FUEL
·
2023
·
IF 7.4
Xianbin Huang,Zhiwen Dai,Chao Zhang,Kaihe Lv,Xu Meng,Ren Wang,Shaine Muhammadali Lalji,Muhammad Arqam Khan
Wellbore instability in complex shale formations is a major technical problem that threatens drilling safety and efficiency. In this paper, a hydrophobic cationic polyamine shale inhibitor (HCPA) was prepared by introducing a hydrophobic group in the molecular structure of an amine-based shale inhibitor having a branched structure. The shale inhibition performance of HCPA and the amine-based shale inhibitor without the hydrophobic group (CPA) was investigated. The hydration inhibition mechanism of HCPA was studied by experiments of zeta potential, particle size, contact angle, thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), etc. The evaluation results show that HCPA had a better performance than CPA in terms of inhibition of hydration swelling, hydration dispersion and mud making, which indicates that the hydrophobic group is beneficial to improve the inhibition ability of the amine-based shale inhibitor. The mechanism study shows that there is no hydrogen bond between HCPA and clay. The adsorption on the clay surface is mainly driven by electrostatic interaction, which reduces the repulsion of the electric double layer and thus inhibits the osmotic swelling of clay. HCPA could increase the water contact angle of the rock from 36.6° to 133° at a concentration 0.5%, beneficial to reduce surface free energy. The bentonite modified by HCPA had a lower weight loss of at 200 °C than bentonite modified by CPA according to TGA test, and the interlayer spacing of HCPA-modified bentonite was reduced compared with that of the unmodified bentonite, indicating that the ability of bentonite to adsorb water molecules is reduced after the introduction of hydrophobic groups, beneficial to inhibit the crystalline swelling of clays. In addition, HCPA can reduce the imbibition capacity of rocks by reducing the surface tension of water. Therefore, the concept of introducing hydrophobic groups in the molecular structure proposed herein could provide an avenue to develop high-performance shale inhibitors.
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
LANGMUIR
·
2021
·
IF 3.882
Pei Lyu,Xiangyi Zhang,Xin Jiang,Bin Shang,Xin Liu,Ziwei Deng
Multifunctional surfaces that are favorable for both droplet nucleation and removal are critical for water-harvesting applications, but there still remain great challenges. Herein, we proposed a facile strategy to construct hydrophobic surfaces containing moderate hydrophilic groups to achieve both exceptional droplet nucleation and removal. Different from natural desert beetle-inspired water-harvesting materials, these surfaces utilize limited hydrophilic domains to condense fog, and transport of formed tiny droplets relies on a hydrophobic background. The total surface area of the presented hydrophobic fabric contains hydrophilic groups, and the areas for trapping fog have increased. This feature is optimized to enhance the droplet nucleation density, and the surface still has excellent liquid repellency, resulting in maximum water collection efficiency of the prepared surface reaching up to 3.145 g·cm–2·h–1, much higher than the most reported water-harvesting materials. Due to its high efficiency and scalability, we believe that the proposed strategy to construct hydrophobic surfaces containing hydrophilic groups has great practical value.
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
AICHE JOURNAL
·
2020
·Vol. 66
·期 9
·e16296
·
IF 3.519
Yan Lin,Li Liu,Meng-Ting Sun,Chen Chen,Guo-Dong Zhang,Yan He,Fei Wang
Gas hydrates have been endowed with great potential as the medium for natural gas storage & transportation. In this work, we prepared novel nanopromoters by grafting hydrophilic groups ( SO 3 − , COO − and N[CH 3 ] 3 + ) covalently on polystyrene nanospheres (Group@PSNS), and for the first time achieved rapid formation of methane hydrates together compact agglomeration by regulating the hydrophilic groups on the surface of nanopromoters. When SO 3 − @PSNS was used, methane hydrates formed rapidly but loosely in the reactor; while for COO − @PSNS and N(CH 3 ) 3 + @PSNS, even the hydrate formation rate was seriously reduced, the formed hydrates agglomerated compactly in the reactor bottom. Interestingly, when both SO 3 − and COO − were fixed on the nanospheres, both the hydrate growth rate and agglomeration compactness were controlled. Especially, the nanopromoter with the SO 3 − / COO − molar ratio of 2:1 resulted in the formation of methane hydrates with compact agglomeration morphology within 1–2 hr and with the storage capacity reaching 140–145 vol/vol.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Wei Huang,Xiangyu Tang,Zhe Qiu,Wenxin Zhu,Yonggui Wang,You-Liang Zhu,Zefang Xiao,Haigang Wang,Daxin Liang,Jian Li,Yanjun Xie
