FIBERS AND POLYMERS
·
2021
·Vol. 23
·期 2
·396-403
·
IF 2.153
Meng Xu,Dong Yanyan,Arias Manuel J. Lis,Mu Song,Liang Liping
For the actual courses of surroundings conservation, segregation of oily water mixtures is increasingly desired. The hydrophobic/oleophilic cotton fabric as a system for removing oil from a water phase was prepared by reversible addition fragmentation chain transfer (RAFT) reaction technology. A piece of fabric was modified with the RAFT chain transfer agent S-1-Dodecyl-S′-(α′,α″-dimethyl-α″-acetic acid) trithiocarbonate (CTA), then hydrophobic/oleophilic interface was fabricated on the CTA modified fabric by grafting the octadecyl methacrylate. The chemical structures, surface topographies and surface properties were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and contact angle experiments, respectively. The ability of as-prepared fabric with a separation efficiency was better than 97.0 % on average for various types of oil/water mixtures demonstrated the hydrophobic/oleophilic property. We believe that the work will extend the applications of fabric in the oil/water separation and provide a new design in practical applications.
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
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xufei Li,Baoyou Yan,Weiqiu Huang,Hui Bian,Xinya Wang,Jiahui Zhu,Shaocan Dong,Yuyu Wang,Weihua Chen
To overcome the shortage of conventional synthetic methods, such as long reaction time at high temperature and pressure (HTP) or poor performance at room temperature and pressure (RTP), a facile and economical strategy was employed to prepare high-performance ZIF-90 for the first time at RTP only by adding triethylamine (TEA). Herein, we successfully prepared ZIF-90 nanocrystals by a two-step stirring method within several minutes (5–30 min) and their structure parameters (e.g., BET surface areas, 916–1235 m 2 ·g −1 ) were also tuned simultaneously, which were much better than reported samples prepared at RTP. Afterwards, by changing functional ligands, hydrophobic ZIF-90-CF 3 with low surface energy was also designed. With the ligand side of aldehyde (–CHO) and trifluoromethyl (-CF 3 ) groups on ZIF-90 and ZIF-90-CF 3 , the water vapor uptakes and adsorption heats decreased from 7.9 to 0.79 mmol·g −1 and 20.6 to 2.6 kJ·mmol −1 , respectively. Additionally, a shaped ZIF-90-CF 3 /melamine foam (MF) composite with both hydrophobic and oleophilic properties exhibited extraordinary organic compounds (OCs)-water separation ability, including a high adsorption capacity (40.1–108.7 g‧g −1 ) towards various OCs. Furthermore, owing to its excellent compressibility and mechanical stability, the ZIF-90-CF 3 /MF composite can be regenerated by slightly squeezing the adsorbed OCs, indicating the potential for possible commercialisation of the derived MOF/MF composites for the efficient purification of 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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 37
·e54408
·
IF 3
Yue Sun,Jiaojiao Bai,Zhe Wang,Huabin Li,Hua Dong
A cellulose aerogel with very low overall density is fabricated by freeze-drying aqueous cellulose solution. A hydrophobic/oleophilic cellulose aerogel is further fabricated by coating the cellulose aerogel with hexyltrimethoxysilane-modified SiO 2 nanoparticles. The features of the developed hydrophobic/oleophilic cellulose aerogel are characterized with density and porosity measurement, infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and contact angle measurement. Finally, the oil absorption performance of the developed hydrophobic/oleophilic cellulose aerogel is investigated. The results show that SiO 2 nanoparticles have been successfully loaded on the surface of the aerogel backbone after fulfillment of fabrication, and the surface of the aerogel turns to be hydrophobic/oleophilic (water contact angle 131° and oil contact angle 0°). The oil absorption experiment results show that the absorption capacity for organic solvents is from 10 to 21 times the initial aerogel weight, depending on the density of the absorbed organic solvents. In addition, the aerogel still maintains good stability in high temperature, strong acid or strong base conditions. Furthermore, the aerogel also shows good performance in separating oil from oil–water mixtures. This hydrophobic/oleophilic cellulose aerogel can be a promising choice for remedying water pollution caused by oil contamination.
