SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jiacheng Yu,Changqian Cao,Shuo Liu,Yongxin Pan
The green remediation of crude oil spills is a global concern due to the high viscosity and low fluidity of such oil. Sorbents with heating functions are promising candidates for reducing the viscosity of crude oil and accelerating its cleanup. Herein, we introduce an eco-friendly sponge with the dual functionality of magnetic and photothermal heating for the rapid recovery of heavy oil spills with very high viscosity. The magneto-photothermal sponge was fabricated by the facile dip-coating of magnetoferritin (MPfFn) nanoparticles, polydopamine (PDA), and polydimethylsiloxane (PDMS) on a melamine sponge (MS). The resulting PDMS-MPfFn-MS exhibited excellent hydrophobicity and adequate flame-retardancy. Owing to the electromagnetic–thermal and photothermal conversion properties of the MPfFn/PDA coating, the surface of the functionalized sponge could be rapidly heated to 112.5 °C under alternating magnetic field ( f = 502.05 kHz, H = 10.5 kA m −1 ) or 81.9 °C under light illumination (1 kW m −2 ). The fast and continuous recovery of extremely highly viscous oil was realized by a combination of solar and magnetic heating with a vacuum pump, and the recovery rate reached 50.6 g h −1 cm −2 . The proposed approach integrates the safety and temperature controllability of magnetic heating and the energy-saving feature of solar heating, thereby serving as a new solution for addressing viscous crude oil spills.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Jun-Xiang Xiang,Ze Liu
Understanding and controlling the flow of materials confined in channels play important roles in science and engineering. The general no-slip boundary condition will result in it being more challenging to drive the flow as the channel size decreases to the nanoscale, especially for highly viscous liquids. Here, we report the observation of a large boundary slip in the nanoscale flow of highly viscous supercooled liquid metals (with viscosities of ≲108 Pa s), enabled by the hydrophobic treatment of smooth nanochannels. The slip length significantly depends on the pressure, which can be rationalized by the shear-dependent viscosity. Our findings provide not only new insights into the field of nanofluidics but also a practical technique for resolving the challenge in the net formation of highly viscous supercooled liquid metals at the nanoscale.
研究领域:
纳米流体力学
·
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 18
·3702
·
IF 5
Shiwei Shi,Zeshan Abbas,Xiangyu Zhao,Junsheng Liang,Dazhi Wang
To increase the printing stability of low-viscosity solutions, an auxiliary method was proposed using a coaxial electrohydrodynamic jet. A high-viscosity solution was employed as the outer layer in the printing process, and it could be removed (dissolved away) after printing the structures. A combination of mechanical and electrical forces was proposed to enhance the consistency, durability, and alignment of the printed versatile structures. The instability of the jet trajectory (which arose from the repulsion between the jet and the base with a residual charge, in addition to the winding effect of the solution) was also reduced using the drag force along the direction of movement. Moreover, the jet velocity, the surface charge, and the influence of various working voltages on the jet speed were simulated. An array of IDT-BT nanostructures measuring about 100 nm was prepared on silicon dioxide (using an inner needle with a diameter of 130 µm) by equating the moving speed (350 mm/s) of the substrate to the speed of the jet. Moreover, the moving speed (350 mm/s) of the substrate was compared exclusively to the speed of the jet. The method proposed throughout this study can provide a reference for enhancing the stability of low-viscosity solutions on substrates for high-efficiency fabrication devices (NEMS/MEMS).Keywords:CE-jet morphology;phase field model;drag;multiphysics;silicon dioxide;high-viscosity solution
研究领域:
纳米技术
·
材料科学
·
微机电系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zhuqing Wang,Yiyang Li,Yupu Meng,Zhiwei Huang,Min Wang
This research employed a simplistic approach to modify polydimethylsiloxane (PDMS) and graphene oxide (GO) onto the surface of the PU skeleton, and then synthesize an oil–water separation material (rGO@PDMS/PU) with photothermal conversion performance and superoleophilic/superhydrophobic properties through high-temperature reduction. The synthesized rGO@PDMS/PU can adsorb organic solvents or oil that are 19–37 times its own weight, while also having a 99.1% oil–water separation efficiency. Additionally, rGO@PDMS/PU also has good photothermal conversion ability. Under the intensity of 1 sunlight ( q = 1 kW m −2 ), its surface temperature can reach 95.4°C within 10 s. Relying on the excellent oil–water selectivity and photothermal conversion capabilities of rGO@PDMS/PU, we also build a novel oil-gathering device that can successfully make oil recovery on the water surface in situ. When the device is under light conditions, its crude oil recovery efficiency is nearly four times higher than when there is no light. Therefore, this new oil-gathering device has broad application prospects in high-viscosity oil leakage incidents such as crude oil and engine oil.
