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《Compositional Effects of Large Graphene Oxide Sheets on the Spinnability and Properties of Polyurethane Composite Fibers》

  • 来源专题：绿色印刷—可穿戴电子
  • 编译者： 张宗鹏
  • 发布时间：2016-04-13

  • Keywords:

        elastomeric nanocomposites;graphene oxide;polyurethane;strain sensing;wet-spinning

    Recent advances in wearable electronics, technical textiles, and wearable strain sensing devices have resulted in extensive research on stretchable electrically conductive fibers. Addressing these areas require the development of efficient fiber processing methodologies that do not compromise the mechanical properties of the polymer (typically an elastomer) when nanomaterials are added as conductive fillers. It is highly desirable that the addition of conductive fillers provides not only electrical conductivity, but that these fillers also enhance the stiffness, strength, stretchability, and toughness of the polymer. Here, the compatibility of polyurethane (PU) and graphene oxide (GO) is utilized for the study of the properties of elastomeric conductive fibers prepared by wet-spinning. The GO-reinforced PU fibers demonstrate outstanding mechanical properties with a 200-fold and a threefold enhancement in Young's modulus and toughness, respectively. Postspinning thermal annealing of the fibers results in electrically conductive fibers with a low percolation threshold (≈0.37 wt% GO). An investigation into optimized fiber's electromechanical behavior reveals linear strain sensing abilities up to 70%. Results presented here provide practical insights on how to simultaneously maintain or improve electrical, mechanical, and electromechanical properties in conductive elastomer fibers.