Inspired by the distinct functions of desert beetles with efficient droplet nucleation and lotus leaves with excellent droplet removal, an integrated method is presented for the design of a superhydrophobic surface decorated with hydrophilic groups that can efficiently nucleate and remove water droplets. We constructed a cellulose-based superhydrophobic surface containing numerous olefin terminal groups by solvent exchange and spray coating. This surface is different from most of the reported biomimicking water harvesting surfaces that rely on complicated lithography and micropatterning techniques requiring special instruments. The obtained superhydrophobic surface was further modified using various thiol compounds via a thiol–ene reaction to manipulate the water harvesting property. The modified surfaces containing hydrophobic groups (e.g., 1-octadecanethiol and 1H,1H,2H,2H-perfluorodecanethiol) or a strong hydrophilic group (e.g., 3-mercaptopropionic acid and 6-mercapto-1-hexanol) exhibited insufficient fog collecting abilities due to poor water droplet nucleation or strong water adhesion. By contrast, the modified surface decorated with moderately hydrophilic amino groups combines the advantages of biological surfaces with distinct wetting features (such as fog-harvesting beetles and water-repellent lotus leaves), resulting in accelerated water nucleation and less compromise of the water removal efficiency. Molecular dynamic simulations revealed that the efficient droplet nucleation is attributed to the hydrophilic amino groups whereas the rapid droplet removal is due to the maintained superhydrophobicity of the amino group-modified surface. This strategy of decorating a superhydrophobic surface with moderately hydrophilic functional groups provides insight into the manipulation of droplet nucleation and removal for water collection efficiency.
研究领域:
材料科学
·
仿生学
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Dengchao Liang,Jiebin Tang,Qi Sun,Wenwen Zhao,Junhui Li,Yongxu Liu,Zixuan Liu,Xuan Yang,Hong Liu,Guobin Xue
Given the abundant solar energy resources and remarkable heat utilization efficiency, solar interfacial evaporation is a promising approach in addressing the global freshwater crisis. The primary bottleneck impeding the industrial implementation of solar interfacial evaporation lies in its relatively low production rate because of the high latent heat of water evaporation. Here, we effectively reduce the latent heat by synergistically optimizing hydrophilic groups, regulating pore network structure, and adjusting interfacial water state of the cellulose/chitosan gel. The latent heat of water evaporation in this evaporator can be reduced from 2444 kJ kg −1 (bulk water) to 786 kJ kg −1 , and the evaporation rate can be high as 3.99 kg m −2 h −1 under 1 sun irradiation. This study of reducing latent heat of water evaporation holds immense significance in designing efficient evaporation systems for industrial applications.
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
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2021
·Vol. 24
·期 6
·923-931
·
IF 1.902
Yun Li,Danyang Sun,Chenhui Jiang,Haiyan Ding,Quanjie Wang
Polypeptide surfactants with different lengths of hydrophilic groups and lipophilic groups were synthesized from collagen hydrolysate polypeptides by the Schotten-Baumann reaction. Collagen hydrolysate polypeptides were prepared through alkaline hydrolysis of chromium-containing leather wastes, followed by changing the molecular weight of the collagen hydrolysate and the carbon chain length of the acid chloride. Fourier transform infrared spectroscopy, confirmed the successful synthesis of the polypeptide surfactants. Furthermore, surface activities of surfactants were tested to reflect the influence of the length of hydrophilic and lipophilic groups on properties, such as surface tension, foamability, foam stability, wettability, and Hydrophile–Lipophile Balance value. The results indicated that for surfactants prepared from collagen hydrolysate, a shorter hydrophilic group length resulted in lower surface tension and better foamability, foam stability, and a wetting ability which indicates the surfactants can be used as wetting agents. In contrast, the surfactant with a greater lipophilic group length had lower surface tension and poorer foamability, foam stability, and wetting ability. The presence of the C=C bond of the oleoyl lipophilic group decreased surface tension. The polypeptide surfactants prepared from collagen hydrolysate not only can effectively utilize chromium-containing leather solid waste produced, but also avoid environmental pollution and promote the sustainable development of the leather industry.
