【摘 要】
：
Water flux and hydrophobic durability play important roles in membrane distillation(MD)applications.Compared with the method of adsorbing nanoparticles by electro-static adsorption,the surface roughness constructed by chemical bonding is more conducive to
【机 构】
：
State Key Laboratory of Urban Water Resource and Environment(SKLUWRE),School of Environment,Harbin I
论文部分内容阅读
Water flux and hydrophobic durability play important roles in membrane distillation(MD)applications.Compared with the method of adsorbing nanoparticles by electro-static adsorption,the surface roughness constructed by chemical bonding is more conducive to the performance of membrane.This paper reports a facile approach to fabricating superhydrophobic fluoroalkyl silane/polydimethylsiloxane@FeOOH@stabilized polyac-rylonitrile(FAS/PDMS@FeOOH@SPAN)nanofibrous membrane(NFM)with outstanding hierarchical structures,aiming to achieve efficient and stable performance in MD.Electrospun polyacryloni-trile(PAN)membrane after peroxidation was chosen as the base membrane,followed by in-situ synthesis of iron oxyhydroxide and liquid-phase silanization.We tested the characteristics of FAS/PDMS@FeOOH@SPAN NFM in each preparation stage and its performance in direct contact membrane distillation(DCMD).The chemical bond between iron oxyhydroxide and the membrane is stronger,making the rough structure steady and dense.The FAS/PDMS@FeOOH@SPAN NFM exhibited a water contact angle of 155.4° and excellent hydrophobicity towards different pollutants.Besides,it showed satisfied properties with a water flux of 24.7 L·m-2·h-1,a high salts rejection of ca.100％and an extended-term stability in DCMD using hypersaline water(10％,mass ratio).It is be-lieved that this novel study proposes a universal and efficient method to fabricate a superhydrophobic surface and has great po-tential for high-salinity wastewater treatment in MD.
其他文献
Antibacterial wound dressing can benefit the wound healing by preventing bacterial infection,especially for the electro-spun ones due to their porous structures and easily loading antibacterial drugs.However,it is challenging to apply the antibac-terial e
To reduce the cost of manufacture,it is urgent to develop effi-cient and stable platinum(Pt)-free counter electrode(CEs)electrocatalysts for dye-sensitized solar cells(DSSCs).In this study,a simple electrospinning and carbonization strategy has been devel
The research of photo-responsive materials,with changed ab-sorption and emission under light stimulus,has drawn more and more attention due to their wide applications.However,most of them suffered from the notorious aggregation-caused quenching(ACQ)effect
Low water vapor and air permeability is a persistent challengein wearable and on-skin electronics,as it reduces wearing comfort,and leads to skin irritation and inflammation in the long term.To tackle this issue,Zheng and coworkers designed a stretchable
Micro-size oil adsorbents are effective for the rapid reme-diation of special oil spills.Here,N-doped reduced gra-phene oxide(RGO)microspheres(ca.150 μm in diameter)with a local radially aligned and porous structure are fabricated by combining electrospra
In view of the current living micro-environment and requirements of green economy,intelligent light-responsive humidification materials have become a hot spot in intelligent polymer mate-rials.In this work,reversible photoresponsive films with a mechani-c
Janus membrane with opposite wettability on its two sides has witnessed an explosion of interest in the field of liquid sponta-neous and directional transport for their promising prospect.The advances in fabrication technology and natural bionics have bro
Transdermal drug delivery system(TDDS)facilitates the con-trolled release of active ingredients penetrating through the skin,avoiding the liver first pass effect.Electrospinning is a simple process to fabricate ultrafine fibers with a higher specific sur-
Convenient and integration fabrication process is a key issue for the application of functional nanofibers.A surface func-tionalization method was developed based on coaxial elec-trospinning to produce ultraviolet(UV)protection nanofibers.The titanium dio
Lead ion(Pb2+)is one of the most hazardous heavy metal ions in aquatic environments.Carbon materials and manganese dio-xide(MnO2)have been shown to be prospective adsorbents to cope with the lead pollution.In this study,a novel hollow carbon@MnO2 composit