JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2022
·Vol. 35
·期 1
·04022362
·
IF 3.651
Ming Zhang,Luyan Wang,Xiuzhi Zhang,Xiangyun Mi,Fengmeng Sun,Zhenzhen Fang,Meishan Pei
In this study, sodium hypophosphite (SHP) was used to modify polycarboxylate superplasticizer (P-PCE), and the properties of P-PCE on β-calcium sulfate hemihydrate (β-HH) were systematically investigated. The results showed that P-PCE could exhibit better fluidity and more retarding effect compared with the conventional polycarboxylate superplasticizer (C-PCE). The reason might be ascribed to the higher adsorption ability of P-PCE because of its stronger complexing capacity with calcium ion, which was induced by the phosphonate and phosphinate groups in the P-PCE molecule. Additionally, PCE played an important function in hindering the calcium sulfate dehydrate (DH) crystallization instead of the dissolution of β-HH, resulting in the retarding effect. This new type of PCE can show great potential in gypsum engineering.
研究领域:
建筑材料学
·
材料化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Yueyun Fang,Qizhang Huang,Pengyi Liu,Jifu Shi,Gang Xu
This study demonstrated high-efficient dye adsorption for wastewater using MoS 2 -glue sponge as an easy-separative and regenerative adsorbent. Flower-like molybdenum disulfide (MoS 2 ) nanopowders with rich polar edge sites were firstly synthesized by a facile one-pot hydrothermal method . Chemical and morphological features of MoS 2 nanoflowers were then examined by XRD , XPS , SEM and TEM . Afterwards, different concentrations of the MoS 2 -glue sponges with easy separability were successfully fabricated by a convenient two-step dip-coating method. The adsorption performance was estimated by the removal of Rhodamine B (RhB) dyes. The results proved that the maximum adsorption capacity of MoS 2 -glue sponge was 127.39 mg RhB/g product in 60 min. The RhB uptake behaviors can be well described by the Sips isotherm model and pseudo-second-order kinetic model , indicating a multilayer and chemical adsorption process. The adsorption mechanism proposed that the zwitterionic RhB molecules in aqueous solution would aggregate on the surface of negative charged MoS 2 in a head-to-tail way through electrostatic interaction . Furthermore, RhB dyes could desorb easily from MoS 2 -glue sponges when changing the polarity of solvent and the reusability experiment showed that the MoS 2 -3% glue sponge could be reused for 15 times with above 85.8% of the adsorption capacity retained. Thus, the novel MoS 2 -glue sponge is considered as a competitive adsorbent for treatment of dyestuff waste water.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
化学工程
·
水污染控制
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Ruiqi Na,Yudong Liu,Nan Lu,Shuling Zhang,Fengqi Liu,Guibin Wang
Hydrogel electrolytes are attracting increasing interest and have made great progress in flexible supercapacitors (SCs). However, the unsatisfactory ionic conductivities and mechanical properties of traditional hydrogel electrolytes greatly limit their use in the flexible SCs, which is hard to run a long-term operation and repeated-deformation for energy devices. Here a hydrophobic association hydrogel electrolyte (HA-GPE) for flexible supercapacitors was successfully prepared by a facile and effective polymerization process. The stable hydrophobic association physical crosslinking design can disperse external stress effectively, provides HA-GPE robust mechanical properties with a tensile strength of 431.9 kPa, an elongation at break of 1150.2% and a compressive stress of 4.8 MPa, much better than those hydrogel electrolytes recently reported. While methodical molecular design enables abundant ion-conductive amine (–NH 2 ) and ethylene oxide (EO) functional groups distributed in HA-GPE network, together with the interconnected porous network structures, allowing for more efficient Li + ions transport, bring the ionic conductivity achieves as high as 31.1 mS cm −1 at room temperature, which is 3 times higher than the corresponding liquid electrolyte (10.5 mS cm −1 ). The flexible supercapacitor using this HA-GPE as the electrolyte and the activated carbon as the electrode exhibits excellent electrochemical performance with the specific capacitance of 130.3 F g −1 at 0.5 A g −1 and capacitance retention of 90.1% after 5000 cycles, superior to that of supercapacitor with liquid electrolyte and commercial separator. Additionally, the device associated with the HA-GPE possesses outstanding electrochemical stability under both bending states and durability test. All these results suggest that the HA hydrogel electrolyte is a promising candidate for portable electronics.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zihao Guo,Chenyi Shao,Yitian Su,Lan Chen,Qiaoling Kang,Xianhe Meng,Chengbin Jin,Tingli Ma,Meiqiang Fan,Dongliang Peng,Lijing Yan
