CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Guanghui Zhang,Yan Liu,Chao Chen,Lulu Long,Jinsong He,Dong Tian,Ling Luo,Gang Yang,Xiaohong Zhang,Yanzong Zhang
Superwettability materials with a single function cannot meet the needs of different oil-bearing wastewater separations. This study proposed a preparation method for the swappable superwettability on cotton fabrics. The superhydrophobic fabric surface that was wetted with ethanol transformed from being superhydrophobic/superoleophilic to being superhydrophilic/underwater superoleophobic, and returned to superhydrophobicity after drying. Regardless of whether it is the oil removal process or the water removal process, the flux of the fabric was above 15,300 L·m −2 h −1 , and the separation efficiency was over 98.6%. Although the continuous separation was conducted 50 times, the flux and separation efficiency did not change significantly. The prepared material could exhibit superhydrophobicity after being immersed in solutions of different pH and actual seawater for some time, even after 50 times of sand impact experiments, indicating excellent mechanical durability and chemical stability. Thus, the preparation strategy of the swappable superwettability materials can develop oil–water separation technology.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Bionic Engineering
·
2021
·Vol. 18
·期 5
·1168-1178
·
IF 2.682
Liao Chenchen,Xia Yurou,Keshen A. Yinaer Nu,Dai Boya,Zhao Song’an,Hu Ziqing,Zheng Zaihang,Liu Yan
Inspired by nature, a superhydrophobic and magnetic melamine sponge (BFSM-MF) was fabricated by a one-step dip-coating method. Aiming at replacing nano-Fe 3 O 4 particles with a complex preparation process and high cost, the commercial and cheap Fe 3 O 4 originated from magnetite was employed as a magnetic substance. To acquire superhydrophobicity, the hierarchical mirco/nano-sized structure with low surface energy was mainly contributed by bonding hydrophobic Fe 3 O 4 and graphene with silicone resin onto the surface of the melamine sponge. The results demonstrated that the water and oil static contact angle values of BFSM-MF were 160° and 0°, revealing that BFSM-MF was superhydrophobic and super-oleophilic. Moreover, the self-cleaning ability, magnetic-driven oil absorption ability and continuous oil–water separation performance of BFSM-MF have also been evaluated. As expected, BFSM-MF possessed magnetic-driven oil absorption ability and the oil–water separation efficiency for light oil reaches 98% ± 1%. In addition, the adsorption capacity and recycling performance of different organic solvents were systematically investigated. Therefore, the development of biomimetic, fluorine-free and superhydrophobic foam with magnetic-driven effect has potential application value in marine oil spill treatment and separation of domestic oil pollution.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Wanzheng Ren,Jian Pan,Wenqiang Gai,Xinyu Pan,Haimei Chen,Jiao Li,Lilan Huang
A crucial step in the purification and recycling of industrial waste oil is the separation and removal of trace water from emulsified oil. After optimizing the polymer content, solvent composition, and SiO 2 nanoparticle addition amount of the spinning precursor solution, a Polyvinylidene fluoride- co -trifluoroethylene chloride (PVDF-CTFE)/SiO 2 nanofibrous membrane with micro and nano-rough structure was prepared by electrospinning. Using scanning electron microscopy, a pore size analyzer, a contact angle tester, a single-fiber strength tester, and a gravity separation experiment, the influence of SiO 2 addition on the morphology, pore size distribution , wettability , mechanical, and separation properties of the modified membranes was characterized. The results demonstrated that the water contact angle of the nanofibrous membrane was increased to 151.3° of superhydrophobic when SiO 2 was added at a concentration of 2.5 wt%. The nanofibrous membranes exhibited outstanding separation performance (>99%) for water-in-oil mixtures and emulsions, as well as for various oil-water systems. Moreover, the PVDF-CTFE/SiO 2 nanofibrous membranes exhibited superior multi-cycle performance and consistent chemical resistance. This research yielded a novel material and a straightforward method for fabricating superhydrophobic nanofibrous membranes, which demonstrated greater application potential in oil-water separation.
