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Self-Healable Gels for Use in Wearable Devices
yang自愈合凝胶用于可穿戴设备
Wettability of Reentrant Surfaces: A Global Energy Approach
yang可重入表面的润湿性:整体能量法
M2(m-dobdc) (M = Mn, Fe, Co, Ni) Metal–Organic Frameworks as Highly Selective, High-Capacity Adsorbents for Olefin/Paraffin Separations
yang金属-有机骨架作为高选择性、高容量烯烃/石蜡分离吸附剂
Bimetallic metal-organic frameworks nanocages as multi-functional fillers for water-selective membranes
yang双金属有机骨架笼多功能填料的水选择性膜
Source:Journal of Membrane Science, Volume 545
Author(s): Xuanxuan Cheng, Zhongyi Jiang, Xiaopo Cheng, Song Guo, Lei Tang, Hao Yang, Hong Wu, Fusheng Pan, Peng Zhang, Xingzhong Cao, Baoyi Wang
Although metal-organic frameworks (MOFs) with well-defined regular and porous structure have emerged as a family of nanoporous building blocks, the great potential of MOFs as multi-functional fillers for hybrid membranes deserves in-depth exploitation. In this study, bimetallic MOF nanocages, FeIII-HMOF-5, were prepared and incorporated into sodium alginate (SA) matrix to fabricate water-selective nanohybrid membranes. Introduction of FeIII ions into MOF-5 creates more coordinatively unsaturated sites, which leads to preferential dissolution of water molecules over ethanol molecules, thus elevating the solubility selectivity. The hollow structure of FeIII-HMOF-5 ensures the free diffusion of water molecules. The synergistic regulation of chemical composition and physical structure of MOFs endows the hybrid membranes with remarkably elevated separation factor and permeation flux. Taking dehydration of 90wt% ethanol aqueous solution as model system, the hybrid membrane containing FeIII-HMOF-5 exhibits the highest separation performance with separation factor of 3423 and permeation flux of 1540g/m2 h, much higher than those for pure SA membrane and the hybrid membranes incorporating hollow MOF-5 (HMOF-5) and MOF-5. Moreover, the hybrid membranes containing FeIII-HMOF-5 display remarkably superior physicochemical stabilities and long-term operation stability. This study demonstrates a promising prospect of heterometallic hollow MOFs as multi-functional fillers in high-performance hybrid membranes.
Graphical abstract

Selective extraction of vanadium(V) from sulfate solutions into a polymer inclusion membrane composed of poly(vinylidenefluoride-co-hexafluoropropylene) and Cyphos® IL 101
yang钒高效萃取
Source:Journal of Membrane Science, Volume 545
Author(s): Mohammad Reza Yaftian, M. Inês G.S. Almeida, Robert W. Cattrall, Spas D. Kolev
A poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP)-based PIM containing trihexyltetradecylphosphonium chloride (Cyphos® IL 101) as its carrier was developed for the selective extraction of V(V) from sulfate solutions. Various plasticizers/modifiers were tested and best results in terms of rate of extraction and amount extracted were obtained with 2-nitrophenyloctyl ether (NPOE). The optimal PIM composition, with respect to the same criteria was determined to be 35wt% Cyphos® IL 101, 55wt% PVDF-HFP and 10wt% NPOE. Back-extraction of V(V) was achieved using 6molL−1 H2SO4. An anion exchange mechanism is proposed for the extraction of V(V) involving the formation of the complex anion VO2SO4 -. The selectivity of the PIM towards V(V) was tested in the presence of Mo(VI), Al(III), Co(II), Cu(II), Fe(III), Mn(II), and Ni(II). Only Mo(VI) was co-extracted with V(V) at pH 2.3. The Mo(VI) interference was eliminated by a two-step separation procedure in which Mo(VI) was extracted at pH 1.1 which was followed by the selective extraction of V(V) at pH 2.3. The PIM was found to be stable over five extraction/back-extraction cycles.
Depolymerization of poly(bisphenol A carbonate) under mild conditions by solvent-free alcoholysis catalyzed by 1,8-diazabicyclo[5.4.0]undec-7-ene as a recyclable organocatalyst: a route to chemical recycling of waste polycarbonate
yang双酚A碳酸酯降解 由DBU催化 温和条件下
DOI: 10.1039/C7GC02063E, Paper
DBU promotes quantitative PC alcoholysis selectively under mild solventless conditions: the process is relevant to the valorization of the waste polymer.
