SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaoyun Sun,Ke Shi,Siqi Mo,Jinfeng Mei,Jian Rong,Shaomang Wang,Xudong Zheng,Zhongyu Li
A reinforced-concrete-structured sponge based on amino-terminated polydimethylsiloxane (PDMS) and carboxyl carbon nanotubes (CCNTs) is synthesized, without any templates or coatings. The covalent bonding of PDMS and CCNTs generate amide groups which provide considerable hydrogen bonds. The synergistic effect of dynamic hydrogen bonds and flexible PDMS chains contribute to the high elasticity, while CCNTs affect the stress. The compressive and tensile stress-train curves both overlap with the first curves during multiple load-release cycles, at the compressive strain of 80% and the tensile strain of 100%, respectively. The amount of CCNTs determines the porosity, and significantly affects the hydrophobicity. The sponge is applied to static oil adsorption, oil/water emulsion separation and oil-spill treatment. Due to the high elasticity and anti-fatigue performance, the sponge can be repeatedly regenerated using a simple squeezing method. The adsorption capacity still reaches 99.45% after 30 adsorption–desorption cycles. The weight, morphology and hydrophobicity of the sponge maintain unchanged, either. The simulation of oil-spill treatment demonstrates that the sponge can also work efficiently under dynamic conditions. The high elasticity, recyclability and stability propose the sponge to be a promising material for oily-water treatment in complex circumstances.
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
SN Applied Sciences
·
2020
·Vol. 2
·期 9
·1-10
·
IF 0
Alassod Abeer,Islam Syed Rashedul,Farooq Amjad,Xu Guangbiao
Polypropylene is widely used in oil spillage cleanup due to excellent characteristics. However, polypropylene is not renewable and biodegradable, which is unacceptable to introduce new pollutants while solving environmental disasters. Therefore, there is a high demand to explore a low-cost, environmentally friendly, and renewable technique for the fabrication of porous materials. In this work, lignin was chosen as the second blend in the polymer matrix. Polypropylene and renewable lignin sponges were successfully prepared using simple, inexpensive, controllable, scalable, and an environment-friendly method named thermally induced phase separation (TIPS). The surface morphology of obtained sponges was investigated using FTIR and SEM. FTIR analysis indicated that PP and lignin were physically blended. SEM analysis observed an interconnected porous network that acts as a capture site of oil, and lignin merged into PP. The contact angle of PP, PP5L, PP10L, PP15L, and PP20L was found to be 127.4°, 118.71°, 113.89°, 109.45°, and 107°, respectively. Furthermore, polypropylene/lignin sponges have good adsorption ability toward oils compared to polypropylene itself. The research detected that the highest oil sorption tests exhibited by PP10L sponge, which could absorb 983% of soybean oil, 788% of engine oil, and 550% of lubricating oil in the oil system, with high oil retention more than 90% after 24-h dripping. Besides, the results revealed that temperature has a significant effect on oil absorption. All of these features make polypropylene/lignin blend sponges promising sorbents for the oil spills cleanup, not only for oil recovery but also helps in cleaning the environment.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Ting Dong,Na Tian,Bing Xu,Xiaohua Huang,Shan Chi,Yanming Liu,Ching-Wen Lou,Jia-Horng Lin
Superhydrophobic aerogels are attractive candidates in controlling oil spills. The major challenges for existing aerogels are the construction of mechanical endurance as well as accessible of building materials. Herein, a newfangled biomass superhydrophobic aerogel (M-PCF/CS) with both superior compressibility and oil caption speed is fabricated by assembling poplar catkin fiber (PCF) hollowed-out shell of 330 nm and chitosan (CS) into tubular-lamellar interweaved neurons-like structure. The resultant aerogels (porosity ~ 96.12%), with flexuous PCF as the elastic buffer and second-pore capillaries, exhibit large longitudinal and transverse compressibility , endurable fatigue tolerance, fast oil sorption rate with a capacity of 28.8–78.1 g/g at 5–25 s. In parallel, the aerogels are tolerant of NaCl, UV radiation, and organic solvents without superhydrophobic variation and a case of oil spill remediation via pump-supported experiment shows that the aerogels facilely achieve continuous oil recycling from seawater by 23052–43956 L·m –2 ·h –1 . Furthermore, the resultant M-PCF/CS, with assistance of an oscillator, can be applied to separate oil/water emulsions with efficiency of 98.07–99.11%. The successful fabrication of this material provides a new design strategy for the construction of mechanically robust aerogels for speedy and economical cleanup of oil pollutants from water.
