COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Shuo Liu,Fangxu Li
In order to overcome the limitations of fatty amines (FAS) and reduce consumption and costs, this study developed a high-efficiency flotation system that FAS with methyl isobutyl methanol (MIBC). Single mineral flotation results showed that MIBC enhanced the collecting ability of decamine (DCA), dodecylamine (DDA), tetradecylamine (TDA), and hexadecylamine (HCA) while reducing their dosage. At pH 3, recoveries for DCA, DDA, TDA, and HCA were 63.22 ± 1.34 %, 86.284 ± 4.33 %, 72.30 ± 3.34 %, and 40.02 ± 2.27 %, respectively. With MIBC added, these increased to 89.43 ± 1.87 %, 89.58 ± 2.66 %, 73.38 ± 4.27 %, and 79.60 ± 2.23 %. Batch flotation experiments also demonstrated that lepidolite recovery by DDA and HCA rose from 96.64 % and 36.47–96.70 % and 98.29 %, respectively. Surface tension and viscosity detection revealed that the addition of MIBC to FAS resulted in a decrease in surface tension and an increase in solution viscosity. The adsorption, zeta potential, contact angle and foaming property tests indicated that MIBC can enhanced the recovery of lepidolite by adjusting the adsorption densities of DCA and DDA, as well as modifying the bubble properties of TDA and HDA in the flotation pulp. These findings highlighted the critical role of bubble properties in lepidolite flotation systems, going beyond mere hydrophobicity effects.
研究领域:
矿物加工工程
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表面化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Zhipeng Li,Huaijie Yan,Fuqiang Zhang
The hydrophobic modification of montmorillonite significantly extends its potential applications across various industrial sectors. In this study, montmorillonite with controlled hydrophobicity was prepared based on Cu 2+ -exchanged montmorillonite by synergistic modification with perfluorodecyltrimethoxysilane and aliphatic amines. Our findings indicate that copper ion-exchange process not only increases the interlayer spacing of montmorillonite but also promotes the formation of antlerite crystals on its surface. The presence of interlayer water impedes the silanization process with perfluorodecyltrimethoxysilane, confining the grafting to the external surface of the clay. Consequently, this method can only increase the water contact angle (WCA) from 0° to 54.4°. Conversely, treatment with aliphatic amines removes interlayer water and establishes a hydrophobic structure on the internal surface, raising the WCA to 47.0°. Remarkably, the synergistic modification of perfluorodecyltrimethoxysilane and aliphatic amine resulted in a WCA of 157.3°. Further investigations demonstrated that adjusting the type and concentration of the aliphatic amines allows for precise control of WCA, enabling adjustments within the range of 54.4° to 157.3°. This study offers a viable approach for the controllable hydrophobic modification of montmorillonite.
研究领域:
材料科学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
·
2014
·Vol. 12
·期 33
·6399-6405
·
IF 3.487
Xinhua Cao,Tingting Zhang,Aiping Gao,Keli Li,Qiuli Cheng,Lijuan Song,Min Zhang
A new gelator 1 based on a simple naphthalimide derivative was synthesized and fully characterized. It was found that the organogel 1 was formed only in a mixed solvent of methanol and H2O (1/1, v/v). The organogel was thoroughly characterized by using various microscopic techniques including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and UV-vis, fluorescence and Fourier transform infrared (FTIR) spectroscopy. Hydrogen bonds were the main driving force for the organogel formation. Interestingly, the organogel 1 exhibited the ability to distinguish aliphatic amines from aromatic amines. The gel state and fluorescence emission intensity were both changed after two minutes after the addition of aliphatic amines. This organogel system could be applied in the detection of aliphatic amine pollutants.
