1,149 research outputs found
sj-docx-1-tan-10.1177_17562864211056710 – Supplemental material for Adverse events of rituximab in neuromyelitis optica spectrum disorder: a systematic review and meta-analysis
No full textSupplemental material, sj-docx-1-tan-10.1177_17562864211056710 for Adverse events of rituximab in neuromyelitis optica spectrum disorder: a systematic review and meta-analysis by Hao Wang, Juanping Zhou, Yi Li, Lili Wei, Xintong Xu, Jianping Zhang, Kehu Yang, Shihui Wei and Wenfang Zhang in Therapeutic Advances in Neurological Disorders</p
sj-doc-2-tan-10.1177_17562864211056710 – Supplemental material for Adverse events of rituximab in neuromyelitis optica spectrum disorder: a systematic review and meta-analysis
No full textSupplemental material, sj-doc-2-tan-10.1177_17562864211056710 for Adverse events of rituximab in neuromyelitis optica spectrum disorder: a systematic review and meta-analysis by Hao Wang, Juanping Zhou, Yi Li, Lili Wei, Xintong Xu, Jianping Zhang, Kehu Yang, Shihui Wei and Wenfang Zhang in Therapeutic Advances in Neurological Disorders</p
A study on the hydration of calcium aluminate cement pastes containing silica fume using non-contact electrical resistivity measurement
No full textIn this study, a non-contact electrical resistivity method is employed to investigate the hydration process of calcium aluminate cement (CAC) pastes incorporating silica fume (SF) at an early age. The CAC-SF pastes have a water-to-binder ratio (w/b) of 0.6 and a replacement of SF for CAC at 0, 5, 10, and 20% (by weight of the binder). The pastes are tested for electrical resistivity, thermal analysis (internal temperature), setting time, and compressive strength, and the hydration products of the pastes are also examined. The results indicate that the evolution of electrical resistivity is closely related to the hydration process of the CAC pastes, and the conversion stage is closely associated with the setting time of pastes. As the increase of SF replacement, the hydration process of CAC pastes was accelerated within 24 h, and the development of compressive strength was hampered at an early age but increased later. SF replacement inhibits the conversion of metastable CAC hydrates (CAH10 and C2AH8) to C3AH6 through filling, seeding, and reacting with CAC, thus reducing the heat of hydration.This article is published as Liao, Yishun, Sichun Wang, Kejin Wang, Siraj Al Qunaynah, Shihui Wan, Zhengxia Yuan, Pengfei Xu, and Shengwen Tang. "A study on the hydration of calcium aluminate cement pastes containing silica fume using non-contact electrical resistivity measurement." Journal of Materials Research and Technology 24 (2023): 8135-8149.
DOI: 10.1016/j.jmrt.2023.05.080.
Copyright 2023 The Authors.
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0).
Posted with permission
Facile preparation of soluble poly(2-aminothiazole)-based composite coating for enhanced corrosion protection in 3.5% NaCl solution
No full textConducting polymer-based coating is the prospective alternative in consideration of environmentfriendly coatings for corrosion protection of metallic substrate. Minimally-researched poly(2-aminothiazole) (PAT) with well-dispersion and good processability was synthesized successfully via radical polymerization and explored to prepare novel PAT/epoxy composite coatings on Q235 steel. The anticorrosive performance of PAT-based composite coatings was evaluated by electrochemical impedance spectroscopy, potentiodynamic polarization technique and scanning vibrating electrode technique in 3.5 wt % NaCl solution. The corrosion protective mechanism of poly(2-aminothiazole) was proved by the identification of rust layer beneath the composite coating
Yi wang zhi mei: ji yi yu xiang xiang de yi jing
No full textM.F.A.Since the history of the human race, human brain has long been examined and studied in order to answer the questions of memory. Memory becomes the major research topic in different discipline including philosophy, art and literature. What exactly memory stands for while we subconsciously recall our memories? This thesis starts with the question of what is memory and in the process of understanding memory puts forward the importance of imagination. At the same time, the thesis discusses how art presents the vision of memory and imagination in the contemporary context. I explore the relationship between memory and imagination through integrating