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
LAB ON A CHIP
·
2019
·Vol. 19
·期 11
·1953-1960
·
IF 6.914
Jingmei Li,Tiantian Kong,Jiazuo Yu,Kit Hang Lee,Yuk Heng Tang,Ka-Wai Kwok,Ji Tae Kim,Ho Cheung Shum
The rope coiling observed in liquid ink with high viscosity has been exploited in additive printing to fabricate architectures with periodically curled structures and tune their mechanical properties. However, the control over the coiling path relying on mechanical motion restricts the spatiotemporal resolution. We develop an electrically assisted high-resolution technique to manipulate coiling paths of viscous ink and structures of the deposited filament. By spatially programming the voltage applied onto the viscous ink, we show that the switching between different filament structures can be accomplished at single wavelength resolution, facilitating the rapid and accurate construction of sophisticated patterns. Furthermore, translational guiding of the electrocoiling enables rapid printing of filaments with complex structures at a line speed of 102 mm s−1. With a simplified trajectory of the printing head, large-area and multiscale patterns can be printed at an unprecedented speed; for instance, centimeter-sized architectures constructed from nanofibers with micron-sized curled structures can be completed in a few minutes. By enabling the printing of complex fiber networks with tunable shape and density, our work provides a route towards custom-design of fiber architectures with unique features such as spatially varying mechanical properties.
研究领域:
材料科学
·
制造工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Zhuobin Wu,Ke Zheng,Zuqin Cheng,Shaoqi Zhou
Industrialization releases many high-viscosity oil pollutants into the environment, requiring a hydrophobic recyclable oil-absorbing material. Therefore, a self-heating and superhydrophobic melamine sponge (MS) by connecting polydimethylsiloxane (PDMS) was coated with functionalized molybdenum disulfide (MoS2) nanosheets on a three-dimensional microstructure of a commercial MS (MoS2/PDMS/MS) via a simple and low-cost dip-coating method. The prepared sponge showed a water contact angle of 151.8°, indicating that the modified sponge exhibited superhydrophobicity. Due to the addition of MoS2, the modified sponge can convert light into heat, and its surface could be heated to 59.7 °C within 30 s. Because of the excellent MoS2/PDMS/MS photothermal performance, the sponge could decrease the viscosity of the high-viscosity oil, absorbing the high-viscosity oil efficiently. After simultaneous thermal analysis and repeated compression tests, the modified sponge exhibited high thermochemical stability, mechanical property, and reusability. This superhydrophobic multifunctional sponge shows excellent potential for high-viscosity oil absorption.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jiehui Li,Yaxin Wu,Jinmei He,Qinghua Liu,Xiaofeng Liu,Hui Liu,Yuyu Xue,Leihuan Mu,Mengnan Qu
Developing functional adsorption materials that efficiently adsorb high viscosity oil is crucial for solving oil spill accidents. Herein, low-density three-dimensional porous melamine sponge was used as the modified substrate. First, phytic acid is selected for modification to make it flame retardant. Then, polypyrrole (PPy) and hexadecyltrimethoxysilane (HDTMS) are modified on its surface through low-temperature polymerization and impregnation, ultimately obtaining a multifunctional durable superhydrophobic PA/PPy/HDTMS@MF (melamine foam) sponges with photo/electro-thermal effects and flame retardant. When the applied voltage is 10 V, the core temperature on the PA/PPy/HDTMS@MF sponge’s surface rapidly increases from 26.4 °C to 134.6 °C within 80 s, and the sponge will not burn and be damaged. Under the irradiation of one sunlight (1 kW/m 2 ), the surface core temperature can rapidly rise from 26.4 °C to 93 °C within 70 s. The superhydrophobic PA/PPy/HDTMS@MF sponge can all-weather absorb kinds of high viscosity crude oil and solid oils that are 18–27 times than its own mass, indicating that the prepared superhydrophobic sponge has excellent oil collection performance. And under one sunlight (1 kW/m 2 ), after 10 cycles of desorption, the prepared superhydrophobic sponge can still absorb 26 times more crude oil than its own weight. In addition, PA/PPy/HDTMS@MF sponge also has the characteristic of photothermal defrosting and deicing, and the ice on its surface can begin to melt within 5 min under one sunlight (1 kW/m 2 ). The melted water will not enter the inside of the sponge, effectively ensuring the utilization efficiency of photothermal effects. Based on the above advantages, the prepared photo/electro thermal conversion superhydrophobic sponge has excellent development prospects in the field of high viscosity oil adsorption and photothermal defrosting/deicing.