研究领域:
材料化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Canpu Yang,Jiusheng Hu,Wenjiang Tan,Jinhai Si,Xun Hou
Carbon dots (CDs) are an encouraging green luminescent material; however, the aggregation-caused quenching (ACQ) effect poses a significant limitation for their use in solid-state devices. By adjusting precursor fatty amine chains, this paper synthesized four solid-state emissive CDs with aggregation-induced emission (AIE) properties (Lx-CDs). When water is introduced, the generation of Lx-CDs aggregates creates the switching off of the carbon-core emission (blue) in acetic acid solution and the switching on of the surface-state emission (orange). Results demonstrate that the disulfide bond and fatty amine chain structures allow considerable inhibition in the distance of aromatic skeletons, causing the aggregation-state emission, and the multiple interactions in aggregates can reduce the non-radiative processes benefiting the AIE. Besides, the fast and slow fluorescence species can be confirmed to correspond to the emission paths of carbon-core and surface-state, respectively. The solid-state emission wavelength, photoluminescence quantum yield (PLQY), and AIE strength can be engineered by the fatty amine chain regulated charge transfer and π-π stacking. This study not only reveals the intrinsic mechanism of carbon-core and surface-state luminescence dynamics in AIE CDs but also provides a method for controlling fluorescence wavelength and enhancing the emission of aggregated particles using precursor fatty amine chain length.
研究领域:
材料科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2021
·Vol. 6
·期 4
·2100924
·
IF 8.582
Xingyun Ye,Zhuoyue Tian,Xiaoyin Cao,Yukang Fan,Peilei Zhou,Chengjun Wang,Jiyan Li,Hanxue Sun,Zhaoqi Zhu,Weidong Liang,An Li
The development of phase change materials (PCMs) composites with high light-to-thermal energy conversion efficiency is of great importance for solar energy storage. Herein, the preparation of novel PCMs composites by incorporation of fatty amines (FAs) into the carbon membranes (CMs) with aligned nanochannels network is first reported, which is obtained by employing an anodic alumina oxidation membrane as sacrificing template and using polypyrrole and asphalt as carbon precursor via a simple carbonization treatment. The carbonized membranes possess abundant porosity and aligned nanochannels, which is beneficial to harvest solar light combined with their carbon in nature. In addition, organic PCMs, i.e. 1-Hexadecanamine (HDA, ΔH = 311.1 kJ/kg) and 1-Aminoheptadecane (AHD, ΔH = 293.0 kJ/kg) can be spontaneously loaded into the nanochannels of CMs by the capillary action and surface tension. The fabricated FAs/CMs composites present an enhanced thermal conductivity ranging from 0.291 to 0.525 W m −1 K −1 . Compared to pure FAs, the thermal conductivities of the PCMs composites are 144.8–357.1% higher than that of the control. Meanwhile, the as-synthesized FAs/CMs composites also exhibit a remarkable high photothermal energy storage efficiency of up to 93.8%, which is one of the highest values reported to date, making them promising candidates for a broad range of applications in solar energy harvesting, conversion, and storage.
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
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
You-yun Gong,Zi-ang Jia,Yiwen Fan,Jin-ping Cheng
Rational chemical modification engineering of metal-organic frameworks (MOFs) is an effective means to improve their CO 2 capture efficiency. In this study, we prepare UiO-66 MOF impregnated with different types of aliphatic amines using solvothermal and impregnation techniques, respectively, and investigated their performances in CO 2 adsorption and CO 2 /N 2 separation using the isothermal adsorption method. Aliphatic amines successfully chemically modifies UiO-66, and their molecules effectively occupied the pores of the UiO-66 framework, which has been confirmed by material characterization, experiments, and DFT-FMO calculations. There are significant improvements in the ability to capture CO 2 when aliphatic amines were added to UiO-66 compared to pure UiO-66 (1.39 mmol/g up to 2.11 mmol/g-2.53 mmol/g), attributed to the different types and numbers of amines, and there were also differences in the Zr metal clusters and BDC ligands. Meanwhile, The material has better CO 2 /N 2 adsorption IAST selectivity(98) because its surface area is changed and N 2 does not interact specifically with the adsorbent. Furthermore, the CO 2 adsorption capacity remains constant across multiple adsorption cycles, highlighting the adsorbent's stability and reliability during repetitive CO 2 capture. This study provides new ideas and perspectives for improving the CO 2 capture efficiency of UiO-66.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xiaoyin Cao,Lijuan Yang,Lijuan Yan,Zhaoqi Zhu,Hanxue Sun,Weidong Liang,Jiyan Li,An Li
