JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Ziteng Yang,Mingwei Zhao,Weiyu Bi,Yunlong Cheng,Zhenfeng Ma,Kaiwen Liu,Ying Li,Caili Dai
Slickwater has been extensively utilised in deep reservoir fracturing owing to its excellent drag reduction performance, and the polymer drag reducer is the core of slickwater. However, polymer drag reducers may degrade at high temperatures, which limits the application of slickwater in high temperature reservoirs. To increase the temperature resistance of slickwater, a novel temperature-resistant polymer drag reducer was chemically synthesised through free-radical polymerisation using acrylamide (AM), acrylic acid (AA), 2-acrylamide-2-methylpropyl sulfonic acid (AMPS) and N,N-dimethylacrylamide (DMAA). The introduction of temperature-resistant monomers substantially increased the thermal stability of the drag reducer. The rheological measurements revealed that the aqueous polymer solution was a pseudoplastic fluid with good viscoelasticity and thickening properties. At 110 °C, the drag reduction rate of 0.03 wt% polymer aqueous solution could reach 72.57 %, and the drag reduction retention rate was 96.69 % when compared with that at 25 °C. The drag reduction performance was evaluated in relation to displacement, concentration, temperature, pipe diameter, and salinity. Simultaneously, the proportion of factors influencing the drag reduction performance was analysed. Finally, a drag reduction mechanism was proposed. This study is expected to extend the application of slickwater in high-temperature reservoir development.
研究领域:
石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 48
·48362
·
IF 2.188
Xianwu Jing,Youquan Liu,Wei Li,Yuan Xu,Zhiyu Huang
A water-miscible nonionic surfmer (AC-TX100) was synthesized based on Triton X-100 and acryloyl chloride. Then, a terpolymer P(AM/AA/AC-TX100) was synthesized by free radical polymerization in aqueous solution and intended to be used as drag reducing agent (DRA). The DRA was defined to be P(AM 87.32 /AA 12.46 /AC-TX100 0.22 ) according to 1 H NMR and elemental analysis, the molecular weight was 2.12 × 10 6 g/mol according to scattering method. DRA shows excellent performance in drag reduction (DR). The highest DR rate of 76% can be obtained when DRA concentration is 0.023% in fresh water; while in brine containing 3% NaCl, DR rate decreases, and it is necessary to increase the concentration to 0.05% to ensure that DR rate is higher than 70%. SEM and cryo-TEM show that DRA forms a network structure in aqueous solution, and the tightness of this structure has a direct influence on DR performance. Specifically, DRA molecules stretch into the whirlpools generated by water at high flow rates, reducing the quantity and intensity of whirlpools, thereby lowering the energy loss and the friction. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48362.
研究领域:
高分子化学
·
流体力学
✓ 已验证
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 4
·955
·
IF 3.426
Hongzhong Tan,Jincheng Mao,Wenlong Zhang,Bo Yang,Xiaojiang Yang,Yang Zhang,Chong Lin,Jianfa Feng,Hao Zhang
Three kinds of drag reducer were synthesized by inverse emulsion polymerization and named PHWAM-1, PHWAM-2, and PHWAM-3. Drag reduction (DR) tests showed that the three drag reducers have different DR characteristics in fresh water and various saline waters because of their different types of hydrophobic monomers. PHWAM-1, without hydrophobic monomers, performs better in fresh water, while PHWAM-2 and PHWAM-3, with hydrophobic monomers, perform better in brine. In addition, PHWAM-3, which has twin-tailed hydrophobic monomers, performs best in high-concentration brine. Measurements of micro-particle size and observations of spatial structure suggest that although the stronger hydrophobic polymer has no DR advantage over a linear polymer in fresh water, the molecular chains form a mutually associative supporting structure that improves the DR performance over that of a linear polymer in high-concentration brine.Keywords:hydrophobic associating polymer;drag reducer;salt tolerance
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2025
·
IF 2
Li Peining,Wang Shouren,Xiao Zhen,Li Yang,Zhang Luyu,Wang Gaoqi
