INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Fengqin Li,Jingjie Zhou,Yuqi Liu,Jinyuan Sun,Ke Zhang,Huibin Liang,Chunyu Wang,Tao Geng,Riccardo Tesser,Vincenzo Russo,Martino Serio
The reaction of butylene oxide with fatty alcohols produces interesting products for the surfactant industry; however, no detailed study on the kinetics of this reaction can be found in the literature. In this paper, the kinetics of butoxylation of dodecanol catalyzed by KOH was deeply investigated. An orthogonal design approach was used to determine the optimum reaction conditions, which were analyzed in conjunction with the residues of fatty alcohols and epoxidized butanes by using a combined metric analysis. On this basis, BO solubility was measured and finally compared with the UNIFAC model, and it was found that the kinetics of epoxidized butane was modeled in the same way as the ethoxylation and propoxylation of primary fatty alcohols. It is concluded that the alkoxylation reaction rate decreases mainly with the increase in the steric hindrance of the employed epoxide. Finally, the models and data in this paper can be used for industrial reactor design and production optimization.
研究领域:
化学工程
·
表面活性剂工业
✓ 已验证
产品关联
DOI
高影响因子
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
ACS Sustainable Chemistry & Engineering
·
2015
·
IF 4.642
Haiyue Gong,Mutai Bao,Guilu Pi,Yiming Li,Aiqin Wang,Zhining Wang
Effective emulsification of oil in seawater plays an important role in the marine oil spill remediation process. The negative effects of chemical surfactants have necessitated a search for alternative dispersant that are sustainable and environmentally friendly. After modifying with dodecanol, petroleum hydrocarbon degrading bacteria, Bacillus cereus S-1, was elucidated to produce an extremely stable oil-in-water (o/w) Pickering emulsion, just liking a solid particle emulsifier. In an appropriate concentration range, the presence of dodecanol improved the surface hydrophobicity and wettability of bacterial cells, which was responsible for their adsorption at the oil–water interface. When a sufficient amount of bacteria was added, only a small amount of dodecanol was required to obtain stable emulsions. However, stable emulsion was not prepared with unmodified Bacillus cereus S-1 cells. Scanning electron microscopy (SEM) and confocal laser scanning microscope (CLSM) images indicated that the effective emulsification was attributed to the formation of a dense bacterial interfacial film around oil drops, providing a steric barrier to impeding droplet coalescence. For application in emulsification of crude oil in seawater, the dodecanol-modified bacterial cells (DMB) were still very effective. In addition to emulsification, DMB remarkably facilitated the oil biodegradation compared to bacterial cells alone. By combining the emulsification and biodegradation of sustainable hydrocarbon degrading bacteria, this work showed a novel strategy for developing an alternative, environmentally friendly remediation technology for marine oil spills.
研究领域:
微生物学
·
环境科学
·
海洋生物学
✓ 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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yuxin Zhao,Weixin Zheng,Jinmei Dong,Ruguang Li,Chenghui Sheng,Jing Wen,Chenggong Chang
Expanded perlite (EP) has been utilized as an adsorbent material in the energy-saving field. However, its practical application has been limited by the inherent characteristic of low thermal conductivity. To overcome this drawback, this study employed organic gel solvent impregnation to achieve in-situ carbonization of EP, resulting in the development of EP carbon material (EPC) composites. Utilizing the porous structure's surface adsorption and capillary action, the EPC composites were utilized as excellent supporting materials to prepare dodecanol(DD)/expanded perlite carbon layer phase change materials (DEPC). The results indicated that the DEPC exhibited good chemical stability, thermal stability, excellent thermal conductivity, and thermal performance. The thermal conductivity of the DEPC composites reached 1.244 W/(m·K), which was several times higher than that of the dodecanol/expanded perlite (DEP) composites. The melting temperature and latent heat value during the melting process were 26.4 °C and 179.56 J/g, respectively. Furthermore, during the solidification process, the temperature and latent heat value were 20.2 °C and 167.32 J/g, respectively. Remarkably, even after 300 melting/solidification cycles, the DEPC composite maintained excellent thermal reliability, suggesting a broad application potential in the field of low-temperature energy storage in the future.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Renewable Materials
·
2020
·Vol. 8
·期 3
·289-300
·
IF 1.341
Li Qiaoguang,Gong Sheng,Yan Jie,Hu Hongchao,Shu Xugang,Tong Hanqing,Cai Zhiye
The plasticizer is an important polymer material additive. Non-toxic and environmentally friendly plasticizers are developed recently in order to decrease fossil fuel reserves, serious environmental pollution and the toxicity of phthalate esters. In this study, a new, efficient and
environmentally friendly plasticizer of hydrogenated rosin dodecyl ester was prepared by an esterification reaction of hydrogenated rosin and dodecanol. The influences of different reaction conditions (including different catalysts, the catalyst concentration, the ratio of the reactants, reaction
temperature, and reaction time) on the esterification yield are examined and discussed. Hydrogenated rosin dodecyl ester with 71.8% yield was synthesized under the optimized reaction conditions (1:0.8 molar ratio of rosin to dodecanol, 1 mol% tetrabutyl titanate concentration, and 210°C
for 6 h). The esterification reaction is a second-order reaction, and kinetic calculations showed that the activation energy is 39.77 KJ·mol–1. The structure of the hydrogenated rosin dodecyl ester was confirmed by FT-IR spectroscopy and 13C NMR spectrum.
