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Slippery Surface with Petal-like Structure for Protecting Al Alloy: Anti-corrosion, Anti-fouling and Anti-icing

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Journal of Bionic Engineering 2022年第1期19卷 83-91页

作者： Junfei huang Jiajie Kang Jiaxu Zhang jinxia huang Zhiguang Guo School of Engineering and Technology China University of GeosciencesBeijing100083China Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan430062China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China Zhengzhou Institute China University of Geosciences(Beijing)Zhengzhou451283China

The harsh working environment affects the performance and usage life of Al and its alloys,thus limiting their application.In recent years,Slippery Liquid-infused Porous Surface(SLIPS)has attracted much attention due to excellent anti-corrosion,anti-fouling and anti-icing properties.This may be an effective way to improve the properties of Al and its alloys.Here,the SLIPS with petal-like structure was constructed on the Al alloy via simple hydrothermal reaction,Stearic Acid(STA)modification and lubricant injection.A variety of droplets(including oil-in-water emulsions)can slide on the SLIPS at a low angle,even the Sliding Angle(SA)of the water droplet is only 3°.Furthermore,the SLIPS exhibits outstanding mechanical and chemical properties.It can maintain fine oil-locking ability under high shearing force and keep slippery stability after immersion in acid/alkaline solutions.In addition,the SLIPS possesses excellent anti-corrosion,anti-fouling and anti-icing properties,which provides a new way to promote the application of Al and its alloys.Therefore,the SLIPS is expected to be an effective way to improve the properties of Al and its alloys,as well as play a role in anti-fouling and self-cleaning in construction,shipbuilding and automotive manufacturing industries,thereby expanding the practical application of Al and its alloys.

关键词： Slippery surface Al alloy Anti-corrosion Anti-fouling Anti-icing

Lubricant self-replenishing slippery surface with prolonged service life for fog harvesting

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Friction 2022年第10期10卷 1676-1692页

作者： Yi CHEN Weimin LIU jinxia huang Zhiguang GUO State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan 430062China

Slippery lubricant-infused surfaces exhibit excellent fog-harvesting capacities compared with superhydrophobic and superhydrophilic surfaces.However,lubricant depletion is typically unavoidable under dynamic conditions,and reinfused oil is generally needed to recover the fog-harvesting capacity.Herein,an effective strategy for delaying the depletion of lubricant to prolong the service life of fog harvesting is proposed.An ultrathin transparent lubricant self-replenishing slippery surface was fabricated via facile one-step solvent evaporation polymerization.The gel film of the lubricant self-replenishing slippery surface,which was embedded with oil microdroplets,was attached to glass slides via the phase separation and evaporation of tetrahydrofuran.The gel film GFs-150(with oil content 150 wt%of aminopropyl-terminated polydimethyl siloxane(PDMS–NH2))exhibited superior slippery and fog-harvesting performance to other gel films.Furthermore,the slippery surfaces with the trait of oil secretion triggered by mechanical stress exhibited better fog-harvesting capabilities and longer service life than surfaces without the function of lubricant self-replenishment.The lubricant self-replenishing,ultrathin,and transparent slippery surfaces reported herein have considerable potential for applications involving narrow spaces,visualization,long service life,etc.

关键词： prolonged service life lubricant self-replenishing slippery liquid-infused surfaces fog harvesting

Advance in Structural Classification and Stability Study of Superamphiphobic Surfaces

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Journal of Bionic Engineering 2023年第1期20卷 366-389页

作者： Haili Zhang Deke Li jinxia huang Zhiguang Guo Weiming Liu Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials School of Materials Science and Engineering and Hubei Key Laboratory of Polymer MaterialsHubei UniversityWuhan430062China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China School of Materials Engineering Lanzhou Institute of TechnologyLanzhou730050China

