JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Yuanming Fu,Xianyang Meng,Ximei Liang,Jiangtao Wu
The density and viscosity of liquid 1-dodecanol and 1,12-dodecanediol were reported, which were obtained simultaneously by using a vibrating-wire viscometer. The measurements were determined at temperatures from 298.15 to 573.15 K for 1-dodecanol and 373.15 to 573.15 K for 1,12-dodecanediol and at pressures from 0.1 to 10 MPa. The combined expanded uncertainties (k = 2) of the reported data for density and viscosity were estimated to be 0.26% and 2.1%, respectively. The density and viscosity data obtained in this work were correlated with the Tait-type equation and Andrade–Tait equation, respectively. The average absolute percentage deviation of the density data from the correlations were 0.08% for 1-dodecanol and 0.06% for 1,12-dodecanediol, and the average absolute percentage deviation of the viscosity data from the correlations were 0.64% for 1-dodecanol and 0.67% for 1,12-dodecanediol. The correlations were also used to compare the present results with the available literature data. An acceptable agreement between the present results and the literature data was observed. Finally, the derived properties of isobaric expansibility and isothermal compressibility were derived based on the Tait-type equation of this work.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
·
2019
·Vol. 40
·期 10
·943-950
·
IF 0.602
Wenfei Zhao,Xu Jing,Mingchang Chang,Junlong Meng,Cuiping Feng
In this research, a novel method—namely vortex-assisted emulsification microextraction—was introduced for the determination of pyrethroids (flucythrinate, beta-cypermethrin, and fenvalerate) in mushrooms ( Agaricus bisporus , Lentinula edodes , Auricularia auricular , and Flammulina velutiper ). A green solvent 1-dodecanol was used as the extraction solvent. The low freezing point makes 1-dodecanol easy to solidify and separate after retention in an ice bath. To avoid the use of dispersion solvents, vortex agitation was applied instead to increase the contact area between extraction solvent and samples. The type and volume of extraction solvent, time of extraction, and addition of sodium chloride were optimized. Under optimal conditions, linear responses were obtained within 1–100 μg/g ( R 2 ≥ 0.999). The extraction recovery was within 70.2–89.2% with relative standard deviations of less than 8.1%. This method was simple, fast, and environmentally friendly, and was successfully applied to extract and analyze pyrethroids in Agaricus bisporus , Lentinula edodes , Auricularia auricular , and Flammulina velutiper .
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 27
·3318-3324
·
IF 3.1
Hongyu Chen,Mingshuo Liu,Jianing Wang,Yunfei Wang,Yajuan Wang,Wenyan Liu
Due to their excellent optical and electrical properties, all-inorganic metal halide perovskite CsPbBr3 quantum dots (QDs) have become one of the most promising materials in the field of optoelectronics during recent years. However, the stability of CsPbBr3 QDs limits their practical application and further development to a certain extent. In order to improve their stability, CsPbBr3 QDs were modified with 2-n-octyl-1-dodecanol for the first time in this paper. The 2-n-octyl-1-dodecanol-modified CsPbBr3 QDs were prepared by the ligand-assisted reprecipitation (LARP) method at room temperature in an air environment. Then the stability of the samples was tested at different temperatures and humidity. When the humidity was 80%, the photoluminescence (PL) intensity of both unmodified and modified CsPbBr3 QDs increased to different degrees because the appropriate amount of water changed the crystallization environment. The PL intensity of the modified QDs increased, and the peak positions were basically not shifted, proving that they did not agglomerate. Thermal stability test results showed that the PL intensity of the 2-n-octyl-1-dodecanol-modified QDs could still maintain 65% of the original intensity at 90 °C, which is 4.6 times that of the unmodified CsPbBr3 QDs. Experimental results show that the stability of CsPbBr3 QDs is significantly improved after 2-n-octyl-1-dodecanol modification, which demonstrates the excellent surface passivation of CsPbBr3 QDs by 2-n-octyl-1-dodecanol.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 21
·9114-9120
·
IF 1.821
Mingzhu Hu,Lijie Wu,Ying Song,Zhanchao Li,Qiang Ma,Hanqi Zhang,Ziming Wang
Microwave-assisted liquid–liquid microextraction based on solidification of floating organic droplet (MA-LLME-SFO) was first developed and applied to the extraction of triazines in honey samples. 1-Dodecanol, which is of low toxicity, low density and has an appropriate melting point near room temperature, was chosen as the extraction solvent. Furthermore, traditional organic dispersive solvents were avoided in this method with the aid of microwave irradiation. Several experimental parameters, including the type and volume of extraction solvent, microwave power and irradiation time, pH of the sample solution, ionic strength and centrifugation rate were investigated and optimized. The proposed method showed a good linearity within the range of 5.00–250.00 μg kg−1 with the correlation coefficients ranging from 0.9994 to 0.9998. The limits of detection for cyanazine, desmetryn, terbuthylazine and dimethametryn were 1.39, 0.95, 1.20, and 1.07 μg kg−1, respectively. The recoveries of the analytes ranged from 74.84 to 112.74% and the relative standard deviations were lower than 13.10%, when the present method was applied to the analysis of real samples.
