CROP PROTECTION
·
2024
·
IF 2.5
Zhong-Yan Zhu,Xiao-Bao Wu,Jia-jia An,Qian-Qian Deng,Jun Wang,Li-Na Chen,Mao Ye
This investigation assessed the impact of calcium chloride (CaCl 2 ) seed priming on the direct and indirect defense mechanisms of rice ( Oryza sativa L.) against the brown planthopper (BPH), Nilaparvata lugens (Stål). Our findings revealed that seeds primed with CaCl 2 significantly curtailed the survival and developmental rates of BPH nymphs and diminished the honeydew secretion by adult females. The feeding behaviour of BPH on CaCl 2 -pretreated rice showed an extended non-proboscis handling (np) duration, while the phloem ingestion time (N4-b) and xylem ingestion time (N5) were reduced. Additionally, BPH nymphs exhibited a marked preference for H 2 O-pretreated plants over CaCl 2 -primed ones for both feeding and oviposition. Conversely, the natural enemy Cytorhinus lividipennis displayed a heightened preference for preying on BPH nymphs and eggs on CaCl 2 -primed rice. The treatment with calcium led to an increased release of a diverse range of volatile compounds following BPH infestation, compared to H 2 O pretreatment. Notably, the volatiles Methyl salicylate and 1-octen-3-ol were identified as the most effective deterrents for BPH and attractants for C. lividipennis , respectively, highlighting their potential role in mediating plant-insect interactions.
研究领域:
植物保护
·
昆虫学
·
农业科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiaxin Yang,Wenju Tao,Jiaming Li,Jingui He,Zhaowen Wang
Low-cost and efficient recycling methods are crucial for recovering strategic elements from lithium-containing waste electrolytes (LiWE), which are essential for energy storage and environmental protection. This study aims to develop a method for recovering lithium from LiWE through one-step calcination of CaCl 2 . Compared with the traditional high-temperature acidification roasting process, this low-temperature calcification only involves one-step roasting and low-temperature pure water leaching, which avoids the introduction of hazardous reagents such as acid/alkali. The thermodynamic analysis results indicate that the transition temperature of LiF during the calcification roasting process is higher than that of Na 3 AlF 6 . 550 ℃, 2.5 (Ca/Li ratio) and 1.0 h have been proven to be the most suitable roasting conditions. Meanwhile, 75 ℃, 7 mL/g (L/S) and 1.0 h are expected to be the most preferred leaching processes. The recovery rate of lithium exceeds 98 % and maintains a high purity (>99.0 %) of Li 2 CO 3 . The economic benefits of this process have been comprehensively evaluated, with a profit of 2.65 $/kg. Finally, the regenerated LCO prepared from recycled Li 2 CO 3 has been proven to have good electrochemical performance compared to commercial LCO with a capacity exceeding 151 mAh g-1 at 1C, demonstrating the feasibility of energy storage applications. In summary, the low-temperature calcification roasting method has been proven feasible for extracting lithium from LiWE.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 163
·期 3
·E33
·
IF 3.266
Liwen Hu,Yang Song,Jianbang Ge,Shuqiang Jiao,Jin Cheng
Molten CaCl2 has been considered as significant electrolyte for novel electrochemical metallurgy processes due to high solubility of oxygen anions. Some novel processes based on molten-salt electrolysis of oxides in molten chlorides have been proposed, typically including FFC process and OS process. An inert anode capable of sustained oxygen evolution is crucial for a green and efficient electrochemical de-oxidation process. Herein we report the results of a promising inert anode candidate, who shows an excellent performance. Several techniques including anodic polarization, cyclic voltammetry, Tafel polarization and electrochemical impedance have been performed to evaluate the anode behavior of the TiO2·RuO2 anode, revealing that the anode is quite stable during anodic polarization and has a more positive corrosion electrode potential. An in situ analysis of anode gases using the mass spectra proved the capability of the sustained evolution of oxygen at the TiO2·RuO2 anode during electrolysis, meaning that this oxides anode could be a potential candidate as inert anode in calcium chloride–calcium oxide melts for green metallurgical processes, as it showed a nearly negligible solubility of ruthenium dioxide when immersed in the melt and a low rate of corrosion even after long time electrolysis.
