Materia-Rio de Janeiro
·
2025
·
IF 1.2
Yu Meng,Xu Guorui,Li Liang,Zhou Jingjing,Tie Leilei,Zhang Bo,Ma Xiaofei,Feng Xuan,Yang Jinzhou,Wang Lei,Li Weizhi,Zheng Yufei,Wu Bao
VISUAL
研究领域:
石油工程
·
油田化学
·
提高采收率
·
油藏工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2018
·
IF 4.513
Hui-Bo Qin,Yi-Le Du,Yu Zhang,Xiao-Qin Wang,Zhen-Feng Sun,Chang-Yu Sun,Guang-Jin Chen,Lan-Ying Yang,Zhi Li
The toxicity of hydrate inhibitors used in the field has attracted more attention. A natural material, i.e. , whey protein, was assessed to act as kinetic hydrate inhibitors (KHIs) in a sapphire cell and an autoclave equipped with particle video microscope (PVM) and focused beam reflectance measurement (FBRM) probes. The pressure dropping method was utilized to estimate the hydrate induction time, and the results demonstrate that the hydrate inhibition performance of whey protein is superior to that of the commercial KHI, polyvinylpyrrolidone. The induction time for the pure water system was found to increase linearly with the increase in the dosage of whey protein until it reached approximately 2.5 wt%. As it is usually inevasible to apply KHIs under conditions of high water contents , the feasibility of whey protein as a KHI in the (oil + water) system with and without an emulsifier of Tween 20 was evaluated. A small amount of oil was found to have no obvious influence on the induction time for the system with whey protein under the circumstances without the addition of emulsifier. When Tween 20 was added, the induction time obviously increased under the same operating conditions, which could be attributed to the emulsifier–protein interactions in aqueous solutions. The oil drops decrease and are distributed more evenly with the increasing dosage of Tween 20 under the PVM and FBRM probes measurement. Additionally, the particles decrease during the hydrate formation process. This work presents a natural KHI and gives the inhibition discipline in a high-water-content system.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2023
·
IF 5.6
Xi-Dao Wu,Peng Xiao,Bei Liu,Guang-Jin Chen,Jian-Hua Pang
CO 2 emulsions used for EOR have received a lot of interest because of its good performance on CO 2 mobility reduction. However, most of them have been focusing on the high quality CO 2 emulsion (high CO 2 fraction), while CO 2 emulsion with high water cut has been rarely researched. In this paper, we carried out a comprehensive experimental study of using high water cut CO 2 /H 2 O emulsion for enhancing oil recovery. Firstly, a nonionic surfactant, alkyl glycosides (APG), was selected to stabilize CO 2 /H 2 O emulsion, and the corresponding morphology and stability were evaluated with a transparent PVT cell. Subsequently, plugging capacity and apparent viscosity of CO 2 /H 2 O emulsion were measured systematically by a sand pack displacement apparatus connected with a 1.95-m long capillary tube. Furthermore, a high water cut (40 vol%) CO 2 /H 2 O emulsion was selected for flooding experiments in a long sand pack and a core sample, and the oil recovery, the rate of oil recovery, and the pressure gradients were analyzed. The results indicated that APG had a good performance on emulsifying and stabilizing CO 2 emulsion. An inversion from H 2 O/CO 2 emulsion to CO 2 /H 2 O emulsion with the increase in water cut was confirmed. CO 2 /H 2 O emulsions with lower water cuts presented higher apparent viscosity, while the optimal plugging capacity of CO 2 /H 2 O emulsion occurred at a certain water cut. Eventually, the displacement using CO 2 /H 2 O emulsion provided 18.98% and 13.36% additional oil recovery than that using pure CO 2 in long sand pack and core tests, respectively. This work may provide guidelines for EOR using CO 2 emulsions with high water cut.