Superamphiphobic surfaces have great potential applications in flame resistance,anti-icing,self-cleaning,anti-adhesion,micro-flow control and so on.However,the surface durability is poor owing to the limitation of design principles.In recent years,a lot of efforts have been carried out on the morphology,structure,and stability of superamphiphobic surfaces,resulting in significant improvement in their surface superwetting properties.In this review,we present a brief classification of the morphological types of superamphiphobic surfaces and summary of the recent progress of researches on the stability of superamphiphobic surfaces.Several testing methods of mechanical and chemical stability are listed in the article,together with the characteristic results,to provide a better and more detailed understanding of the current research status on superamphiphobic surface stability,which will be of considerable importance as a reference guide for our future researches.Of course,there are still some issues that need to be addressed for the application of superamphiphobic surfaces at large scale,and this is where our future researches will be directed.Finally,we discuss the challenges as well as the prospects in the study of superamphiphobic surfaces.

关键词： Superamphiphobicity Structure Morphology Stability

A robust membrane with dual superlyophobicity for solving water-caused lubricant deterioration and water contamination

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Friction 2023年第8期11卷 1442-1454页

作者： Siyang ZHAO Chenggong XU Jiaxu ZHANG Yongmin LIANG Weimin LIU jinxia huang Zhiguang GUO State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China State Key Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou 730000China Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan 430062China

Lubricants are often contaminated by water in different ways. Water-polluted lubricants extremely accelerate wear corrosion, leading to the deterioration of lubricity performance. Recently, multiphase media superwettability has been developed to endow one surface with compatible functions, such as on-demand separation of oily wastewater. However, realizing the robustness of the dual superlyophobic surface to solve water-caused lubricant deterioration and water contamination as needed remains challenges. Herein, a robust dual superlyophobic membrane is presented to realize on-demand separation for various lubricant–water emulsions. Compared to pure lubricants, the purified lubricants have equivalent tribology performance, which are much better than that of water-polluted lubricants. The as-prepared membrane maintains dual superlyophobicity, high-efficient for water or lubricant purification, and excellent tribology performance of the purified lubricant, even after immersion in hot liquids for 24 h, multicycle separation, and sandpaper abrasion for 50 cycles. Water-polluted lubricant extremely accelerates wear corrosion to promote catalytic dehydrogenation of lubricants, generating too much harmful carbon-based debris. This work shows great guiding significance for recovering the tribology performance of water-polluted lubricants and purifying water by the dual superlyophobic membrane.

关键词： dual superlyophobicity lubricant water on-demand separation tribology performance

Electron transfer dominated triboelectrification at the hydrophobic/slippery substrate-water interfaces

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Friction 2023年第6期11卷 1040-1056页

作者： Yi CHEN Xiaojuan LI Chenggong XU Daoai WANG jinxia huang Zhiguang GUO Weimin LIU State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan430062China University of Chinese Academy of Sciences Beijing100049China

Triboelectric nanogenerator(TENG)based on triboelectrification has attracted wide attention due to its effective utilization of green energy sources such as marine energy.However,researches about liquid-liquid triboelectrification are still scanty as solid-liquid triboelectrification has been widely studied.Herein,this work focuses on the hydrophobic/slippery substrate-water interfacial triboelectrification based on the solid friction materials of polytetrafluoroethylene(PTFE)nanoparticles.The hydrophobic/slippery substrate-water interfacial triboelectrification are studied by assembling PTFE coated Al sheets and perfluoropolyether(PFPE)infused PTFE coated Al sheets(formed the slippery lubricant-infused surfaces(SLIPSs))as the friction electrode,and water as liquid friction materials,respectively.The results show that the hydrophobic TENG output performances improved as the PTFE nanoparticles cumulating,and the SLIPSs TENG output performances increased with the thinner PFPE thickness.Both the triboelectrification behavior of hydrophobic/SLIPSs TENG assembled in this work are dominated by the electron transfer.Thanks to the introduction of SLIPSs,the SLIPSs TENG exhibits superior stability and durability than the hydrophobic TENG.The investigation of hydrophobic/slippery substrate-water interfacial triboelectrification contributes to optimize the TENG performances,and expands the application in harsh environments including low temperature and high humidity on the ocean.