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Highly Porous Poly(high internal phase emulsion) Membranes with “Open-Cell” Structure and CO2-Switchable Wettability Used for Controlled Oil/Water Separation
yang油水分离新思路及方法
Sorption of Fluorotelomer Sulfonates, Fluorotelomer Sulfonamido Betaines, and a Fluorotelomer Sulfonamido Amine in National Foam Aqueous Film-Forming Foam to Soil
yang土壤处理技术
Atmospheric pressure plasma - ARGET ATRP modification of poly(ether sulfone) membranes: A combination attack
yang纳滤膜表面枝接技术
Source:Journal of Membrane Science, Volume 546
Author(s): John J. Keating, Mirco Sorci, Istvan Kocsis, Angelo Setaro, Mihail Barboiu, Patrick Underhill, Georges Belfort
A novel surface modification technique for grafting alkyl methacrylate monomers from commercial poly(ether sulfone) (PES) nanofiltration membranes is developed through a combination of helium and oxygen atmospheric pressure plasma treatment followed by Activators Regenerated by Electron Transfer (ARGET) Atom Transfer Radical Polymerization (ATRP). The resulting membrane surfaces show degree of grafting increases of 28%, 94%, and 270% for methyl methacrylate (C1), hexyl methacrylate (C6), and stearyl methacrylate (C18), respectively, when characterized with Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy. Scanning Electron Microscopy and Atomic Force Microscopy (AFM) show a rippled, fibrous morphology for the PES membranes grafted with C18 and reinforced through molecular dynamics simulations. AFM of the PES membranes grafted with C18 show an increase of ~ 23% in root-mean square (RMS) roughness as well as 4x higher adhesion force when probed with a hydrophobic gold cantilever tip when compared with the unmodified PES membranes, confirming a successful surface grafting reaction and increase in surface hydrophobicity, respectively. This technique allows enhanced synthesis of polymer grafted membranes using relatively green reaction solvent and enables “structure-by-design” surface morphology control with future applications in membrane separation processes such as organic solvent nanofiltration, gas separations, and desalination.
Graphical abstract

Fabrication of nanoporous polymeric crystalline TiO2 composite for photocatalytic degradation of aqueous organic pollutants under visible light irradiation
yang水处理:可见光照射下纳米多孔聚合物TiO2复合光催化降解水中有机污染物
A nanoporous polymeric crystalline TiO2 composite (TiO2/PDVB-MA) has been successfully synthesized through an in situ synthesis method using divinylbenzene (DVB), methacrylic acid (MA) and tetrabutyl titanate. The experimental results showed that TiO2 nanoparticles composed of the mixture phases of anatase and rutile were homogeneously dispersed into the PDVB-MA support. The TiO2/PDVB-MA composite was used as photocatalyst for Rhodamine B (RhB), bisphenol A and 2,4,6-trichlorophenol degradation under visible light irradiation. More interestingly, the excellent photocatalytic performance of the composite was observed with regard to RhB and bisphenol A, which might be ascribed to the synergistic effect between TiO2 nanoparticles and PDVB-MA. Moreover, TiO2/PDVB-MA composite could be recycled at least four times in the removal of RhB, suggesting that it is a promising photocatalyst to catalyze the degradation of organic pollutants under visible light irradiation.
A nanoporous polymeric crystalline TiO2 composite (TiO2/PDVB-MA) has been successfully synthesized through an in situ synthesis method using divinylbenzene, methacrylic acid and tetrabutyl titanate. The TiO2/PDVB-MA composite possesses excellent adsorptive performance and photocatalytic activity for organic pollutants degradation under visible light irradiation. This phenomenon is attributed to the rich porous structure of PDVB-MA support and the synergistic effect between TiO2 nanoparticles and support.
