FIBERS AND POLYMERS
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2021
·Vol. 22
·期 12
·3261-3270
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IF 2.153
Liu Kainan,Cao Liqin
Nylon mesh has been applied in various fields because of its intrinsic mechanical and chemical stability. However, its application is limited by its surface property. In this work, nylon mesh was first designed to integrate with a zeolitic imidazolate framework-67 (ZIF-67) with a distinct hydrophobic property. Herein, the mechanically stable nylon mesh/carboxymethyl chitosan/ZIF-67 (NY/CMCS/ZIF-67) composite membranes were prepared via layer-by-layer self-assembly of CMCS surface functional groups to coordinate with cobalt ion and in situ growth of ZIF-67. The prepared NY/CMCS/ZIF-67 membranes were characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. After modifications, the ZIF-67 content in the membranes reached 22 %. The water contact angle increased from 47.5 ° for nylon mesh to 128.8 ° for NY/CMCS/ZIF-67. The NY/CMCS/ZIF-67 composite membranes exhibited good oil-water emulsion separation property and oil absorption ability. After 15 oil absorption-drying cycle experiments, the oil absorption ability of the membrane was still greater than 95 %, and the oil absorption rate was 6.8 g/g. The modified nylon mesh could still be used for dye removal, the adsorption capacity of the membrane increased by 50 % compared with that of NY/CMCS, and the adsorption processes followed the pseudo-second-order model. Thus, this research provides new insights into the preparation of efficient modified nylon film with great application potential for filtration and separation in complex environments.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Hong Shi,Tiantian Wang,Long Zhao,Weihua Zhu
ABSTRACT With the aggravation of environmental pollution caused by oil and chemical leakages, oil-water separation has attracted great attention from both academia and industry. In this paper, a costeffective dip-coating and thermal treatment method based on the modification of nylon mesh has been developed for oil-water separation. Ultra-low surface energy polybenzoxazine and hydrophobic silica nanoparticles were adopted to engineer nylon mesh superhydrophobic-superoleophilic. The morphology, chemical composition and surface properties of the modified nylon mesh were characterized by using scanning electron microscopy, Fourier-transform infrared spectroscopy and contact angle (CA) measurements, etc. The modified nylon mesh exhibited excellent superhydrophobic property with a high water contact angle of 154.3° and distinct superoleophilic feature with a negligible oil CA of nearly 0°, leading to more than 99.5% ± 0.1% of oil-water separation efficiency with high permeate flux (up to 1.77 × 10 4 ± 100 L/(m 2 h)) merely under gravity. In addition, the novel nylon mesh displayed excellent reusability after more than 30-cycle measurements. Our findings may provide a promising approach to the treatment of oil spills and oily wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Lide Yang,Jiacheng Liang,Zheng Liu,Jianmin Yuan,Guowen He
The exploitation, transportation, and utilization of various oil products frequently generate substantial volumes of oily wastewater, making the development of efficient treatment methods imperative for addressing environmental pollution and water scarcity. In this study, sodium hypochlorite was first employed to oxidize and etch the surface of the nylon mesh separation membrane (NFM), resulting in a modified NFM (M-NFM) characterized by a unique honeycomb-like porous structure and an abundance of oxygen-containing functional groups. Subsequently, a hydrophilic and positively charged UiO-66-NH 2 particle layer is in situ synthesized on the NFM surface, capitalizing on the abundant nucleation sites offered by carboxyl groups within the honeycomb framework, yielding the composite membrane of M-NFM/UiO-66-NH 2 (M-NFMU). To further enhance the oil–water separation performance of this composite membrane, surface-functionalized cellulose nanocrystals (SF-CNC) and graphene oxide (GO) were sequentially adsorbed onto the surface of the M-NFMU membrane through a synergetic self-assembly strategy. This process led to the formation of a hierarchical micro-nano structure on the surface of the NFM, ultimately producing a composite membrane designated as M-NFM@UiO-66-NH 2 /SF-CNC/GO (M-NFMUCG). During the oil–water separation process, water molecules engage in hydrogen-bonding interactions with the amine, carboxyl, and hydroxyl functional groups present in the UiO-66-NH 2 , SF-CNC, and GO structures. This interaction effectively captures and stabilizes a water film on the surface of the M-NFMUCG membrane, preventing oil from coming into contact with it. As a result, the M-NFMUCG exhibits remarkable superhydrophilicity, exceptional oil resistance, and outstanding oil–water separation performance, achieving a permeate flux of up to 16,361 L m 2 h −1 and an oil rejection rate exceeding 99.9% under gravity. Moreover, the M-NFMUCG membranes exhibit excellent chemical stability and remarkable salt resistance, underscoring their significant potential for the treatment of oily wastewater.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2024
·
IF 2.2
Song Jiangxiao,Gao Zongchun,Jiang Ziqing,Zhang Yan,Zheng Guangyong,Yu Yihao,Qi Dongming,Wang Jianming,Zhai Shimin
