Nano Energy
·
2022
·
IF 19.069
Yuqi Qiu,Han Fang,Jiajie Guo,Hao Wu
Recent advancements in flexible electronics have imposed the challenge on developing multifunctional devices for long-term on-skin wearing comfort. Here, a self-powered fully nano/micro-fibrous triboelectric on-skin patch is developed. The all-polymer-based poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/polyvinyl alcohol nanofibrous membrane is used as the electrode for the first time, and polyimide/thermoplastic polyurethane (1:1) nanofibrous membrane along with thermoplastic polyurethane nano/micro-fibrous membrane work for contact electrification pairs. The patch exhibits excellent breathability with the water vapor transmittance rate of 8 kg m −2 day −1 , and hydrophobicity with the water contact angle of 113°. The capability of the patch for physiological status monitoring is further demonstrated through applications of fingertip interaction force detection, pronunciation sensing, human motion monitoring, and finger gesture recognition, representing the promising potential in interactive on-skin devices and health monitoring.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Qipeng Ma,Weiyao Zhu,Zhiyong Song,Jie Zhang,Bingbing Li,Wengang Bu,Bin Pan
Interfacial tension (IFT) and wettability are two key parameters determining pore-scale oil/water distributions and reservoir-scale hydrocarbon production performances. However, how ionic liquid (IL, a green, stable, and efficient chemical) will manipulate IFT and wettability for EOR in sandstone reservoirs has not been sufficiently investigated yet, and the underlying mechanisms at the micro-level are still unknown. In this study, the influences of two typical ILs at various concentrations (i.e., 0.01, 0.1, 1, and 5 mmol/L) on oil–water IFT and alpha-quartz (α-quartz) wettability were investigated. This study shows that low concentrations of ILs can greatly reduce alkane-water IFT, and gemini IL has higher interfacial activity than mono-cationic IL, which is due to the fact that gemini IL with longer alkyl chains is more likely to form conglomerates at lower concentrations. Both the advancing and receding contact angles increase continuously with concentration in ILs solution, which can be given responsibility for the decrease in IFT and the solid–liquid interaction resulting in an increased capacity of alkane droplets to migrate on the α-quartz surface. Additionally, the molecular dynamic simulations examined the micro-wetting process and interaction energy of the IL-alkane-quartz system, and revealed that ILs can effectively reduce interaction energy between octane droplets and α-quartz surface. These insights have promising applications to enhanced oil recovery and oil contamination removal at subsurface.
研究领域:
石油工程
·
化学工程
·
分子动力学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Wenxia Sima,Kaisen Fan,Potao Sun,Tao Yuan,Ming Yang,Zhaoping Li,Fengqi Liu,Yao Yuan
Repairing the micro-scale damage of insulating materials under a strong electric field has long been a highly desired but challenging task. Among all kinds of damage, water tree damage in the insulating materials of electrical equipment and electronic devices working in humid environments has long been considered irreparable. The main challenge is that residual water prevents the healing agent from filling the water tree branch channel. To solve this problem, this work reports a magnetically targeted, water-triggered, self-healing microcapsule (MTWTSH-MC) that makes a breakthrough against water tree damage based on microfluidic techniques. Targeted microcapsules driven by a directional magnetic field are concentrated to the vulnerable area of the insulating materials, exerting very limited effects on the dielectric. When damage breaks the microcapsules, the healing agent releases and quickly fills the damage channel and then reacts with water in the air or in the branch channel of the water tree, achieving solidification of the healing agent and self-healing of the damage channels. In this way, we can realize self-perception, self-triggering, and self-healing for both mechanical damage and water tree damage in insulation materials without any external stimulation.
