粉煤灰超疏水不锈钢网的制备及油水分离

采用树脂粘接法,将硬脂酸修饰后的粉煤灰用环氧树脂粘接在不锈钢网骨架表面,制备了超疏水不锈钢网,并对其进行了TEM、SEM、FTIR和接触角等表征。结果显示,在高倍显微镜下改性后的超疏水不锈钢网表面呈一定粗糙度的微纳米分级结构,静态水接触角高达153°。此外,该超疏水不锈钢网具有良好的机械稳定性和超疏水耐久性,其表面经机械磨损100次后水静态接触角仍高达141°。该材料用于多种油/有机溶剂与水混合液的分离中,分离效率均高于94%。     

粉煤灰超疏水不锈钢网的制备及油水分离

采用树脂粘接法,将硬脂酸修饰后的粉煤灰用环氧树脂粘接在不锈钢网骨架表面,制备了超疏水不锈钢网,并对其进行了TEM、SEM、FTIR和接触角等表征。结果显示：在高倍显微镜下改性后的超疏水不锈钢网表面呈一定粗糙度的微纳米分级结构,静态水接触角高达153°。此外,该超疏水不锈钢网具有良好的机械稳定性和超疏水耐久性,其表面经机械磨损试验100次后水静态接触角仍高达141°。该材料用于多种油/有机溶剂与水的混合液的分离中,分离效率均高于94%。     

耐腐蚀超疏水超亲油不锈钢网的制备及其在油水分离过程中的应用

以不锈钢网为基底,通过化学刻蚀法制备微米级粗糙表面,通过一步浸泡法将st9ber法制得的疏水亲油纳米Si O2颗粒沉积到粗糙的不锈钢网表面,制备了具有微纳二级粗糙结构的超疏水超亲油不锈钢网。利用扫描电子显微镜(SEM)、傅里叶变换红外光谱仪(FT-IR)和接触角测量仪(CA)表征了超疏水超亲油不锈钢网的表面形貌、化学组成和润湿性能,并将其用于油水分离过程中。结果表明,疏水亲油纳米Si O2颗粒成功的沉积到不锈钢网表面;水滴在超疏水超亲油不锈钢网上的接触角最大为151°,煤油的接触角为0°;制备的超疏水超亲油不锈钢网不仅能高效的分离不同种类油和水的混合物,还能高效的分离油和腐蚀性液体(强酸或强碱水溶液)的混合物,其耐腐蚀特性可满足复杂环境下的油水分离要求。     

室温下ZnO超疏水表面的制备及其油水分离性能

利用简便的液相法,在室温下于不锈钢网上沉积ZnO纳米片和纳米花粗糙结构,接着通过浸渍硬脂酸制备了超疏水不锈钢网.对沉积后的不锈钢网表面形貌、晶体结构、润湿性能、耐磨性能、油水分离性能等进行表征与测定.结果表明,该不锈钢网表面由纳米片和纳米花组成的微纳米结构ZnO构成,具有超疏水性,水接触角为161°;油水分离效率达98...     

室温下ZnO超疏水表面的制备及油水分离性能

利用简便的液相法,在室温下于不锈钢网上沉积ZnO纳米片和纳米花粗糙结构,接着通过浸渍法修饰低表面能物质硬脂酸,制备了超疏水不锈钢网。对沉积后的不锈钢网表面形貌、晶体结构、润湿性能、耐磨性能、油水分离性能等进行表征与测定。结果表明,该不锈钢网表面由纳米片和纳米花组成的微纳米结构ZnO构成,具有超疏水性,水接触角161 °;油水分离效率达98%,循环使用20次后分离效率仍保持在95.5%以上;具有良好的机械耐磨性,在高盐环境中表现出化学稳定性。     

基于不锈钢网超疏水涂层的制备及其油水分离应用研究

通过凝胶-溶胶法制备纳米二氧化硅粒子,并使用二甲基二乙氧基硅烷进行疏水改性。采用直接浸泡法在100目不锈钢网表面成功构造出了纳米级粗糙结构。并研究了浸泡次数和老化时间对样品表面润湿性的影响,同时用自制的油水分离装置进行油水分离实验。结果表明:样品对水的接触角达155°,油水分离效率达92%。     

超疏水不锈钢网的制备及其雾水收集性能研究

通过在不锈钢网上包覆沸石涂层并用氟硅烷改性制备出稳固的超疏水网格,并考察其雾水收集性能。水热反应时间为24 h时,水滴在改性后的不锈钢网上的接触角最大为155°,达到超疏水效果,且对水滴的粘附力低。雾水收集实验结果表明,与未处理的不锈钢网相比,超疏水网格的收集速率最大提升93%。此外超疏水网格具有良好的稳定性,分别在1 mol/L HCl、1 mol/L Na OH和3.5%Na Cl溶液中浸泡48 h后,网格仍然表现出良好的疏水与雾水收集效果;在2 000目砂纸上经60个磨损循环后,接触角仍能达到145°,雾水收集性能优异。     