研究领域:
分析化学
·
食品科学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Dengji Xu,Wanyu Shen,Shiqi Sun,Yanjun Chen,Zhumao Lu,Xiaokai Meng,Chao Wang,Li Guo,Changcheng Liu,Que Huang
The purpose of this study is to explore a new clean and environment protecting composite microcapsule material with 1-dodecanol (DD) as the core and modified methylated melamine-formaldehyde (MMF) as the shell, to meet the needs of low temperature heat or energy storage (0–40 °C). The microencapsulated phase change material (MPCM) base with a mass ratio of 14:3 was synthesized by in-situ emulsion polymerization , then two kinds of additives 10 wt% boron nitride (BN) and 5 wt% BN mixed with 5 wt% carbon nanotubes (CNTs) were applied to solve the defects of easy leakage and low thermal conductivity , while the samples were defined and shorted as BPCM and BCPCM, respectively. The experimental results showed that the prepared BCPCM presented good storage stability in the temperature range of 0–40 °C, which was due to its good thermal conductivity of 0.584 W/m·K, latent heat of 163.8 J/g, and strong supramolecular interaction between 1-DD and MMF. Through charging and discharging tests for batteries under low temperature, BCPCM indicated excellent thermal management performance, which proposed its application potential in the cryogenic storage environments and battery thermal management system (BTMS) field.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 6
·期 12
·125376
·
IF 1.929
Sainan Wu,Pan Zhang,Zhilong Xu,Zhang Chen,Yanfeng Gao
A series of microencapsulated phase change materials (microPCMs) are synthesized by encapsulating 1-dodecanol into cellulose nanofibers (CNFs) modified melamine-formaldehyde (MF) resin through in situ polymerization. The chemical structure and crystallography of the microcapsules are characterized by Fourier-transform infrared spectroscopy (FT-IR) and x-ray diffraction (XRD). Scanning electronic microscopy (SEM) images show that the obtained microcapsules are regularly spherical with smooth surface and an average diameter about 1∼3 μm. The cracking ratio test indicates that the addition of CNFs largely enhances the mechanical strength of the microcapsules, and the CNFs/MF-microPCMs (with 3.4 wt% CNFs) have a phase change enthalpy of 100.4 J g−1. Furthermore, the simulation result demonstrates that the indoor temperature modulation ability of CNFs/MF-microPCMs model house is 4.2 °C, which is more than that of model house without microPCMs under room temperature. These results indicate that CNFs/MF-microPCMs are potential candidates for thermoregulating applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Bao Jin,Naizhou Du,Ting Meng,Guangyan Chen,Yuwei Cao,He Zhang,Yongyong He,Xiaowei Li,Chenhui Zhang,Xiaohui Yu,Qingdao Zeng,Jianbin Luo
Superlubricity refers to the state in which friction and wear almost disappear in the interface. Phase transition structural superlubricity (PTSS) is the superlubricity state achieved in liquid-solid interface by contact stress inducing liquid-solid phase transition of the lubricating medium. However, thus far, the maximum Hertz contact stress of PTSS currently realized is only approximately 600 MPa. In this study, PTSS with Hertz contact stress up to 1.313 GPa was achieved at the liquid-solid interface by constructing in situ heterojunction between the solid phase 1-dodecanol molecular layer and the graphene crystalline boundary tribofilm. By covalently modifying graphene with polydopamine, the adsorption capacity of graphene and SiC substrate was significantly enhanced, leading to the growth of crystalline boundary tribofilm with a thickness of 180∼200 nm. In addition, when the contact stress is greater than 137 MPa, 1-dodecanol will undergo liquid-solid phase transformation phenomenon. Solid phase 1-dodecanol molecules self-assemble to form a herringbone-like configuration by forming hydrogen bonds between the hydroxyl groups. These insights provide a novel method for realizing structural superlubricity and bridge the realms of solid superlubricity and liquid superlubricity.