研究领域:
冶金学
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Zongyu Gao,Dexin Shan,Jiahong He,Tao Huang,Yuan Mao,Haiping Tan,Huiting Shi,Tingzhen Li,Taiping Xie
As every-one knows, cadmium contamination poses a significant and permanent threat to people and aquatic life. Therefore, research on how to remove cadmium from wastewater is essential to protect the natural environment. In this study, agricultural and forestry waste straw sprayed with selenium-enriched foliar fertilizer was prepared as biochar, which was altered by calcium chloride (CaCl 2 ) to remove Cd 2+ from water. The outcomes demonstrated that biochar generated by pyrolysis at 700 °C (BC700) had the best adsorption effect. Secondly, pseudo-second-order kinetics and Langmuir adsorption models were used to predict the Cd 2+ adsorption. Finally, electrostatic adsorption, ion exchange, and complexation of oxygen functional groups (OFGs) were demonstrated to be the main adsorption mechanisms. These conclusions indicate that selenium-rich straw biochar is a novel adsorbent for agroforestry waste recovery. Meanwhile, this work will offer a promising strategy for the overall utilization of rice straw.
研究领域:
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2021
·
IF 6.609
Jian Qiao,Duan Zhao,Yan-Yun Zhao,Wei Lu,Miao-Miao Li,Xiang-Ming Hu,Yun-Tao Liang,Fu-Chao Tian,Shuang Ju,Bing-Rui Yan
To reduce the effect of conventional halogen salt inhibitors on the performance of foaming solutions and extend the fire prevention and suppression time of water-based foams, herein, microencapsulation technology has been used in the preparation of inhibitors. Calcium chloride sustained-release microcapsule with ethyl cellulose as wall material was successfully prepared by solvent evaporation method. The microcapsule complied with Higuchi release kinetics equation. The experiment showed that the foaming solution added with 20 g microcapsules had almost the same foaming capacity as the pure foaming solution, and the foaming multiple could reach 14 times, and the half-life of the foam could reach 123 min. The foaming multiple was much higher than the foaming multiple of calcium chloride foam (0 times). Compared with calcium chloride foam, the new type of foam prepared in this paper has better inhibition ability, and the inhibition rate is as high as 83.8%. Ethyl cellulose used as wall material in microcapsules can soften covered coal in the process of heating up, isolate coal and oxygen, and thus inhibit coal and oxygen binding. The experimental results show that the temperature of T1 (84.6℃), T3 (338.2℃) and the cross-point temperatures of the coal sample treated with the new type of foam are higher than that of the coal sample treated with the calcium chloride foam. At the same time, the new type of foam can significantly inhibit the oxidation rate of methyl and methylene. It can be seen that the microencapsulation technology can improve the ability of the inhibitor foam.
研究领域:
材料科学
·
消防工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Current Research in Food Science
·
2022
·
IF 6.269
Kwame Eduam Baiden Frempong,Yan Chen,Lili Liang,Xiaoyan Lin
During post-harvest storage, the cell wall properties are closely associated with the physical, chemical, and biological properties of the fruit. The degradation of pectin in the cell walls and middle lamella is critical to these properties. The effects of calcium chloride (CaCl₂) and 1-methylcyclopropene (1-MCP) combined treatment on the pectin degradation, texture, and peel color of Eureka lemon were investigated during post-harvest storage. The in-situ light microscope analysis, rapid method, and FTIR test were used to investigate the spatial distribution, the pectin content, and its degradation. The results showed a reduction in pectin degradation, by 42 d the CaCl₂ and 1-MCP combined treated fruits presented a 36.7% pectin content loss which was lower than the control which was 48.3%. The treated fruits significantly exhibited enhanced textural properties, delayed weight loss, higher total acids, and improvement of other physicochemical properties in comparison to the control. The treatment deaccelerated the fruit peel color change from green to yellow and also had a better visual appearance on the final day. Overall, the results suggest that the control treatment for pectin degradation can reduce the fruit texture decline and peel color change and maintain a good visual appearance. The influence of pectin degradation on the texture and physicochemical properties of lemon provides a theoretical basis for fruit storage optimization, quality control, and shelf-life extension.
研究领域:
食品科学
·
植物生理学
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 23
·5542
·
IF 4.2
Xianbin Zhang,Zhongfeng Yang,Qian Wang,Weijie Chen,Tengjiao Liu,Tao Zhou,Shulin Li,Tongle Xin,Jie Cao,Xia Xin
Calcium halide-based fluids are often used in drilling and completion operations due to their high density, clay inhibition and low solid content. However, there is a lack of thickeners to promote gel strength, which improves the fluid’s capacity to carry and suspend cuttings. To solve this problem, the branched polymer (hereafter abbreviated as PAD-B) was prepared by the copolymerization of N,N-dimethylacrylamide (DMAM) and 2-acrylamide-2-methylpropane sulfonic acid (AMPS), using polyethylenimine as a branching agent and cerium ammonium nitrate as the initiator. Compared with linear polymer (PAD-L), PAD-B has better shear strength at the same low viscosity. The experimental results indicated that the increase in shear strength of PAD-B is due to the interactions between branched PAD-B molecules, which lead to the formation of a network structure. The effect of calcium chloride (CaCl2) on the rheological performance of PAD-B was investigated at 25 °C and 50 °C. Compared with PAD-L, PAD-B shows better thermal stability and calcium resistance. Its high gel strength provides technical support for addressing issues such as low yield point, gel strength and difficulty in controlling the rheological parameters of calcium halide-based fluids during the drilling and completion of complex wells.
