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
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环境科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Enmin Zong,Xiaohuan Liu,Lina Liu,Jifu Wang,Pingan Song,Zhongqing Ma,Jie Ding,Shenyuan Fu
Effective utilization of abundant industrial lignin has growingly attracted much attention besides potential environmental issues. Although chemical graft polymerization modification is one facile strategy for extending its applications, it remains an intractable challenge to select a highly efficient initiation system. We herein have attempt to understand the CaCl2–H2O2 system in initiating the graft polymerization of acrylic monomers onto acetic acid lignin (AAL) and biobutanol lignin (BBL). The initiation system is found to be highly efficient and selective, as proved by the successful graft of polyacrylates onto them, and a possible mechanism is also proposed. Thermal analysis shows that the graft modification results in a higher glass transition temperature and higher thermal stability of lignin. The graft modification make both AAL and BBL become more hydrophobic than before modification. Moreover, adding a small amount of lignin-graft-polyacrylate can considerably improve the UV blocking capability in addition to the reinforcing effect on polylactic acid. This work offers a novel, highly effective, and selective free radical initiation system for functionalizing lignin.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2025
·
IF 10.9
Yao Yu,Xiao Yang
Spent LiFePO 4 (LFP) battery black mass (SLFPB) recycling is important and faces significant challenges due to complex composition. This work presents a novel molten CaCl 2 -based leaching-electrolysis method for comprehensive valuable component recovery. This process yields recovery percentages exceeding 95 % for Fe, Cu, and P, 87 % for graphite, and 70 % for Al, while enriching Li in the melt. The molten salt shows potential for cyclic operation. Mechanistically, LiFePO 4 and FePO 4 in SLFPB react with molten CaCl 2 to form metal chlorides, Ca 5 (PO 4 ) 3 Cl, and Ca 2 PO 4 Cl intermediates, which subsequently dissociate into soluble ions. Most Fe escapes as FeCl 2 vapor. Graphite, due to its lower density, floats to the melt surface. The distinct thermodynamic properties of Fe 2+ , Cu + , and PO 4 3– allow their separation and recovery as metals and P 4 through two-step electrolysis. Differences in leaching and volatilization rates leads to the accumulation of Li. This approach provides a simple pathway for comprehensive SLFPB recycling.
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ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2024
·Vol. 46
·期 9
·1-20
·
IF 3.2
Yang Yonghao,Luo Zhihao,Wei Zuoan,Zhao Junkang,Lu Ting,Fu Tianbao,Tang Shuang
Tailings dust can negatively affect the surrounding environment and communities because the tailings are vulnerable to wind erosion. In this study, the effects of halides (sodium chloride [NaCl], calcium chloride [CaCl 2 ], and magnesium chloride hexahydrate [MgCl 2 ·6H 2 O]), and polymer materials (polyacrylamide [PAM], polyvinyl alcohol [PVA], and calcium lignosulfonate [LS]) were investigated for the stabilization of tailings for dust control. Erect milkvetch ( Astragalus adsurgens ), ryegrass ( Lolium perenne L.), and Bermuda grass ( Cynodon dactylon ) were planted in the tailings and sprayed with chemical dust suppressants. The growth status of the plants and their effects on the mechanical properties of tailings were also studied. The results show that the weight loss of tailings was stabilized by halides and polymers, and decreased with increasing concentration and spraying amount of the solutions. The penetration resistance of tailings stabilized by halides and polymers increased with increasing concentration and spraying amount of the solutions. Among the halides and polymers tested, the use of CaCl 2 and PAM resulted in the best control of tailings dust, respectively. CaCl 2 solution reduces the adaptability of plants and therefore makes it difficult for grass seeds to germinate normally. PAM solutions are beneficial for the development of herbaceous plants. Among the three herbaceous species, ryegrass exhibited the best degree of development and was more suitable for growth in the tailings. The ryegrass plants planted in the tailings sprayed with PAM grew the best, and the root-soil complex that formed increased the shear strength of the tailings.