Cellulose membranes for organic solvent nanofiltration
yang用于有机溶剂纳滤的纤维素膜
Source:Journal of Membrane Science, Volume 545
Author(s): F.M. Sukma, P.Z. Çulfaz-Emecen
Cellulose membranes were fabricated by phase inversion from solutions of cellulose in 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) as solvent and acetone as volatile cosolvent. The rejection of Bromothymol Blue (624Da) in ethanol increased and the permeance decreased by increasing the cellulose concentration in the solution prior to coagulation, either by having more cellulose in the starting solution or by evaporating the volatile cosolvent. Drying the membranes after coagulation further increased the dye rejection while decreased the permeance by an order of magnitude. The highest Bromothymol Blue rejection obtained was 94.0% accompanied by a permeance of 0.3L/h.m2bar with the membrane fabricated from a 20% cellulose - 80% [EMIM]OAc solution and dried after coagulation. The membrane fabricated from a 12% cellulose - 63% [EMIM]OAc - 20% acetone solution and subjected to pre-evaporation before coagulation had 69.8% Bromothymol Blue rejection, with a permeance of 8.4L/h.m2bar. Overall, the membranes' separation performance was comparable to OSN membranes reported in literature. The rejection for dyes of different charge and polarity was observed to be strongly dependent on solute-membrane interactions, Crystal Violet that did not sorb at all in the membrane was rejected while Brilliant Blue R, which sorbed to a large extent was not. The affinity of dyes to the membrane was attributed to both electrostatic and hydrogen bonding interactions.
Graphical abstract

Intensified ethyl levulinate production from cellulose using a combination of low loading H2SO4 and Al(OTf)3
yang用纤维素合成乙酰丙酸乙酯(食用香料)
Source:Catalysis Communications, Volume 103
Author(s): Jun Dai, Lincai Peng, Hui Li
Mixed-acid system consisting of Brønsted and Lewis acids as an innovative strategy for directly converting cellulose in ethanol medium was conducted to improve the production of ethyl levulinate (EL). A combination of low loading H2SO4 (0.01mol/L) and Al(OTf)3 (0.002mol/L) was found to be an efficient catalyst system for this reaction, affording an optimum EL yield of 64.9% at 180°C for 3h. A possible synergistic catalytic mechanism was proposed based on the reactivity of various carbohydrates. The developed mixed-acid catalyst system was further extended to the direct transformation of real cellulosic biomasses for the synthesis of EL.
Graphical abstract

Chemical cleaning of ultrafiltration membranes for polymer-flooding wastewater treatment: Efficiency and molecular mechanisms
yang超滤膜处理聚合物驱废水的化学清洗效率及分子机理
Source:Journal of Membrane Science, Volume 545
Author(s): Guicai Liu, Lei Li, Liping Qiu, Shuili Yu, Ping Liu, Youbing Zhu, Jun Hu, Zhiyuan Liu, Dongsheng Zhao, Haijun Yang
In a polymer-flooding wastewater treatment process, physically irreversible fouling of ultrafiltration (UF) membranes is severe and inevitable. Particularly, anionic polyacrylamide (APAM) aggravated flux loss is a challenge in flux recovery. Chemical cleaning procedures for polyvinylidene fluoride (PVDF) UF membranes fouled by polymers (e.g., APAM) were designed by investigating their cleaning efficiency, synergistic effect and molecular interactions based on the molecular mechanisms of polymeric fouling. The cleaning efficiency and foulant–foulant intermolecular interactions indicated that the destruction of the hydrogen-bonded network, egg-box shaped gel network, and interpenetrating polymer network using sodium hypochlorite (NaClO), ethylenediaminetetraacetic acid (EDTA) and dodecyl trimethyl ammonium chloride (DTAC) solutions, respectively, led to significant flux recovery. The synergistic relationships between the two types of cleaning reagents were different in the mixed solutions and sequential procedures. In addition, oil emulsions facilitated the removal of APAM and slowed the flux loss. Finally, the flux recoveries and operational aspects in the pilot-scale UF experiments indicated that integration of the tested chemical cleaning procedures can efficiently remove membrane foulants and significantly restore membrane flux during polymer-flooding wastewater treatment of UF processes. These results are promising for controlling membrane fouling due to polymeric foulants.