研究领域:
材料科学
·
表面工程
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 13
·1329-1334
·
IF 3.532
Beiqi Wu,Yu Niu,Xinyuan Bi,Xiaowen Wang,Liyan Jia,Xu Jing
A rapid and convenient analytical procedure (evaporation-assisted dispersive liquid–liquid microextraction with solidification of floating organic droplets) is advanced for determining the concentrations of triazine herbicide residues (e.g. simazine and atrazine) in fruit juices via HPLC-DAD. The technique involves adding 1-dodecanol (low density) and dichloromethane (high density) to the test solution to act as the extraction and volatile solvents, respectively. Calcium oxide is added to generate heat to accelerate the evaporation of dichloromethane, whereupon the 1-dodecanol quickly disperses into small droplets to complete the microextraction process. Thus, there is no need to use a dispersive solvent and heating equipment is also not required. The floating 1-dodecanol is subsequently frozen using an ice bath to facilitate its separation from the sample. Under optimal conditions (250 μL of 1-dodecanol (extraction solvent), 150 μL of CH2Cl2 (volatile solvent), 1250 mg of CaO, and an extraction time of 60 s) the detection procedure is linear over the range 0.05–5 μg mL−1 (with R > 0.99). The limits of detection (LOD) and quantification (LOQ) were determined to be 0.0022–0.0034 μg mL−1 and 0.0073–0.0113 μg mL−1, respectively. The recovery of simazine and atrazine in three fruit juices ranged between 78.5% and 96.4% with a relative standard deviation <8.2%. Therefore, the proposed approach can be effectively adopted to analyze the triazine herbicide content in fruit juices. The method has been proved to be simple, reliable, and remarkably efficient.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Yinjie Dai,Huiqi Guo,Xiaoyun Lei,Jingpu Tang,Ting Huang,Chenchen Lin,Xiaoping Wu
The present study proposes a facile fabrication of a phosphate-functionalized monolithic extraction column via radical polymerization within an ionic liquid (IL) porogenic system, with the objective of enriching microcystins (MCs). The synthesis employed bis[2-(methacryloxyethyl)] phosphate (BMEP) as the affinity monomer, methacryloxypropyl polyhedral oligomeric silsesquioxane (POSS-MA) as co-monomer, poly(ethylene glycol) diacrylate (PEGDA, Mn∼575) as crosslinker, and azobisisobutyronitrile (AIBN) as initiator. The structural and morphological properties of the resulting monolith were systematically investigated using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and nitrogen adsorption-desorption isotherms. It is evident that the use of [C 8 mim,BF 4 ] IL enhances the solubility of monomer and accelerates polymerization rate. The incorporation of phosphate group and rigid POSS skeleton endows the hybrid monolith with specific phosphate-guanidine recognition, hydrophobic interaction, hierarchical porous structure, and good mechanical stability, thereby enabling high extraction efficiency and fast mass transfer to MCs. Under the optimized conditions, the as-prepared monolith was utilized for capillary microextraction (CME) of MCs in surface waters, prior to their analysis by HPLC-MS. The analytical performance validation revealed sub-ppt detection limits (0.83–1.12 ng l -1 ) with satisfactory recoveries (73.4–119 %) and relative standard deviations of 1.0–7.3 %. These findings thus demonstrate the advantage of phosphate-functionalized monoliths in application-specific CME.