研究领域:
环境科学
·
生态学
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DOI
PubMed
高影响因子
ENERGY & FUELS
·
2017
·
IF 3.091
Xiang Li,Yuan Zhou,Hongen Nian,Xinxing Zhang,Ouyang Dong,Xiufeng Ren,Jinbo Zeng,Chunxi Hai,Yue Shen
The present study prepared nanocomposite phase change materials (PCMs) based on calcium chloride hexahydrate (CaCl2·6H2O) with gamma aluminum oxide (γ-Al2O3) nanoparticles to characterize phase change behavior, such as the supercooling degree, phase change temperature, latent heat, thermal conductivity, and thermal stability. Results demonstrate that thermal conductivity and heat transfer of the CaCl2·6H2O/γ-Al2O3 nanocomposite PCMs are significantly enhanced and supercooling of CaCl2·6H2O/γ-Al2O3 nanocomposite PCMs is suppressed. Moreover, a 50 run cycling test verifies that the CaCl2·6H2O nanocomposite PCMs contained with 1 wt % γ-Al2O3 possesses enhanced thermal behavior. The degree of supercooling is within the range of 0.3–1.1 °C; the maximum reductions in the latent heat is 5.9%; and no phase segregation was observed. The CaCl2·6H2O/γ-Al2O3 nanocomposite PCMs presented acceptable thermal reliability, chemical stability, and heat transfer characteristics, thereby reflecting its acceptability for low-temperature solar thermal energy storage applications.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Fei-fei Liu,Guang-zhou Liu,Zhi-lin Zhu,Su-chun Wang,Fei-fei Zhao
Microplastics have become a major concern in recent years as they can be recognized as the transport vectors for pollutants in environment. In this study, the sorption behavior of two phthalate esters (PAEs), including diethyl phthalate (DEP) and dibutyl phthalate (DBP), onto three types of microplastics (PVC: polyvinyl chloride, PE: polyethylene, and PS : polystyrene) was investigated. The sorption isotherms of both DEP and DBP on microplastics were highly linear, suggesting that the partition was the main sorption mechanism. The K d values of DBP were much higher than those of DEP, demonstrating that hydrophobic interaction governed the partition mechanism. Sorption of the two PAEs on the three microplastics followed the order of PS > PE > PVC , indicating that chemical properties of microplastics played an important roles in their sorption behaviors. Solution pH and natural organic matter had no significant impact on PAEs sorption by microplastics. However, the presence of NaCl and CaCl 2 enhanced the sorption of both DEP and DBP because of the salting-out effect. The findings of the present study may have significant implications for the fate and transport assessment of both PAEs and microplastics.
研究领域:
环境科学
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化学
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污染研究
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Haichao Zhu,Hoi tong Ao,Yuli Fu,Chenming Zou,Ziyan Chen,Zhu Jin,Huawei Zhou,Bixi Sun,Shengrong Guo
Wound healing requires diverse functionalities in dressings, and conventional materials often fall short in water absorption and moisture regulation. Natural sodium alginate is popular in wound dressings due to its excellent film-forming ability, biocompatibility, ionic crosslinking, and pH responsiveness. However, it has limitations in physical stability and solubility in aqueous environments. This study enhanced alginate dressings by incorporating allantoin and treating with calcium chloride and citric acid to improve physicochemical properties and mechanical performance. Treatments for S2 to S5 prevented dissociation and maintained integrity, with suitable water absorption (363 %–442 %) and water vapor transmission rates (612.53–715.39 g × m 2 × day −1 ). The treatments also improved tensile strength (44.90–55.19 MPa). S2 had the highest migration ratio (52.71 %) of L929 cells and wound healing rates for mice skin (86.6 %), indicating that calcium chloride treatment is beneficial. All dressings (S1 to S5) exhibited low cytotoxicity against L929 cells and low hemolysis ratios, indicating good biocompatibility. Higher allantoin content improved wound healing efficacy. This study provides valuable insights for the design and development of alginate dressings in wound repair, expanding allantoin's application in wound healing.
研究领域:
材料科学
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生物医学工程
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药剂学
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DOI
PubMed
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Xiao Yang,Ribe Neil M.,Zhang Yage,Pan Yi,Cao Yang,Shum Ho Cheung
The solutal Marangoni effect is attracting increasing interest because of its fundamental role in many isothermal directional transport processes in fluids, including the Marangoni-driven spreading on liquid surfaces or Marangoni convection within a liquid. Here we report a type of continuous Marangoni transport process resulting from Marangoni-driven spreading and Marangoni convection in an aqueous two-phase system. The interaction between a salt (CaCl 2 ) and an anionic surfactant (sodium dodecylbenzenesulfonate) generates surface tension gradients, which drive the transport process. This Marangoni transport consists of the upward transfer of a filament from a droplet located at the bottom of a bulk solution, coiling of the filament near the surface, and formation of Fermat’s spiral patterns on the surface. The bottom-up coiling of the filament, driven by Marangoni convection, may inspire automatic fiber fabrication.