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Weijia Zhang,Jinghan Zhang,Xinyi Ma,Changhua Li,Bihe Yuan
Frequent oil spills have caused severe environmental pollution and ecological issues. Conventional adsorption materials are attractive candidates for oil spills, but their effectiveness is hindered primarily by certain high-viscosity oils. In this work, we fabricated a bio-based aerogel which is composed of sodium alginate and polyaniline-modified attapulgite, with photothermal conversion and water repellency (water contact angle > 138°) via freeze-drying and hydrophobic modification with polydimethylsiloxane . The composite aerogel has strong chemical stability, with a maximum absorption capacity of 32 g/g. Furthermore, the aerogel exhibits exceptional photothermal performance, achieving a surface temperature increase to 85 °C within 3 min under 1.0 sun irradiation. This capability reduces silicone oil absorption time from 4 to 1 min, conserving 75% of absorption time and reaching a silicone oil absorption capacity of 21 g/g. The separation efficiency of the aerogel for emulsions is also satisfactory, which greatly broadens its application range. The preparation of solar heated aerogels provides a potential solution for exploring biomass materials to solve the problem of oil spill recovery on a large scale.
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
Yuhan Liu,Bin Li,Yihao Guan,Limei Dong,Bingfeng Li,Wenjun Zhang,Mutai Bao,Yiming Li
Rapid and efficient recovery of crude oil spill is still a great challenge because of its high viscosity and limited flowability at ambient temperature. Given this dilemma, we propose a simple and fast crude oil remediation solution by loading green, low-cost and scalable superhydrophobic fiber felt onto the shipborne oil recovery device, which enables the whole process from crude oil adsorption to recovery. This fiber felt (FF) is prepared based on inexpensive and readily available softwood pulp, and then the adsorbent is endowed with excellent photo/electrical-thermal conversion properties through simple in-situ growth of polypyrrole (PPy). Its surface temperature can rapidly reach 65 °C under 1 kW·m −2 light intensity and 93 °C under the low voltage of 8 V, which makes it high-efficiency in oil spill cleanup under sunlight/low-voltage input. Importantly, combined with COMSOL simulations, the flow behavior of crude oil in the real pore channels of the material is thoroughly investigated, revealing the flow rate distribution and diffusion characteristics of crude oil in the pore channels under different thermal response conditions, which offers a theoretical basis for the adsorption of crude oil. This study integrates the easily prepared fiber felt, which has excellent oil adsorption property, with shipborne oil recovery device, solving the problem of traditional adsorbents being difficult to realize large-scale application due to complex preparation and the lack of supporting devices, and providing an efficient emergency solution for high-viscosity oil spill pollution.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qing Wang,Fujian Zhou,Hang Su,Siyu Zhang,Rencheng Dong,Dandan Yang,Yunjin Wang,Zhangxin Chen,Junjian Li