Hydrogel electrolytes have distinguished themselves in aqueous zinc metal batteries due to their strong designability and diverse functions, especially in inducing even zinc deposition and inhibiting side reactions. While the high water content of hydrogel electrolytes can enhance Zn2+ ionic conductivity, it also tends to exacerbate undesirable water-related side reactions; thus, how to realize fast zinc ion transport kinetics under low water content remains a challenge. This work introduces carboxylated cellulose nanofibers with ample and diversified polar functional groups into cross-linking polyacrylamide networks to form hydrogel electrolytes. The strong hydrophilic groups of cellulose nanofibers, including carboxyl, hydroxyl, and inter/intramolecular ether bonds, not only grasp water molecules to facilitate desolvation of [Zn(H2O)6]2+ but also disperse the single-site binding energy to Zn2+ through multiple adjacent O atoms, effectively reconciling the conflicting demands of high Zn2+ ionic conductivity and low water content. Beyond their favorable mechanical properties, the as-prepared hydrogel electrolytes can induce flat grain-stacking zinc deposition, mitigate side reactions, and suppress polyiodide shuttling. Consequently, symmetric/asymmetric batteries and aqueous zinc–iodine batteries demonstrate much improved electrochemical performance. This work provides a reference for intricately designing hydrogel electrolytes for aqueous zinc metal batteries with specific functions by screening molecular structures of the components.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Yujie Huang,Jiahe Li,Haijun Wang,Tao Han,Wenrong Wang,Hanmei Jiang,Yong Zhou,Gaili Ke,Huichao He
Nanostructured WO 3 film photoanodes could achieve solar water splitting efficiently, through utilizing their structure advantages in light harvesting, carrier transfer, water molecules adsorption and dissociation. The establishment of suitable methods for the preparation of nanostructured WO 3 film photoanodes is highly essential for solar water splitting application. Herein, a facile candle-soot template-mediated method was developed to prepare nanoporous WO 3 films on FTO glass substrate. Through adjusting the solvent of precursor solution, the morphology of WO 3 films can be controlled optionally. Taken the resultant WO 3 films with different morphologies as photoanodes for solar water oxidation, higher activity, faster kinetics and better stability were achieved on the nanoporous WO 3 film photoanodes, relative to the dense-structure WO 3 film photoanodes. Among the resultant nanoporous WO 3 films, the optimal WO 3 (WO 3 -T/H 2 O+EtOH) film was prepared using a water/ethanol mixture as the precursor solution solvent. The water oxidation photocurrent of the WO 3 -T/H 2 O+EtOH film at 1. 23 V vs RHE was 0.39 mA/cm 2 , which was 3.5 times for the dense-structure WO 3 film photoanode. Meanwhile, the WO 3 -T/H 2 O+EtOH film photoanode had stable activity in sustained solar water oxidation reaction. Mechanism investigations revealed that the nanoporous WO 3 film photoanodes being of better water oxidation performance mainly ascribed to their nanostructure for harvesting more photons, easy achieving carrier transfer, beneficial water molecules adsorption and dehydrogenation oxidation.
研究领域:
材料科学
·
能源化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Regenerative Biomaterials
·
2021
·Vol. 8
·期 2
·
IF 6.353
Zhang Jianhua,Hu Junfei,Chen Baoshu,Zhao Tianbao,Gu Zhipeng
Wound healing dressing is increasingly needed in clinical owing to the large quantity of skin damage annually. Excessive reactive oxygen species (ROS) produced through internal or external environmental influences can lead to lipid peroxidation, protein denaturation, and even DNA damage, and ultimately have harmful effects on cells. Aiming to sufficiently contact with the wound microenvironment and scavenge ROS, superabsorbent poly (acrylic acid) and antioxidant poly (ester amide) (PAA/PEA) hybrid hydrogel has been developed to enhance wound healing. The physical and chemical properties of hybrid hydrogels were studied by Fourier-transform infrared (FTIR) absorption spectrum, compression, swelling, degradation, etc. Besides, the antioxidant properties of hybrid hydrogels can be investigated through the free radical scavenging experiment, and corresponding antioxidant indicators have been tested at the cellular level. Hybrid hydrogel scaffolds supported the proliferation of human umbilical vein endothelial cells and fibroblasts, as well as accelerated angiogenesis and skin regeneration in wounds. The healing properties of wounds in vivo were further assessed on mouse skin wounds. Results showed that PAA/PEA hybrid hydrogel scaffolds significantly accelerated the wound healing process through enhancing granulation formation and re-epithelialization. In summary, these superabsorbent and antioxidative hybrid hydrogels could be served as an excellent wound dressing for full-thickness wound healing.