研究领域:
石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Pigment & Resin Technology
·
2022
·Vol. 53
·期 2
·133-136
·
IF 1.126
Wenjun Wang,Luting Shen,Yinsong Si,Islam MD Zahidul,Azim Abdullaev,Yubing Dong
PurposeSodium alginate (Na-Alg) is a natural polysaccharide with a rich and renewable production that is widely used in the food, pharmaceutical and daily necessities industries, among other fields. The purpose of this study is to obtain a green and degradable shape memory material, calcium alginate (Ca-Alg) film was prepared and the mechanical properties, the shape memory effect of the film were investigated and confirmed.Design/methodology/approachThe Ca-Alg films were prepared by Na-Alg, calcium chloride (CaCl2) solution, and flow extension method. Dissolve sodium alginate powder, remove bubbles, pour into petri dish, dry at 60°C, add calcium chloride solution cross-linking and finally dry naturally. The effect of CaCl2solution concentration on the mechanical properties of the films were investigated and discussed by universal tensile tester. The shape memory behavior and degradation performance of thin films were verified and studied by the fold-deploy shape memory test and soil embedding method, respectively.FindingsThe Ca-Alg films exhibited good mechanical and shape memory properties, with a 72.2% shape memory fixity ratio and a 92.3% shape memory recovery ratio, respectively. For a period of 120 days, the film treated with a 6 wt% CaCl2solution degraded at a rate of approximately 53%.Research limitations/implicationsShape memory polymers (SMPs) as intelligent materials are an important research direction for the development of modern high-tech materials. On the other hand, plastic pollution is a major problem today; as a result, preparing green degradable SMPs is essential.Originality/valueThis study synthesized transparent and degradable shape memory Ca-Alg films using Na-Alg and CaCl2solution and the flow extension method.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 28
·15147-15158
·
IF 11.9
Yiming Bu,Xin Li,Weiwei Lei,Hongli Su,Hongjun Yang,Weilin Xu,Jingliang Li
Sorption-based atmospheric water harvesting (SAWH) followed by solar-driven desorption is emerging as a promising energy and cost-effective solution to alleviate the worldwide freshwater scarcity. To achieve efficient atmospheric water harvesting, a SAWH system with low water transfer resistance and high sorption–desorption kinetics that integrates photothermal properties is demanded. Herein, inspired by nature, a sodium alginate (SA)-based SAWH hemisphere with spatially centripetal conical channels loaded with CaCl2 crystals is designed. The device demonstrates unidirectional water transfer properties and high moisture absorption capacity. To enable solar-driven water desorption, the device is engineered with a photothermal layer by chelation of tannic acid (TA) with Fe3+. The multifunctional SAWH device with a special channel structure presents a superb water absorption of 0.90–2.29 g g−1 within a wide range of relative humidity (RH) (40–90%) and a fast solar-driven water desorption rate of 1.77 kg m−2 h−1 under one sun illumination. In outdoor tests, 82.3% of the water absorbed overnight could be released during the daytime under natural sunlight, achieving an ultrahigh daily water production of 3.72 L per m2 that is superior to that of most previously reported all-in-one SAWH systems. This proposed design strategy provides an effective solution for collecting water from the air by SAWH followed by solar-driven water desorption.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2025
·
IF 5
He Kaijun,Zhou Guanpeng,Li Yanyan,Shen Jiajia
Polyamide 11 (PA11) is a novel type of 100% bio-based and renewable fiber which can not achieve good dyeing results for conventional water bath dyeing techniques due to its smooth surface and long carbon chain hydrophobic structure. Furthermore, conventional dyeing processes typically involve extensive use of water and chemical reagents, driving up production costs and exerting serious ecological damage. The development of a new dyeing method suitable for bio-based PA11 fibers is crucial for sustainable development in the textile industry. In this study, we present a novel method for achieving effective dyeing of bio-based PA11 fibers using only dyes, calcium chloride (CaCl 2 ), and recyclable ethanol (EtOH), eliminating the necessity for additional chemical reagents. The dyeing process operates at a reduced temperature (80 ℃) and bypasses the pre-treatment stage for PA11. Compared to the traditional aqueous dyeing, the novel method significantly enhances dye uptake (> 98%) and color depth (K/S value) of PA11, while maintaining comparable color fastness ( ≧ grades 3–4), and acceptable mechanical properties. In addition, the new dyeing method has minimal impacts on the structure and performance of bio-based PA11 fibers. This is of great significance for the development and application of bio-based PA11 in the field of chemical fibers. Graphical abstract