Graphical abstract

Nanostructured Wood Hybrids for Fire-Retardancy Prepared by Clay Impregnation into the Cell Wall
yang粘土浸渍在细胞壁中制备阻燃性纳米结构木材杂化材料
Nanocontainer-Enhanced Self-Healing for Corrosion-Resistant Ni Coating on Mg Alloy
Dewatering Oil Sands Tailings with Degradable Polymer Flocculants
yang可降解高分子絮凝剂对油砂尾矿的脱水作用
Biogenic Calcium Carbonate with Hierarchical Organic–Inorganic Composite Structure Enhancing the Removal of Pb(II) from Wastewater
yang废水中除铅
Superlyophilic Interfaces and Their Applications
yang亲液界面及其应用
Abstract
Superlyophilic interfaces denote interfaces displaying strong affinity to diverse liquids, including superhydrophilic, superoleophilic, and superamphiphilic interfaces. When coming in contact with these interfaces, water or oil droplets tend to spread completely with contact angles close to 0°, presenting versatile applications including self-cleaning, antifogging, controllable liquid transport, liquid separation, and so forth. Inspired by nature, scientists have developed various kinds of artificial superlyophilic (SLPL) interfaces in the past decades. In terms of dimensional characteristics, the artificial SLPL interfaces can be divided into four categories: i) 0D particles, whose dispersibility or catalytic performance can be notably enhanced by superlyophilicity; ii) 1D micro-/nanofibers or nanotubes/channels, which can efficiently transfer liquids with SLPL interfaces; iii) 2D flat SLPL interfaces, on which different functional molecules can be deposited uniformly, forming ultrathin and smooth films; and iv) 3D structures, which can be obtained by either constructing 0D, 1D, or 2D SLPL materials separately or directly fabricating random SLPL frameworks, and can always be used as functional coatings or bulk materials. Here, natural and artificial SLPL interfaces are briefly introduced, followed by a short discussion of the limit between lyophilicity and lyophobicity, and then a snapshot of methods to generate SLPL interfaces is given. Specific focus is placed on recent achievements of constructing SLPL interfaces from zero to three dimensions. Following that, broad applications of SLPL interfaces in commercial areas will be introduced. Finally, a short summary and outlook for future challenges in this field is presented.
Recent progress regarding superlyophilic interfaces with different dimensions is reviewed, including 0D particles, 1D fibers or tubes, 2D flat interfaces, and 3D materials. Moreover, the broad applications of superlyophilic interfaces are described, spanning from conductivity enhancement and self-cleaning, liquid transport, and antifogging, to printing and liquid separation, heat transfer, and film fabrication.
Poly(ethylene oxide)-block-poly(methyl methacrylate) diblock copolymers as functional additive for poly(vinylidene fluoride) ultrafiltration membranes with tailored separation performance
yang亲水超滤膜
Source:Journal of Membrane Science, Volume 545
Author(s): Jens Meyer, Mathias Ulbricht
In this work, poly(ethylene oxide)-block-poly(methyl methacrylate) (PEO-b-PMMA) diblock copolymers were established as functional additive for polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes, originally with the intention to increase their hydrophilicity and thereby decrease fouling. Additionally, however, it was found that copolymer micelles can be induced by complexing the PEO block of PEO-b-PMMA with specific metal salts. The formation of micelles as function of specific solution compositions was observed in dynamic light scattering and rheology experiments; the formation of PEO-metal ion complexes was shown via proton nuclear magnetic resonance (1H NMR) spectroscopy. Integration of micelle-forming compositions into typical PVDF-based casting solutions for UF membranes could lead to a higher surface porosity and a more regular barrier pore structure through microphase separation during the nonsolvent induced phase separation process used for membrane preparation. It was found that membranes containing small amounts of PEO-b-PMMA show a significantly higher permeance than membranes made from an otherwise equal casting solution without the copolymer, while maintaining the solute rejection properties. By using different types and amounts of metal salts to complex the PEO block it was possible to tailor the molecular weight cut-off of the membranes between 30kDa and 110kDa. Fouling studies in lab-scale cross-flow filtration cells showed an increased relative flux recovery compared to membranes without the functional copolymer additive. The results of this study are relevant because small fractions of a tailored diblock copolymer and metal salt as additives allow tailoring the barrier and separation properties at significantly higher overall performance within an otherwise unchanged membrane manufacturing process.