研究领域:
材料科学
·
电气工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Depeng Chen,Linling Cui,Hui Rong,De’e Liu,Yuan Fang,Thumelo Jonathan Sithole,Yaling Wang,Yajun Lv,Zhong Lv,Tengfei Xiang
The deterioration of cement-based materials is frequently associated with water infiltration. This work introduces hydrophobic nanoparticles (NPs) synthesized from silicon dioxide with varying particle sizes, which significantly enhance the water repellency when incorporated into mortar. The results indicate a clear negative correlation between the water contact angle (WCA) of the mortar and the size of the hydrophobic NPs; when 20 nm hydrophobic NPs are incorporated, the WCA can reach 153.16 °, exhibiting three-dimensional superhydrophobicity. Furthermore, the water absorption rate of the superhydrophobic mortar after 120 hours immersion is only 42.16 % of that of ordinary mortar. In electrochemical corrosion experiments, the corrosion current density of the superhydrophobic mortar is two orders of magnitude lower than that of ordinary mortar, effectively preventing corrosive liquids from penetrating the steel reinforcement within the concrete. This work provides a solid scientific and theoretical foundation for the widespread application of superhydrophobic cement-based materials in harsh, high-humidity, and corrosive environments.
研究领域:
建筑材料学
·
腐蚀科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CEMENT & CONCRETE COMPOSITES
·
2024
·
IF 10.8
Aofei Guo,Danying Gao,Zhihui Sun,Hu Feng,Zhenyun Yu,Zeyu Guo,Hong Shang,Fengjuan Liu
Tricalcium silicate (C 3 S) is the primary ingredient in ordinary Portland cement (OPC). Understanding the hydration kinetics of C 3 S with cellulose nanocrystals (CNC) is the key to unveiling the intrinsic mechanism of CNC affecting OPC hydration . This study investigates the hydration interactions between C 3 S and CNC through extensive testing. Findings indicate that CNC incorporation can initially slow the hydration reaction and postpone the early-stage hydration of C 3 S. However, past the initial period (3 days in this study), CNC presence enhances the hydration pace and aids the hydration process , leading to an increase in the formation of calcium silicate hydrate (C–S–H) and calcium hydroxide (CH) without creating new phases. Further, the presence of CNC promotes the homogenous hydration of C 3 S, ensuring a homogenous distribution of hydration products . It also reduces the Ca/Si ratio in the C–S–H, without altering the C–S–H morphology. A correlation is made between heat flow and the thickness of hydration products enveloping C 3 S particles, confirming that CNC can intensify the inward water diffusion rate through C 3 S particles for the same hydration product thickness. Critically, it is found that the effect of CNC on C 3 S hydration is dependent on the water/C 3 S ratio. A low or moderate water/C 3 S ratio can promote C 3 S hydration but a very high water/C 3 S ratio diminishes the beneficial effects of CNC on C 3 S hydration. Finally, the study proposes a explanation for CNC's influence over the hydration of C 3 S with varying water/C 3 S ratios.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 21
·46312
·
IF 1.901
Yangyang Zhao,Fuwei Nian,Hao Pang,Jianheng Huang,Hongwei Zhao,Kun Wang,Bing Liao
Star-shaped superplasticizers, which incorporated polyol ester with unsaturated bond at their cores and bore comb-type structures as their arms were synthesized via esterification-copolymerization in aqueous phase from pentaerythritol, acrylic acid (AA), and isopentenyl oxy poly(ethylene glycol ether) (TPEG). The monomer ratios of AA and TPEG were varied and comonomer sodium methallyl sulfonate (SMAS) bearing short side chains was added to regulate the arm structure of star-shaped polycarboxylate superplasticizers (SPCEs). The effects of the SPCEs on cement paste were investigated and the cement dispersion as well as early hydration mechanism were explored. As a main result, SPCEs with SMAS and certain molar ratios for anchoring groups and PEO side-chains in their arm structure exhibited good paste dispersion and fluidity retention, which also delayed the early hydration process and prolonged both the initial and the final setting time. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46312.