Besides, the thermal stability of target product (hydrogenated rosin dodecyl ester) was also tested by thermal gravimetric analysis (TGA), which showed a good thermal stability.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2021
·
IF 6.141
Jingxuan Cai,Chunmei Zhang,Li Zeng,Hao Xu,Jia Wang,Kaiqiang Liu,Xiaowei Cheng
Encountering natural gas hydrate (NGH) is inevitable in the process of drilling and the production of oil and gas wells in deep-sea and shallow formations. The heat released by the cement slurry during the hydration process will cause the decomposition of gas hydrates, which will lead to annular channelling. Our purpose is to improve the cementing quality and ensure the safety of oil and gas production. In this paper, temperature control phase change microcapsules (PCMCs) with dodecanol (DA)/n-decanoic acid (CA) composite phase change materials (PCMs) as the core and active silica as the shell were prepared by a chemical precipitation method to store and release heat reversibly, to reduce the hydration heat of cement and improve the early strength. Fourier infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy spectrometry (EDS) were used to test and analyse the chemical structure and microscopic morphology of the synthesized temperature-controlled phase change microcapsules. Differential scanning calorimetry (DSC) was used to determine the phase change characteristics of the phase change microcapsules. The thermal stability of the phase change microcapsules was measured by a thermogravimetric analyser (TG). The application of PCMCs in a low-temperature cement slurry was also investigated. The results showed that the synthesized microcapsules had good thermal stability with a phase transformation temperature of 12.4 ℃ and enthalpy of 1.65 J/g. PCMCs can effectively control the hydration heat of cement and reduce the rise of hydration temperature by 6.06% to 11.79%. In addition, PCMCs can slowly release heat to promote the hydration of cement in the later strength development, and improve the early compressive strength of cement in the range of 5 ℃ to 10 ℃.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Li Feng,Shunping Dong,He Zhou,Lijun Yang,Fen Yuan,Yibin Yang,Jingxin Lei,Lixia Bao,Longchun Bian,Jiliang Wang
It is still a big challenge to obtain shape-stabilized nanoencapsulated core-shell phase change materials (NC-PCMs) with the encapsulation ratio up to 90 wt% via surfactant-free method due to the lack of novel nanoencapsulation method and related mechanism. Herein, we for the first time report a novel supramolecular lock shell layer technique without surfactant to facilely prepare shape-stabilized NC-PCMs with the encapsulation ratio range of 70–90 wt%. To this aim, amphiphilic macromolecular nanoreactors with the particle size of ~15 nm were firstly synthesized. n-Dodecanol as the heat storage core was then self-assembled into the nanoreactors under ultrasonification. A thin layer of crosslinked acrylates copolymers was prepared by in-situ grafting polymerization to further stabilize the potentially leaked n-dodecanol. Crystalline structure, morphology, and thermal behavior of the resulting NC-PCMs were extensively investigated. Relevant results indicate that the obtained NC-PCMs fluids show excellent storage stability in the temperature range of −50 to 50 °C, benefiting from their small particle size (60–90 nm) and intense supramolecular interactions between n-dodecanol and the prepared nanoreactors. Phase change temperature of the produced NC-PCMs is very close to that of neat n-dodecanol, no obvious supercooling phenomena have been detected for the produced NC-PCMs. The maximum encapsulation ratio, latent heat, and thermal conductivity of the shape-stabilized NC-PCMs approximate 90 wt%, 180 J g −1 , and 0.1705 W m −1 K −1 , respectively, implying large potential application in the sectors of solar energy storage, waste heat management etc. The developed supramolecular lock-layer technique probably opens a new avenue in the search for NC-PCMs with ultrahigh mass content of core layer.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Thermal Science and Engineering Progress
·
