Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 7
·3231-3241
·
IF 9.931
Fan-Ning Meng,Meng-Qian Zhang,Kai Ding,Ting Zhang,Yong-Kuan Gong
The fabrication of stable and highly antifouling membranes for the separation of various oil/water mixtures remains challenging. A facile and universal coating strategy is developed to modify the chemically inert PVDF separation membrane. The membrane is first coated with a nanolayer of mussel-inspired polydopamine (PDA) from dopamine solution to provide a reactive amino surface. The universally and strongly adhered PDA mediation layer (PVDF/PDA) is then covalently anchored with a mono-layer of a cell outer membrane mimetic and reactive random copolymer (PMEN) to confer excellent antifouling nature. The PMEN coated PVDF membrane (PVDF/PDA/PMEN) demonstrates better superhydrophilicity by changing the water contact angle to 0° in 5 s and stronger underwater superoleophobicity with an oil contact angle of ∼170°. More excitingly, the sliding angle of the underwater oil droplet on the membrane is as low as 0.5°. Furthermore, the PMEN coated membrane shows great advantages over other modifications by way of enhanced separation and excellent antifouling performances for both oil-in-water emulsions and adhesive high concentration crude oil/water mixtures. This facile and universal coating strategy for the fabrication of a stable and cell-membrane-mimetic antifouling membrane has great potential in efficient oil/water separation, even in the separation of adhering crude oil/water mixtures.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Mu Li,Lili Wu,Chaocan Zhang,Wanyu Chen,Cong Liu
Membrane technology has received wide attention as it plays an important role in water treatment process. However, membrane fouling results in a decrease in water permeation flux and separation effect, which lead to degraded membrane lifespan. A facile and novel strategy to form a multifunctional modified coating on the membrane surface by using the one-step assembly coating on the basis of tannin acid had been reported in this work. Tannin acid is a plant-derived polyphenolic substance that is hydrophilic and bactericidal. As a common nonionic polymer, polyvinylpyrrolidone (PVP) has a hydrophobic interaction and hydrogen bonding with TA and is beneficial to improve the hydrophilicity and antifouling performance of the substrate. However, the benefits of coating on the membrane have been limited due to the strong complexing ability of TA and PVP in aqueous solution. Herein, 50% N , N -dimethylformamide (DMF) aqueous solution were found that promoted the co-deposition of TA and PVP on the surface of the membrane. The catechol-rich polyphenol coating provides versatile properties on the membrane surface, including ultra-high pure water flux, high antifouling properties, recyclability, and a certain degree of antimicrobial performance. Moreover, the TA-PVP coating imparts a binding site for binding metal ions that allows it to capture metal ions through complexation and immobilization on the coating. The modified membranes showed more significant antifouling performance after iron ions have been complexed, and showed stronger bactericidal activity after silver ions have been complexed.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Qiang Yi,Wenqiang Zhang,Shaoqing Li,Xinyuan Li,Chunwen Sun
High-performance electrolytes and electrode materials play a critical role in advanced sodium-ion batteries with higher energy densities. In this work, we prepared a poly(methyl methacrylate)-filled composite electrolyte (named as GHSE) by in situ polymerization of methyl methacrylate in the porous Na3Zr2Si2PO12–polymer vinylidene fluoride–hexafluoropropylene composite membrane for the first time. The GHSE membrane exhibits a high ionic conductivity (2.78 × 10–3 S cm–1), wide electrochemical window (∼4.9 V), high Na+ ion transference number (∼0.63), good thermal stability and flexibility, as well as smaller interfacial resistance. Moreover, a composite Na/C anode was prepared, which shows good dendrite suppression ability. The full cell Na0.67Ni0.23Mg0.1Mn0.67O2 |GHSE|Na/C exhibits excellent rate capability with an initial discharge capacity of 96 mAh g–1 even at a higher current density of 192 mA g–1 and excellent cyclability for 600 cycles. These results suggest that the GHSE and Na/C anode are promising electrolyte and anode materials for Na-ion batteries, respectively.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jun-Heng Fu,Qigong Zhang,Minglei Yan,Wei Tang,Yun Zeng,Yuntao Cui,Mingkuan Zhang,Hongwei Deng,Hao Kang,Xinlong Sun,Liang Qiao,Hongzhang Wang,Yang Zhao
Passive radiative cooling which dissipates heat from surfaces by reflecting sunlight and emitting radiation towards outer space, has garnered growing attention as an eco-friendly cooling strategy with zero-energy consumption. However, few studies focus on low-cost and multifunctional composite film fabricated by a straightforward and environmentally friendly method that is crucial for their large-scale applications. Herein, we introduce a facile, efficient, and scalable approach to fabricate a hydrophobic and polymer-dielectric poly (vinylidene fluoride)-hexafluoropropylene (P(VDF-HFP)@PVA hydrogel Janus film (DPP), exhibiting exceptional radiative cooling and thermal management capabilities for diverse practical applications. With the introduction of ZnO, DPP showcases the optical capability with a solar reflectance of ≈93 % and an infrared emittance of ≈96 %, endowing it with remarkable radiative cooling performance. The synergistic integration of hydrogel phase change and radiation cooling capabilities offered by the P(VDF-HFP) layer enables the DPP to achieve a subambient cooling of 8.62 °C under direct sunlight. Moreover, when applied to the thermal management of electronic devices and fruit preservation due to the phase change property, the DPP effectively reduced surface temperatures by 10 °C and 15.5 °C respectively. Its simplicity and versatility suggest that it could be widely adopted for daytime passive radiation cooling, thereby expanding its practical applications across various fields.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 78