研究领域:
流体动力学
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材料科学
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表面化学
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DOI
PubMed
高影响因子
Case Studies in Construction Materials
·
2025
·
IF 6.6
Yibing Yu,Shaojun Zheng,Tianle Liu,Mingsheng Chen,Wenqiang Lou,Xi Wang
This study elucidates the hydration characteristics and durability modulation mechanisms of cement paste subjected to the combined influences of low-temperature curing and sulfate attack, focusing on the synergistic role of a CaCl 2 –BaCl 2 binary admixture system. CaCl 2 acted as a cryoprotectant, accelerating hydration under subzero conditions by promoting Friedel’s salt formation, which in turn enhanced early-age strength development. At an optimized dosage of 12.5 % CaCl 2 , the 54-day compressive strength exhibited an 86.99 % improvement compared with the control, verifying its hydration-promoting efficiency. The co-incorporation of BaCl 2 further contributed to durability enhancement through a dual-protection mechanism: externally, Ba 2 + reacted with SO 4 2- to form dense BaSO 4 barrier layers that hindered ionic penetration; internally, Ba 2+ consumed infiltrating SO 2- , suppressing the generation of expansive phases such as gypsum and ettringite. This process effectively alleviated sulfate-induced deterioration while simultaneously maintaining hydration continuity under freezing conditions. Although CaCl 2 addition facilitated faster ion migration during subzero curing, this effect diminished during subsequent ambient-temperature exposure, as hydration recovery occurred in reference samples. Nevertheless, excessive CaCl 2 led to structural degradation through dissolution channel formation and crystallization stress-induced microcracking, underscoring the importance of dosage control. Overall, the combined use of CaCl 2 and BaCl 2 was shown to significantly enhance both low-temperature hydration kinetics and long-term sulfate resistance. The findings provide valuable theoretical insight and practical guidance for the durability design of cementitious materials exposed to aggressive sulfate-bearing permafrost environments.
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高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-16
·
IF 36.3
Meng Na,Hu Yuen,Zhang Yufei,Cheng Ningbo,Lin Yanyan,Ding Chengfeng,Chen Qingyu,Fu Shaoju,Li Zhaoling,Wang Xianfeng,Yu Jianyong,Ding Bin
Highly permeable protective textiles (HPPT) with micro/nano-networks were fabricated using a non-solvent induced phase separation, synergistically driven by CaCl 2 and fluorinated polyurethane, combined with spraying technique.
The optimized HPPT exhibited excellent liquid repellency and air-moisture permeability properties due to the integration and cooperative drive of the low surface energy and the pore structure of the connectivity network, which can be used as desirable protective materials.
The formation mechanism of micro/nano-network structure was analyzed by molecular dynamics and observed by dynamic phase transition behavior, which numerically combined with theory illustrate the phase transition mechanism of HPPT.
研究领域:
材料科学
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纺织工程
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医疗防护
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表面化学
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产品关联
DOI
PubMed
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2023
·
IF 8.4
Xian He,Wanshui Yang,Xinsheng Qin
This study demonstrated the influences of ultrasound-assisted multilayer Pickering double emulsion capsules on the pasteurization and gastrointestinal digestive viability of probiotic (L. plantarum) strain liquid. Firstly, the role of ultrasonic homogenization on the morphology of W 1 /O/W 2 double emulsions were studied. The double emulsion formed by ultrasonic intensity at 285 W had a single and narrow distribution with smallest droplet size. The double emulsion particles were then coated with chitosan(Chi), alginate (Alg), and CaCl 2 (Ca). The multilayer emulsion after pasteurization and gastrointestinal digestion both had the highest viability at 5 coating layers, but its particle size (108.65 μm) exceeded the limit of human oral sensory (80 μm). It could be noted that the deposition of 3–4 layers of coating had similar activity after pasteurization/GIT digestion. And droplets with 3 layers of coating were the minimum and most available formulation for encapsulated probiotics ( L. plantarum ). Hence, the results suggest that the use of ultrasound-assisted multilayer emulsions encapsulated with probiotics in granular food and pharmaceutical applications is a promising strategy.
研究领域:
食品科学
·
制药技术
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生物技术
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DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 14
·3326
·
IF 3.2
Ruizhuo Liu,Zibo Lin,Shencheng Fan,Yao Cheng,Yuanyang Li,Jinsheng Li,Haiying Zou,Yongsi Chen,Liting Zheng,Jing Li
With the depletion of river sand resources and increasing environmental concerns, the development of alternative materials has become an urgent need in the construction industry. Waste concrete and non-waste concrete materials have been widely studied as alternatives to river sand. Although recycled concrete fine aggregates are close to natural sand in terms of mechanical properties, their surface cement adheres and affects the performance of cement, whereas non-recycled concrete fine aggregates perform superiorly in terms of ease of use and compressive properties, but there are challenges of supply stability and standardization. Red mud, as an industrial waste, is a potential alternative material due to its stable supply and high alkaline characteristics. In this paper, a new method is proposed for utilizing the cross-linking reaction between sodium alginate and calcium chloride by the calcium alginate-red mud microsphere preparation technique and the surface modification of red mud to enhance its bonding with cement. The experimental results showed that the mechanical properties of CMC-RM-SiO2-2.5% were improved by 13.9% compared with those of the benchmark cement mortar, and the encapsulation of red mud by calcium alginate significantly reduced the transfer of hazardous elements in red mud.
研究领域:
建筑材料
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环境工程
·
土木工程
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工业废物利用
·
材料科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）