研究领域:
分析化学
·
环境科学
·
材料科学
·
色谱与分离科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2025
·Vol. 15
·期 12
·1439
·
IF 2.8
Yumeng Zhang,Chao Gu,Hong Li,Dechuan Li
Au–ZnO heterogeneous nanoparticles (NPs) were successfully synthesized, and the intrinsic correlation between their spectral evolution and interfacial growth mechanism was systematically elucidated. With increasing Au content, the SPR absorption peak of Au exhibits a pronounced red shift, while the defect-related emission of ZnO is suppressed and the band-edge emission becomes broadened. These spectral variations are closely coupled with the interfacial growth process. Interfacial electron transfer and the formation of a Schottky barrier induce charge redistribution within ZnO and reduce oxygen vacancies, enabling ZnO to preferentially nucleate on the Au surface and subsequently evolve into a pyramidal structure. The resulting morphological transformation further enhances electron depletion and plasmonic coupling, lowering the effective plasmonic energy of Au and deepening the SPR red shift. Quantitative analysis based on Mie theory shows that approximately 12% of the free electrons in Au participate in interfacial transfer, confirming the cooperative role of strong electronic coupling in governing both growth dynamics and optical responses. This study provides deeper insight into the photophysical mechanisms of Au–ZnO heteronanocrystals and offers guidance for designing noble metal–semiconductor composites with tunable optoelectronic properties.
研究领域:
纳米材料
·
等离激元学
·
光电子学
·
异质结构纳米粒子
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2026
·
IF 10
Mengyao Qi,Zhenkai Luo,Hang Liang,Weijun Peng,Wei Wang,Yijun Cao,Longyu Zhang,Yukun Huang
To address the technical bottleneck of declining hydrophobicity in finely ground minerals that leads to low recovery of traditional hydrocarbon oil collectors, this study utilized computational simulations to design and synthesize a novel collector. Simulation calculations showed that dodecyl xanthogenic acid (DXA-C12) had a comprehensive adsorption effect on both the “basal” and “edges” of molybdenite. Micro-flotation tests showed that DXA-C12 had significant flotation advantages for micro-fine grained molybdenite compared with the traditional kerosene and xanthate combined collector. DXA-C12 interacted with the “basal” and “edges” of molybdenite through hydrophobic and chemical forces, respectively. The DXA-C12 carbon chain drove the interaction with the “basal” and adsorbed in a tiled form. In contrast, C=S supplied electrons to the Mo atoms in “edges”, forming adsorption in an upright form. For the actual micro-fine grained molybdenum ore with a particle size of −38 μm accounted for 97 % and Mo grade of about 4.00 %, using DXA-C12 as the collector could obtain the concentrate with Mo grade and recovery of 39.099 % and 99.68 %, respectively. The study provided a novel collector for micro-fine grained molybdenum ore, and had an important reference significance for the development of other new types of collectors.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Jingyi Zhu,Yuzhi Tang,Jie Zhou,Zhaozhong Yang,Jiayu He,Jin Zhang
Deep carbonate reservoirs are rich in oil and gas reserves, but high-temperature and deep-burial conditions may cause conventional retarded acid to fail, thereby reducing acid stimulation efficiency. To address these challenges, microcapsule acids with high thermal stability, strong acid resistance, and delayed release capability were prepared. Methyl methacrylate and N-methylolacrylamide copolymer were selected as the shell material, and microcapsule acids capable of withstanding temperatures up to 180°C were synthesized via the interfacial polymerization method. Optimized parameters for mini-emulsion preparation and the interfacial polymerization process improved the uniformity of microcapsule particle size. The particle size and its distribution, micro-morphology, and shell material properties of the microcapsule acids were characterized by laser particle size analysis, infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry, and thermogravimetric analysis. The experimental results showed that the average particle size of the microcapsule acids prepared by the interfacial polymerization method was 321.7 μm, with most particles distributed between 200 μm and 400 μm, exhibiting uniformity and good dispersibility. Thermal analysis indicated that the shell material maintained its structural integrity under high-temperature conditions of 180°C. Suspension tests demonstrated that the microcapsule acids could achieve long-distance transport in clear water and be evenly distributed in the formation. Acid release experiments confirmed that these microcapsule acids could achieve delayed release. These results further indicate that the microcapsule acids have broad application potential in acid fracturing of deep carbonate reservoirs.
✓ 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）