Nepenthes pitcher-inspired lubricant-infused slippery surface with superior anti-corrosion durability, hot water repellency and scratch resistance

Binbin Zhang,Weichen Xu,Qingjun Zhu,Fang Guan,Yimeng Zhang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.107 No.-

Nepenthes pitcher-inspired slippery surface provides an alternative strategy to overcome the shortcomingsof the current superhydrophobic surfaces such as thermal–mechanical stability and functional durability. Herein, we fabricate a lubricant-infused slippery surface (LISS) through micro-nano structurebuilding, low surface energy molecular grafting and perfluoropolyethers (PFPE) lubricant oil infusion. The surface morphologies, chemical compositions, wettability, dynamic liquids movement, selfcleaning,anti-corrosion behavior, and thermal–mechanical stability were investigated and analyzed. The electrochemical impedance spectroscopy (EIS) results reveal that the fabricated LISS exhibitsenhanced Rct and |Z|0.01Hz values with 2 orders of magnitude higher even after 30 days immersion,demonstrating outstanding long-lasting anti-corrosion properties. Besides, the LISS also exhibits superiorcapacities of hot water repellency (90 C water droplets) and scratching resistance. We believe theseresults have significant implications for understanding the design and multi-functional applications ofbiomimetic liquid-infused slippery materials.

Durable corrosion resistant and hot water repellent superhydrophobic bilayer coating based on fluorine-free chemicals

Binbin Zhang,Mengying Qiao,Guojun Ji,Baorong Hou 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.119 No.-

Due to their unique interface functions, superhydrophobic materials have a wide range of applications. However, the majority of current superhydrophobic surfaces are designed and manufactured using fluorinatedchemical reagents. Moreover, high temperature water droplets with lower surface tension easilypinning to the surface, resulting in interfacial property failures. To overcome these deficiencies, herein wefabricated a superhydrophobic bilayer coating on Q235 carbon steel based on fluorine-free chemicals ofpolydimethylsiloxane (PDMS) and hexadecyltrimethoxysilane modified aluminum oxide nanoparticles(Al2O3@HDTMS). Field-emission scanning electron microscopy (FE-SEM), Energy dispersive spectroscopy(EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Contactangle meter, and Electrochemical impedance spectroscopy (EIS) techniques were utilized to characterizethe constructed superhydrophobic bilayer coating. The results show that the superhydrophobic bilayercoating exhibits non-wetting, anti-fouling and self-cleaning capacities towards various solid and liquidpollutants. The superhydrophobic bilayer coating possesses superior anti-corrosion and weather resistingproperties with |Z|0.01Hz and Rct values increased by more than eight orders of magnitude, withstanding720 h accelerated salt-spray and 50 days outdoor atmospheric corrosion attack. Furthermore, the superhydrophobicbilayer coating features super-repellency towards water droplets in a wide temperaturerange (30 90 C) and accompanied with high mechanical stability against continuous sandpaper abrasionand tape-peeling cycles.

Intermediate-layer strengthened superhydrophobic coating with stable corrosion resistance, delayed icing and long-term weatherability

Binbin Zhang,Guang Yang,Xiaoqiang Fan,Xiutong Wang,Baorong Hou 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-

Improving the mechanical stability and anti-corrosion durability of superhydrophobic material remains agreat challenge that has not been solved. In this paper, we designed and prepared two types of superhydrophobiccoatings using PTFE nanoparticles and waterborne epoxy resin, viz. superhydrophobicPTFE@epoxy single layer coating and superhydrophobic Epoxy + PTFE@epoxy double layer coating. Itwas found that the mechanical stability and interfacial bonding of the superhydrophobic composite coatingswere further improved by introducing an epoxy resin intermediate layer. The superhydrophobicEpoxy + PTFE@epoxy double layer coating maintained excellent non-wetting superhydrophobicity evenafter 150 sandpaper abrasion and 160 tape-peeling cycles. The electrochemical testing results showedthat the Rct and low-frequency modulus values of the superhydrophobic double layer coating improvedby 7–8 orders of magnitude compared with the bare Q235 carbon steel substrate, demonstrating excellentcorrosion resistance. In addition, the coating maintains good corrosion protection after 60 days ofoutdoor atmospheric exposure and 30 days of neutral salt spray acceleration tests, indicating superiorweathering resistance and long-term anti-corrosion properties. The coating also features delayed icing,self-cleaning, anti-fouling, chemical stability, and high substrate applicability, which provides longlastingmultifunctional superhydrophobic materials with comprehensive functions.