关键词： triboelectric nanogenerator(TENG) slippery lubricant-infused surfaces(SLIPSs) polytetrafluoroethylene(PTFE)nanoparticles perfluoropolyether(PFPE)

建筑用不同取代率粉煤灰再生混凝土的力学性能及耐久性能研究

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功能材料 2024年第4期55卷 4121-4126页

作者：翟思敏黄金霞河北科技学院建筑工程管理学院河北保定071000

以废弃混凝土为再生骨料,采用湿法粉磨处理I级粉煤灰,制备出不同取代率粉煤灰再生混凝土,通过XRD、SEM、力学性能测试、干缩率测试等手段,研究了不同取代率的I级粉煤灰对再生混凝土的力学性能和耐久性能的影响。结果表明,湿法粉磨处理... 详细信息

以废弃混凝土为再生骨料,采用湿法粉磨处理I级粉煤灰,制备出不同取代率粉煤灰再生混凝土,通过XRD、SEM、力学性能测试、干缩率测试等手段,研究了不同取代率的I级粉煤灰对再生混凝土的力学性能和耐久性能的影响。结果表明,湿法粉磨处理后的粉煤灰表面玻璃体被破坏,火山灰效应增强,从而提高了再生混凝土的水化速率,使水化产物C—S—H和AFt数量增加,混凝土密实度增大。粉煤灰再生混凝土的抗压强度随粉煤灰取代率的增大先增大后降低,粉煤灰取代率45%的混凝土的抗压强度最大为42.05 MPa,其水化产物Ca(OH)_(2)的含量最多为11.742%。挠度测试表明,粉煤灰取代率45%的混凝土屈服阶段对应的载荷为217 N,挠度最大为1.7 mm,在28 d时粉煤灰取代率45%的混凝土的干缩率最低为1.021×10^(-4)。综合可知,粉煤灰取代率45%的混凝土性能最优。

关键词：粉煤灰再生混凝土取代率力学性能挠度干缩率

纳米填料改性环氧树脂建筑保温材料的制备及性能研究

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功能材料 2024年第3期55卷 3102-3106,3121页

作者：翟思敏黄金霞河北科技学院建筑工程管理学院河北保定071000

环氧树脂基混凝土作为一种绿色环保的建筑材料,在道路修补和保温建筑中应用广泛。以环氧树脂E44为原料,二甲苯为稀释剂,纳米玻璃纤维为填料,制备了复合环氧树脂基混凝土,研究了不同纳米玻璃纤维长度对混凝土微观形貌、力学性能和保温性... 详细信息

环氧树脂基混凝土作为一种绿色环保的建筑材料,在道路修补和保温建筑中应用广泛。以环氧树脂E44为原料,二甲苯为稀释剂,纳米玻璃纤维为填料,制备了复合环氧树脂基混凝土,研究了不同纳米玻璃纤维长度对混凝土微观形貌、力学性能和保温性能的影响。结果表明,纳米玻璃纤维的掺杂发挥了“晶种”作用,促进了水化反应的进行,提高了环氧树脂基混凝土的密实度。纳米玻璃纤维长度的适当增加提高了混凝土与纤维的结合强度,当纳米玻璃纤维长度为8 mm时,混凝土的形貌最佳。随着纳米玻璃纤维长度的增加,混凝土的抗压强度和抗折强度先增大后降低。养护28 d,当纳米玻璃纤维长度为8 mm时,混凝土的抗压强度和抗折强度均达到最大值,分别为21.93和4.59 MPa。纳米玻璃纤维的掺杂改善了混凝土的孔结构,降低了导热系数,提高了保温性能,当纳米玻璃纤维长度为8 mm时,混凝土导热系数最低为0.147 W/(m·K),保温性能最佳。

