INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Zhipeng Deng,Kun Lv,Gang Zhu,Xuezhi Zhao,Yujun Feng
Efficient separation of oil–water mixtures, particularly homogeneous and stable emulsions, has always been an industrial challenge. Herein, we report a facile, cost-effective procedure for fabricating superhydrophobic melamine sponges using a single solution–immersion process. The modified sponge has stable superhydrophobicity owing to the synergy of triple hydrophobic mechanisms with a maximum water contact angle of 158°. As an absorbent, the modified sponge block exhibits high porosity, outstanding absorption capacity, excellent mechanical properties, and superior physical and chemical stability, enabling its use for the separation of stratified oil–water mixtures via repeated absorption–extrusion processes with a separation efficiency of nearly 100%. Furthermore, as a filter, the crushed, modified sponge powders exhibit a demulsification efficiency ranging from 97.65 to 99.33% for the separation of ideal water-in-oil emulsions under gravity. Finally, the feasibility of these sponges for oilfield applications is established through the demonstration of the continuous separation of an emulsion of brine in crude oil using the modified sponge powders in conjunction with an in-house built apparatus. This work may open a viable pathway for the efficient separation of both stratified and emulsified oil–water mixtures via wettability, and provide a novel strategy for the reuse of waste sponges.
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
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Guanzhong Zhai,Junwei Wu,Zhuorui Yuan,Hongmei Li,Daohua Sun
A major challenge in oil/water separation is the processing of surfactant-stabilized emulsions from the water medium. One of the feasible schemes of emulsion separation is the porous melamine sponge coupled with functional particles. Here, we proposed a novel superhydrophobic metal–organic framework (MOF)-based sponge for water-in-oil emulsion separation. The porous melamine sponge was combined with poly(dimethylsiloxane) (PDMS)-coated hydrophobic SiO2 and UiO66-OSiR particles were prepared for demulsification via the one-step dipping method for the first time. The PDMS@SiO2@UiO66-OSiR sponge revealed excellent superhydrophobicity at a water contact angle of 160.7° and superlipophilicity at an oil contact angle of 0°. Compared with the pristine melamine sponge, the size-controllable PDMS@SiO2@UiO66-OSiR sponge could separate stabilized water-in-oil emulsions with ultrahigh separation efficiency (>98.64%) and high flux (e.g., 970 L·m–2·h–1). Meanwhile, the PDMS@SiO2@UiO66-OSiR sponge exhibited superior durability and mechanical reusability. Under harsh conditions such as strong acid and alkali, organic solvent corrosion, etc., all water contact angles of the PDMS@SiO2@UiO66-OSiR sponge were over 152°. Furthermore, the stress decreased by 5% when the sponge was subjected to 10 loading/unloading compression cycles at a constant strain of 60%. These results demonstrate that the PDMS@SiO2@UiO66-OSiR sponge can efficiently separate water-in-oil emulsions through its adjustable porous structure coupled with demulsification and hydrophobic particles. This study provides a step forward in developing a feasible strategy for the MOF-based sponge for emulsion separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2023
·Vol. 34
·期 10
·3247-3259
·
IF 3.4
Maoyuan Pu,Liqin Cao,Li Zhang
The high internal phase emulsion (HIPE) template method is widely used to prepare porous functional materials because of its designable emulsion components and adjustable porosity. Herein, amphiphilic gelatin (GE) as the sole emulsion stabilizer, and no additional emulsifiers were added to prepare a stable GE-HIPE membrane and its zeolitic imidazolate framework-67 (ZIF-67) hybrid composite membrane. The ZIF-67/GE-HIPE composite membrane has good lipophilicity by constructing dual micro-nano structures by HIPE template and in situ growth of ZIF-67. When ZIF-67 was grown in situ, the water contact angle (CA) increased from 58.1 ± 2° for the GE membrane to 121 ± 1.9° for ZIF-67/GE-HIPE composite membranes. Besides, the minimum CA of organic solvent is 4.5 ± 0.7° ( n -hexane). The ZIF-67/GE-HIPE composite membranes exhibit good O/W emulsion separation properties and adsorption removal ability of organic pollutants. After 10 times of recycling emulsion separation, the emulsion separation capacity of the membrane was still greater than 99.4%. The lipophilic dye removal rate of the ZIF-67/GE-HIPE composite membrane was 2.37 times higher than that of GE-HIPE, and the adsorption process conforms to the pseudo-second-order model. Thus, this work provides a strategy for the preparation of GE-based hydrophobic modified membrane and also presents a typical treatment of adsorption-separation of lipophilic substances.