All-organic superhydrophobic coating with anti-corrosion, anti-icing capabilities and prospective marine atmospheric salt-deliquesce self-coalesce protective mechanism

Binbin Zhang,Mengying Qiao,Weichen Xu,Baorong Hou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-

Water-repellent and interfacial non-wetting superhydrophobicity has great potential to addresscorrosion/icing-induced material-deterioration problems. Herein, an all-organic superhydrophobic coatingwas constructed using facile and substrate-independent spray-coating method based on PTFE andPDMS. FE-SEM, EDS, and XPS techniques were used to analyze the surface topographies and chemicalcompositions. The coating exhibits superior anti-fouling and self-cleaning properties against various liquidand solid contaminants due to the synergic effect of low surface energy and hierarchical structures. The EIS and potentiodynamic polarization results show improved charge transfer resistance (Rct), positiveshifted corrosion potential (Ecorr), and decreased corrosion current density (Icorr), implying significantlyenhanced anti-corrosion performance with 99.83 % inhibition efficiency. Besides, the delay rate of icefreezingtime of the coating is 232 % at 5C, 137 % at 10 C and 204 % at 15 C compared withuncoated Q235 substrate respectively. The ice adhesion strength of the coating accounts for only6.55 % at 5C, 7.03 % at 10 C and 9.35 % at 15 C than that of the bare Q235 carbon steel, demonstratingultra-low ice adhesion force and anti-icing capabilities. The hygroscopic and deliquesce behaviorsof NaCl salt particles reveal an intriguing salt-deliquescence self-coalescence phenomenon andprospective anti-corrosion mechanism for superhydrophobic materials in high-humidity marine atmosphericenvironments.

Supercapacitors based on a nitrogen doped hierarchical porous carbon fabricated by self-activation of biomass: excellent rate capability and cycle stability

Zhang Zhijian,He Jingjing,Tang Xingchang,Wang Yuling,Yang Binbin,Wang Kunjie,Zhang Deyi 한국탄소학회 2019 Carbon Letters Vol.29 No.6

Energy and environmental are always two major challenges for the sustainable development of the modern human being. For avoiding the serious environmental pollution caused in the fabrication process of porous carbon, a popular energy storage material, we reported a facile, green and activating agent free route hereby directly carbonizing a special biomass, Glebionis coronaria. A nitrogen doped hierarchical porous carbon with a specific surface area of up to 1007 m2 g−1 and a N doping content of up to 2.65 at.% was facilely fabricated by employing the above route. Benefiting from the peculiarly hierarchical porous morphology, enhanced wettability and improved conductivity, the obtained material exhibits superior capacitance performance, which capacitance reaches up to 205 F g−1 under two-electrode configuration, and no capacitance loss is observed after 5000 cycles. Meanwhile, the capacitance retention of the obtained material arrives up to 95.0% even under a high current density of 20 A g−1, illuminating its excellent rate capability. The fabricated nitrogen-doped hierarchical porous carbon with larger capacitance than commercial activated carbon, excellent rate capability and cycle stability is an ideal cost-efficient substitution of commercial activated carbon for supercapacitor application.

New Formula ZD4IgS_Q Applied to Solving Future Nonlinear Systems of Equations with Abundant Numerical Experiment Verification

Yunong Zhang,Jinjin Guo,Binbin Qiu,Yang Shi,Zhi Yang 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10

In this paper, a new formula called Zhang discretization 4-instant g-square with subtype Q (i.e., ZD4IgS_Q) is proposed, which is used for discretizing continuous-time zeroing neurodynamics (CTZN) model. Besides, in order to solve future nonlinear systems of equations (FNSoE), also termed discrete time-varying nonlinear systems of equations, a ZD4IgS_Q-type discrete-time zeroing neurodynamics (DTZN) model with O(g³) steady-state residual error pattern is acquired by adopting the formula ZD4IgS_Q. For comparison purposes, an Euler-type DTZN model with O(g²) steadystate residual error pattern is also presented. Abundant numerical experimental results show that, compared with Eulertype DTZN model, the ZD4IgS_Q-type DTZN model has better computational performance in terms of solving FNSoE.

Supercapacitors based on a nitrogen doped hierarchical porous carbon fabricated by self‑activation of biomass: excellent rate capability and cycle stability

Zhijian Zhang,Jingjing He,Xingchang Tang,Yuling Wang,Binbin Yang,Kunjie Wang,Deyi Zhang 한국탄소학회 2019 Carbon Letters Vol.29 No.6

Energy and environmental are always two major challenges for the sustainable development of the modern human being. For avoiding the serious environmental pollution caused in the fabrication process of porous carbon, a popular energy storage material, we reported a facile, green and activating agent free route hereby directly carbonizing a special biomass, Glebionis coronaria. A nitrogen doped hierarchical porous carbon with a specific surface area of up to 1007 m2 g−1 and a N doping content of up to 2.65 at.% was facilely fabricated by employing the above route. Benefiting from the peculiarly hierarchical porous morphology, enhanced wettability and improved conductivity, the obtained material exhibits superior capacitance performance, which capacitance reaches up to 205 F g−1 under two-electrode configuration, and no capacitance loss is observed after 5000 cycles. Meanwhile, the capacitance retention of the obtained material arrives up to 95.0% even under a high current density of 20 A g−1, illuminating its excellent rate capability. The fabricated nitrogen-doped hierarchical porous carbon with larger capacitance than commercial activated carbon, excellent rate capability and cycle stability is an ideal cost-efficient substitution of commercial activated carbon for supercapacitor application.