有机硅改性凹凸棒土制备耐久型超疏水涂层的研究

以凹凸棒土（ATP）、正硅酸乙酯（TEOS）、十六烷基三甲氧基硅烷（HDTMS）和γ-甲基丙烯酰氧基丙基三甲氧基硅烷（MPTMS）为主要原料，经Stober法制得HDTMS/MPTMS-ATP改性颗粒，进一步与聚二甲基硅氧烷（PDMS）复配制备耐久型超疏水涂层。通过透射电镜（TEM）、扫描电子显微镜（SEM）、原子力显微镜（AFM）、傅立叶变换红外光谱（FT-IR）、接触角测量仪对改性ATP及涂层的结构、形貌和润湿性进行了表征，重点考察了改性ATP与PDMS质量比对涂层性能的影响。结果表明：改性ATP中C=C双键与PMDS中Si—H键经加成反应形成了颗粒与成膜物间稳定的Si—C共价结构；当改性ATP与PDMS质量比为3∶5时，涂层水接触角和滚动角达160.5°和2.8°，附着力为1级，经80次砂纸打磨、100次抗剥离测试、24 h酸碱溶液浸泡后仍具有超疏水性。     

硅烷偶联剂表面改性二氧化钛粒子超疏水性能研究

针对无机二氧化钛（TiO2）粒子在有机体系中的分散性问题,采用硅烷偶联剂KH-570对无机填料钛白粉（二氧化钛,TiO2）的表面进行有机化改性;并通过红外光谱（FT-IR）、接触角测试、沉降实验、扫描电子显微镜（SEM）等手段表征表面改性TiO2粒子的结构,测试其超疏水性能,分析超疏水表面形成的机理。结果表明,经KH-570表面改性的TiO2粒子的疏水性和分散性得到明显改善,当KH-570质量分数达到15%时,表面改性的TiO2涂层与水的静态接触角达152.5˚,表现出良好的超疏水性能。     

高通量葡萄糖酸改性不锈钢网的制备及其油水分离性能研究

采用一步法将不锈钢网进行酸刻蚀并吸附葡萄糖酸(GA),成功制备了超亲水-水下超疏油的葡萄糖酸改性不锈钢网(GAG-网)。采用扫描电子显微镜、X-射线光电子能谱仪对GAG-不锈钢网表面形貌和化学组分进行表征,结果表明GA成功地吸附在了不锈钢网上和网表面成功构造微纳米粗糙结构。采用接触角测量仪对其表面进行了润湿性测试,在空气中,水滴在其表面接触角为0°;在水下,油滴在其表面接触角大于150°。GAG-网能够有效地分离多种油水混合物,分离效率均达到98%以上,分离通量达140 L·(m~2·s)~(-1);分离正己烷/水的混合物40次后仍具有99.5%以上的分离效率;在腐蚀性环境中也具有优异的分离能力。该方法简单绿色,制备过程无需任何电器和机械设备。制备的GAG-网油水分离性能优异,在处理油水混合物方面具有潜在的应用前景。     

ZnO nanorod array-coated mesh film for the separation of water and oil

Dense and vertically aligned ZnO nanorod arrays with a large area have been fabricated successfully on the stainless steel mesh by a simple chemical vapor deposition method. The coated mesh exhibited both superoleophilic and superhydrophobic properties, even if it was not modified by low surface energy materials. The separation efficiencies were more than 97% in the filtration of water and oil. Besides, the wettability of the coated mesh was still stable after it was soaked in the corrosive solutions for 1 h. A detailed investigation showed that the coated mesh has the best superhydrophobic property when the stainless steel mesh pore size was about 75 μm.     

Single-step prepared hybrid ZnO/CuO nanopowders for water repellent and corrosion resistant coatings

In this study, ZnO/CuO hybrid hydrophobic nanopowders were synthesized using a common single-step chemical precipitation route without using modifiers. Influence of initial ZnO:CuO precursor concentrations and alkaline agent type on the wettability behavior of the prepared samples were investigated. Wettability properties of the prepared samples were assessed by measuring the water contact angle and contact angle hysteresis values. Fourier transform infrared spectra, scanning electron microscope micrographs and X-ray diffraction patterns were applied to identify the surface chemistry and morphological features. Scanning electron microscope images of the synthesized ZnO/CuO nanocomposites indicated flower-like morphologies containing plenty of nano-needles, -rods, and -sheets with thicknesses lower than 90 nm. The sample prepared under the optimum conditions was superhydrophobic having water contact angle and contact angle hysteresis of 162.6°±1 and 2°, respectively. It was applied to coat the surface of stainless steel meshes by spray deposition method. The resultant superhydrophobic surface exhibited excellent self-cleaning (water repellency) property and a suitable stabilities under the ambient and saline solution (NaCl, 3.5%) media. Additionally, electrochemical corrosion tests confirmed that the corrosion resistance of the fabricated ZnO–CuO coating was higher than the initial bare mesh.     