研究领域:
生物材料学
·
医学
·
组织工程学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Yahui Du,Yuxi Chen,Zhihua Zhou,Cheng Wang,Junwei Liu,Xueqing Yang,Yuechao Chao,Huajie Tang,Yan Liang,Jianjuan Yuan,Shuqi Zhang,Qinglin Jia,Jinyue Yan
Freshwater scarcity poses a significant challenge to sustainable development for human beings. Seawater desalination has been considered as one of the promising technologies to offer the sufficient supply of freshwater. Solar-driven interfacial evaporation can enhance energy efficiency in desalination by localizing heat at the interface. However, most solar-driven interfacial evaporators struggle with long-term stability due to inadequate moisture transport and salt accumulation. Herein, a composite interfacial evaporator was developed by coupling polyurethane hydrogels with hydrophilic nano filter film. The composite evaporator exhibited superior and long-term evaporation performance compared to polyurethane hydrogels or polyurethane sponges alone due to optimal porosity and impurity filtration capabilities, which can jointly enable a stable evaporation rate of 3.2 kg/(m 2 ·h). The structural integrity and evaporation rates were well maintained over ten-day consecutive operation. Strikingly, modeling results revealed that the developed composite evaporator has the potential to produce enough freshwater to alleviate water scarcity in densely populated regions. Overall, this work showcases an effective and sustainable strategy for freshwater supply, characterized by improved water transport and enhanced salt resistance, highlighting its potential for application in underdeveloped and water-scarce regions.
研究领域:
材料科学
·
环境科学
·
水资源管理
✓ 已验证
DOI
高影响因子
POLYMER SCIENCE SERIES A
·
2023
·Vol. 65
·期 4
·358-368
·
IF 1
Tiantian Ren,Xu Yuanyuan,Wu Jianning,Meng Guihua,Yang Shengchao,Cui Lin,Liu Zhiyong,Guo Xuhong
Abstract Collecting water from the air could alleviate freshwater shortages in arid regions such as remote and inland areas. However, it is challenging to prepare adsorption materials that have high adsorption and desorption performance using straightforward synthesis routes for water harvesting applications. In this paper, a polydopamine (PDA)@Sodium polyacrylamide carboxymethyl cellulose (PAM-CMCNa)-calcium chloride (CaCl 2 ) composite aerogel (PDCA) with a vertical channel was prepared by salt template method and photopolymerization for atmospheric water collection (AWH). The designed vertical channel promotes the rapid transport of water molecules from the atmosphere to the interior of the hydrogel through capillary action. During this process, the hydrogel further expands to prevent the leakage of the internal salt solution, which effectively improves the water vapor adsorption and desorption by hydrogel. Experimental results showed that the hydrogel can absorb 2.78 g/g of water at 90% relative humidity (RH), where 56.3% of the captured water can be desorbed within 60 min of exposure under 1.0 sun light intensity. After 10 adsorption-desorption cycles, the PDCA still possesses excellent water sorption performance. The indoor water collection test showed that the water collection performance reached 2.143 kg/kg day at 90% RH and 25°C adsorption for 12 h and desorption for 6 h. The proposed method for the preparation of PDCA composites can achieve high water harvesting performance over a wide humidity range to enable solar-driven clean water production in remote areas.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2019
·Vol. 31
·期 10
·04019237
·
IF 1.984
Yongshan Tan,Hongfa Yu,Wanli Bi,Nan Wang,Na Zhang
A new type of material, magnesium oxysulfate cement (MOSC), has attracted widespread attention as an environmentally friendly and low-energy inorganic green cementitious material due to its outstanding performance. In this study, electrochemical impedance spectroscopy (EIS) and in situ X-ray diffraction (XRD) were used to characterize the hydration behavior and process of MOSC. EIS was also used to investigate the effect of fly ash (FA) on the hydration behavior of MOSC. Mercury intrusion porosimetry (MIP), backscattered scanning electron microscopy (BSE), and scanning electron microscopy (SEM) were used to study the evolution of the pore structure and micromorphology of MOSC incorporated with FA. The results show that the resistance values (?1) in the equivalent circuit for MOSC increase with increasing curing time. The incorporation of FA can affect the resistance values for each element in the equivalent circuit. In the early stages of hydration (1 day and 2 days), high-volume FA can reduce the degree of hydration of MOSC paste. At the later stages of hydration, the resistance values (?1) increase with increasing FA content. The MIP, BSE, and SEM results also show that the porosity of MOSC decreases with increasing FA content; the incorporation of FA can significantly improve the morphology of MOSC, resulting in a denser microstructure. This study shows that the electrochemical impedance spectroscopy is a powerful technique to investigate the hydration behavior and process of MOSC, and the results also indicate that FA is a good mineral admixture used as a partial substitute for MOSC cementitious materials.