研究领域:
材料科学
·
土木工程
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2023
·Vol. 66
·期 10
·2958-2967
·
IF 4.6
Ren TingTing,Huang Lu,Xie ShangZhen,Chen GuoPeng,Liu Peng,Chen LinGen
Harvesting water from the air using adsorbents and obtaining fresh water by solar-driven desorption is considered as one of the most effective ways to solve the freshwater crisis in arid and desert regions. Based on a simple and low-cost photothermal hygroscopic hydrogel, a new strategy is proposed to boost solar energy efficiency by coupling solar-driven atmospheric water harvesting technology with thermoelectric power generation technology in this paper. Photothermal hygroscopic hydrogel ink PAM-CaCl 2 is prepared by in situ polymerization using Acrylamide as monomer, Ammonium persulfate as thermal initiator and CaCl 2 as hygroscopic component. During the day, the photothermal hygroscopic hydrogel absorbs solar energy and evaporates its own internal water to obtain fresh water. Simultaneously, the residual waste heat is utilized to power the thermoelectric panel, which produces electricity based on Seebeck effect. At night, the hydrogel harvests water molecules in the air to achieve regeneration. This hybrid system can achieve a water production rate of 0.33 kg m −2 h −1 and an additional electrical energy gain of 124 mW m −2 at 1 kW m −2 solar intensity. Theoretical model of the hybrid system is developed to understand the heat flow and thermoelectric generation process. The results provide new insights into energy and freshwater replenishment options in arid or desert areas with abundant solar energy.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Yue Liu,Ye Tian,Wenqing Cao,Shuaiheng Zhao,Yingqi Qiu,Lin Feng
Freshwater scarcity threatens human survival, particularly in extreme environments like deserts, oceans, and space. Compatible atmospheric water harvesting and undrinkable water purification offer an affordable approach to solving freshwater scarcity in these extreme environments. Nonetheless, developing composite sorbent to attain efficient atmospheric water harvesting and undrinkable water purification remains challenging. Hence, a portable hybrid hygroscopic powder (HLC powder) consisting of hydroxypropyl chitosan, dibenzaldehyde-functional poly(ethylene glycol), lithium chloride (LiCl), and nano carbon black is proposed. The HLC powder with optimized LiCl load can capture moisture from the air, showing a high water uptake of 1.76 g g −1 at 34% relative humidity (RH) and appropriate over a wide humidity from 34% to 75% RH. pH-responsive sol-gel transition induced by Schiff base bonds transforms the HLC solution into hydrogel, inhibiting hydrated salt leakage. Meanwhile, to achieve efficient undrinkable water purification, the LiCl-free hybrid powder is utilized to convert the undrinkable water, including seawater, dye water, and human urine, to photothermal hydrogel evaporators with low evaporation enthalpies and high evaporation rates ranging from 1.81 to 2.05 kg m −2 h −1 under one sun. This strategy establishes a new path to conveniently obtaining freshwater, breaking hydrological restrictions.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水资源管理
✓ 已验证
DOI
PubMed
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Kexin Li,Mingzhe Dong,Li Han,Mingzhen Li,Huifang Zhang,Xiushen Ye,Haining Liu,Siyuan Zhang,Quan Li,Honghui Liu,Guosheng Shi,Zhijian Wu
The electrolytic production of magnesium metal requires anhydrous MgCl 2 with a high-purity, which is usually prepared through the dehydration of MgCl 2 ·6H 2 O at a relatively high temperature. The Mg 2+ cations in MgCl 2 ·6H 2 O have a high affinity for water and the complete dehydration of MgCl 2 ·6H 2 O is difficult due to the hydrolysis of the hydrated Mg 2+ cations. The hydrolysis usually results in the formation of unwanted oxycompounds of magnesium. In this study, the effects of the addition of AlCl 3 and NH 4 Cl on the dehydration of MgCl 2 ·6H 2 O were investigated by comparing the thermal decomposition processes of MgCl 2 ·6H 2 O, MgCl 2 ·6H 2 O/AlCl 3 , and MgCl 2 ·6H 2 O/NH 4 Cl, using Raman, FT-IR, TG-DSC, XRD techniques and theoretical calculations. It was found that the addition of AlCl 3 or NH 4 Cl significantly reduces the dehydration energy barrier of MgCl 2 ⋅6H 2 O, decreases the dehydration temperature, and suppresses the hydrolysis of MgCl 2 ·6H 2 O. Anhydrous AlCl 3 can extract water from MgCl 2 ·6H 2 O at room temperature. The interactions between Al 3+ or NH 4 + and H 2 O, together with the substitution of Cl - for H 2 O, result in the easier production of anhydrous MgCl 2 . During the dehydration of MgCl 2 ·6H 2 O, several impurities including MgO are generated, indicating that the environment remains to be an important controlling factor for the dehydration of MgCl 2 ⋅6H 2 O. The results obtained would be helpful for understanding the dehydration processes and mechanisms of MgCl 2 ·6H 2 O under the assistance of AlCl 3 and NH 4 Cl, and for exploring new techniques for MgCl 2 ·6H 2 O dehydration.