·63580-63587
·
IF 3.84
Xinzhen Zhao,Aiwen Qin,Dapeng Liu,Chunju He
The polyelectrolyte complex (PEC) layer fabricated by chitosan and sodium alginate was anchored on a membrane surface though plasma treatment and layer by layer self-assembly to improve the antifouling properties of the PVDF membrane. The interface properties of modified PVDF membranes were investigated and the results indicated the presence of the PEC layer was conducive to enhance the hydrophilicity and screening ability of the PVDF ultrafiltration membrane due to the hydrophilic crosslinking structure. Furthermore, the fouling resistance including anti-adsorption ability and dynamic antifouling ability for pollutant filtration of modified PVDF membranes were significantly improved due to the anchored PEC layer. For the CS–SA-3 membrane with an assembly number of 3, the adsorption mass of BSA on the membrane surface was only 4 μg cm−2 and the FRR-W values increased to 89%, 99% and 98% for the three typical pollutants of bovine serum albumin, sodium alginate and humic acid, respectively. It was demonstrated that the PEC layer could be used as an antifouling material to improve the antifouling ability of hydrophobic membranes though decreasing the reversible fouling. This article also aimed to provide a simple method to fabricate the antifouling interface.
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2015
·
IF 2.515
Yanhui Xiang,Yunze Wang,Haibo Lin,Yi Wang,Zhu Xiong,Fu Liu
ABSTRACT Efficient separation of both oil-in-water (O/W) and water-in-oil (W/O) micro-emulsion was accomplished by a novel thermally responsive PVDF membrane. PNIPAAm–PVP–VTES micro-hydrogel was elaborately synthesized and incorporated into PVDF membrane, which was validated by transmission election microscopy (TEM), dynamic light scattering (DLS), X-ray photoelectron spectroscopy (XPS), attenuated total reflection Fourier transformed infrared spectroscopy (FTIR-ATR), laser confocal microscopy and thermogravimetric respectively. The thermally responsive mechanism of the engineered PVDF membrane was proposed from aspects of molecule structure, micro-hydrogel, membrane topology and membrane performance. The permeability and separation efficiency for pure water, both O/W and W/O micro-emulsions were modulated by temperature. The engineered PVDF membrane exhibited superantiwetting, outstanding permeability, high separation efficiency (> 99.90%), excellent antifouling property and reliability for long-term application. Moreover, multistage separation of oil-in-water micro-emulsion was achieved at nano-scale. Dispersed micro-emulsion droplets bigger than 20 nm and 40 nm were completely removed by manipulating the temperature below and above LCST , respectively. The engineered PVDF membrane highlights its great potential in micro-emulsion separation.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 102
·100079-100089
·
IF 3.289
Kaiyue Zhang,Zijian Cui,Guangyu Xing,Yaqing Feng,Shuxian Meng
Dye-sensitized solar cells (DSSCs) fabricated with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) composite gel electrolytes containing variable amounts of modified kaolin were studied in this work. The kaolin was modified with silane coupling agent γ-aminopropyltriethoxysilane (KH550), and the modified kaolin (M-KL) was characterized by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The results of X-ray diffraction (XRD) and differential scanning calorimetry (DSC) indicated that the crystallinity of polymer membranes decreased with the addition of M-KL nanoparticles. The ionic conductivity and diffusion coefficient (I3−) of polymer gel electrolytes (PGEs) reached optimum values of 9.452 × 10−3 S cm−1 and 10.37 × 10−6 cm2 s−1 for 3 wt% M-KL, respectively, which contributed to higher short-circuit current density (Jsc) and photoelectric conversion efficiency (η) of the corresponding DSSCs. The optimum level of η reached 7.48% under the illumination of 100 mW cm−2, an increase of 16.3% compared with the DSSC without M-KL.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Haiye Wang,Xinzhen Zhao,Chunju He
The polydimethylsiloxane modified silica (SiO 2 -g-PDMS) nanoparticles with hydrophilic core and hydrophobic shell are employed for the hybridization modification of PVDF ultrafiltration membrane to improve the separation and antifouling performances. The results suggest the modified SiO 2 -g-PDMS nanoparticles exhibit improved dispersion and significant amphiphilic characteristics, and the wetting properties of membrane surface and mimetic matrix of hybrid PVDF membranes are distinctly different with the contact angle values at 105° and 15°, respectively. In addition, the added SiO 2 -g-PDMS nanoparticles significantly improve the fouling repulsion and fouling release properties of hybrid PVDF membranes, the anti-adsorption ability and water flux recovery ratio (FRR-W) of hybrid PVDF membranes to the two typical pollutants of bovine serum albumin (BSA) and humic acid (HA) have been significantly improved. This article aims to provide a simple way to improve the antifouling performance of PVDF ultrafiltration membrane with dual-mode multi-functional modifier.