western theory on memory space. From the process of memory, this thesis explore the external space and internal space of multiple structures of memory space, and indicate the relationship between memory and time. By studying Chinese and Western researches on ruins, explore how ruins, as a metaphor, become a carrier of memory to represent memory and history. Last but not least, I would like to draw an analogy between forgetting and incompleteness as to suggest the value of obliteration and inscription based on the research of the oriental aesthetics. Lastly, I will fully examine my own artistic practices with my reflections on ruins.First of all, the thesis is going to discuss the 3 types of memory space both internally and externally in order to emphasise the relationship between memory and space. Secondly, I put forward my concern about how ruins become a metaphorical carries of memory. Thirdly, I will talk about the aesthetic value of forgetting and incompleteness in the ground of oriental philosophical spirit. The last part of the thesis would be my personal artistic creations reflecting my interpretation on memory and imagination.長久以來，人類致力於研究大腦，渴望解答關於記憶的問題。記憶成為了多個界別的研究對象，不論哲學、藝術、文學等範疇。然而，當我們下意識地說起自身的回憶的時候，有沒有想過記憶到底是什麼？本文透過什麼是記憶的提問展開，在理解記憶的過程中，提出想像的重要性。與此同時，討論在當代的語境下，藝術如何呈現記憶與想像的意境。透過綜合西方理論對記憶空間的論述，探討記憶與想像之間的關係。從記憶的過程，探討記憶多重結構的外在空間及內在空間。整合及引用中西方對廢墟的研究，探討其作為隱喻，如何成為記憶的載體述說記憶與歷史。以東方美學精神的研究為基礎，說明殘缺與遺忘的關係，帶出塗抹與消除的價值與重要性，從而說明藝術美學的意境。最後，引用個人藝術創作思考廢墟與自身的關係。本論文分為四個部分，第一部分將探討三種記憶空間，物理學的記憶部分不在本論文的討論範圍，因此只會說明記憶與空間的關係。第二部分探討記憶與廢墟之間的關係，說明廢墟如何成為記憶的隱喻。第三部分探討遺忘與殘缺的類比關係，以東方美學精神提出塗抹與消除的美學價值。最後一部分探討個人創作的過程及作品主題，如何呈現記憶與想像的意境。黃詩慧."2020年8月".Thesis M.F.A. Chinese University of Hong Kong 2020.Includes bibliographical references (leaves 56-59).Abstract also in English.Title from PDF title page (viewed on March 14, 2022).Huang Shihui
Synergistic Effect of Polypyrrole-Intercalated Graphene for Enhanced Corrosion Protection of Aqueous Coating in 3.5% NaCI Solution
No full textDispersion of graphene in water and its incorporation into waterborne resin have been rarely researched and hardly achieved owing to its hydrophobicity. Furthermore, it has largely been reported that graphene with impermeability contributed to the improved anticorrosion property. Here, we show that highly concentrated graphene aqueous solution up to 5 mg/mL can be obtained by synthesizing hydrophilic polypyrrole (PPy) nanocolloids as inter-calators and ultrasonic vibration. On the basis of pi-pi interaction between PPy and graphene, stacked graphene sheets are exfoliated to the thickness of three to five layers without increasing defects. The corrosion performance of coatings without and with PPy and graphene is obtained by potential and impedance measurements, Tafel curves, and fitted pore resistance by immersing in a 3.5 wt % NaCl solution. It turns out that composite coating with 0.5 wt % graphene additive exhibits superior anticorrosive ability. The mechanism of intercalated graphene-based coating is interpreted as the synergistic protection of impermeable graphene sheets and self-healing PPy and proved by the identification of corrosion products and the scanning vibrating electrode technique
Corrosion protection performance of waterborne epoxy coatings containing self-doped polyaniline nanofiber
No full textSelf-doped sulfonated polyaniline (SPANi) nanofiber was synthesized by the copolymerization of 2-aminobenzenesulfonic acid (ASA) and aniline via a rapid mixing polymerization approach. The chemical structure of SPANi was investigated by the Fourier-transform infrared (FT-IR), Raman, X-ray photoelectron spectroscopy (XPS), UV-vis spectra and X-ray diffraction (XRD) pattern. The as-prepared SPANi nanofibers had 45 nm average diameter and length up to 750 nm as measured by scanning electron microscope (SEM) and transmission electron microscope (TEM). The self-doped SPANi nanofiber possessed excellent aqueous solubility, good conductivity (0.11 S/cm) and reversible redox activity, making it suitable as a corrosion inhibitor for waterborne coatings. The prepared SPANi/waterborne epoxy composite coatings exhibited remarkably improved corrosion protection compared with pure waterborne epoxy coating as proved by the polarization curves and electrochemical impedance spectroscopy (EIS). The passivation effect of SPANi nanofiber and the corrosion products beneath the epoxy coatings immersed in 3.5% NaCl solution as a function of time were also investigated in this study. (C) 2017 Elsevier B.V. All rights reserved