研究领域:
石油工程
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ruidong Cheng,Xuehui Zhang,Jie Li,Hua Zheng,Qiuyu Zhang
Most natural supporting tissues possess both exceptional mechanical strength, a significant amount of water, and the anisotropic structure, as well as nanoscale assembly. These properties are essential for biological processes, but have been challenging to emulate in synthetic materials. In an effort to achieve simultaneous improvement of these trade-off features, a hydrogen bonding-induced self-assembly strategy was introduced to create nanoporous plastic-like polymer hydrogels. Multiple hydrogen bonding-mediated networks and nanoporous orientation structures endow transparent hydrogels with remarkable mechanical robustness. They exhibit Young’s modulus of up to 223.7 MPa and a breaking strength of up to 10.3 MPa, which are superior to those of most common polymer hydrogels. The uniform porous nanostructures of hydrogen-bonded hydrogels contribute to a significantly larger specific surface area compared to conventional hydrogels. This allows for the retention of high mechanical properties in environments with a high water content of 70 wt %. A rubbery stage is observed during the heating process, which can reverse and reshape the manufacture of objects with various desired 2D or 3D shapes using techniques such as origami and kirigami. Finally, as a proof-of-concept, the outstanding mechanical properties of poly(MAA-co-AA-co-NVCL) hydrogel, combined with its high water content, make it suitable for applications such as smart temperature monitors, multilevel information anticounterfeiting, and artificial muscles.
研究领域:
材料科学
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生物材料
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
Extreme Mechanics Letters
·
2025
·
IF 4.5
Jingping Wu,Zhengjin Wang,Xiao Liu,Yong Zheng,Yang Gao,Jian Hu
Hydrogels with high water content and toughness are essential to various applications in smart materials and biomimetic systems. However, there exists a conflict between water content and toughness. To enhance toughness, high polymer chain density or water-free reinforcements are usually introduced into hydrogel matrices, which inevitably lead to a reduction in water content. In this study, we present a facile method for preparing water-abundant and tough hydrogels through ion transfer printing. By utilizing sodium alginate/polyacrylamide (Alg/PAAm) hydrogels as a flexible matrix and Fe 3+ ions as stiffening agents, we selectively introduce Fe 3+ ions into predefined regions of the hydrogel matrix, resulting in well-structured composite hydrogels comprising soft Alg/PAAm matrix and hard Fe 3+ -crosslinked Alg/PAAm (Fe-Alg/PAAm) fibers. As both the matrix and fibers are stretchable and water-abundant, the composites exhibit impressive stretchability ( ε ∼1000 %) and water content ( p ∼95 %). Notably, the alternating arrangement of the soft and hard fiber/matrix architecture effectively prevents crack propagation during loading by inducing stress deconcentration at the crack tip, thereby leading to exceptional toughness ( Γ ∼22000 J/m 2 ). This simple method introduces a universal design strategy for constructing stretchable, water-abundant, and tough hydrogels, considering that ionic crosslinking with multi-valent cation crosslinkers is widely used in hydrogels. Beyond the Fe 3+ and Alg/PAAm hydrogel system discussed here, this concept can be extended to various combinations of multi-valent ions and hydrogel networks containing opposite charges.
研究领域:
材料科学
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生物材料
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智能材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Yu-Xiong Ju,Run-Ze Hu,Ping-Yue Wang,Yu-Shi Shen,Fei-Fan Shuang,Jun Wang,Peng Song,Wei-Guo Zhao,Xiao-Hui Yao,Dong-Yang Zhang,Tao Chen
Poly(vinyl alcohol) (PVA) is a safe high-molecular polymer with good biocompatibility that can be prepared into hydrogels with high tensile strength by salting out. However, inorganic ions will cause PVA chains to form strong crystals through intramolecular H-bond interactions, resulting in dehydration of PVA chains and greatly reducing the water content of hydrogels. Herein, inspired by the structural model of straw rammed earth bricks, a PVA, silk nanofiber (SNF), and chitosan (CS) composite hydrogel (PSC) were prepared with a high Young’s modulus (8.85 ± 0.24 MPa), acceptable tensile strength (4 ± 0.28 MPa), and high fatigue threshold (8.09 ± 0.5 kJ/m2). Because SNF plays the role of straw-formed hydrogen bonds (H-bonds) with PVA and CS, the formation of H-bonds between PVA chains was inhibited, leading to more free hydrophilic groups (−OH). Therefore, the water content increased significantly to as high as 87%. By fabricating the structure of straw rammed earth bricks in hydrogels, PSC had both a high Young’s modulus and a high water content, even though the crystallinity of PVA decreased. PSC also showed antibacterial properties against Escherichia coli and Staphylococcus aureus due to CS and are expected to be further applied in biomedicine and tissue engineering.