关键词：环氧树脂纳米玻璃纤维保温材料混凝土力学性能导热系数

Manufacturing N,O-carboxymethyl chitosan-reduced graphene oxide under freeze-dying for performance improvement of Li-S battery

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International Journal of Extreme Manufacturing 2023年第1期5卷 282-305页

作者： Zhibin Jiang Lujie Jin Xiying Jian jinxia huang Hongshuai Wang Binhong Wu Kang Wang Ling Chen Youyong Li Xiang Liu Weishan Li School of Chemistry Engineering Research Center of MTEES(Ministry of Education)Research Center of BMET(Guangdong Province)Engineering Laboratory of OFMHEB(Guangdong Province)Key Laboratory of ETESPG(GHEI)and Innovative Platform for ITBMD(Guangzhou Municipality)South China Normal UniversityGuangzhouPeople’s Republic of China Shenzhen School Affiliated to Sun Yat-Sen University ShenzhenPeople’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhouPeople’s Republic of China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyMacao SARPeople’s Republic of China College of Energy Science and Engineering Nanjing Tech UniversityNanjingPeople’s Republic of China

Lithium-sulfur(Li-S) batteries can provide far higher energy density than currently commercialized lithium ion batteries, but challenges remain before it they are used in practice.One of the challenges is the shuttle effect that originates from soluble intermediates, like lithium polysulfides. To address this issue, we report a novel laminar composite, N,O-carboxymethyl chitosan-reduced graphene oxide(CC-rGO), which is manufactured via the self-assembly of CC onto GO and subsequent reduction of GO under an extreme condition of 1 Pa and-50°C. The synthesized laminar CC-rGO composite is mixed with acetylene black(AB) and coated on a commercial polypropylene(PP) membrane, resulting in a separator(CC-rGO/AB/PP) that can not only completely suppress the polysulfides penetration, but also can accelerate the lithium ion transportation, providing a Li-S battery with excellent cyclic stability and rate capability. As confirmed by theoretic simulations, this unique feature of CC-rGO is attributed to its strong repulsive interaction to polysulfide anions and its benefit for fast lithium ion transportation through the paths paved by the heteroatoms in CC.

关键词： composite manufacturing N O-carboxymethyl chitosan reduced graphene oxide separator lithium-sulfur battery

流域尺度下季节性休耕生态补偿标准的空间优化研究——以海河流域为例

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中国农村经济 2024年第3期 142-165页

作者：王夏林王转林王金霞严婷婷黄开兴北京大学现代农学院北京大学中国农业政策研究中心水利部发展研究中心

季节性休耕是地下水超采综合治理的重要措施,探究区域差异化的休耕生态补偿标准对于制定和完善休耕生态补偿机制、确保政策的可持续性具有重要意义。本文以作为中国粮食主产区和地下水超采最为严重的海河流域为例,基于生态补偿理论框架... 详细信息

季节性休耕是地下水超采综合治理的重要措施,探究区域差异化的休耕生态补偿标准对于制定和完善休耕生态补偿机制、确保政策的可持续性具有重要意义。本文以作为中国粮食主产区和地下水超采最为严重的海河流域为例,基于生态补偿理论框架,构建海河流域三级子流域尺度下的生态经济模型,并运用模型测算不同政策情景下各子流域空间优化的休耕生态补偿标准,模拟作物种植结构的变化和地下水压采效果。结果表明:海河流域区域差异化的休耕补偿标准取值范围为218~689元/亩。制定基于各子流域空间优化的休耕生态补偿标准可以激励农民压减冬小麦种植面积、调整作物种植结构,在保证农户的生产收益不受损失的前提下,实现更大的地下水压采目标。实施区域差异化的休耕生态补偿标准,在维持现行政策效果的前提下,可以减少10%的公共财政支出;在扩大政策覆盖范围的情况下,可使流域平均新增地下水压采量67立方米/亩;在财政资金有限的情况下,能够确保政策实施的有效性和可持续性。

关键词：季节性休耕地下水超采生态补偿标准空间优化海河流域