研究领域:
材料科学
·
硅酸盐工程
·
建筑材料
·
无机非金属材料
·
绿色建材
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 10
·3373-3384
·
IF 2.5
Hu Xinyi,Kong Que,Li Rong,Zhou Change,Li Zhiguang
Making a multifunctional hydrogel-based wound dressing is a long-term research goal. Therefore, it is of great significance to develop an ideal wound dressing with desirable biocompatibility, adhesive property, antibacterial property and simple production. Herein, molecular network crosslinking hydrogels were achieved through the nucleophilic addition of polyphenol-sulfur radical using tannic acid and thioctic acid as matrix. The multifunctional tannic–thioctic acid (TATA) hydrogels with excellent rheological properties were prepared by further modification of antibacterial and hydrophobic properties. The successful cross-linking of the molecules was confirmed by infrared spectroscopy, Raman spectroscopy and energy dispersive X-ray spectroscopy (EDX). Complex hydrogels had certain hydrophobic properties, which can slowly absorb wound tissue fluid and keep the wetness of the wound. In addition, the hydrogel had good rheological, antibacterial and antioxidant properties, and also improved blood clotting effect and biocompatibility. These results indicated that TATA hydrogel had the potential prospect to be used as a novel wound dressing for a wide range of medical applications. Graphical abstract
研究领域:
生物材料
·
高分子科学
·
生物医学工程
·
伤口愈合
·
抗菌材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2017
·Vol. 25
·期 1
·215-220
·
IF 1.624
Chen Wu,Guo Qingyue,Yang Chunpeng,Hou Jin
Merlinoite(MER) zeolite membranes were synthesized on the outer surface of porous α-alumina tubular support by in-situ hydrothermal synthesis method without organic template. The synthetic MER zeolite membranes (sample 1, sample 2 and sample 3) were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX). The thickness of sample 2 without cracks is about 15 μm. The synthetic MER membrane which is mainly composed of Si, Al, O and K is typical merlinoite structure. The performance of sample 2 for potassium extraction in simulated seawater was researched by the membrane tube reactor. The continual ion-exchange reaction was carried out for 108 h at room temperature. The average exchange rate for K + ion was 32.8% and the average rejection rates for Na + , Ca 2+ and Mg 2+ ions were 93.4, 98.4 and 98.2% respectively. So the MER zeolite membrane (sample 2) has preference selectivity for K + ion and can be used as a potential inorganic membrane for potassium extraction from seawater.
研究领域:
材料科学
·
膜分离技术
·
资源回收利用
·
无机非金属材料
·
环境工程
✓ 已验证
DOI
高影响因子
AUSTRALIAN JOURNAL OF CHEMISTRY
·
2018
·Vol. 71
·期 6
·416-421
·
IF 1.059
Ouyang Dong,Zhihong Zhang,Zhenhai Fu,Xiang Li
A new phase-change material (PCM) CaCl2·6H2O + MgCl2·6H2O + NH4Cl was investigated in this paper. MgCl2·6H2O and NH4Cl were mixed with CaCl2·6H2O to obtain CaCl2·6H2O as a eutectic hydrate salt. The results show that the eutectic composition of the PCM is as follows: 90 wt- % CaCl2·6H2O, 6.25 wt- % MgCl2·6H2O and 3.75 wt- % NH4Cl; the undercooling degree is less than 1.5°C when the nucleating agent is 2 wt- % SrCl2·6H2O or 1.5 wt- % Ba(OH)2·8H2O. The phase-change temperature and latent heat are respectively 25.3°C and 144.3 J g−1 when the composition is 90 wt- % CaCl2·6H2O, 6.25 wt- % MgCl2·6H2O, 3.75 wt- %, NH4Cl, with 2 wt- % SrCl2·6H2O as nucleating agent, and 2 wt- % carboxymethyl cellulose as thickener. In addition, when the composition is changed to 90 wt- % CaCl2·6H2O, 6.25 wt- % MgCl2·6H2O, 3.75 wt- % NH4Cl, 1.5 wt- % Ba(OH)2·8H2O and 2 wt- % carboxymethyl cellulose, the phase change temperature and latent heat are 25.2°C and 139.3 J g−1, respectively.
研究领域:
材料科学
·
热能存储
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）