Underwater vehicles can conduct underwater exploration and military rescue operations and play a significant role in marine economic development and national defense. The fluid resistance control and corrosion resistance of underwater vehicles are essential indexes for evaluating the performance of underwater vehicles in particular marine environments and harsh conditions. The 7075 aluminum alloy, widely used in spacecraft shells, was selected as the material. We prepared a drag-reduction and robust surface based on shark skin by laser-ablation and plasma electrolytic oxidation. Then, the surface free energy was further modified by chemical modification. The ceramic coating exhibited superhydrophobicity with a water contact angle of 155.6° and roll-off angle (RA) of 5.5°. Compared with Bare Al, the corrosion current density of the superhydrophobic ceramic coating was reduced by 4 orders of magnitude since ZnO-NPs could notably enhance the corrosion resistance of Al alloys. Moreover, due to the protective effect of the ceramic coating and microstructure, the superhydrophobic coating exhibited excellent mechanical durability. Based on numerical simulation, the drag reduction effect of biomimetic microstructure under different Reynolds numbers was investigated. The experimental results indicated that biomimetic microstructure demonstrated notable drag reduction capabilities compared to smooth surfaces, stabilizing at approximately 28% during laminar flow states. Thus, applying this coating method to the underwater vehicle shell was expected to reduce the fluid resistance and extend the operational lifespan in the marine corrosive environment.
研究领域:
材料科学
·
海洋工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2017
·
IF 2.589
Mengjiao Zhai,Yongfeng Gong,Xiuyong Chen,Tonghu Xiao,Guoping Zhang,Lianghao Xu,Hua Li
To exploit marine metal materials with antifouling and drag reduction properties, we constructed hydrophobic perfluoroalkoxy (PFA)/nano‑silver (Ag) coatings onto aluminum substrates by suspension flame spray deposition of PFA/AgNO 3 composites. Silver nanoparticles were formed in situ within PFA coating during the suspension flame spraying. The successful construction of PFA/nano-Ag coatings was revealed by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and contact angle measurements, respectively. The additional silver nanoparticles play the significant role in regulating the sliding angle of the PFA-based coatings. The silver nanoparticles-loaded hydrophobic PFA coatings synergistically inhibited the adhesion of bacteria, while only PFA coatings with lower content of silver display drag reduction property. The simple and cost-effective approach is of great promise in mass-production of antifoulant-loaded hydrophobic coatings on general substrates for potential antifouling and drag reduction applications.
研究领域:
材料科学
·
海洋工程
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2020
·Vol. 17
·期 6
·1717-1725
·
IF 2.096
Wu Yi-Ning,Li Yuan,Cao Meng-Jiao,Dai Cai-Li,He Long,Yang Yu-Ping
During the development of low or ultra-low permeability oil resources, the alternative energy supply becomes a prominent issue. In recent years, carbon dots (CDs) have drawn much attention owing to their application potential in oil fields for reducing injection pressure and augmenting oil recovery. However, carbon dots characterized of small size, high surface energy are faced with several challenges, such as self-aggregation and settling. The preparation of stably dispersed carbon dots nanofluids is the key factor to guarantee its application performance in formation. In this work, we investigated the stability of hydrophilic carbon dots (HICDs) and hydrophobic carbon dots–Tween 80 (HOCDs) nanofluids. The influences of carbon dots concentration, sorts and concentration of salt ions as well as temperature on the stability of CDs were studied. The results showed that HICDs are more sensitive to sort and concentration of salt ions, while HOCDs are more sensitive to temperature. In addition, the core flooding experiments demonstrated that the pressure reduction rate of HICDs and HOCDs nanofluids can be as high as 17.88% and 26.14%, respectively. Hence, the HICDs and HOCDs nanofluids show a good application potential in the reduction of injection pressure during the development of low and ultra-low permeability oil resources.