EMI shielding films are increasingly in demand for wireless networks, wearable electronics, and navigation control systems. Given the flammability of polymers and their prolonged high power operation, it is imperative to consider the environmental and human health impact arising from fire incidents during usage. Consequently, there is a strong need to develop easily manageable and highly scalable flame-retardant EMI shielding films. Herein, we present a viable approach for fabricating a series of flexible and flame-retardant films with a sandwich structure that offers adjustable EMI shielding performance. This approach involves coating plating silver nanowires (AgNWs) assisted by polydopamine (PDA) on a commercially available nylon mesh (PA6 mesh), followed by applying a flame-retardant polyvinyl alcohol/guanidine phosphate (PVA/GP) coating. When sprayed coating 0.6 mg/cm 2 AgNWs, the films exhibit an EMI shielding effectiveness (SE T ) up to 55.11 dB, capable of blocking 99.999% of EM waves. Besides, such film possesses remarkable self-extinguishing property and a high thermal diffusion coefficient of 3.54 mm 2 /s. Therefore, the highly lightweight sandwich film holds great promise for multifunctional applications in EMI shielding on a large scale.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Chao Shen,Canran Li,Xianghui Li,Haijun Chen,Dongxun Zhang,Gang Deng,Peng Li,Haolong Wang,Chi Zhao
The urgent need to address severe threats to marine ecosystems from industrial oil pollution and spills drives the development of efficient and robust oil/water separation technologies. Inspired by the anti-fouling mechanisms of marine algae, this study presents a gamma (γ)-irradiation-driven layer-by-layer (LbL) self-assembly strategy to construct a polyvinyl alcohol (PVA)/sodium alginate (SA)/calcium carbonate (CaCO 3 ) multi-layered nanocomposite coating on nylon mesh substrates. Synergistic Ca 2+ crosslinking and γ-irradiation-induced interpenetrating networks confer exceptional mechanical stability (tensile strength: 96.1 MPa, elongation at break: 91.8%) with robust anti-swelling properties. The micro-nano hierarchical surface achieves underwater superoleophobicity (underwater oil contact angle >150°). The PVA/SA/CaCO 3 mesh demonstrates >99% separation efficiency and flux of 1492 L·m -2 ·h -1 for diverse oil/water mixtures under gravity, maintaining 98.6% efficiency after 40 cycles. Mechanical stability persists in extreme environments including anhydrous ethanol, strong alkali (pH = 14), and high-salinity solutions (5 mol/L NaCl). A stable hydration layer enables self-cleaning and anti-fouling behavior, with zero oil adhesion during dynamic impact tests. Critically, solvent-free γ-irradiation without toxic agents, ensuring green fabrication. This work provides an efficient, durable, and environmentally friendly solution for oil/water separation under complex conditions, demonstrating significant potential for marine ecological remediation and industrial wastewater treatment.
研究领域:
环境工程
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材料科学
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化学工程
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海洋生态学
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高分子科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Xu Zhu,Lei Zhu,Jianqiang Zhang,Hui Li,Shifan Yu,Ran Wang,Zechen Yan,Jinwei Xue,Qingzhong Xue
Membrane separation is an appropriate method for the treatment of emulsified wastewater. But emulsified wastewater always contains oil droplets with a broad size distribution, and the tiny oil droplets can easily intrude into the pore of membranes during the separation process, which can cause internal fouling of membranes. Reducing the pore size can alleviate this fouling, however, the strategy may cause a decline in flux. Therefore, a more efficient strategy should be proposed. Herein, modified nylon mesh with well mechanical properties and low crude-oil adhesion was chosen for crude-oil/water emulsion. Before the sieve separation, a preprocessing strategy of squeezing coalescence is applied to the emulsion, resulting in the preprocessed emulsion with large and homogeneous crude-oil droplets. And the preprocessed emulsion can be continuously and efficiently separated by the sieving membrane. Compared with directly separating the original emulsion, separating the preprocessed emulsion can prolong the service life of the sieving membrane. The prepared modified nylon mesh and the coupling of the squeezing coalescence process and the sieving process have the practical application value for industrial crude-oil/water emulsion separation.
研究领域:
环境工程
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·9625-9632
·
IF 9.9
Yang Linfeng,Feng Yaping,He Zengyi,Jiang Xinyan,Luo Xianfeng,Dai Haoyu,Jiang Lei
In recent years, numerous studies have been reported for oil/water separation, such as superoleophilic materials for oil absorption and underwater superoleophobic membranes for continuous separation. However, for the recovery of oil slick pollution on near-shore ocean surface caused by various reasons, large area and fast availability of used materials are needed to be considered. Herein, we report an efficient and environmentally friendly method to fast process nylon mesh by surface diffuse atmospheric plasma (SDAP) for large-area oil/water separation. Nylon mesh is funcionalized by atmospheric plasma to generate micro/nano composite structures on the surface, resulting in superhydrophilicity and underwater superoleophobicity within only seconds. The pre-wetted modified nylon mesh can achieve high efficiency (> 99.9%) and circulating water flux (∼ 30,000 L·m −2 ·h −1 ), with high intrusion pressure (∼ 3 kPa) and universality in oil/water separation. Regular plasma unconditionally generated in the atmosphere with the merit of efficiently functionalizing surface has the potential of large-area materials treatment. This study might take one step further for large-area industrial oily wastewater recovery and even oil slicks collection in near-shore water bodies.
研究领域:
环境科学
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材料工程
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化学工程
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等离子体技术
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溢油修复
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）