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
Applied Sciences-Basel
·
2020
·Vol. 10
·期 6
·1985
·
IF 2.474
Jialu Zhang,Hao Xu,Jie Guo,Tianchi Chen,Hongtao Liu
To facilitate the recycling and reuse of cigarette filters and oil/water separation, a superhydrophobic cigarette filter was made by coating with dodecanethiol-modified polypyrrole (Ppy) particles by a dip-coating method. SEM, FTIR, and XPS were used to analyze the surface morphology and chemical compositions. The as-prepared superhydrophobic cigarette filter can realize wettability alteration via changing the ammonium persulfate (APS) concentration from 0.15 mol/L to 3 mol/L, and the contact angle increased from 0° on the original cigarette filter to 155° with a sliding angle of 5°. The superhydrophobic cigarette filter could effectively separate various oils and organic solvents. The separation efficiency was 98.8% and the separation stability was good. Furthermore, the as-prepared superhydrophobic cigarette filter had a large oil absorption range and could absorb different oils and organic solvents, including petroleum ether, engine oil, vegetable oil, n-hexane, and chloroform, with maximum absorption capacities ranging from 9.4 g/g to 22.7 g/g. According to the above results, we believe that the as-prepared superhydrophobic cigarette filter should have great potential in the recovery of solid waste and high-efficiency oil/water separation.Keywords:polypyrrole;superhydrophobicity;oil/water separation;cigarette filter
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Haoyu Wang,Jinghui Wang,Mei Cui,Rongxin Su,Renliang Huang
The oil-absorbent sponge is effective in the prevention and cleanup of offshore oil spills. However, biofouling in marine environments will significantly reduce its oil absorption capacity. Herein, a novel type of antifouling and superhydrophobic polyurethane (PU) sponge was successfully prepared via grafting Econea (antifouling agent) to diisocyanate monomer and hydrophobic modification of PDMS (Polydimethylsiloxane) and SiO 2 . The prepared PDMS-SiO 2 @PU-Econea sponge shows not only super-hydrophobicity with a WCA of 154.5° but also excellent antifouling properties with more than 99% of inhibition to Escherichia coli after immersed in artificial seawater (salinity ≈35‰) for 50 days. It can absorb 133.9 times of trichloromethane than its own weight and still maintain 98.5% of absorption after 50 cycles. In addition, the PDMS-SiO 2 @PU-Econea sponge exhibits excellent continuous oil–water separation performance. The separation fluxes of n-hexane and dichloromethane are 151.0 and 136.3 L·h −1 ·g −1 , respectively, and the oil–water separation efficiency is up to 99.9%, it can absorb 50 times of crude oil than its own weight in 75 s. Therefore, the antifouling and superhydrophobic PDMS-SiO 2 @PU-Econea sponge is a promising and applicable oil absorbent sponge for long-term oil/water separation and cleanup of oil spills in marine environment.
研究领域:
材料科学
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环境科学
·
海洋学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Qun Wang,Binjie Xin,Yifan Wang,Guangtao Zan,Shengyou Li,Kaiying Zhao
Oiled wastewater generated from industrial processes inflicts significant harm on the environment, posting a pressing need for affordable materials that provide prospect for effective oil-water separation and the recovery of valuable oil resources from such wastewater. The incorporation of zeolitic imidazolate framework (ZIF) onto the commercial cotton fabric, due to its porous structure and adjustable properties, offers a promising solution to this challenge. In this work, a cotton fabric with multifunctionalities was designed by in situ growing ZIF-67 onto cotton (ZIF-67@Cotton). The robust superhydrophobic surface was successfully created on ZIF-67@Cotton by combining a self-roughness structure with the modification using a low surface energy agent. This modification imparts versatility, enabling self-cleaning, high-efficiency oil-water separation, and mechanical stability. The resulting ZIF-67@Cotton exhibits a desirable water contact angle (WCA) superhydrophobic characteristic (over 156°), and exceptional resistance to mechanical abrasion during laundering. Notably, this superhydrophobic ZIF-67@Cotton not only efficiently extracts oil from oil/water mixtures with a efficiency over 99.5 % and water-in-oil emulsion (99.3 %) after repeating 20 times but also exhibits superior UV resistance which introduces an innovative approach to develop next-generation multifunctional flexible fabrics featuring superhydrophilic and underwater superoleophobic surfaces.