Early hydration and mechanical properties of high-belite sulfoaluminate cement blended with ferrite
No full textIn this study, the effect of ferrite incorporation on the hydration of high-belite sulfoaluminate cement was investigated. The fluidity, compressive strength, heat of hydration, electrical resistivity, and scanning electron microscopy-energy dispersive X-ray spectroscopy results of the cement paste were evaluated. The results indicate that the incorporation of ferrite promoted the early hydration rate of the cement and accelerated the formation of calcite. It also promoted the generation of strätlingite and accelerated the reaction of belite during the late hydration stage. With an increase in the ferrite content, the exothermic capacity of the cement gradually decreased. The early hydration products of ferrite in cement pastes have multidirectional crystals (ettringite) and gels (calcium silicate hydrate). The Fe element was found to alter the structure of ettringite, resulting in an antler-like shape. Furthermore, according to the EDS results, ettringite contained more Fe, indicating that Fe migration was inclined toward the crystals. Thermodynamic modeling demonstrated that the growth of ettringite and strätlingite in the paste was promoted, which was consistent with the experimental results.This is a manuscript of an article published as Hu, Mengting, Yishun Liao, Zhonghui Cai, Caisheng Meng, Shihui Wan, Shengwen Tang, Siraj Al Qunaynah, and Kejin Wang. "Early hydration and mechanical properties of high-belite sulfoaluminate cement blended with ferrite." Construction and Building Materials 489 (2025): 142138. doi: https://doi.org/10.1016/j.conbuildmat.2025.142138
Long-term corrosion protection of mild steel by epoxy coating containing self-doped polyaniline nanofiber
No full textSulfonated polyaniline (SPANI) with good processability and well-dispersion in common organic solvent was synthesized via the copolymerization of 2-aminobenzenesulfonic acid and aniline and was identified by UV-vis, Raman, X-ray photoelectron spectroscopy, X-ray diffraction and scanning electron microscopy. SPANI/epoxy composite coatings on the steel substrate were prepared for the anti-corrosive investigations in 3.5 wt% NaCl solution via electrochemical impedance spectroscopy and polarization curves. It turned out that composite coatings with SPANI exhibited excellent protective performance with high impedance modulus during the 120 days immersion while blank epoxy coating has been invalid after 80 days immersion. Finally, the passivation of steel substrate by SPANI containing composite coating was proved by the composition and morphology of the rust products beneath the coatings. It's concluded that self-doped SPANI enhanced the anti-corrosive property of composite coatings via forming a metal oxide film composed of Fe2O3 and Fe3O4
Water Soluble Trianiline Containing Polyurethane (TAPU) as an Efficient Corrosion Inhibitor for Mild Steel
No full textNovel trianiline containing water soluble polyurethane (TAPU) was synthesized by polymerization of polyethylene glycol, toluene diisocyanate and amine-capped aniline trimer. The influence of TAPU on the corrosion inhibition of mild steel in 1 M HCl was investigated using weight loss measurements, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS). The performance of TAPU on the corrosion inhibition of mild steel was also evidenced by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and atomic force microscope (AFM). Results confirmed that the adsorption of TAPU on the mild steel surface and consequent inhibition of the corrosion process. The inhibition efficiency (IE%) increased with a rise in TAPU concentration, reaching a value up to 97% at a concentration of 200 mg/l. Potentiodynamic polarization curves showed that the TAPU affected both cathodic and anodic protection and was a mixed type inhibitor in HCl corrosive medium. Adsorption isotherm studies confirmed that the adsorption of TAPU on the mild steel surface in 1 M HCl solution obeyed Langmuir adsorption isotherm. EDS analysis determined the adsorption of TAPU molecules on the steel surface, and the absorbed TAPU provided an effective corrosion inhibition in 1 M HCl solution from observation of surface morphology by SEM and AFM
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