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
RSC Advances
·
2018
·Vol. 8
·期 57
·32522-32532
·
IF 2.936
Hong Lei,Yao Wu,Sen Yang,Chunfang Fu,Jichuan Huo
Preparation of new materials from biomass is good for sustainable development. Carbon/carbonaceous foams (CFs), as important materials widely applied in both military and civil use, are usually made from nonrenewable materials at high temperature (usually over 1000 °C) and high pressure (at MPa magnitude). Although some biomass raw materials have been used, there is still a fascinating issue waiting to be discussed. That is, what kind of biomass would be suitable for making CFs, or what the biggest challenge might be if these raw materials are used. Herein, a CF with advanced compressibility was made from starch with a simple and energy efficient strategy. The product can be made at much lower temperature (below 500 °C) and pressure (∼190 Pa) than conventional strategies. The understanding of the conversion mechanism provides inspiration for the conversion of other biomass into value-added carbonaceous materials. Due to the presence of reactive groups on the surface of the as-prepared CF, the product can be further modified or used as a substrate to prepare composites for catalysis, phase change energy storage, sensors, water purification, and so on. In this work, its potential application in oil/water separation was demonstrated.
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yunhao Pan,Tiancheng Zha,Yanan Zhu,Yibo Zhang,Xunming Tian,Aiwen Wang,Rui Wang,Dongmei Liu,Wei Wang,Shouzhu Li
Wastewater treatment for oil–water emulsions is a critical challenge in the environmental and energy sectors. The oil–water separation based on super-wettability membrane has received widespread attention. However, traditional membranes struggle with severe irreversible fouling due to interactions between emulsified oil and hydrophilic organic compounds in practical wastewater, problematizing continuous separation. Here, a non-synthetic polymer membrane with easy-washability after fouling is reported, which shows full recovery of original separation efficiency. The membrane is composed of cellulose blended with sepiolite, which encapsulates and infiltrates the silica nanofiber membrane through silanol condensation and capillary action, then forms a “tight top, bottom, and inside” flexible fusion structure in one step. The dynamic water absorption capability of sepiolite and cellulose can create an enhanced hydration layer on the dense membrane surface, this allows the membrane to maintain structural integrity and stable separation efficiency even in oil emulsion wastewater containing hydrophilic organic compounds. Also, the membrane may undergo assimilative healing by interacting with pollutants to form part of the membrane structure. So, it shows great performances for extended separation, withstanding oil intrusion pressures over 600 kPa, and nearly 100 % removal for oil emulsions. This promising material offers a universal modification strategy with broad wastewater treatment applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chunyan Huang,Zichen Li,Yuning Pan,Zhili Li,Yuanyuan Ge
Developing efficient dual functional membranes through simple methods to remove various water pollutants remains challenging. Herein, a dual functional geopolymer/copper mesh membrane (GM/CM) was fabricated by one-step coating for oil–water separation and dye degradation. The geopolymer coating, serving as armor, improved hydrophilicity and pore structure, enabling rapid pollutant adsorption and degradation via advanced oxidation processes (AOPs) while inhibiting copper ion leaching. The GM/CM had a water flux of 4936 L m −2 h −1 bar −1 and demonstrated a separation efficiency of over 99 % for five different oil–water emulsions. Copper ions in GM/CM, with multiple valences, could efficiently catalyze reactive oxygen species production from H 2 O 2 . In batch mode, the GM/CM + H 2 O 2 system removed 98.48 % of methylene blue (MB) in water with 1 O 2 as the primary active species. Multiple anions had no significant impact on the degradation efficiency of the GM/CM + H 2 O 2 system. In filtration mode, the GM/CM + H 2 O 2 system achieved over 98 % removal of MB within a continuous 180 min period. Compared to other membranes, GM/CM had both high flux and competitive removal efficiencies. Moreover, due to the ion exchange and chelating effects of the geopolymer armor, the leaching concentration ratio of copper ions was two orders of magnitude lower than that in the unarmored catalyst CM + H 2 O 2 system, and significantly below the standard limit and the results reported in other literature. Overall, this work shows the potential application of GM/CM in water treatment and offers a new method for convenient preparation of dual functional membranes.