研究领域:
纺织科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Jiahao Hu,Wenjin Luo,Yalong Li,Junbo Wang,Shouyuan Hu,Lihao Zhao,Ningyu Zhang,Pei Li,Jie Jiang,Liang Chen
Two-dimensional inorganic salt flakes have attracted increasing attention due to their unique properties and broad prospects for both experimental and industrial applications. However, fabricating these flakes under ambient conditions remains a significant challenge. Here, we present a novel approach for the facile preparation of thin, two-dimensional calcium chloride (CaCl 2 ) flakes on highly oriented pyrolytic graphite (HOPG) surfaces through solution-based treatment under ambient conditions. The ultrathin CaCl 2 flakes exhibited thicknesses ranging from 1.0 to 6.0 nm, with a predominant thickness of ∼1.5 nm. We further systematically explored the impact of various fabrication parameters, including ambient humidity, salt solution processing time, and pure water wetting duration, on the formation of distinct nanostructures. The ultrathin CaCl 2 flakes exhibit excellent stability under various environmental and vacuum conditions at different temperatures. Notably, piezoresponse force microscopy (PFM) measurements reveal that ultrathin CaCl 2 flakes possess piezoelectric properties. Owing to the poor mechanical and adhesive properties of 1.5 nm thick flakes, 4.0 nm thick flakes with enhanced stability were selected for reliable piezoresponse studies, yielding a piezoelectric coefficient of 21.4 p.m./V, exceeding that of most two-dimensional semiconductors. Furthermore, we show the broad applicability of this method by demonstrating that other halides, such as MgCl 2 and CuCl 2 , can also form similar ultrathin flakes. We attribute this phenomenon to the strong cation-π interaction between the cation and the aromatic rings of graphite, which drives the affinity between the cation and the HOPG surface, promoting the formation of ultrathin sheets. Our study provides a straightforward and innovative strategy for the fabrication of ultrathin halide salt flakes, offering valuable insights into the formation mechanism of carbon-based surface nanostructures, and opens new avenues for potential applications of these flakes in coatings, sensors, capacitors, and battery electrodes.
研究领域:
材料科学
·
纳米技术
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY AND BUILDINGS
·
2019
·
IF 4.495
Yong Li,Qianru Liu,Yanfeng Liu,Dengjia Wang,Wang Song,Yaowen Chen,Jiaping Liu
Development of phase change materials (PCMs) for thermal energy storage in building envelopes, is a promising method of energy utilization and retention. In the present study, three different kinds of nano-SiO 2 (NS) were introduced to CaCl 2 •6H 2 O to obtain form-stable phase change materials (FSPCMs) with favorable thermal properties and non-flammability. The results of leakage tests show that the maximum CaCl 2 •6H 2 O mass fractions in FSPCMs containing NS1, NS2 and NS3, were 75%, 73% and 70%, respectively. There were no chemical reactions observed between CaCl 2 •6H 2 O and nano-SiO 2 , and CaCl 2 •6H 2 O was uniformly dispersed in the pores and on the surfaces of nano-SiO 2 . Differential scanning calorimeter (DSC) results show a lower melting temperature for FSPCMs with smaller diameter nano-SiO 2 species, with latent heats equivalent to the calculated values based on the mass fraction of CaCl 2 •6H 2 O in the FSPCMs. Among the three types of FSPCMs, CaCl 2 •6H 2 O(75%)/NS1 FSPCM exhibited the highest latent heat of 148.2 J/g with a phase change temperature of 25.1°C. Thermogravimetric analysis and thermal cycling tests verified that FSPCMs possess good thermal stability and reliability. Smaller nano-SiO 2 pore diameter caused a downward shift in the thermal conductivity of FSPCMs. The results of thermal performance tests using a laboratory-scale test chamber, show that FSPCMs, in particular CaCl 2 •6H 2 O(75%)/NS1 FSPCM, effectively decreased the indoor peak temperature during the heating process and extended the duration of heat preservation during the cooling process, further supporting their valuable potential as candidates for use in building energy efficiency applications.
研究领域:
建筑材料
·
能源工程
·
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）