The performance of superhydrophobic and superoleophilic carbon nanotube meshes in water–oil filtration

Vertically-aligned multi-walled carbon nanotubes (CNTs) were grown on stainless steel (SS) mesh by thermal chemical vapor deposition with a diffusion barrier of Al₂O₃ film. These three-dimensional porous structures (SS-CNT meshes) were found to be superhydrophobic and superoleophilic. Water advancing contact angles of 145–150° were determined for these SS-CNT meshes in air and oil (gasoline, isooctane). Oil, on the other hand, completely wet the SS-CNT meshes. This combined superhydrophobic and superoleophilic property repelled water while allowed the permeation of oil. Filtration tests demonstrated efficiencies better than 80% of these SS-CNT meshes as the filtration membranes of the water-in-oil emulsions. We have conducted quantitative analysis on the diameters of the oil droplets in both the feed emulsion and the filtrate. Then, we have evaluated the issue of water blockage and possible way to improve the filtration efficiency. Finally, the filtration and blockage mechanisms are proposed.     

A novel composite coating mesh film for oil-water separation

Polytetrafluoroethylene-polyphenylene sulfide composite coating mesh film was successfully prepared by a simple layered transitional spray-plasticizing method on a stainless steel mesh. It shows super-hydrophobic and super-oleophilic properties. The contact angle of this mesh film is 156.3° for water, and close to 0° for diesel oil and kerosene. The contact angle hysteresis of water on the mesh film is 4.3°. The adhesive force between the film and substrate is grade 0, the flexibility is 1 mm and the pencil hardness is 4H. An oil-water separation test was carried out for oil-contaminated water in a six-stage superhydrophobic film separator. The oil removal rate can reach about 99%.     

A hierarchical mesh film with superhydrophobic and superoleophilic properties for oil and water separation

BACKGROUND: Solid surfaces possessing both superhydrophobic and superoleophilic properties have attracted great interest for fundamental research and potential application. However, fabrication of the reported surfaces is usually time‐consuming and the wetability of the surfaces could not be achieved to the desired level in rugged environments. RESULTS: A hierarchical stainless steel mesh film comprising structures with three scales of roughness was synthesized by a simple chemical bath deposition method. After being modified with a low surface energy material e.g. Teflon, these films exhibit superhydrophobic and superoleophilic properties. In this study it was demonstrated that the unique properties of the as‐prepared films match well with the requirements for the effective separation of oil and water mixtures. CONCLUSION: It was confirmed that the unique surface wetability of the surface is due to the cooperative effect of the hierarchical structures of the stainless steel mesh films and the natural low surface tension of Teflon. Furthermore, fabrication is simple and economic, and the surface exhibited robust durability even in a rugged environment. Copyright © 2011 Society of Chemical Industry     

不锈钢网负载Al-beta分子筛涂层的制备及其在油水分离中的应用

使用二次生长法在不锈钢网表面制备了Al-beta分子筛涂层,并通过扫描电镜、X射线衍射和接触角检测对其进行了表征。Al-beta分子筛晶粒以球形呈现在不锈钢网表面,并相互交联而构成微纳双级粗糙结构,Al-beta涂层表现出超亲水和水中超疏油性质。将不锈钢网负载Al-beta分子筛涂层用于分离一系列油水混合物,并考察了其耐久性和稳定性。实验结果表明,不锈钢网负载Al-beta分子筛涂层在重复使用100次后其正己烷/水分离效率仍保持在97.1%以上,酸、碱和超声等处理对其形貌和油水分离效率几乎没有影响,具备优异的耐久性、自清洁性和稳定性,在实际油水分离过程中有很大应用潜力。     

Mechanical,chemical and wetting properties of a superhydrophobic surface based on functionalized ZrO2 on stainless steel

A stable superhydrophobic FAS-ZrO₂ (FZr-ESS) surface was created by chemically etching and modifying a 304 stainless steel substrate. The effect of etching parameters such as time and temperature on the surface wetting properties was studied and optimized. The etched steel surface exhibited a honeycomb-like microstructure that, coupled with the low surface energy of the fluorinated ZrO₂ nanoparticles, produced a FZr-ESS surface with a surface contact angle (CA) of 165.9° and a sliding angle (SA) of 1.7°. The presence of highly stable functionalized ZrO₂ conjugated to the steel matrix contributed to the surface's outstanding mechanical stability, as confirmed by tape peeling and sandpaper abrasion tests. Furthermore, the FZr-ESS surface demonstrated exceptional chemical stability under a variety of pH conditions due to its excellent water repellency. An electrochemical test showed that the resulting surface was highly resistant to corrosion, with the corrosion current density reduced by nearly two orders of magnitude compared to bare stainless steel. The superhydrophobic FZr-ESS surface also displayed excellent long-term stability, wetting diversity, and self-cleaning behavior, making it highly versatile for a range of applications.