研究领域:
生物材料学
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组织工程学
✓ 已验证
产品关联
DOI
高影响因子
Soft Matter
·
2023
·Vol. 19
·期 20
·3700-3710
·
IF 3.4
Xiangnan He,Jianxiang Cheng,Zechu Sun,Haitao Ye,Qingjiang Liu,Biao Zhang,Qi Ge
Digital light processing (DLP)-based three-dimensional (3D) printing is an ideal tool to manufacture hydrogel structures in complex 3D forms. Using DLP to print hydrogel structures with high resolution requires the addition of water-soluble photo-absorbers to absorb excess light and confine photopolymerization to the desired area. However, the current photo-absorbers for hydrogel printing are neither efficient to absorb the excess light nor water-soluble. Herein, we report a volatile microemulsion template method that converts a wide range of commercial non-water-soluble photo-absorbers including Sudan orange G, quercetin, and many others to water-soluble nanoparticles with solubility above 1.0 g mL−1. After using these water-soluble photo-absorber nanoparticles, the highest lateral and vertical resolutions of printing high-water-content (70–80 wt%) hydrogels can be improved to 5 μm and 20 μm, respectively. Moreover, the quercetin nanoparticle can be easily washed out so that we achieve colorless and transparent printed hydrogel structures with excellent mechanical deformability and biocompatibility as well as thermally controllable variations on transparency and actuation. The proposed methods pave a new efficient way to develop water-soluble photo-absorbers, which helps to greatly improve the printing resolution of the high-water-content hydrogel structure and would be beneficial to extend the application scope of hydrogels.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Ang Li,Mengqi Zhu,Pengfei Hao,Haihao Wu,Jing Gong,Kun Wang,Weichao Yu,Yaorong Feng
To inhibit wall sticking during gathering of high water cut crude oil, based on the deposition characteristics of the complexes by reaction of phytic acid (PA) with ferric chloride (FC), a simple and environmentally friendly method for carbon steel plate modification was adopted in this study. The effects of reaction time, FC concentration, and deposition times on surface wettability and morphology were investigated. It appeared in the results that the wettability of the surface no longer changed after 1 min of reaction. After two times of deposition, the carbon steel exhibited superhydrophilicity in air and superoleophobicity under water, and more pronounced nano-structures were observed. Comparing with similar works, no electroplating, heating and other devices are required during the entire coating process . Moreover, for the sake of clearly explaining the mechanism of wettability conversion during PA-FC modification, the theory of surface energy and adhesion work were used to quantitatively calculate the adhesion strength of oil droplet on solid surfaces . It was found that the hydrophilization and underwater oleophobicization of materials were essentially a process of increasing the polar component of surface energies, and the opposite adhesion state of oil in air and under water was demonstrated theoretically. Finally, the anti-sticking ability at low temperatures of treated carbon steel was evaluated experimentally. The PA-FC coating showed good oil gel prevention performance below the pour point of crude oil. In conclusion, the wall sticking prevention method proposed in our work provides another way for flow assurance of the transportation of high water cut crude oil.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 49
·30597-30609
·
IF 3.361
Yan Kele,Ren Yuemeng,Lv Cheng,Xiao Anshan,Lv Xiaofang
Hydrate slurry transport technology has become a focal point among worldwide researches, due to its high economic efficiency. However, the mechanism and law of hydrate growth kinetics in flow systems were still unclear, especially in high water-cut oil–water systems with hydrate promoters. On this basis, this paper conducted a series of growth kinetic experiments using a high-pressure transparent sapphire cell, and investigated systematically several influencing factors (such as initial pressure, the concentration of emulsifier, hydrate promoter, and the concentration of hydrate promoter) of growth kinetics, and obtained the quantitative relationship between these factors and gas consumption as well as the hydrate growth rate (gas consumption rate). It could be seen from the analysis of these influencing factors that the presence of hydrate promoters can promote