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Self-cleaning of superhydrophobic nanostructured surfaces at low humidity enhanced by vertical electric field

Nano Research 2022年第5期15卷 4732-4738页

作者： Yijie Liu Yujun Guo Xueqin Zhang Guoqiang Gao Chaoqun Shi Guizao Huang Pengli Li Qi Kang Xingyi Huang Guangning Wu College of Electrical Engineering Southwest Jiaotong UniversityChengdu 611756China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingState Key laboratory of Metal Matrix CompositesShanghai Jiaotong UniversityShanghai 200240China

Self-cleaning is the key factor that makes superhydrophobic nanostructured materials have wide *** self-cleaning effect,however,strongly depends on formations and movement of water droplets on superhydrophobic nanostructured surfaces,which is greatly restricted at low humidity(low humidity in which the pollution is electro-aggregated and driven in the electric field to achieve the aggregation and cleaning large *** cleaning efficiency of this method is much higher than that of water droplet roll-off,and will not produce"pollution bands".A simplified numerical model describing pollution movements is *** results are consistent with experimental *** proposed method realizes the self-cleaning of superhydrophobic nanostructured surfaces above dew point curve for the first time,which extends applications of superhydrophobic nanostructured materials in low humidity,and is expected to solve self-cleaning problems of outdoor objects in low humidity areas(<5.0 g·kg^(-1)).

关键词： self-cleaning electric field low humidity electro-aggregation superhydrophobic nanostructured surface

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Preparation of functional ordered mesoporous carbons and their application as the QCM sensor with ultra-low humidity

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Chinese Chemical Letters 2020年第8期31卷 2150-2154页

作者： Ye Zhu Weijia Zhang Jiaqiang Xu The State Key Laboratory of Molecular Engineering of Polymers Department of ChemistryFudan UniversityShanghai 200433China Department of Physics&Department of Chemistry College of ScienceShanghai UniversityShanghai 200444China

Ordered mesoporous carbon(OMCs)FDU-15 was synthesized through an EISA(Evaporation-Induced Self-Assembly)method,and the oxidized OMCs(FDU-15-COOH)were obtained by subsequent oxidation treatments in liquid phase to introduce functional groups,The samples were characterized by XRD,TEM,FT-IR and nitrogen adsorption-desorption test,The low humidity sensing performances of FDU-15 and FDU-15-COOH thin films were investigated by using a quartz crystal microbalance(QCM)*** responses of FDU-15-COOH is higher than that of the pristine FDU-15 at very low humidity(low humidity QCM sensor.

关键词： low humidity Sensor Mesoporous carbon Functional QCM

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Enhanced low-humidity performance of proton-exchange membrane fuel cell by introducing hydrophilic CNTs in membrane electrode assembly

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Progress in Natural Science:Materials International 2022年第2期32卷 150-156页

作者： Sanying Hou Hongqing Wang Jianwei Ren Chen Yao Lang Shi Shijun Liao School of Chemistry and Chemical Engineering University of South China Energy Centre Council for Scientific and Industrial Research (CSIR) School of Chemistry and Chemical Engineering South China University of Technology

Hydrophilic carbon nanotubes(HCNTs) were introduced into the membrane electrode assembly(MEA) to improve its low-humidity *** effects of types,placement,loading,and relative humidity on the MEA performance were *** has been found that the MEA with 20 wt% HCNTs loading both in anode and cathode achieved the best self-humidifying *** current density reached 1550 mA cm-2at 0.6 V,with a maximum power density of 953 mW/cm~2 at 70℃,30 psi and 30% relative humidity ***,the stability test shows that its current density at 0.6 V only decreased by 6.4% after 44 h performance test,while the performance of blank MEA without HCNTs decreased by 45% within 6 h testing *** extraordinary performance under low humidity condition is ascribed to that the HCNTs contained in the MEA improve the water management and mass transportation by functioning as a dispersant and hydrophilic agent.

关键词： Membrane electrode assembly low humidity Carbon nanotubes Power density Stability

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