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
Polymers
·
2019
·Vol. 11
·期 12
·2072
·
IF 3.164
Liping Liang,Yanyan Dong,Yuqing Liu,Xu Meng
A polyurethane (PU) sponge with hydrophobic/oleophilic property was prepared based on the thiol–ene click reaction, which was a simple method with only one step. Photopolymerization was induced through UV light on the sponge surface in a homogeneous solution containing polyethylene glycol diacrylate, pentaerythritol (mercaptoacetic acid) ester, 2-hydroxy-4′-(2-hydroxyethoxy)-2-methylpropiophenone, and octadecyl methacrylate. The as-prepared sponge possessed excellent selective for oil from various types of oil/water mixtures. It also had a high absorption capacity for toluene, >21 times its self-weight, and it had about 20 times its self-weight for vegetable oil, even after five extrusion–adsorption cycles, presenting a good recyclability. It created a new method to prepare oil/water separation sponge.Keywords:PU sponge;functional;pollution technology;oil/water separation
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 7
·2745-2755
·
IF 6.233
Jinyou Lin,Feng Tian,Yanwei Shang,Fujun Wang,Bin Ding,Jianyong Yu,Zhi Guo
The pollution arising from oil spills is a matter of great concern due to its damaging impacts on the ecological environment, which has created a tremendous need to find more efficient materials for oil spill cleanup. In this work, we reported a sorbent for oil soak-up from a water surface with a high sorption capacity, good selectivity, and excellent reusability based on the hydrophobic–oleophilic fibrous mats that were fabricated via co-axial electrospinning polystyrene (PS) solution as the shell solution and polyurethane (PU) solution as the core solution. The fine structures of as-prepared fibers were regulated by manipulating the spinning voltages, core solution concentrations, and solvent compositions in shell solutions, which were also characterized by field emission scanning electron microscopy, transmission electron microscopy, nitrogen adsorption method, and synchrotron radiation small-angle X-ray scattering. The effects of inter-fiber voids and intra-fiber porosity on oil sorption capacities were well studied. A comparison of oil sorption capacity for the single fiber with different porous structures was also investigated with the help of scanning transmission X-ray microscopy. The results showed that the sorption capacities of the as-prepared sorbent with regards to motor oil and sunflower seed oil can be 64.40 and 47.48 g g−1, respectively, approximately 2–3 times that of conventional polypropylene (PP) fibers for these two same oils. Even after five sorption cycles, a comparable oil sorption capacity with PP fibers was still maintained, exhibiting an excellent reusability. We believe that the composite PS–PU fibrous mats have a great potential application in wastewater treatment, oil accident remediation and environmental protection.
研究领域:
环境科学
·
材料科学
·
高分子科学
·
纳米技术
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污染治理
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资源回收
·
表面科学
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 3
·528-534
·
IF 1.307
Yu Ruomeng,Shi Yongzheng,Yang Dongzhi
M icro-size oil adsorbents are effective for the rapid remediation of special oil spills. Here, N-doped reduced graphene oxide(RGO) microspheres( ca. 150 µm in diameter) with a local radially aligned and porous structure are fabricated by combining electrospray-freeze-drying with thermal treatment for rapid separation of oil-water. Owing to its hydrophobic/oleophilic properties and oriented structure, the N-doped RGO microspheres achieve high capacities and fast adsorption rates for a variety of oils and organic solvents. Furthermore, excellent oil-water separation performance on floating oil/oil-water emulsions and stable cyclic adsorption capacities are obtained for the local radially aligned and porous microsphere. Therefore, N-doped RGO microspheres with the unique porous structure have the potential for the remediation of oily sewage and oil spills.
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
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Cai Long,Yongquan Qing,Kai An,Xiao Long,Chen Liu,Shuo Shang,Chuanning Yang,Changsheng Liu
Extreme wettability coatings with repellent-liquids have attracted considerable attention due to their various advantages. Such coatings are not only restricted by poor robustness, but it is difficult to achieve for controlled liquid transport and inhibiting liquid splash due to allowing the droplet to roll-off and bounce, limiting functional applications. Here, we developed two opposite extreme wettability coaitngs with a superhydrophobic-oleophilic coating (SC) and coexisting superoleophobic-superhydrophilic coating (CSC), by changing only the type of fluorination agent. These coatings have shown strong mechanical robustness under sandpaper abrasion, washing, finger-wipe, knife-scratch, and tape-peel due to the synergistic enhancement between native rosin and grafted nanoparticles. Surprisingly, the perfluorinated liquid-infused SC surface could achieve a smart interface for inhibiting splash and recovery of water droplets along with the five-pointed star/branch pattern. Besides, oil droplets could be transported controllable along the desired sinusoidal shape and letter “YOU” wetted path on the water-infused CSC surface by dynamic control. Undoubtedly, these can have a broad applicability spectrum in the micro-fluidics and precision industry.
研究领域:
材料科学
·
表面工程
·
涂层技术
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纳米技术
·
微流控
✓ 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）