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
ENVIRONMENTAL ENGINEERING SCIENCE
·
2018
·Vol. 35
·期 7
·696-702
·
IF 1.547
Xinying Zhang,Chaoqun Wang,Wenbo Chai,Xiaoyan Liu,Yanming Zhang
A superhydrophobic CeO2-modified kapok fiber (SCMKF) was fabricated using CeO2 and octadecyltrimethoxysilane (OTMS) by a simple chemical deposition method. Scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron microscopy, and the wetting behavior of water and oil on the surface were conducted to confirm the formation of CeO2 nanoparticles and the combination of OTMS with the surface. The SCMKF had the superhydrophobicity and good sorption capacity. The contact angle of raw kapok fiber (RKF) was 114.7°, however, that of SCMKF exceeded 150°. Oil absorption capacities of SCMKF for diesel oil, soybean oil, and lubricating oil were 48.65, 58.17, and 62.57 g/g, increased by 76.5%, 51.9%, and 51.9%, respectively, compared with RKF. Sorption of SCMKF could be well described by pseudo second-order kinetics. The SCMKF could reach the adsorption saturation within 3 min. After eight cycles, the oil sorption capacities of SCMKF decreased, but they were still much higher than those of RKF. The SCMKF showed good performance in the separation of oil–water mixture. It is a promising material for cleaning oil spill.
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
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2019
·Vol. 95
·期 3
·730-738
·
IF 2.659
Yating Wang,Xu Li,Xiu Dai,Yixing Zhan,Xiaoqing Ding,Ming Wang,Xinglong Wang
BACKGROUND With the rapid industrial and urbanization development, a large amount of oily wastewater is generated from various sources. It is mutagenic and carcinogenic to human health and seriously affects the ecosystem. In this study PLA/ZIF-8@C600 nanofibers were prepared for oil adsorption. RESULTS Hybrid nanoparticles (ZIF-8@C600) of carbon black C600 and zeolitic imidazolate framework-8 (ZIF-8) with high specific surface area and porous structure were prepared by co-deposition and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FITR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and contact angle measurement. Biodegradable composite nanofiber membranes of poly(lactic acid) (PLA) and ZIF-8@C600 were manufactured by electrospinning. The SEM and contact angle results showed that the addition of ZIF-8@C600 could adjust the diameter, porosity, pore size and hydrophobicity of the composite electrospun nanofibers. The PLA/ZIF-8@C600 porous membranes had good oil sorption properties in oil–water mixture and emulsion. The oil adsorption capacity of the sample with 1 wt% ZIF-8@C600 was improved by ∼72.59% compared with that of pure PLA (13.5 g g −1 ), which demonstrated that the PLA/ZIF-8@C600 fibers were good candidates as oil sorbents. The adsorption kinetics of the membranes on paraffin liquid was in accordance with pseudo-second-order kinetics. CONCLUSION The addition of hybrid ZIF-8@C600 improved the hydrophobic properties and oil adsorption capacity of PLA/ZIF-8@C600 porous membranes. Because PLA is an environmentally friendly polymer, composite membranes based on it can avoid secondary pollution. Overall, these findings have good prospects for future treatment of oily wastewater. © 2019 Society of Chemical Industry
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
Polymers
·
2021
·Vol. 13
·期 4
·625
·
IF 4.329
Qianqian Shang,Jianqiang Chen,Yun Hu,Xiaohui Yang,Lihong Hu,Chengguo Liu,Xiaoli Ren,Yonghong Zhou
A facile and environmental-friendly approach was developed for the preparation of the cross-linked nanocellulose aerogel through the freeze-drying process and subsequent esterification. The as-prepared aerogel had a three-dimensional cellular microstructure with ultra-low density of 6.05 mg·cm−3and high porosity (99.61%). After modifying by chemical vapor deposition (CVD) with hexadecyltrimethoxysilane (HTMS), the nanocellulose aerogel displayed stable super-hydrophobicity and super-oleophilicity with water contact angle of 151°, and had excellent adsorption performance for various oil and organic solvents with the adsorption capacity of 77~226 g/g. Even after 30 cycles, the adsorption capacity of the nanocellulose aerogel for chloroform was as high as 170 g/g, indicating its outstanding reusability. Therefore, the superhydrophobic cross-linked nanocellulose aerogel is a promising oil adsorbent for wastewater treatment.Keywords:nanocellulose;aerogels;cross-linking;superhydrophobic;oil adsorption