研究领域:
生物化学
·
环境科学
·
皮革工业
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Henghui Huang,Qi Yao,Xiuping Zhang,Haijiang Wang
Introducing hydrophilic groups and increasing the compatibility of the ionomer and reinforcement layer can have a significant impact on the proton conductivity and cell performance of a proton exchange membrane (PEM) under lower relative humidity (RH). In this work, a novel PEM containing expanded polytetrafluoroethylene (ePTFE) functionalized with amino and hydroxyl groups is designed and fabricated to enhance the PEM's proton conductivity and electrochemical performance at low RH, and to improve its mechanical stability. The introduction of the hydrophilic groups and the generation of stable acid–base pairs yield a PFSA ionomer that has better compatibility with and adhesion to the hydrophilic functionalized ePTFE membrane, thereby significantly improving the prepared membrane's proton conductivity, H 2 crossover current density, and single-cell performance. In addition, generated water is retained inside the PEM, keeping its cell performance high at low RH. The PEM's mechanical durability is also improved by the increased dimensional stability and compatibility of the ionomer and reinforcement layer. This work provides a promising way to improve the proton conductivity and cell performance of PEMs at low RH and has great application potential for creating PEM fuel cells with high mechanical durability.
研究领域:
材料科学
·
能源工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Runling Xu,Keng Xuan,Shikun Chen,Shuai Yan,Jun Wan,Kaixuan Zhao,Yaoping Guo,Mingxin Zheng,Ruowei Liang,Meiyu Jia,Yadan Guo
Efficient capture of uranium (VI) from wastewater holds great importance for environmental remediation and sustainable development of nuclear energy. Herein, polysulfide PS-HEA-X with grafted hydrophilic groups was fabricated as an efficient adsorbent for the capture of uranium (VI) in water by using 2-hydroxyethyl acrylate (HEA) as a hydrophilic regulator. The practical maximum uranium (VI) adsorption capacity of hydrophilic PS-HEA-20 reached 638.29 mg/g, which was about 24 times that of hydrophobic PS-HEA-0 synthesized without HEA modifier. The uranium (VI) adsorption capacity of PS-HEA-20 per unit surface area reached 124.42 mg/m 2 , which outperformed most reported absorbents. Structure-performance relations indicated that the grafted –OH, –COO- groups improved the hydrophilicity of PS-PEA-20, hereby facilitating the diffusion of uranium (VI) in solution to the surface of PS-PEA-20. Adsorption mechanism investigation results showed that UO 2 2+ were captured by the surface S atoms of PS-HEA-20 through soft acids-soft base interaction. PS-HEA-20 exhibited excellent reusability and the adsorption capacity remains higher than 90 % after five cycles using Na 2 CO 3 solution as eluent. This work not only expands the application of S-based polymer for efficient capture of uranium (VI) from water, but also offers a facile strategy for the fabrication of polysulfide for the capture of uranium (VI) and other heavy metal ions.
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
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Ximing Zhong,Meng Zhou,Sheng Wang,Heqing Fu
Existing approaches for the preparation of anti-smudge surfaces are prominently confined to the use of fluorinated materials and highly toxic organic solvents. Smooth water-borne non-fluorinated anti-smudge surfaces are highly desirable for their high safety, low cost and environmental friendliness, and they could also address the challenges plagued by the deficiencies in long-term stability, durability, and scalability existing in present coating systems. Herein, we, for the first time, develop a novel smooth non-fluorinated anti-smudge system by crosslinking the hydrophilic groups in two water-borne components. The resultant surfaces are highly transparent, and they show striking anti-smudge performance toward various liquids, including water, hexadecane, diiodomethane, decane, ethanol, etc. Besides, these surfaces demonstrate remarkable chemical shielding ability against acid solution and alkali solution and thus protect substrates against exposure to harsh chemical environments. Also, they exhibit self-healing ability against chemical and physical damages. Compared with commercial fluorinated amphiphobic surface and superhydrophobic surface, these non-fluorinated surfaces show incomparable advantages in anti-smudge performance, pump oil and crude oil droplets could slide off the surface without leaving any traces. Furthermore, these surfaces could be applied for anti-graffiti and anti-fingerprint purposes due to their outstanding anti-smudge performance toward water-borne and oil-borne paints, ink, and artificial fingerprint liquid. More strikingly, they could maintain anti-smudge performance even after being subjected to long-term UV irradiation and physical damages, such as impact and scratch, indicative of the remarkable weathering resistance and the outstanding mechanical durability of these coating surfaces. Therefore, excellent performances in addition to the cost-effective and environmentally-friendly features make these newly-developed smooth water-borne non-fluorinated anti-smudge surfaces promising for widespread applications.