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
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Yamei Yang,Rui Du,Changrui Shi,Jiafei Zhao,Yongchen Song,Lunxiang Zhang,Zheng Ling
With the rapid development of agriculture, controlling phosphorus emissions is a pressing challenge for preventing water eutrophication . A graphite-promoted cyclopentane (CP) hydrate-based desalination was proposed to remove K 3 PO 4 from effluents. It was found via the in situ optical microscopy that the reaction temperature and the concentration of feeding K 3 PO 4 solution significantly affect the morphologies and amount of the as-produced CP hydrate crystals. The lower reaction temperature produces more crystals with irregular shapes, while fewer crystals formed in K 3 PO 4 solution with higher concentration. The reaction temperature, time and feeding concentration-dependent desalination and salt enrichment performances were studied. It was found that desalination efficiency linearly increases with the elevated reaction temperature ranging from − 2 °C to 3 °C; however, water recovery declines with temperature. The temperature-dependent water recovery is due to the strong driving force for hydrate formation at low temperatures. The time-dependent water recovery shows a three-stage feature, including exponential growth, linear increase, and stable stages, owing to the interaction between the driving force of supercooling and the increasing K 3 PO 4 concentration during the reaction processes. The desalination efficiency shows an inverted volcanic shape with the increased concentration of feeding K 3 PO 4 solution. The pre-melting effect plays a critical role in improving desalination efficiency at high K 3 PO 4 concentrations. A maximum desalination efficiency of 85.0% was reached for treating an artificial solution with salinity as high as 42452 mg/L. Both desalted water and concentrated phosphorus-containing solution can be recovered by this method, which is attractive for producing freshwater with potential for recovery of resources.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Linlin Yan,Xiaobin Yang,Yuanyuan Zhao,Yadong Wu,Richard Motlhaletsi Moutloali,Bhekie B. Mamba,Pavel Sorokin,Lu Shao
Membrane fouling is one of the difficult challenges that restrict the efficient application of membrane separation technology in oil/water separations. Hydrogel with strong hydration capability has been considered as an ideal material for preparing anti-oil-fouling coating for membranes. Although some hydrogel-based coatings have been developed for the membrane interface hydrophilization modification, controlling the morphology of gel layers and improving the flux of hydrogel coated membranes remains a difficult matter to resolve. In this study, we elegantly designed a new mineral-hydrogel coating with nanostructures to modify hydrophobic polyvinylidene fluoride (PVDF) microfiltration membranes by an alternate quaternary soaking strategy. Compared with the merely hydrogel-coated membrane, the pure water flux of novel mineral-hydrogel coating membrane increased by 214% and the permeation increased by 127% with the oil rejection rate of 99.6% at 0.4 bar. Most importantly, the newly-built mineral-hydrogel layer on porous support possessed excellent hydrophilicity, underwater super-oleophobic properties and superior anti-oil-fouling performance, which is greatly promising in oily sewage remediation. In addition, this mineral-hydrogel coating could also be constructed on other hydrophobic substrates successfully, such as commercial melamine resin. Our facile strategy for designing and constructing synergetic mineral-hydrogel architecture may also inspire other functional coatings with nanostructures.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
✓ 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）