研究领域:
石油工程
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Deke Li,Zhiguang Guo
Superhydrophobic layers are extremely essential for protecting material surface in various applications. In this study, a stable superhydrophobic mixed matrix surface with a 152.2° contact angle can be fabricated through the technology of layer-by-layer hot-pressing (HoP), and then modified by 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFOTES) on the ZIF-8@Kevlar fabric surface. The morphology and chemical composition were analyzed by the means of SEM, XRD and FTIR. The obtained superhydrophobic coatings showed excellent antiwear performance and drag reduction under desired working conditions. Moreover, we successfully applied superhydrophobic F-ZIF-8@Kevlar fabric in the alcohol adsorbent with high removal capacity, and it can be reused for several times without serious efficiency loss.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Xuan Jiao,Binrui Wu,Jiahao Li,Yuanyuan Yang,Wancheng Gu,Feiyan Fu
Developing highly durable coatings, endowing comprehensive protection capabilities of antifouling, drag reduction, and corrosion resistance in underwater settings, holds paramount significance for modern maritime undertakings. However, the inferior multifunctional compatibility and weak structural strength have proven to pose an extremely formidable challenge. Herein, this study reports an internally self-sliding coating that imparts liquid-repellence and ion permeation resistance without the necessity of a complex fabrication process. The key lies in combining integrated structure-function strategy with particle close-packing method of fluorine-grafted layered silicate particles. These particles demonstrate and exhibit a unique self-sliding property due to the weak van der Waals forces between the lamellae from the typical layered crystal structure. The durability and underwater protection of these coatings are clearly demonstrated by their outstanding mechanical wear resistance, a drag reduction efficiency of up to 25%, and the capacity to remain corrosion-free in saltwater for over 1000 h. Owing to the slippery frictional action and the closely packed surface microstructure, the coating demonstrates outstanding long-term stability and anti-permeability properties. This strategy offers a universal design framework for engineering ultra-durable coatings applicable to a diverse range of underwater comprehensive protection applications.
研究领域:
材料科学
·
海洋工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 1.9
Qianqian Lv,Chuanshuo Wang,Xiaoxuan Xu,Xiaofang Lv,Wen Xia,Jinru Shang,Aokai Qin,Qianli Ma,Yang Liu,Shidong Zhou,Jimiao Duan
Drag reducers have become a common method for reducing resistance and increasing transportation efficiency in pipeline transportation of waxy crude oil. The prominent heat transfer weakening effect of drag reducers may impact the deposition of waxy oil. This study uses cold finger experiments to clarify wax deposition characteristics and mechanisms in drag-reduced waxy oil. The wax deposition mass and components are examined under different temperatures, stirring rates, drag reducer dosages, and types. The results show that a low dosage of drag reducer at high stirring rates can simultaneously reduce the total wax deposition and the overall wax content in high waxy oil. 5 mg/kg drag reducer can reduce total wax deposition by up to 15.66% and overall wax content by 7.26%. A systematic investigation reveals that adding drag reducers changes the carbon number distribution in the wax deposition layer. This change is similar to the effect of increasing wall temperature. The heat insulation and transfer weakening effects of drag-reducing fluids are likely the main mechanisms inhibiting the increase in wax deposition mass and wax content. The heat insulation effect reduces the temperature gradient near the pipe wall, while the transfer weakening effect decreases radial heat transfer. However, under low stirring rates and high dosages, the deposition mass of the drag-reduced waxy oil system increases, with the adhesive effect of polymer-type drag reducers becoming more pronounced. These findings provide a foundation for optimizing drag reducer usage in waxy crude oil pipelines, potentially leading to significant energy savings and improved operational efficiency.