研究领域:
材料科学
·
表面化学
·
环境科学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Zhijie Yuan,Xiaoli Wu,Yanjun Jiang,Yifan Li,Jiajia Huang,Lan Hao,Jie Zhang,Jingtao Wang
Herein, a series of composite membranes hybridized by sub-5 nm carbon dots (CDs) in polymer active layer were fabricated for organic solvent nanofiltration . The CDs with tailored functional groups were facilely synthesized and embedded into polyethyleneimine (PEI) matrix, and then dip-coated on polyacrylonitrile support to prepare composite membranes through interfacial polymerization. The resultant membranes were characterized by scanning electron microscopy, atomic force microscopy , fourier transform infrared spectroscopy , contact angle, thermal gravity analysis and tensile testing . The nanofiltration performances of membranes were evaluated by solvent uptake behavior, solvent flux and solute rejection, confirming that hybridization of small-sized CDs could well exert the advantages of PEI and CDs: the completely cross-linked PEI networks assured excellent solvent resistance and solute rejection ability, whilst CDs worked as selective nano-accelerators for solvent transfer via their functional groups. Carbonation degree acutely governed the acceleration ability of CDs for different solvents. And for instance, lowly carbonated CDs could efficiently adsorb polar solvents by the hydrophilic groups, thus providing a 54.3% permeance increase for isopropanol to 42.6 L m −2 h −1 . Meanwhile, this kind of CDs also suppressed the transport of non-polar solvents and thereby enhanced membrane selectivity. In contrast, obvious increase of non-polar solvent uptaking and permeation was achieved by high-carbonation-degree CDs via their hydrophobic domains.
研究领域:
材料科学
·
化学工程
·
纳米技术
·
膜技术
✓ 已验证
DOI
高影响因子
ACS ES&T Water
·
2022
·
IF 0
Zhao Yang,Shushan Yuan,Yimeng Shi,Yuting Zhang,Shijie Bian,Sha Liang,Keke Xiao,Wenbo Yu,Huijie Hou,Jingping Hu,Bingchuan Liu,Jiakuan Yang
Membrane fouling and acidic environment instability are inevitable problems restricting the widespread application of membranes in wastewater treatment. Herein, we report a polyelectrolyte hydrogel membrane with high acid resistance and antifouling properties synthesized by phase inversion of Kevlar nanofibers solution. The hydrogel membrane, compared to the commercial PVDF membrane, has a higher rejection of Congo Red, Direct Red 23, and Direct Red 80 solutions, and excellent antifouling performance when filtering bovine serum protein or humic acid solution. The high antifouling performance is attributed to a large number of hydrophilic groups in the structure of the hydrogel, which can induce the formation of a protective layer of hydration, thus reducing the pollutants adsorbed on the surface. Besides, the acid resistance ability of the Kevlar membrane was verified by a phosphoric acid (pH = 0) immersion experiment. Due to the superior performance of this membrane and the one-step preparation process, the developed Kevlar membrane has great potential applications for wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 3
·801-810
·
IF 2.5
Wang Yi,Qin Hui,Chen Shuyi,Liu Yuan,Luo Jun,Nie Shengqiang
In this study, a highly efficient, convenient, and universal protocol of in situ cross-linking copolymerization of 2-hydroxyethyl methacrylate and sodium p-styrenesulfonate in polyvinylidene fluoride (PVDF) solution was presented to prepare blood-contacting material with good blood compatibility. The modified PVDF membranes were prepared by liquid–liquid-phase inversion technology, which could induce the enrichment of hydrophilic groups including sulfonic acid and hydroxyl groups on the surface of the modified PVDF membranes. The hydrophobic-fluorinated PVDF surfaces with hydrophilic sulphonic acid and hydroxyl groups exhibited high performance with prolonged clotting time (activated partial thromboplastin time and thrombin time) and low activation of blood components (platelets, coagulation cascade, and complements) when they contacted blood. On the other hand, the ultrafiltration experiment results revealed the improvement in the antifouling properties of the modified PVDF membranes after the introduction of hydrophilic groups on the membranes surface. The results indicate that the blood-compatible PVDF membranes may have potential to be used in the field of blood purification, and can be used as long-term blood-contacting materials as well.
研究领域:
材料科学
·
生物医学工程
·
血液相容性
·
膜技术
✓ 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）