SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Guoying Huang,Xiaomei Liu,Fangyin He,Jing Li,Pengbo Liu,Xinlu Jin,Yukun Li,Xinyi Zhang,Ziqiang Lei
Atmospheric Water Harvesting (AWH) represents a feasible technological approach for mitigating water shortages, offering a potential strategy for the global issue of water scarcity. This study uses ether extraction to explore the synthesis of keggin-type Heteropolyacid Phosphomolybdenum tungstic Acid (HPA). The unique properties of this heteropolyacid, such as strong acidity, high specific surface area combined with a hierarchical pore architecture, and electrostatic interactions, make it highly effective for water adsorption. By modifying the HPA, a new class of copolymer monomers (HPAs) was developed and then copolymerized with acrylic acid, resulting in the creation of a multifunctional polymeric material (HPAs-PAA) that has excellent biphasic water adsorption capacity to adsorb both water vapor and liquid water. The synthesized material has significant performance characteristics, with an adsorbent capacity of 1837 g/g of water vapor, a wide hygroscopic range (25 % RH-90 % RH), and a maximum water vapor adsorption capacity of 1381.8 mg/g at 90 % RH. Furthermore, under standard solar irradiation conditions of 1 kW/m 2 , the material demonstrates a desorption rate of 0.29 kg/m 2 /h, showcasing exceptional desorption performance. After 30 adsorption–desorption cycles, the HPAs-PAA retains 84.57 % of its initial capacity (from 951.6 mg/g to 804.8 mg/g), indicating remarkable water vapor adsorption–desorption cycle stability. Furthermore, the material exhibits excellent moisture retention capabilities and holding properties, rendering it an ideal adsorbent for AWH in arid environments. It also provides a new approach to developing sustainable water harvesting materials.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
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IF 9.4
Xiaomei Liu,Wenbin Ding,Tao Feng,Cailing Yang,Jing Li,Pengbo Liu,Ziqiang Lei
Atmospheric water harvesting through reticular materials is an innovation that has the potential to change the world. Here, this study offers a technique for creating a solar-powered hygroscopic polymer material for atmospheric water harvesting with the reticular materials. The results show that the porous hygroscopic polymer materials can achieve high performance with high vapor capture (up to ac. 28.8–49.7 mg/g at 28–38 %RH and 25 ℃), rapid photothermal conversion efficiency (up to 32.2 ℃ within 15 min under 1000 W/m −2 light at 25 ℃), a low desorption temperature (lower than 40 ℃), and an effective water release rate. Besides, the material also has excellent water-retention properties, which can effectively store desorbed liquid water in polymer networks for use by vegetation during water demand periods. The strategy opens new avenues for atmospheric water-harvesting materials, which will hopefully solve the global crisis of freshwater shortages.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
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2022
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IF 3.848
Xiaojun Yuan,Qi Wang,Qing Zhao,Zehua Bai,Chen Chen,Haifeng Xie
The activation of matrix metalloproteinases (MMPs) is responsible for degradation of the hybrid layer . The effect of 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) on biodegradation of the hybrid layer remains unknown. This study aimed to evaluate the effects of 10-MDP and its Ca salt on MMP-9 activity and dentin-bonding durability. 10-MDP-Ca salt was synthesized and characterized by X-ray diffraction (XRD) and nuclear magnetic resonance (NMR). The effects of chlorhexidine (CHX), 10-MDP, and 10-MDP-Ca salt on MMP activity were evaluated by in-situ zymography, MMP-9 inhibition assay, and hydroxyproline (HYP) assay. Dentin-resin bonded specimens were fabricated with using CHX or 10-MDP, including Single Bond 2 (Ctr), CHX + Single Bond 2 (CHX), 10-MDP + Single Bond 2 (10-MDP), and SBU (SBU). Micro-tensile bond strength (μTBS) and nanoleakage tests were performed after 24-h or two-years water storage. XRD and NMR confirmed the presence of 10-MDP-Ca salt. The relative inhibition percentages of recombinant MMP-9 for 10-MDP and 10-MDP-Ca salt were 8.04 ± 0.83% and 55.96 ± 1.82% respectively. HYP assay showed that 10-MDP, CHX, and 10-MDP-Ca salt conditioning decreased collagen degradation. Water storage weakened μTBS of all the groups, with the Ctr and CHX groups showing more significant decreases ( P < 0.05). After aging, the Ctr and CHX groups also presented more nanoleakage, and the CHX group showed more in-situ zymography fluorescence than the 10-MDP and SBU groups. The capacity to inhibit MMP-9 activity, decrease HYP release, and reduce nanoleakage of 10-MDP and its salt contribute to improvement of dentin-bonding durability.
研究领域:
牙科材料
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生物材料
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牙科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 36
·18546-18556
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IF 7.443
Kai Feng,Beibei Tang,Peiyi Wu
For a proton exchange membrane (PEM), the ratio of its proton conductivity to its fuel permeability usually defines the membrane selectivity. Generally, a highly selective PEM is preferred for application in direct methanol fuel cells. Herein, sulfonated SiO2@polystyrene core–shell (SiO2@sPS) nanoparticles were synthesized and then imbedded into a Nafion membrane by a blending–casting method. SiO2@sPS partakes in strong interactions with the Nafion polymer, which benefits its dispersion in the membrane matrix. The as-prepared SiO2@sPS + Nafion composite PEM presents a large increase in its proton conductivity owing to the introduction of additional –SO3H groups and hence has optimized channels for proton transport. Meanwhile, a reduced methanol crossover was also observed for the SiO2@sPS + Nafion composite PEM because of the formation of obstructed transport channels for bulk methanol. Besides this, a deep investigation on further enhancement of the membrane’s performance was conducted by etching the SiO2 core and hence forming well-dispersed uniform hollow spheres inside the membrane matrix. The intact hollow sulfonated PS spheres (h-sPS) acted as water reservoirs which in turn could gradually release water to hydrate the membrane under high-temperature and low-humidity conditions. Therefore, compared to the SiO2@sPS + Nafion membrane, the h-sPS + Nafion one presented a further increased proton conductivity at 100 °C under 40% RH. Meanwhile, h-sPS further suppressed methanol penetration by trapping it inside the hollow spheres. Herein, a “H2O donating/methanol accepting” mechanism was proposed for the first time, providing a promising platform to alleviate critical disadvantages of Nafion membranes and thereby fabricate highly selective Nafion-based PEMs.
研究领域:
材料科学
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化学工程
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能源技术
✓ 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）