hydrate nucleation rapidly and shorten the hydrate induction time, as compared with the (diesel oil + water) system. The concentration of emulsifier is positively correlated with the induction period of hydrate formation, whether it was sodium dodecyl sulfate (SDS) or L-leucine (L-l) systems. The SDS and L-l system could significantly improve the formation kinetics of methane hydrate in the emulsion system, while tetrabutylammonium bromide (TBAB) and polysorbate 80 (Tween80) significantly inhibited the nucleation and growth of methane hydrate in the emulsion. The kinetic curves of hydrate formation showed a trend of first increasing and then gradually decreasing, with the increase of SDS concentrations. However, the hydrate formation kinetics tended to increase gradually and reach equilibrium in the L-l system, with an increase in the concentration of L-l.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Chunbao Liu,Hui Xu,Yunhong Liang,Suqian Ma,Zhaohua Lin,Lei Ren,Zhiwu Han,Luquan Ren
Ionic-polymer metal composites (IPMCs) actuators show great potential for soft robots due to their large deformations and fast responses at low voltage. However, realizing large and stable deformation remains a challenge since the existence of back relaxation phenomena. Herein, we report high-performance IPMCs actuators fabricated via solution-casting and isopropanol-assisted electroless plating methods. The actuator exhibits extremely large bending deformation (125°) and ultrafast initial response speed (1.09 % s −1 bending strain rate) within one second of the start time under the DC voltage of 3 V. Furthermore, the actuator exhibits no significant back relaxation, even when it lifts objects 11 times heavier and holds up for more than 695 s. The outstanding properties of the actuator are demonstrated by various soft robots, including a guide-grapple robot and a microarchitecture for robotic metamaterials, and a finite element simulation approach is proposed to model the robotic metamaterials. This study offers a viable means for developing high-performance artificial muscles without back relaxation for promising applications in biomedical devices, robotic metamaterials, and soft robotics.
研究领域:
材料科学
·
机器人学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Shengzhen Hou,Xiujun Wang,Jian Zhang
In this work, we show how simple mixing of mineral clay materials and a biopolymer chitosan to afford hydrogel composites with significantly enhanced performances in instant mechanical recovery and self-healing, anti-high temperature and anti-high ionic strength activities. Benefited by the electrostatic attraction between anionic clay and cationic chitosan , molecular level coassembly was achieved, which gave rise to a robust and rapidly self-healable hydrogel. Synergistic effect between components enhanced the mechanical strength more than 10 folds and shortened the self-healable time more than 40 folds (from 220 s to less than 5 s). In addition, the binary hydrogel show extremely enhanced anti-temperature and ionic strength properties. This study offers a feasible and dramatically facile protocol to build functional hydrogel materials using commercially available mineral and biopolymer, which have promising applications in special areas such as underground oil and gas engineering.
研究领域:
材料科学
·
生物学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2017
·Vol. 55
·期 6
·1067-1076
·
IF 2.952
Dalong Zhai,Wei Shi,Yonghai Hui,Zhengfeng Xie
High-efficiency, mild-conditioned tandem Knoevenagel–Michael reaction was utilized to post-modify aldehyde-containing, triphenylamine-based precursor conjugated polymer ( CP1 ) to afford dimedone-decorated aimed polymer ( CP2) . The chemical structure of CP2 was verified by FTIR and 1 H NMR analyses. With the introduction of aqueous Hg 2+ , fluorescence of CP2 in THF-water mixture ( V THF / V water = 1/100) (buffered with 5 mM sodium dihydrogen phosphate-disodium hydrogen phosphate (PB), pH = 7.4) altered significantly, with the emission changed from blue to orange. Besides this, CP2 also displayed specific optical response to ClO − in another probing medium ( V THF / V water = 1/100, buffered with 50 mM PBS (with NaCl in PB, pH = 7.4). The detailed probing process and the plausible detection mechanism of CP2 to Hg 2+ and ClO − were systematically investigated here. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017 , 55 , 1067–1076
研究领域:
高分子化学
·
材料科学
·
分析化学
·
环境监测
·
光学传感
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）