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
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Linlin Yu,Jiawei Ji,Ruoyu Chen,Qian Jia
Frequent oil spill incidents and increasing amounts of industrial wastewater pose a serious threat to the environment. The use of superhydrophobic materials to separate oil/water mixtures has attracted widespread attention. In this work, a superhydrophobic sponge based on MOF-5 was prepared to achieve efficient continuous oil–water separation and emulsion purification. HDTMS-MOF-5@PDA@MS (H-MOF-5@PDA@MS) not only exhibited superhydrophobic property (WCA = 153.8°, SA = 6.5°) but also exhibited excellent saturated adsorption capacity, with an oil adsorption capacity of 66 (petroleum ether)-168 (chloroform) g/g and oil–water separation efficiency of 99.2%. It also demonstrated efficient performance in various emulsion purification processes. Furthermore, it maintained a stable superhydrophobicity in some extreme environments. H-MOF-5@PDA@MS is expected to have wide application perspective in the fields of environmental pollution control and wastewater treatment due to its low cost, simple process, excellent oil–water separation efficiency, reusability, and environmental friendliness.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xinyue Duan,Yingqing Zhan,Hongshan Jia,Jie Liu,Yajie Lei,Jing Yang,Yuxing Han
MXene nanosheets based membrane materials encounter challenges in the field of oil-water separation, including narrow interlayer spacing, insufficient stability, and limited photocatalytic self-cleaning efficiency. To address the aforementioned issues, the 2D/2D MXene nanosheets based heterojunction was constructed through in situ growth of porous ZnIn 2 S 4 and freely assembled onto a PAN fibrous membrane with via vacuum-assisted self-assembly technology. The resulting MXene/ZnIn 2 S 4 @PAN fibrous composite membrane (FCM) exhibited high flux and exceptional photocatalytic self-cleaning property. On the one hand, the porous petal-like structure and intrinsic hydrophilic nature of MXene/ZnIn 2 S 4 heterojunction offered the remarkable nanochannel modulation capability, enabling the composite membrane to achieve high permeability (5471.13 -6732.57 L m -2 h -1 ) compared with the conventional MXene based composite membranes with compacted lamellar structure. On the other hand, the heterojunction formed between MXene and ZnIn 2 S 4 significantly improved electron conduction efficiency and effectively regulated the energy band structure, as confirmed by electrochemical impedance spectrum and UV–visible near infrared diffuse reflection test. This imparted the composite membrane with exceptional photocatalytic self-cleaning capability for the degradation of organic dyes, with the degradation efficiency reaching as high as 92.15%. Besides, the rational photocatalytic mechanism was proposed on the basis of free radical quenching and EPR experiments. Such high-flux and enhanced self-cleaning PAN FCM showed the potential in dealing with complicated membrane fouling issues and separating emulsified oily wastewater.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Dongyin Li,Fuchao Yang,Xuan Shi,Guangyi Tian,Changhui Fu,Yifan Liu,Zhiguang Guo
In recent years, oil pollution and industrial organic pollutants discharge has become a major problem affecting the ecological and human living environment, and the removal of oil in oily wastewater is increasingly urgent, especially for emulsion separation. Therefore, it is crucial to develop efficient oil–water separation membranes with low cost, green sustainability, and ease of operation. Herein, an ingenious spraying hybrid coatings containing ZIF-67 (Zeolitic Imidazolate Framework-67) and polypyrrole (PPy) onto stainless steel mesh (SSM) and polyvinylidene fluoride (PVDF) was proposed. Through solidification and cooperative self-assembly to build rough structures, oil–water separation membranes ZIF-67@PPy SSM and ZIF-67@PPy PVDF have been obtained, which are hydrophilic and oleophilic in air and superoleophobic underwater. Depending on the scenario, on-demand separation of light oil/water mixtures and oil-in-water emulsions can be easily realized. The resulting oil–water separation membranes performed well that the separation efficiency of ZIF-67@PPy SSM can exceed 99.3% for all kinds of light oil/water mixtures, with a water flux of up to 66250 L/(m2·h), and maintains a separation efficiency of 98.5% even