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
Gels
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2021
·Vol. 7
·期 2
·66
·
IF 4.702
Zhongjie Zhu,Lei Jiang,Jia Liu,Sirui He,Wei Shao
A superhydrophobic fluorinated silica functionalized chitosan (F-CS) aerogel is constructed and fabricated by a simple and sustainable method in this study in order to achieve highly efficient gravity-driven oil/water separation performance. The fluorinated silica functionalization invests the pristine hydrophilic chitosan (CS) aerogel with promising superhydrophobicity with a water contact angle of 151.9°. This novel F-CS aerogel possesses three-dimensional structure with high porosity as well as good chemical stability and mechanical compression property. Moreover, it also shows striking self-cleaning performance and great oil adsorption capacity. Most importantly, the as-prepared aerogels exhibits fast and efficient separation of oil/water mixture by the gravity driven process with high separation efficiency. These great performances render the prepared F-CS aerogel a good candidate for oil/water separation in practical industrial application.Keywords:superhydrophobicity;fluorinated silica;chitosan;oil adsorption;oil/water separation
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
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2019
·
IF 7.149
Cheng Chen,Xiaoying Zhu,Baoliang Chen
One of the most pervasive environmental issues is the frequent oil spills that happen during oil production and transportation processes. This global challenge calls for emerging materials that can effectively separate oil pollutants from water. Here, a facile and feasible method to fabricate a high-performance oil absorbent (ODA-rGO@MF) through the coating of octadecylamine-grafted reduced graphene oxide (ODA-rGO) on the skeleton of commercial melamine foam (MF) is reported. The resultant foam not only possesses the hierarchical pore structure, superior compressibility, and mechanical stability of the original foam but also exhibits high water repellency, superhydrophobicity, and durability under harsh conditions, such as in strongly acidic (alkaline) and salty solutions. The superhydrophobicity of ODA-rGO@MF was created by employing the microarchitecture of MF, forming the rough rGO nanoscale wrinkles on the foam skeletons and further reducing the surface energy by octadecylamine (ODA). These fascinating characteristics make the functionalized foam an excellent oil absorbent with a high absorption capacity (44–111 times its own weight) and extraordinary recyclability. More importantly, the inexpensive materials and low-cost fabrication technique make it possible for large-scale production. Thus, the as-prepared foam has the potential to be used as a promising absorbent for oil-spill cleanups.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Yi Feng,Shichang Liu,Guozhen Liu,Jianfeng Yao
Porous carbon spheres with a diameter of 1–2 cm were prepared via a simple carbonization of the fruit of Liquidambar formosana . After carbonization, the spherical structure and inner finger-like pores were maintained with high resistance to impact. Due to the porous structure and the hydrophobic nature, the carbonized fruit of Liquidambar formosana can float on the water surface and show a super-fast oil or organic solvent sorption ability (sorption saturation can be achieved within 1–2 min). Moreover, about 99% of adsorbed oil can be easily removed from spheres via organic solvent such as ethanol or hexane, which shows good recyclability of samples. In general, considering the low-cost and abundance of raw material collected from nature and the facile synthetic process (only by carbonization), the centimeter-sized porous spheres via the carbonization of fruit of Liquidambar formosana are very promising to be used for the application of oil or organic solvent spill cleanup.