研究领域:
石油工程
·
化学工程
·
流体力学
·
传热学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Marine Science and Engineering
·
2023
·Vol. 11
·期 3
·520
·
IF 2.9
Jingguo Fu,Yihe Sun,Jingye Wang,Hongpeng Zhang,Jifeng Zhang,Yulong Ji
A fluorine-free cerium palmitate superhydrophobic surface on an aluminum plate was fabricated via a two-step electrodeposition method. The mechanical durability, anti-corrosion performance, water repellency and drag reduction properties were tested. The results indicate that a superhydrophobic surface with a densely packed convex island shape with micro-pores and nano-scale strips was formed on the aluminum plate. Furthermore, the as-prepared surface exhibits excellent water-repelling ability with a water contact angle of 162.3° and a sliding angle of 1.5°. Owing to the protective effect of the convex island structure on the surface, the surface also shows superb mechanical durability, which is a shortcoming of ordinary electrodeposited surfaces. Moreover, compared with bare aluminum, the corrosion inhibition efficiency of the superhydrophobic surface is 99.55% and the surface drag decreases by 65.3% at a lower flow rate. Therefore, it is believed that the environmentally friendly fluorine-free superhydrophobic surface has promising potential applications in marine engineering.Keywords:superhydrophobic surface;electrodeposition;SiC particles;corrosion resistance;drag reduction
研究领域:
材料科学
·
海洋工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yuanting Deng,Zihao Li,Zuozhu Yin,Yuhua Chen,Chenggang Yang,Yidan Luo,Mingshan Xue
Through the reasonable design of the microstructure of superhydrophobic coatings, the solid-liquid contact area between the substrate and the liquid can be reduced, the penetration of corrosive medium into the liquid can be reduced, and the flow resistance can be lowered. In this paper, a bionic superhydrophobic composite coating of aluminum matrix material was prepared by the spraying method using KH550 coupling agent-modified silica (KH550@SiO 2 ) and stearic acid-modified titanium dioxide (STA@TiO 2 ) mixed with waterborne polyurethane . The performance was tested by water contact angle , drag reduction measurements, and electrochemical analysis . The composite coating has a droplet contact angle of 163.4° and a rolling angle of 4° and is extremely wettable. The synergistic effect of the air layer and coating densities resulted in excellent corrosion inhibition efficiency of the coating in a 3.5 wt % NaCl solution. In addition, the composite-coated spheres can form a continuous air cavity during water ingress, which is essential for extending the drag reduction capability of the coating in liquids. The design and preparation of superhydrophobic composite coatings have promising applications in large-area corrosion protection and voyage damping of metals.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Friction
·
2023
·Vol. 11
·期 5
·716-736
·
IF 6.8
Xin Lei,Li Hao,Gao Jian,Wang Zhongwei,Zhou KaiJie,Yu Sirong
It is still a challenge to achieve large-area preparation of robust superhydrophobic surfaces with strong mechanical stability. Here, a simple and low-cost method to prepare robust decoupling superhydrophobic coatings on aluminum (Al) alloys substrate has been presented. The superhydrophobicity and robustness of decoupling coatings are realized by structuring surfaces at two different length scales, with nanostructures for superhydrophobicity and microstructures for robustness. This prepared decoupling coating shows promising superhydrophobicity, with water contact angle (CA) of ∼158.4° and roll off angle (RA) of ∼3°. It also exhibits high repellency for impacting water droplets. Notably, the decoupling coating processes outstanding adhesion strength on the substrate after tape-peeling and cross-cut tests, also with promising wear resistantance after sandpaper abrasion and wear test. The friction coefficient of this decoupling coating is only ∼0.2. In addition, the robust decoupling superhydrophobic coating is applied to underwater buoyancy enhancement and fluid resistance reduction (drag reduction rate ∼30.09%). This decoupling superhydrophobic coating also displays promising self-cleaning and antifouling properties. Moreover, benefitting from the photocatalytic property of TiO 2 , this decoupling coating is also exploited for degrading organics to achieve seawater purification. This obtained decoupling superhydrophobic coating is expected to apply on other solids in marine fields, and the simple and eco-friendly method develops the potential practical application.
研究领域:
材料科学
·
环境科学
·
表面工程
✓ 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）