after 50 cycles. ZIF-67@PPy PVDF has a separation efficiency of more than 99.4% for various oil-in-water emulsions, and sustains outstanding performance despite undergoing 10 cycles. In addition, ZIF-67@PPy SSM and ZIF-67@PPy PVDF are sustainable in harsh environments, with good mechanical durability and some antimicrobial properties. The coatings prepared in this work that can be used for the separation of light oil/water mixtures and oil-in-water emulsions, and the proposed combination of multiple separation strategies are expected to improve the selectivity, improve efficiency, enhance contamination resistance, and increase accessibility of oil–water separation technologies.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Bionic Engineering
·
2022
·Vol. 20
·期 3
·900-909
·
IF 2.995
Zhong Xin,Guo Zhiguang
Oil–water mixing has brought many problems to a society, and it is of great significance to develop a simple, convenient, efficient, and durable separation material to solve the problem of oil–water mixing. In this paper, modified cottons were successfully prepared using polydopamine as the in situ mineralization site of TiO 2 nanoparticles combined with synergistic crosslinking with KH550. A large number of hydrophilic groups endowed the cotton with superhydrophilic ability, which greatly shortened its water spreading time. The prepared modified cotton could be successfully separated from oil and water, and still had a separation efficiency of 99.999% after 50 cycles. In addition, after 24 h immersion in 1 M HCl, NaOH, and NaCl solutions and 50 abrasion experiments, the modified cotton showed excellent oil–water separation ability, and the separation efficiency was above 99.990%. Successfully provided a simple preparation method to prepare high-efficiency and clean cottons for oil–water separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yongfei Zhu,Yonggang Du,Junming Su,Yanchao Mo,Shujuan Yu,Zhi Wang
Oil/water separation through superhydrophobic sponges is an important method for oily wastewater and organic solvents pollution treatments, and developing a simple and eco-friendly approach to fabricate superhydrophobic sponge is still very urgent and valuable. In this work, Fe 3 O 4 and bio-benzoxazine based on cardanol and long-chain aliphatic amine were successively loaded on melamine sponge (MS) through a simple dip-coating method, which was thermally cured to obtain superhydrophobic MS. The as-prepared superhydrophobic MS (P15C-O/Fe 3 O 4 /MS) not only exhibited high oil absorption capacity from 65.8 to 136.2 times its own weight for various oils and organic solvents, but also showed excellent recyclability with a water contact angle (WCA) of about 149° after 50 absorbing-squeezing cycles and an absorption retention of more than 92% after 100 cycles. Moreover, P15C-O/Fe 3 O 4 /MS also possessed outstanding chemical stability, whose WCA almost kept unchanged after touching with strong acid (pH = 1) and alkali (pH = 13) as well as NaCl solutions for 48 h. The outstanding recyclability and stability of P15C-O/Fe 3 O 4 /MS were from the stability of polybenzoxazine and strong adhesion between the coating and sponge, due to the formation of coordination interactions between Fe 3+ and N, O atoms as well as hydrogen bonds between polybenzoxazine and sponge. In addition, P15C-O/Fe 3 O 4 /MS could be used for continuous oil-water separation and driven remotely by a magnetic force. These advantages make P15C-O/Fe 3 O 4 /MS a potential candidate for large-area oil-spill cleanup and oily wastewater treatment, especially under some dangerous conditions.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 11
·50038
·
IF 2.52
Linjiong Zhang,Lianfang Feng,Xueping Gu,Cailiang Zhang
Oil spills and organic chemical leakage have caused serious environmental problems, calling for highly effective adsorbents at low cost. Superelastic and hydrophobic-oleophilic modified melamine foams with ultralow amounts of well-dispersed graphene were prepared via dip-coating. The composite foams showed high selectivity for adsorbing various organic chemicals from water and could be regenerated easily. Moreover, excellent adsorption capacity ranging from 80 to 170 times its own weight was found depending on the density of organic chemicals. These coated foams show great potential for continuous oil/water separation and oil fume removal.
研究领域:
材料科学
·
环境科学
✓ 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）