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
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Zhuli Yang,Xubin Wu,Jiao Han,Shuyan Xu,Fengmiao Li,Fuwang Guan,Yiping Qiu
As a biodegradable material with high oil adsorbing efficiency, kapok fibers have a natural large lumen with a microporous cell wall. Superhydrophobic modification was carried out to enhance its oil absorbency. Kapok fiber (KF) and kapok powder (KP) were pretreated with three different solutions and subsequently modified using methyltrichlorosilane. Results indicate that different solutions of pretreatment exerted different effects on the structure and modification efficacy. Superficial wax of kapok was removed in pretreatment along with the interstice-filled lignin and hemicellulose , which caused the generation of wrinkles and cracks. Consequently, the surface area and pore width increased to provide more sites for silane to attach. Silane nanoparticles were observed to graft onto the kapok surface after modification and they revealed a preference for NaClO 2 -treated surface. The modified KF and KP obtained hydrophobic surface and higher oil absorbency. Notably, NaClO 2 -treated KP obtained the superhydrophobic effect whereas NaClO 2 -treated KF acquired optimum oil adsorption capacities.
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
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Ning Zhang,Yu Zhou,Yana Zhang,Wei Jiang,Tianhe Wang,Jiajun Fu
Polystyrene is a common material featured with its low cost. In this work, a novel low dense polystyrene sponge with superhydrophobicity and compressibility was prepared successfully by a dual-templating method, including High Internal Phase Emulsions (HIPEs) processing and the introduction of organic template species. For the first time stearic acid or calcium stearate was introduced into the HIPEs system to enhance micro roughness and impart the PolyHIPEs with superhydrophobicity. Besides, owing to the low density, high porosity, interconnected network structure and ultra large void size, the sponge exhibited fast oil adsorption rate and superior oil adsorption capacity of 66.2 g/g toward diesel. After adsorption saturation, the sponge was regenerated by simple squeezing with the deoiling rate over 80%. Importantly, the sponge showed swellable property and about 80% of the initial adsorption capacity was retained after 10 adsorption-compression circles. High adsorption rate, excellent oil adsorption capacity, high selectivity, low cost, compressibility and renewability, all these favourable properties make it an ideal and practical oil adsorbent.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xuefeng Chen,Xiao Gong
Oily wastewater and marine oil spills are a massive environmental and human threat. Conventional oil spill treatment methods include adsorption by absorbent materials, dispersants or adsorbents, and in situ burning. Superhydrophobic materials, as a material that can achieve oil-water separation, have great potential for application in oil spill treatment. Research on superhydrophobic oil spill treatment mainly focuses on materials such as sponges and fabrics. Although these materials can effectively perform oil-water separation or oil spill adsorption, they also have the disadvantages of complicated preparation methods and high costs. Here, we present a miniature device for oil-water separation and oil spill collection and recovery. The superhydrophobic copper mesh box can be used on its own as an oil-water separation device or in combination with a commercial polyurethane sponge as a miniature oil-absorbing device. The robust copper mesh is prepared in two steps: anodizing and impregnation. The superhydrophobic copper mesh had a high oil separation flux (32,330 L m −2 h −1 ) and efficiency (97%), which remained high (28,560 L m −2 h −1 ) and efficient (95%) after 20 cycles of separation. The combined micro oil adsorption device can adsorb different oils and fats on the water surface, and it has good reusability with oil adsorption capacity and efficiency up to 15.28 g/g and 98% and still has good oil adsorption capacity (11.54 g/g) and efficiency (94.6%) after 20 cycles of adsorption. Therefore, the prepared micro oil-absorbing device has promising application prospects in oil-water separation, oil spill cleanup, etc. Environmental Implication This study demonstrates a facile electrochemical approach to prepare a miniature device for high-efficiency oil-water separation and oil spill collection and recovery. The modified copper mesh's separation flux could reach 32,330 L m −2 h −1 , showing great promise in oil-water separation and oil spill cleanup.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）