry, spectroscopic analysis, thermal analysis, and scanning electron microscopy. And the series of characterizations indicated that films hold high stability and good blue-light-emitting property. Meanwhile, these polymer films were smooth, shiny, and flexible easily being processed into various shapes by conventional mechanical methods. Consequently, these high quality PN films will facilitate their potential applications as blue-light-emitting materials in organic light-emitting diode. Because di(naphthalen-2-yl) terephthalate was difficult to electropolymerize, the effects of bridged spacers to polymerization were also discussed. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Nan Liu,Fahu Yang,Dong Liu,Fei Chen
Polyesters are extensively utilized across various fields due to their superior physical and chemical properties; enhancing the toughness of polyesters is currently imperative for extending their applications. In this study, a novel acrylate elastomer (BMHx) with controllable hydroxyl groups was designed to melt-blend with polyethylene naphthalene (PEN), to enhance the fracture toughness of PEN. The hydroxyl group in BMHx can effectively enhance the compatibility of PEN and BMHx, thus reducing the average particle size of BMHx to endow it to disperse in PEN more uniformly, leading to a high toughness PEN material. The tensile toughness of PEN/BMH10 can reach 4.01 MJ/m3, and the notched impact strength is 8.02 kJ/m2, which are 18 times and 3.8 times higher than that of PEN, respectively. These findings provide a new strategy to toughen the polyester and thus a general usefulness.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 6
·期 1
·015053
·
IF 1.151
L Z Pei,Y Ma,F L Qiu,F F Lin,C G Fan,X Z Ling
Polynaphthylamine/graphene composites have been synthesized by an in situ polymerization of the naphthylamine monomers and graphene. The polynaphthylamine/graphene composites were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), Raman spectrum and Fourier transform infrared spectrum (FTIR). The analytical results show that the polynaphthylamine/graphene composites possess hexagonal graphite-2H phase and are composed of irregular polynaphthylamine particles and graphene nanosheets with the wrinkles and folds. The bare glassy carbon electrode was modified with the polynaphthylamine/graphene composites for the detection of benzoic acid. The polynaphthylamine/graphene composites modified glassy carbon electrode exhibits an irreversible oxidation cyclic voltammogram (CV) peak located at +0.29 V. The significant enhancement in the current response is observed as the increase of the scan rate, benzoic acid concentration and decrease of the pH value of the electrolyte. The current response of the CV peak of the benzoic acid exhibits a linear relationship with the benzoic acid concentration ranging from 0.001–2 mM. The detection limit is 0.34 μM. The polynaphthylamine/graphene composites modified glassy carbon electrode reveals great promising for the determination of benzoic acid.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yihuan Wang,Siqing Yuan,Guangji Wang,Zebin Fan,Jingwei Zhang,Zetong Li,Chenhua Liu,Dewen Zhao,Zhimin Chai,Xinchun Lu
Flexible transparent conductive electrodes (FTCEs) are essential components in emerging optoelectronics, including flexible displays, smart glasses/windows, organic solar cells, and electronic skins. The surface energy-directed assembly (SEDA) process, known for its capability to create high-resolution and high-fidelity patterns, has been utilized to fabricate TCEs on rigid glass substrates. However, the fabrication of FTCEs on flexible substrates remains comparatively underexplored. Here, we present the fabrication of silver patterns on polyethylene naphthalate (PEN) substrates using the SEDA process. A surface treatment process has been devised to render the PEN substrates hydrophobic, achieved through coating the substrates with fluorine-containing PyFlon films. This approach yields a significant improvement over silane-based self-assembled monolayer film-coated substrates, as it drastically diminishes surface roughness. Consequently, the contact angle hysteresis of the substrate surface is minimized, enabling the effective dewetting of the nanoparticle suspension. The incorporation of PyFlon films into the SEDA process has proven to be highly successful. Using this approach, we have successfully assembled functional patterns of various geometries and dimensions on PEN substrates, composed of silver nanoparticles, quantum dots, carbon nanotubes, silver nanowires, and gallium indium eutectic, with a high resolution down to 500 nm. The assembled silver line electrodes exhibit excellent transmittance (∼88%), low sheet resistance (7.12 Ω/□), and high mechanical stability, and their application in electroluminescent devices is showcased.
研究领域:
材料科学
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纳米技术
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
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