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
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Linhan Mao,Hong Chen,Yue Lian,Yan Cao,Xilin Wang,Zhaoxia Chen,Yuhong Zhang
The rapid expansion of the petroleum industry has led to a surge in oil spill incidents, the development of novel superhydrophobic absorbents for the efficient removal of oil spills has become increasingly imperative. In this study, a novel starch-based superhydrophobic composite absorbent was fabricated through a two-step process. Initially, potato starch was gelatinized and then freeze-dried to form a porous starch cryogel (SC). Subsequently, the SC was impregnated with carnauba wax (CW)/polydimethylsiloxane (PDMS) composite solution. After curing, the P-CW@SC with exceptional superhydrophobicity (contact angle = 154.0°) and superoleophilicity was developed. Furthermore, P-CW@SC exhibited excellent self-cleaning properties, anti-fouling efficacy, mechanical strength and chemical stability. Owing to its well-developed porosity, P-CW@SC demonstrated good oil absorption capacities (4.79–13.05 g/g). The selective hydrophobicity and lipophilicity of P-CW@SC enabled effective remediation of underwater oil spills and it could achieve oil-water separation efficiencies exceeding 95.59 % under dynamic conditions after 10 cycles. Upon 50 d of degradation testing in buffer solution, the weight loss rate of P-CW@SC weight reached 43.5 %. Considering its cost-effective raw material composition and simple preparation process, P-CW@SC holds significant potential application in the treatment of oily wastewater and oil spill remediation.
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
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jian-Wu Xiao,Li-Wang Jiang,Yu-Ma Yang,Yun-Feng Zhu,Fu-An He,Dong-Dong Mai
Superhydrophobic electrospun films for oil–water separation, particularly those with multiple functions such as magnetism, catalysis, and piezoelectricity, have received widespread attention. In this work, a novel electrospun superhydrophobic magnetic CoFe2O4@TiO2/polyvinylidene fluoride (PVDF) composite film was fabricated. Firstly, a CoFe2O4@TiO2 hybrid filler was prepared by a simple and effective solvothermal method, and its structure and magnetism were confirmed by different characterization techniques. Secondly, the electrospun CoFe2O4@TiO2/PVDF composite film was prepared and then modified with trimethoxy(1H,1H,2H,2H-heptadecafluorodecyl)silane (HFDS) to form the electrospun HFDS-CoFe2O4@TiO2/PVDF composite film. The resulting HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film was found to be superhydrophobic and could achieve oil–water separation by gravity filtration and direct absorption, with absorption capacities for valorous oils ranging from 7.7 g g−1 to 8.2 g g−1. The crystallinity degree of the polar piezoelectric β- and γ-form crystals of PVDF in the HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film was 25.1%, whereas the corresponding value of the pure PVDF solid film was only 14.3%. In addition, the HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film exhibited a magnetization strength of 0.69 emu g−1 at 20 000 Oe and could catalyze the degradation of Sudan Red dye. The multi-functional CoFe2O4@TiO2/PVDF composite film demonstrates its potential for various applications in oil–water separation and other fields.
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
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Jianfu Wang,Yi Lin,Wei Bing,Huichao Jin,Jie Zhao,Limei Tian
Superhydrophobic materials can solve the problem of oil pollution in water resources. In this paper, superhydrophobic PDMS-SiO 2 with macro-micro-nano multi-level structures was prepared by impregnation method. The superhydrophobic PDMS-SiO 2 material has good physical and chemical stability, and retains its superhydrophobicity after sandpaper abrasion, tape peeling, water immersion, acid or alkali immersion, and high temperature baking. The superhydrophobic PDMS-SiO 2 material has a high oil-water separation efficiency, with the highest oil-water separation efficiency reaching more than 99%, and the oil-water separation efficiency of different oils all exceeding 96%. The preparation of superhydrophobic PDMS-SiO 2 material is simple, inexpensive and environmentally friendly, which can achieve fast and large-area preparation, with good engineering application prospects.