Quantitative Proteomic Analysis Reveals Up-Regulation of Type I Collagen During Tumorigenesis of Colorectal Cancer

Xia Zou,Bo Feng,Taotao Dong,Binbin Tan,Hao Shen,Xiu Zhang,Menghui Zhang,Minhua Zheng,Yan Zhang 한국당과학회 2012 한국당과학회 학술대회 Vol.2012 No.1

Colorectal cancer (CRC) is one of the most prevalent cancers in the world with high mortality and morbidity rates. In this study, we have performed comparative proteomic profiling of sera from CRC patients at stage I (n=17), stage II (n=40), stage III (n=24) and healthy subjects (n=25) to gain a global view of protein expression change during CRC tumorigenesis and provide potential targets for CRC diagnosis and treatment. As a result, a total of 93 proteins were found differentially expressed in CRC patients with a label-free quantitative APXE method. After GO and KEGG pathway analysis, those proteins most frequently involved in ECM-receptor interaction, complement and coagulation cascades. As important as components of ECM, we found several collagens in CRC serum had been changed from tumor stage I to IV. And the validation of collagen I (COL1) at RNA and protein expression level shown extremely comparable to pooled serum proteomic results using independent 26 paired tumor and matched normal colorectal tissues. Those findings indicated that the change of collagen I observed in serum were indeed from pathogenic lesion of colorectal tissue. Moreover, we further investigated serum levels of COL1, PICP (the synthesis indicator) and CTx (the breakdown indicator) in 77 CRC patients and 33 normal controls by ELISA. The results showed PICP and CTx were better for discriminating normal from cancer groups as well as non-metastatic from metastatic tumor than COL1. Finally, we evaluated the expression of MMPs in paired tumor and normal tissues from patients with different stages. Notably, the expression of MMP1, 7 and 14 were remarkably enhanced in carcinoma tissues and the trend were parallel with the progression of tumor stage. The expression of E-cadherin and CDX2, which had been considered as targets of COL1 in cell models, were also verified in tissues and displayed decrease in tumor. Overall, COL1 might be affected by MMP1, 7, 14 and had effects on cell adhesion and differentiation through E-cadherin and CDX2.

Analysis of the Operating Principle and Parameter Design for the Modular Multilevel DC/DC Converter

Binbin Li,Shaolei Shi,Yibo Zhang,Rongfeng Yang,Gaolin Wang,Dianguo Xu 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6

The modular multilevel converter (MMC) has become more and more attractive in the field of high-voltage high-power dc/ac power conversions. In the very recent years, the dc/dc modular multilevel converter is proposed intended for high-voltage dc/dc applications, such as the solid-state transformers and future dc-grid networks, which is extended from the traditional MMC. However, it remains unknown how to optimize the operation of this dc/dc modular multilevel converter and how to dimension the parameters of the elements in it. In this paper, a detailed analysis is performed to indentify the operating principle of the dc/dc modular multilevel converter. Using these analyses, the selection rules and parameter design method of the components are given to maximize the utilization ratio, improve the power density, and increase efficiency. Finally, the validity and effectiveness of this paper are verified by simulation results.

An IGBT Open-Circuit Fault Detection Method for Modular Multilevel Converters

Binbin Li,Yi Zhang,Rongfeng Yang,Gaolin Wang,Dianguo Xu 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6

Recently, the modular multilevel converter (MMC) has attracted increasing attentions due to its distinctive features, especially in the application of HVDC power transmission. One of the most significant characteristic of MMC is that it is composed of identical low-voltage submodules (SMs). As a result, the low-voltage IGBTs can be employed in each SM as the main power switch. However, since an MMC station usually contains hundreds of SMs, the IGBT becomes the most fragile component. In this paper, the failure characteristics of the IGBT open-circuit fault in a SM are firstly analyzed. Then, an observer-based IGBT open-circuit detection method is proposed, which can accurately detect the fault by comparing the estimated values with the actual sampled values. Finally, the validity and effectiveness of the proposed fault detection method are demonstrated by experimental results based on a single-phase MMC prototype in the laboratory.