Phase change materials (PCMs) with ideal light-to-thermal conversion efficiency play an important role in solar energy storage and conversion . Hence, we report the fabrication of a novel composite PCMs (CPCMs) device based on ZnO nanorods deposited indium tin oxide (ITO) glass loading with fatty amines. ZnO nanorods were deposited on the ITO glass using a three-electrode electrodeposition method, and 1-Hexadecylamine (HDA) was loaded on the ITO glass via spin-coating, followed by spraying polypyrrole (ppy) on the surface of CPCM device to improve thermal conductivity and solar absorption. The as-prepared CPCM device exhibits excellent light-to-thermal conversion efficiency, achieving a high conversion efficiency of 90.2% obtained at 1sun owing to its high light absorption (80%), enhanced thermal conductivity (improved by 57.8%), and the unique vertical aligned nanorods structure which could significantly decrease tortuosity, thereby reducing thermal route and lowering thermal response time. Furthermore, the electro-to-thermal conversion efficiency of the CPCMs device has also been investigated and the results show that it can reach up to 69.8% under a low voltage of 5 V, indicating that the CPCM device has a high potential in the field of electro-to-thermal conversion. Based on the benefits listed above, the CPCM device may serve an ideal platform for a wide range of solar energy storage and conversion applications.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Zhen-Hao Tian,Jian-Hong Xu,Yu-Jun Wang,Guang-Sheng Luo
We developed a novel microfluidic method to synthesize full-color emitting CdSe semiconductor nanocrystals with good monodispersity and less amount of Cd by using mixed amines of oleylamine (OLA) and dodecyl amine (DDA) as ligands. By the control of mixed DDA and OLA, the stage of nucleation and growth were separated, leading to narrow size distribution of CdSe semiconductor nanocrystals. The full width at half-maximum (FWHM) of fluorescence spectrum of CdSe nanocrystals could be reduced to 27.6 nm as optimizing the ratio of DDA to OLA and reaction temperature. Besides, through mixed amines as ligands, CdSe semiconductor nanocrystals which emitting fluorescence ranged from 530 nm to 615 nm could be synthesized by using less amount of Cd. So an environmental friendly method to synthesize full-color emitting CdSe semiconductor nanocrystals would be possible.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2010
·
IF 4.224
Lai-Jun Zhang,Xing-Can Shen,Hong Liang,Jia-Ting Yao
Four families of magic-sized ZnSe quantum dots (ZnSe MSQDs) with the first exciton absorption peaks at 280 nm (F280), 291 nm (F291), about 319 nm (F319), and 347 nm (F347) were synthesized using fatty amine−H2Se complex as selenium precursor via noninjection one-pot or hot-injection approaches. The formation, growth, and transformation of these families of ZnSe MSQDs were monitored mainly by ultraviolet−visible absorption spectroscopy. Relatively pure F291 and F347 were obtained via the combination of hot-injection technology with purification treatment and were further characterized using mass spectroscopy, infrared spectroscopy, fluorescence spectroscopy, transmission electron microscopy, and X-ray powder diffraction. F291 and F347 are speculated to be [(Zn7Se7)(OLA)2(OA)] (OLA = oleylamine, OA = octylamine) and [(Zn16Se15)(OLA)7], respectively, by analyzing the corresponding mass and the infrared and absorption spectra; both emit narrow exciton fluorescence with relatively small stokes shift of 9 and 2 nm, respectively. Ultrafine ZnSe nanorods with a diameter of about 1.7 nm formed via oriented attachment of F347 were observed using transmission electron microscopy. Fatty amine−H2Se complex has been demonstrated to be a simple, phosphine-free, low-cost, and effective selenium precursor for the synthesis of ZnSe MSQDs or regular quantum dots (RQDs).