2023
·
IF 4.8
Guanhua Zhang,Licheng Chen,Wei Lu,Zhigen Wu
Based on the temperature range of medical and food logistics (0 ∼ 8℃), Developed a cold storage material consisting of tetradecane, capric acid, and dodecanol, known as tetradecane-dodecanol-decanoic acid material (TDDA). The latent heat transition temperature and thermal conductivity of the resulting TDDA were determined as 258.3 J/g, 1.1 °C, and 0.201 W/(m·K), respectively. TDDA/EG was then obtained by adding expanded graphite (EG) to improve thermal conductivity and prevent leakage. The resulting TDDA/EG exhibited excellent cycling stability after 500 thermal cycles. The temperature change of vaccines in the cold storage box was analyzed through simulated body fluid cold storage box experiments. The average cold preservation time in the cold storage box with TDDA/EG material lasted 37.8 h, a value 50.4-fold higher than that of the cold box without TDDA. Overall, TDDA/EG phase change cold storage materials have good application prospects for temperature-sensitive products in cold chain logistics, such as vaccines.
研究领域:
材料科学
·
生物医学工程
·
冷链物流技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2016
·
IF 2.835
Lixia Geng,Shuangfeng Wang,Tingyu Wang,Ruilian Luo
A novel nanencapsulated phase change material (NEPCM) was fabricated via the self-assembly method with n-dodecanol as the core and SiO2 derived from sodium silicate as the shell. The as-prepared nanocapsules with different core/shell ratios were investigated systematically. Scanning electron microscopy and transmission electron microscopy photographs indicated that the products had a nearly spherical and compact surface with nanometer size. Fourier transform infrared spectroscopy and X-ray diffraction confirmed that SiO2 was successfully encapsulated upon n-dodecanol. Differential scanning calorimetry results showed that the NEPCMs exhibited similar phase change characteristics to pristine n-dodecanol, which melted at 21.03 °C with a latent heat of 116.7 J/g and solidified at 19.58 °C with a latent heat of 114.6 J/g. Thermogravimetric analysis and thermal cycle tests revealed that the nanocapsules had good thermal stability. In conclusion, the prepared nanocapsules have great potential for thermal energy storage and building energy conservation as a result of their facile synthesis process, low cost, and excellent thermal properties.
研究领域:
材料科学
·
能源工程
✓ 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
Materials Research Express
·
2020
·Vol. 7
·期 9
·095501
·
IF 1.929
Ruijie Jiang,Lingling Xu,Nan Wu
Nontoxic, low-cost microcapsule phase change materials (MicroPCMs) were successfully manufactured via suspension polymerization, in which n-dodecanol was employed as the core material and crosslinked polymethyl methacrylate as the wall material. Alkylphenol polyoxyethylene ether (OP-10), polysorbate-20 (Tween-20), sodium salt of styrene-maleic anhydride polymer (SMA), sodium dodecyl sulfonate (SDS), and hexadecyltrimethylammonium chloride (1631) were employed as emulsifiers to investigate the effects of the type and amount of emulsifier on MicroPCMs. In addition, the effects of different types of crosslinking agents on the fabrication of MicroPCMs were investigated. Scanning electron microscopy was used to observe the micro-morphology of MicroPCMs. The chemical structure of the MicroPCMs was detected via Fourier transform infrared spectroscopy. The thermal properties and thermal stability of the MicroPCMs were analyzed using a differential scanning calorimeter and a thermal gravimetric analyzer, respectively. Particle size distributions of the MicroPCMs were measured using a particle size analyzer. The results demonstrate that MicroPCMs with regular morphology were prepared when the mass ratio of the SMA to the oil phase was 3%, and the latent heat and yield of the MicroPCMs were 80.29 J g−1 and 84%, respectively. Furthermore, the MicroPCMs were successfully synthesized using pentaerythritol triacrylate containing the hydroxyl group as the crosslinking agent with an average particle size of 14.18 μm and excellent thermal stability.
研究领域:
材料科学
·
化学工程
✓ 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）