Controlling the Nanocontact Nature and the Mechanical Properties of a Silica Nanoparticle Assembly
yang控制接触自然和二氧化硅纳米颗粒组装的机械性能
Deep Eutectic Solvent Functionalized Graphene Composite as an Extremely High Potency Flame Retardant
yang高功能氧化石墨烯 阻燃剂
Separation and antifouling properties of hydrolyzed PAN hybrid membranes prepared via in-situ sol-gel SiO2 nanoparticles growth
yang分离和抗污性能 膜
Source:Journal of Membrane Science, Volume 545
Author(s): Yutao Hu, Zhenhua Lü, Chao Wei, Sanchuan Yu, Meihong Liu, Congjie Gao
In this work, a novel approach of hydrolysis followed by in-situ sol-gel of tetraethyl orthosilicate (TEOS) was developed to modify the polyacrylonitrile (PAN) porous membrane prepared via non-solvent induced phase separation technique for improved separation and antifouling properties. PAN/SiO2 hybrid membranes prepared using different contents of TEOS were characterized through ATR-FTIR, XPS, SEM, EDS, water contact angle measurement, cross-flow permeation test, static protein adsorption test and dynamic cross-flow protein fouling experiment. It was found that the sol-gel of TEOS took placed both on membrane surface and within membrane pore and the generated SiO2 particles affected both membrane surface and permeation properties through the roles of surface deposition and pore-filling, respectively. The in-situ sol-gel of TEOS could efficiently improve membrane separation property through tuning pore size and narrowing pore size distribution. Compared with the base and hydrolyzed PAN membranes of same water permeability, the PAN/SiO2 hybrid membrane exhibited a much lower molecular weight cut-off and thus enhanced rejection performance. Furthermore, both static protein adsorption and dynamic cross-flow fouling experiments with bovine serum albumin aqueous solution demonstrated that the surface deposition of SiO2 could appreciably improve membrane antifouling property through making membrane surface more hydrophilic, negatively charged and enriched with hydroxyl groups.
A novel ionically cross-linked sulfonated polyphenylsulfone (sPPSU) membrane for organic solvent nanofiltration (OSN)
yang有机溶剂纳滤膜
Source:Journal of Membrane Science, Volume 545
Author(s): Akbar Asadi Tashvigh, Lin Luo, Tai-Shung Chung, Martin Weber, Christian Maletzko
This paper describes the formation of a new generation of organic solvent nanofiltration (OSN) membranes via one-step in-situ crosslinking method by casting a solution mixture of sulfonated polyphenylsulfone (sPPSU) and hyperbranched polyethylenimine (HPEI) through a non-solvent induced phase inversion process. Ionically cross-linking reactions took place between sPPSU and HPEI, and were confirmed by FTIR and XPS. The as-fabricated membranes showed good chemical stability in ethanol and isopropanol, and were evaluated in terms of pure ethanol permeability and rejection ability of different dyes with molecular weights ranging from 320 to 1017g/mole in ethanol. The effects of HPEI concentration in dope solutions on OSN performance were firstly investigated, it was found that 0.3wt% HPEI gave the highest permeance (7.96Lm−2 h−1 bar−1) and a rejection of 51% to Rose Bengal (Mw = 1017). To further improve the OSN performance, several post treatments including dip coating and pressure assisted coating were conducted using a 1.0wt% HPEI solution in either water or ethanol. The coating under pressure showed the most effectiveness to enhance the crosslinking reaction and narrow the molecular weight cut off (MWCO). The resultant membrane had a MWCO of ≈ 600g/mole, a rejection of 99.9% to Rose Bengal and an ethanol permeance of 1.47Lm−2 h−1 bar−1. Compared to the un-modified sPPSU, all ionically cross-linked membranes possess much more stable rejections and permeance over a period of two weeks, especially for the membrane with the pressure assisted coating. These ionically cross-linked membranes may open up new strategies to design high performance OSN membranes due to the facile in-situ cross-linking method.
Graphical abstract

Enhanced Coalescence-Induced Droplet-Jumping on Nanostructured Superhydrophobic Surfaces in the Absence of Microstructures
yang超疏水结构
Robust and Self-Healable Bulk-Superhydrophobic Polymeric Coating
yangRobust and Self-Healable Bulk-Superhydrophobic Polymeric Coating
结实耐用自愈超疏水材料
Rational Design and Strain Engineering of Nanoporous Boron Nitride Nanosheet Membranes for Water Desalination
yang六方氮化硼(h-BN)在海水淡化的潜在应用
Preparation of Ice-Templated MOF–Polymer Composite Monoliths and Their Application for Wastewater Treatment with High Capacity and Easy Recycling
yang冰模板MOF–聚合物复合块材的制备
Substrate-Versatile Approach to Robust Antireflective and Superhydrophobic Coatings with Excellent Self-Cleaning Property in Varied Environments
yang制备抗反射超疏水自清洁涂料,简易方法
Light-Triggered CO2 Breathing Foam via Nonsurfactant High Internal Phase Emulsion
yang二氧化碳选择吸收
Hierarchically Structured Graphene Coupled Microporous Organic Polymers for Superior CO2 Capture
yang分层结构的石墨烯偶联微孔有机聚合物,用于优异的二氧化碳捕获
