研究领域:
材料科学
·
纳米技术
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Yu Lang,Jingjie Zhou,Jinyuan Sun,Huibin Liang,Ke Zhang,Chunyu Wang,Yuqi Liu,Tao Geng
Surfactant reduces the surface tension of liquids, resulting in improved emulsion stability, and there is great interest in pesticide additives. Ethoxylate is often used as a pesticide emulsifier. However, the degree of ethoxylation and the existence of dioxane byproducts can significantly affect the performance of emulsifiers. Here, a series of polyoxyethylene tallow amines with the addition of different numbers of ethylene oxide (EO) were synthesized and characterized. Their physical and chemical performances were measured. The ability of POEA as a surfactant to reduce water surface tension and the surface adsorption of molecules were assessed based on the static and dynamic surface tensions. The results show that the surfactant molecules preferentially form a saturated adsorption layer in solution, and the mixed-diffusion-kinetics mechanism dominates the adsorption process. With the increase of the EO addition number, the emulsifying property of POEA increases, while the wetting property gradually decreases and the contact angle increases. These results can provide a basis for the selection of pesticide additives. At the same time, the mechanism of removing dioxane by ethoxylate is described, and a simple and low-consumption method is put forward to reduce the dioxane content. It provides a new idea for the removal of dioxane.
研究领域:
农药科学
·
表面化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
IF 7.267
Xiaoyin Cao,Shujuan Wu,Lijuan Yang,Jie Cui,Chengjun Wang,An Li
The construction of high-performance materials with superior light-to-thermal conversion efficiency is of great importance for harvesting and utilization of solar energy. Hence, we report the creation of novel composite phase change materials (CPCMs) CPCMs by incorporating three kinds of organic phase change materials (PCMs), i.e. 1-Tetradecylamine (TDA), 1-hexadecanamine (HDA) and Octadecylamine (ODA), into hollow carbon nanospheres (HCNS) via a simple impregnation treatment for efficient light-to-thermal transition. Owing to their carbon in nature, the HCNS show better light absorption of higher than 90%. After incorporation of organic PCMs, their light absorption could still attain 62–70%, which can compete with the existing CPCMs. Beneficial from their abundant porosity and high specific surface areas, organic PCMs can be spontaneously diffused and immersed into the porous architecture of HCNS. In this way, the as-resulted CPCMs containing with TDA, HDA and ODA show high phase change enthalpy of 61.23J/g, 119.5J/g and 101.8J/g, respectively. The CPCMs also exhibit better thermal conductivity and excellent thermal stability, e.g., the enthalpy of HAD based CPCMs remains nearly unchanged even after 100 times of melting/freezing cycles. Under 1 sun irradiation, the light-to-thermal conversion efficiency of CPCMs containing with TDA, HDA and ODA were measured to be 73.04%, 74.46% and 71.74%, respectively, Thus showing great potential as a kind of promising photothermal conversion devices for solar or thermal energy storage applications.
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
TALANTA
·
2016
·
IF 4.035
Jie Huang,Changrong Ou,Fangying Lv,Yuting Cao,Haiqing Tang,You Zhou,Ning Gan
Some harmful aliphatic diamines, e.g., putrescine (Put) and cadaverine (Cad), play important roles in food safety evaluation. In this study, we proposed on-fiber derivatization solid-phase microextraction analysis of non-volatile aliphatic diamines in fish using zeolitic imidazolate framework 8 (ZIF-8) as a solid-phase microextraction (SPME) coating. It was employed to encapsulate isobutyl chloroformate (IBCF, 40 °C, 15 min) for aqueous extraction of Put and Cad. After that, the derivatized aliphatic amines were thermally desorbed in the GC injection port and analyzed by GC-MS. The porous and hydrophobic ZIF-8 with high surface area can increase the IBCF loading amount and prevent it from decomposing, thus increasing the amine extraction effectiveness and sensitivity. In SIM mode and using the molecular ion for quantification, the limits of detection for Put and Cad were 27.1 and 33.2 μg L −1 , respectively under the optimal conditions. The fiber-to-fiber reproducibility values (RSDs) for three ZIF-8 coated fibers were less than 11.4% for both Put and Cad. The extraction with the new fiber was reproducible for at least 30 cycles without a noticeable decrease of performance (RSD<10%). The new fiber was successfully applied to the detection of putrescine and cadaverine in several fish samples and showed good recoveries (78.6–104%).
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）