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
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Congcong Cui,Hong Chen,Linhan Mao,Yanwen Xiao,Qiaoyu Huang,Zhaoxia Chen,Yuhong Zhang
With the rapid development of industry and the increasing discharge of oily wastewater, there is a growing interest in superhydrophobic materials for oil-water separation and water pollution remediation. At the same time, there is an urgent need for materials capable of oil-water separation and wastewater degradation. In this paper, superhydrophobic photocatalytic cotton fabrics were prepared by introducing zinc oxide nanoparticles (ZnO NPs) on pristine fabrics (PF) to obtain a micro/nano-rough structure, octadecylamine (ODA) to provide a low surface energy, and epoxy resin (ER) used as an adhesive to enhance the adhesion between the ZnO NPs and the fabric. The prepared ODA-ZnO-ER@PF has excellent superhydrophobicity with a water contact angle (WCA) of 156.5° and self-cleaning ability. Due to its good photocatalytic properties, it can basically degrade methylene blue (MB) and rhodamine B (RB) in water after 12 h of UV irradiation. In addition, ODA-ZnO-ER@PF has excellent mechanical properties and maintains good superhydrophobicity after mechanical abrasion, ultrasonic washing, tape-peeling, UV irradiation and acid or alkali immersion. Gravity-driven oil-water separation simulation experiments indicated that ODA-ZnO-ER@PF has good oil-water separation efficiency and recyclability. This superhydrophobic, photocatalytic and mechanically durable material shows promising applications in the treatment of oil-water pollutants.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Huimin Zhang,Zhiguang Guo
Petroleum pollution and industrial emissions of organic pollutants have become significant issues affecting both ecological and human living environments. High-performance oil–water separation membranes, due to their advantages such as low cost, environmental friendliness, and ease of operation, hold vast application prospects. Therefore, the development of efficient oil–water separation membranes is crucial. We propose a clever approach involving the synergistic self-assembly of chitosan (CS) and hydroxylated multi-walled carbon nanotubes (MWCNTs) on cotton fabric to construct a rough structure. Combined with hydrophilic modification using polyvinyl alcohol (PVA), not only does this enhance wettability, but it also addresses challenges related to mechanical strength and dispersibility of cotton fabric. The resulting CMF-PVA fabric performs well under challenging conditions, exhibiting excellent separation efficiency and permeance. Particularly noteworthy is that CMF-PVA achieves separation efficiencies exceeding 99.33 % for various organic substances, with a water flux reaching 35,476.52 L m −2 h −1 and a surfactant-stabilized emulsion permeance of 1199.0 L m −2 h −1 ·bar −1 . Furthermore, CMF-PVA demonstrates outstanding mechanical durability under harsh conditions and excellent acid-base resistance. This method harnesses the inherent properties of CS and MWCNT self-assembly while enhancing the material's applicability on cotton fabric through hydrophilic modification. CMF-PVA fabric is poised to enhance selectivity, efficiency, anti-pollution properties, and accessibility in oil–water separation technology.
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
POLYMER
·
2024
·
IF 4.1
Bo Zhang,Qingzhe Mao,Wenchong He,Rongqing Zhou,Chongde Wu,Nicolas Hengl,Frederic Pignon,Yao Jin
Catechol-amine co-deposition membranes have garnered significant interest in enzyme immobilization, yet the deposited coating leads to excessive mass transfer resistance, negatively impacting membrane filtration performance. This work adjusts polyphenol deposition by utilizing the co-deposition structure with tannic acid (TA) and 3-aminopropyltriethoxysilane (APTES) with glycerol to enhance the filtration capability while maintaining enzyme activity. The glycerol addition has brought in a structural transition from dense nanosphere stacking to the loose flaky structure of greater bulkiness. Consequently, the resulting membrane showed a 69 % of permeability improvement along with improved enzyme activity post-adjustment. In oil-water separation cycle tests, the biocatalytic membrane enabled the clarification of oil emulsions and facilitates offline self-cleaning, maintaining high permeability and recovery even after five cycles of heavy oil (4 g/L) filtration, showing great application potential in edible oil-water separation. The biocatalytic membrane of this work, derived from biomass and characterized by its facile preparation and minimal mass transfer resistance, presents a promising avenue for the integration of biocatalysis with filtration technologies within industrial production processes.
研究领域:
生物技术
·
材料科学
·
环境工程
✓ 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）