  • 原文来源：;http://onlinelibrary.wiley.com/doi/10.1002/admi.201500672/abstract
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  • 《Continuous Remediation of Congo Red Dye Using Polyurethane-Polyaniline Nano-Composite Foam: Experiment and Optimization Study》
    • 来源专题：现代化工
    • 编译者：武春亮
    • 发布时间：2024-07-25
    • Registration Log In For Libraries For Publication Downloads News About Us Contact Us For Libraries For Publication Downloads News About Us Contact Us Search Paper Titles Construction of Ternary Heterostructured NaNbO3/Bi2S3/ Ag Nanorods with Synergistic Pyroelectric and Photocatalytic Effects for Enhanced Catalytic Performance p.1 Magnetic Nitrogen-Doped Fe3C@ c Catalysts for Efficient Activation of Peroxymonosulfate for Degradation of Organic Pollutants p.17 Continuous Remediation of Congo Red Dye Using Polyurethane-Polyaniline Nano-Composite Foam: Experiment and Optimization Study p.33 Quantization Conductance of InSb Quantum-Well Two-Dimensional Electron Gas Using Novel Spilt Gate Structures p.49 Correlation between Crystallite Characteristics and the Properties of Copper Thin Film Deposited by Magnetron Sputtering: Bias Voltage Effect p.65 Development of Hydrophilic Self-Cleaning and Ultraviolet-Shielding Coatings Incorporating Micro-Titanium Dioxide/Nano-Calcium Carbonate (μ-TiO2)/(Nano-CaCO3) p.79 Production of Cu/Zn Nanoparticles by Pulsed Laser Ablation in Liquids and Sintered Cu/Zn Alloy p.91 HomeJournal of Nano ResearchJournal of Nano Research Vol. 83Continuous Remediation of Congo Red Dye Using... Continuous Remediation of Congo Red Dye Using Polyurethane-Polyaniline Nano-Composite Foam: Experiment and Optimization Study Article Preview Abstract: This study employed an innovative approach, utilizing prepared dried polyurethane-polyaniline nano-composite, through in-situ polymerization, for continuous remediation of Congo red dye. Response Surface Methodology (RSM) based on the Box-Behnken design (BBD) model was utilized to optimize the processing parameters, including initial dye concentration, flow rate, and pH. The two-factor interaction (2FI) model emerged as the most significant, highlighting the influence of individual and interaction effects of the factors. Optimization of the dye remediation process yielded the optimal conditions of a flow rate of 10 mL/min, acidic pH of 5.00, and dye concentration of 20 mg/L, resulting in an impressive, predicted removal efficiency of 99.09% agreeing with the experimental value. Moreover, the maximum adsorption capacity was determined to be 329.68 mg/g. Characterization of the adsorbent material involved techniques such as Scanning electron microscopy (SEM), Fourier transforms infrared spectra (FTIR), X-ray spectroscopy (XRD), and Zeta potential analysis. This material offers a sustainable alternative in industries to treat Congo red dye before being disposed of into the environment. Access through your institution Add to Cart You might also be interested in these eBooks View Preview Info: Periodical: Journal of Nano Research (Volume 83) Pages: 33-48 DOI: https://doi.org/10.4028/p-uyW1nl Citation: Cite this paper Online since: July 2024 Authors: Abubakar Ibrahim, Usama Nour Eldemerdash, Tsuyoshi Yoshitake, Wael M. Khair-Eldeen, Marwa Elkady Keywords: Congo Red Dye, Continuous Water Treatment, Foam, Polyurethane-Polyaniline Nanocomposite, Response Surface Methodology (RSM) Export: RIS, BibTeX Price: Permissions: Request Permissions Share: - Corresponding Author References [1] J. Rao, G. Ravindiran, R. Subramanian, P. Saravanan, Journal of the Indian Chemical Society Optimization of process conditions using RSM and ANFIS for the removal of Remazol Brilliant Orange 3R in a packed bed column, J. Indian Chem. Soc. 98 (2021) 100086. DOI: 10.1016/j.jics.2021.100086 Google Scholar [2] H. Zheng, J. Qi, R. Jiang, Y. Gao, X. Li, Adsorption of malachite green by magnetic litchi pericarps?: A response surface methodology investigation, J. Environ. Manage. 162 (2015) 232–239. DOI: 10.1016/j.jenvman.2015.07.057 Google Scholar [3] S.I. Siddiqui, E.S. Allehyani, S.A. Al-Harbi, Z. Hasan, M.A. Abomuti, H.K. Rajor, S. 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  • 《Improved-quality graphene films via the synergism of large nanosheet aligning and nanotube bridging for flexible supercapacitors》
    • 来源专题：现代化工
    • 编译者：武春亮
    • 发布时间：2024-07-28
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(2014 - 2018)Waves Random Media (1991 - 2004) Volume number: Issue number (if known): Article or page number: Nanotechnology Purpose-led Publishing is a coalition of three not-for-profit publishers in the field of physical sciences: AIP Publishing, the American Physical Society and IOP Publishing. Together, as publishers that will always put purpose above profit, we have defined a set of industry standards that underpin high-quality, ethical scholarly communications. We are proudly declaring that science is our only shareholder. ACCEPTED MANUSCRIPT Improved-quality graphene films via the synergism of large nanosheet aligning and nanotube bridging for flexible supercapacitors Xuan Xu1, Zhenhu Li1, Haoxiang Li2, Yongsu Li1, Yu Zeng1 and Shuangyi Liu1 Accepted Manuscript online 25 July 2024 ? © 2024 IOP Publishing Ltd What is an Accepted Manuscript? DOI 10.1088/1361-6528/ad6774 Download Accepted Manuscript PDF Figures Skip to each figure in the article Tables Skip to each table in the article References Citations Article data Skip to each data item in the article What is article data? Open science Article metrics Submit Submit to this Journal Permissions Get permission to re-use this article Share this article Article and author information Author e-mailslizhenhu@cigit.ac.cn Author affiliations1 Chinese Academy of Sciences Chongqing Institute of Green and Intelligent Technology, Chongqing 400714, P.R. China, Chongqing, Sichuan, 400714, CHINA 2 Chinese Academy of Sciences Chongqing Institute of Green and Intelligent Technology, Chongqing 400714, P.R. China, Chongqing, Sichuan, 401122, CHINA ORCID iDsZhenhu Li https://orcid.org/0000-0001-8574-783X Dates Received 17 January 2024 Revised 22 April 2024 Accepted 25 July 2024 Accepted Manuscript online 25 July 2024 Peer review information Method: Single-anonymous Revisions: 1 Screened for originality? Yes Journal RSS Sign up for new issue notifications 10.1088/1361-6528/ad6774 Abstract Scalable production of reduced graphene oxide (rGO) films with high mechanical-electrical properties are desirable candidates for wearable electronics devices and energy storage applications. Removing structural incompleteness such as wrinkles or voids in the graphene films generated from the assemble process would greatly optimize their mechanical properties. However, the densely stacked graphene sheets in the films degrades their ionic kinetics and thus limits their development. Here, a horizontal-longitudinal-structure modulating strategy is demonstrated to produce enhanced mechanical, conductive and capacitive graphene films. Typically, two-dimensional (2D) large graphene sheets (LGS) induce regular stacking of GO during assembling process to reduce wrinkles, while one-dimensional (1D) single-walled carbon nanotubes (SWCNT) bridge with graphene sheets to strengthen the multidirectional intercalation and reduce GO layer restacking. The simultaneous incorporation of LGS and SWCNT synergistically makes fine microstructure with improving the alignment of graphene sheets, increasing continuous conductive pathways to facilitate electron transport, and enlarging interlayer spacing to promote the electrolyte ion diffusion. As a result, the obtained graphene films are flat and exhibit signally reinforced mechanical properties, electrical conductivity (38727 S m-1), as well as specific capacitance (232 F g-1) as supercapacitor electrodes than those of original rGO films. Moreover, owing to the comprehensive improved properties, the flexible gel supercapacitor assembled by the graphene film-based electrodes shows high energy density, good flexibility and excellent cycling stability (93.8% capacitance retention after 10000 cycles). This work provides a general strategy to manufacture robust graphene structural materials for energy storage applications in flexible and wearable electronics. Export citation and abstract BibTeX RIS During the embargo period (the 12 month period from the publication of the Version of Record of this article), the Accepted Manuscript is fully protected by copyright and cannot be reused or reposted elsewhere. As the Version of Record of this article is going to be / has been published on a subscription basis, this Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence after the 12 month embargo period. After the embargo period, everyone is permitted to use copy and redistribute this article for non-commercial purposes only, provided that they adhere to all the terms of the licence https://creativecommons.org/licences/by-nc-nd/3.0 Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permissions may be required. 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