A suitable pad fluid system creates a fracture surface with heterogeneous etching, reducing oil and gas flow resistance and improving the acid fracturing efficiency. The superior viscosity and friction reduction characteristics of a high-viscosity friction reducer have gradually replaced conventional slickwater and guar gum fracturing fluid. This study introduces nanoemulsions into a high-viscosity friction reducer, forming a nano high-viscosity friction reducer system resistant to acids and salts. Including nanoemulsions improves its viscosity, friction reduction rate, and imbibition oil recovery. Experimental results show that hydrophilic groups in nanoemulsions form hydrogen bonds with those in the high-viscosity friction reducer, increasing its viscosity by about 10% and enhancing its friction reduction performance by approximately 1.08 times under high flow rates. After breaking a gel, the nano high-viscosity friction reducer system has a core permeability damage rate of 19.66%, higher than conventional slickwater but significantly lower than guar gum breaking fluid. Under reacted acid conditions, an addition of nanoemulsions can transform oil-wet cores into water-wet ones, altering the direction of capillary forces and providing a driving force for imbibition oil recovery, with an imbibition recovery rate as high as 24.89%, 17.38% higher than a group without nanoemulsions. The ability of nanoemulsions to mobilize oil in both micro and macro pores indicates a substantial potential in utilizing fracturing fluid energy to displace oil for enhanced recovery. This study suggests that the nano high-viscosity friction reducers system can not only improve properties such as its viscosity and friction reduction rate, minimizing polymer invasion damage to a formation but also supplement formation energy and displace crude oil through imbibition, thereby achieving an integrated and efficient acid fracturing stimulation and enhanced oil recovery.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Lubrication Science
·
2022
·Vol. 34
·期 8
·527-536
·
IF 1.307
Jingze Cui,Qiong Tang,Chen Chen,Hong Xu,Lei Liu,Jinxiang Dong
Producing lubricating base oils from coal-based chemicals is an alternative route for replacing the conventional petro-based lubricants. Herein, we firstly reported the synthesis of high-viscosity polyalkylphenanthrene oils derived from the coal-based chemicals (phenanthrene, C6/C8-olefins) by alkylation with acidic ionic liquid (Et 3 NHCl∙2AlCl 3 ) as catalyst. Their primary physicochemical properties were studied in detail to reveal their structure–property relationships, the existence of the phenanthrene ring in their molecular structure led to some good property, such as high-kinematic viscosity (12.6–30.2 mm 2 ·s −1 at 100°C), better flash point (>230°C), high-oxidative onset time (>230°C) and good polarity. Moreover, the tribological performances of the synthetic oils and the commercial PAO-20 lubricating base oil were studied for comparison, these alkylated phenanthrenes, especially PHP-3 and POP-3, exhibited much higher load-carrying capacity, reducing friction and anti-wear property than that observed on PAO-20.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Additive Manufacturing
·
2023
·
IF 11
Chaochao Sun,Jiaqi Chen,Shuhao Yan,Damei Jiang,Xiangcheng Chu,Songmei Yuan
3D printing piezoelectric ceramic has provided solutions for personalized electronic devices due to the capability of fabricating intricate 3D structures. However, as the ceramic powder size decreases and solid content increases, 3D printing technology encounters limitations due to the high viscosity, long exposure times, and heavy scattering of the ceramic slurry . In this study, a new piezoelectric-pneumatic micro-jet (PPMJ) printing method with a wide viscosity range based on barium titanate (BTO) slurry is proposed. BTO slurry with 100 nm particle size is optimized for homogeneity and printability. The effects of dispersant types on slurry are studied and the optimal concentration of the dispersant is determined. Based on PPMJ printing, BTO slurry of 50 vol % with a viscosity of 383,135mPa·s can be printed with a 0.2 mm diameter printhead nozzle. After post-processing, the density can reach 5.7 ± 0.023 g/cm 3 and it is as same as dry pressing pellets, which is 95 ± 0.4 % of the empirical value. The printed ceramic exhibits excellent dielectric properties ( ε r = 572.7 ± 1.1 and tan δ = 0.0362 ± 0.0001 at 1KHz) and piezoelectric property ( d 33 = 133 ± 1.3 ). The results indicate that PPMJ is a promising 3D printing technology to fabricate piezoelectric materials with high solid content and complex geometries for the applications of ceramic components.
研究领域:
材料科学
·
陶瓷
·
增材制造
·
电子学
✓ 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）