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2017
·
IF 2.589
Zhanjian Liu,Huaiyuan Wang,Xiguang Zhang,Chongjiang Lv,Zhiqiang Zhao,Chijia Wang
A durable and self-healing superhydrophobic polyvinylidene fluoride (PVDF)/polyester-modified silicone resin (PMSR)/microspheric Na 2 CO 3 @SiO 2 coating with WCA of 158 ± 1.5° and low SA of 4 ± 0.5° has been successfully prepared via sol-gel and spraying technique. After 24 h hydrolysis of tetraethylorthosilicate (TEOS), microspheric Na 2 CO 3 @SiO 2 particles with extremely large storage spaces were obtained as reservoirs for the healing agent of POTS. The superhydrophobicity of the prepared coating can be recovered after 10 rubbing/healing test cycles, indicating the excellent self-healing ability. Simultaneously, the prepared coating also possesses gas compensation capability in acidic condition, which can extend superhydrophobic duration by 400%. The gas compensation capability can be mainly attributed to the bubbles generated from the reaction between acid and porous Na 2 CO 3 , hindering water wetting the surface. Moreover, the prepared coating can withstand 4217 friction cycles without obvious surface damage, which is approximately 6 times higher than that of pure PVDF coating. This is mainly due to the combined action of the high adhesion of PMSR, the self-lubrication of PVDF and the surface hierarchical nano/micro wrinkles. The prepared coating also shows prominent superhydrophobic stability under the conditions of acid/alkaline solution (pH = 1–14) or strong UV exposure (14 days). It is believed that this durable and self-healing superhydrophobic coating is anticipated to open a new avenue to enlarge the application range of superhydrophobic coatings.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 114
·113267-113274
·
IF 3.289
Xinzhen Zhao,Changkun Liu
A new kind of hydrophilic polyvinylidene fluoride (PVDF) microfiltration membrane with an auto-soak surface was fabricated by plasma treatment and interfacial crosslinking to improve the separation efficiency and fouling resistance in water treatment. Based on the anchored hydrophilic polyvinyl alcohol (PVA) network and the porous structure, the modified PVDF membrane was able to exhibit an auto-soak ability. The separation test results showed that to obtain the same separation efficiency, the operating pressure of the modified PVDF membranes was significantly reduced as compared with that of the neat PVDF membrane, due to the decreased permeation resistance. The fouling test results also demonstrated that this auto-soak surface of the PVDF membrane was able to alleviate the irreversible fouling problem during dynamic filtration, and the water flux recovery ratio (FRR) remained above 75% even after three fouling cycles. All these results indicated that the modified PVDF membrane with the auto-soak surface provided a new means for the reduction of the permeation resistance, as well as the membrane fouling problem of the hydrophobic porous membranes.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Heng Shi,Yi He,Yang Pan,Haihui Di,Guangyong Zeng,Lei Zhang,Chunli Zhang
Binding nanoparticles on complex structured materials surface is an important issue for nanotechnology, such as obtain an superwetting surface. To fabricate a highly nanoparticles decorated polymer membrane with superior surface wettability , a facile and environmentally method stills remains challenge. Taken advantage from the mussel-inspired method, we reported here that the TiO 2 nanoparticles were directly anchored on the surface of poly(vinylidene fluoride) (PVDF) membrane, making the intrinsic hydrophobic polymer membrane become hydrophilic, what's more, the mussel inspired method was modified by introducing a silane coupling agent KH550, the ability to bind nanoparticles was retained and the as-prepared membrane turn from a common hydrophilic state to superhydrophilic state. Besides, the as-prepared superhydrophilic PVDF membrane could be applied on the separation of various kinds of surfactant stabilized oil-in-water emulsion with an ultrahigh efficiency nearly 99% and also shows durable oil resistance and antifouling performance, thus make the membrane easily to recycle. In addition, due to the universality of dopamine, this surface modification method should also be applicable on other organic–inorganic hybrid materials.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 13
·10365-10371
·
IF 3.289
Lei Peng,Wenkang Lei,Ping Yu,Yunbai Luo
The separation of water and oil is a promising work due to the increasing worldwide oil pollution and leakage of chemical solvents. Superhydrophobic porous materials were prepared for their separation. In this work, various porous substrates of copper meshes, filter papers and polyurethane (PU) sponges were chosen to obtain superhydrophobic surfaces. Superhydrophobic surfaces were fabricated by polyvinylidene fluoride (PVDF) and hydrophobic nano-silica particle coatings through a spraying approach. The superhydrophobicity, stability of coatings and oil/water separation effect of these as-coated materials were studied. The results demonstrated that all the surfaces showed high water contact angles (>150°), good reusability and excellent oil selectively. Moreover, the coated filter paper was scaled up for practical use of removing trace water from mineral insulating oil in our group. It is promising that this superhydrophobic coating could be used in more applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）