超疏水性

Abstract(#br)The polypropylene/polydimethylsiloxane/graphite fluoride (PP/PDMS/GF) composites are prepared with dynamic curing technology by simple blending of polypropylene, graphite fluoride and polydimethylsiloxane, and then their superhydrophobic properties are investigated. The results indicates that the static WCA reaches 148° with a sliding angle 6° for surface sandpapered PP/PDMS/GF\u003cce:hsp sp=\"0.25\"/\u003e=\u003cce:hsp sp=\"0.25\"/\u003e100/20/15 composite, which supplies a much economical and convenient method for preparing superhydrophobic materials.

Abstract(#br)Thin film of polydimethylsiloxane (PDMS) was deposited on SiO 2 nanoparticles by chemical vapor deposition, and SiO 2 became completely hydrophobic after PDMS coating. Mixtures of TiO 2 and PDMS-coated SiO 2 nanoparticles with various relative ratios were prepared, and distributed on glass surfaces, and water contact angles and photocatalytic activities of these surfaces were studied.

Abstract(#br)Ultra-High Performance Concrete (UHPC) is characterized by a densely packed mix-design, which can offer attractive surface properties for architectural building facades. A technical challenge for aesthetic applications is the protection against fouling. This work demonstrates that water-repellent concrete can be obtained just after demoulding by replicating the features of micro-pillared moulds made of polydimethylsiloxane (PDMS).

Abstract(#br)This study presents a convenient avenue to fabricate polydimethylsiloxane (PDMS) with controllable surface morphologies and wetting characteristics via standard molding technique. The templates with engineered surface roughness were simply prepared by combinations of microfluidics and photo-polymerization of N -Isopropylacrylamide (NIPAM). The surface morphology of mold could be adjusted via ultraviolet-curing duration or the grafting density, which means that the surface of PDMS sample replicated from the mold could also be easily controlled based on the proposed method.

Abstract(#br)Special wettability of biological surfaces usually depends on the unique micro-structures and surface chemistry natures. However, current preparation methods often involve complex processing steps or expensive moulds and have the limited ability to simulate these ordered and elaborate micro-structures. Herein, we report a facile and mould-free approach to fabricate special wetting surfaces by patterning an ordered porous structure with various geometric parameters via one-step 3D printing of Polydimethylsiloxane (PDMS) ink.

Abstract(#br)Commercial cotton fabric was coated with SiO 2 nanoparticles wrapped with a polydimethylsiloxane (PDMS) layer, and the resulting material surface showed a water contact angle greater than 160°. The superhydrophobic fabric showed resistance to water-soluble contaminants and maintained its original superhydrophobic properties with almost no alteration even after many times of absorption-washing cycles of oil. Moreover, superhydrophobic fabric can be used as a filter to separate oil from water.

Abstract(#br)Superhydrophobic electrospun nanofibrous membranes (ENMs) with a fully interconnected porous web structure and high void volume fraction have been proposed for membrane distillation (MD). This study describes a novel and facile design strategy for the fabrication of superhydrophobic and self-cleaning polysulfone-polydimethylsiloxane (PSU-PDMS) ENMs for direct contact membrane distillation (DCMD) via electrospinning PSU nanofibers followed by PDMS coating and cold-press post-treatment.

Abstract(#br)Grafting single end-tethered polymer chains on the surface of graphene is a conventional way to modify the surface properties of graphene oxide. However, grafting arc-like macromolecular bridges on graphene surfaces has been barely reported. Herein, a novel arc-like polydimethylsiloxane (PDMS) macromolecular bridges grafted graphene sheets (GO -g-Arc PDMS) was successfully synthesized via a confined interface reaction at 90 °C.

摘要( # br )耐久多功能织物的快速构建在过去的十年里仍然是一个挑战。本工作通过在棉纤维上原位生长沸石咪唑酸盐骨架- 8 ( ZIF- 8 )纳米晶，在室温条件下制备非氟超疏水抗菌棉织物表面，然后用聚二甲基硅氧烷( PDMS )包复。利用扫描电子显微镜( SEM )、能量色散X射线能谱( EDS )、X射线衍射分析( XRD )和X射线光电子能谱( XPS )对处理后织物的表面形貌和化学成分进行了表征。制备的棉织物具有超疏水性能，水接触角( WCA )为151.36°，滑动角为3.6°，对大肠杆菌和金黄色葡萄球菌具有优异的抗菌性能。通过反复的洗涤和磨损循环来评价超疏水抗菌织物的耐久性。所制备的织物经300次擦洗和5次洗涤后仍保持了其优异的抗菌性能和超疏水性能。超疏水和抗菌活性的鲁棒性使得该方法在未来生物医学领域具有广阔的应用前景。

AbstractTwo microporous organic frameworks based on adamantane (hereafter denoted as MF-Ads) were fabricated through Sonogashira-Hagihara coupling polycondensation of aryl halides and alkynes. Results show that both types of MF-Ad networks had similar porous properties and exhibited excellent CO2 uptake capacity (72.5 cm3 g−1) and CO2/N2 selectivity (59.1) at 273 K and 1.0 bar. Taking advantage of the superhydrophobic wettability of the resulting MF-Ad networks, wire mesh scaffolds were used to fabricate superhydrophobic films with polydimethylsiloxane (PDMS) acting as a binder.