SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Wenqing Wang,Hao Li,Xinmin Ma,Jianming Pan
The development of environmentally friendly and efficient methods for the removal of Phenolic endocrine disruptors (PEDs) from aqueous is essential to protect the environment and human health. In this work, sol–gel method and emulsion template approach were combined and applied to construct 1-Butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF 6 ) ionic liquid-filled silica-shell microcapsules (SiO 2 @IL). And amino, halogen and long-chain alkanes surface-functionalized silica-shell encapsulated ionic liquid microcapsules (SiO 2 -NH 2 @IL, SiO 2 -Cl@IL, and SiO 2 -C 16 @IL) were successfully formulated by silica layer modification techniques. The microcapsules have homogeneous dimensions, about 1 µm, and high loading, about 92 wt% of ILs. Four microcapsules showed high adsorption properties and excellent regeneration performance for removing 3,4,5-trichlorophenol (3,4,5-TCP), which benefited from the excellent performance of [BMIM]PF 6 on the extraction of 3,4,5-TCP and the enhanced hydrophobic and electrostatic effects of the surface modified microcapsules. The maximum adsorption capacity of SiO 2 @IL, SiO 2 -NH 2 @IL, SiO 2 -Cl@IL and SiO 2 -C 16 @IL calculated from the Langmuir model was 1047, 1207, 1108 and 1145 mg g −1 at 25 °C, respectively. The main factors affecting the extraction performance were the hydrophobicity and steric hindrance of [BMIM]PF 6 . After three regeneration cycles, the adsorption capacity and desorption efficiency of microcapsules were still above 90 %. The functionalization of the shell layer enhances the hydrophobic and electrostatic effects, which is conducive to the adsorption process, and provides some theoretical and data support for the subsequent construction of ionic liquid encapsulation materials for chlorophenol removal.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2022
·
IF 7.305
Jiahui Lu,Nan Sheng,Chunyu Zhu
Phase change materials (PCMs) using metals/alloys have been concerned for medium temperature solar thermal storage and waste heat recovery. However, the PCMs may leak due to the solid-liquid phase change, which greatly limits the use of metallic PCMs. In this study, we report the synthesis of microencapsulated PCMs (MEPCMs) using metallic Sn as PCM core and a sol-gel coated SiO 2 as shell. The as-coated microcapsules are further undergone a high temperature heat treatment at oxygen/nitrogen atmosphere. Due to the self-repairing effect, the cracked microcapsules can be sealed and stabilized, thereby forming high stabilized MEPCMs over 100 cycles. The melting point and latent heat of the Sn@SiO 2 –O 2 microcapsules were around 233 °C and 56 J g -1 respectively, while the values were around 233 °C and 58 J g -1 for Sn@SiO 2 –N 2 microcapsules, similar to the theoretical values of metallic Sn. The successfully prepared Sn@SiO 2 MEPCMs could find wide applications in medium temperature thermal energy storage .
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
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2020
·Vol. 12
·期 1
·119
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IF 3.426
Wei Zhou,Shu-Jie Hao,Guo-Dong Feng,Pu-You Jia,Xiao-Li Ren,Meng Zhang,Yong-Hong Zhou
Although tung oil is renewable, with an abundant production and low price in China, and it is used to synthesize different polyols for rigid polyurethane foam (RPUF), it remains a challenge to improve the properties of RPUF by redesigning the formula. Therefore, we propose four novel compounds to strengthen the properties of RPUF, such as the catalyst-free synthesis of tung oil-based polyol (PTOK), aluminum phosphate micro-capsule (AM), silica micro-capsule (SiM), and grafted epoxidized monoglyceride of tung oil on the surface of SiO2(SiE), which were designed and introduced into the RPUF. Because of the PTOK with a catalytic function, the foaming process of some RPUF samples was catalyst-free. The results show that the incorporation of AM, SiM, and SiE, respectively, endow RPUF with a better thermal stability at a high temperature, and theT5%,Tmax1, andTmax2of RPUF appeared to be reduced, however, theTmax3and residue rate at 800 °C were improved, which may have a positive effect on the extension of the rescue time in case of fire, and the limiting oxygen index (LOI) value was increased to 22.6%. The formula, containing 25% PTOK made the RPUF environment-friendly. The results were obtained by comparing the pore size and mechanical properties of the RPUF—the AM had a better dispersion in the foam, and the foam obtained a better mechanical, thermal, and flame retardancy.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
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IF 6.3
Yujiao Li,Yixiao Li,Tong Lu,Yongxuan Xiang,Tianyu Cai,Gang Tan,Tieling Xing
As global energy demand rises and climate change intensifies, sustainable and energy-efficient thermal regulation solutions are attracting significant attention. Radiative cooling and solar heating offer passive temperature control without external energy input. However, their unidirectional nature (either cooling or heating) limits adaptability to varying environmental conditions. In this study, a dual-mode Janus composite fabric was developed to enable reversible radiative cooling and solar heating for adaptive thermal management. The asymmetric architecture features a cooling side (porous Poly (vinylidene fluoride-co-hexafluoropropylene (PVDF-HFP)/hexagonal boron nitride (h-BN)/Paraffin (Pn)@silicon dioxide (SiO 2 )) achieving 96.24 % solar reflectance and 94.78 % IR emissivity. The heating side (multi-walled carbon nanotubes (MWCNTs)/sericin) exhibits 94.23 % solar absorptivity. Thanks to its excellent spectral properties, this Janus fabric demonstrated excellent solar heating performance (39 °C) and passive radiative cooling effect (10 °C) under sunlight compared to original cotton fabrics. Furthermore, the encapsulated PCMs (Pn@SiO 2 , Δ H m = 179.4 J/g) provided a thermal buffer platform during heating and cooling periods, effectively mitigating sudden temperature changes. Additionally, the Janus fabrics demonstrated outstanding flexibility, air permeability, and hydrophobic easy-cleaning properties. These findings suggest that this work could provide a sustainable, energy-free solution for adaptive thermal management in dynamic climatic environments.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
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2025
·
IF 7.4
Peng Yang,Xiao-Nan Su,Jun-Feng Su,Qin-Yu Xing,Xin-Yu Wang,Qian Sun,Zhi-Yong Tan
Bitumen oxidative aging leads to pavement deterioration through increased stiffness and cracking, necessitating effective rejuvenation strategies. Current approaches utilizing waste soybean cooking oil (WSCO) are limited by rapid evaporation and leaching. This study presents an innovative solution through silica microencapsulation of waste soybean cooking oil (microWSCOs) synthesized via optimized oil-in-water emulsion with tetraethyl orthosilicate. The microcapsules exhibit uniform spherical morphology (10-50 μm diameter) with high encapsulation efficiency (92±3%) and thermal stability (<5% mass loss at 180°C for 2 h). Controlled release kinetics under simulated traffic loading (0.7 MPa, 10 Hz) demonstrate 62.4±2.1% cumulative rejuvenator release after 10,000 cycles, effectively restoring aged bitumen properties: softening point reduction of 15.2±0.8°C, penetration increase of 28.3±1.5%, and complex modulus decrease of 34.7±2.3%. Environmental resistance testing reveals 89.2±3.5% WSCO retention following 500 h UV irradiation (0.89 W/m²) and 7-day water immersion. The microencapsulation system demonstrates dual sustainability benefits by valorizing waste oil while significantly extending pavement service life through targeted, long-term rejuvenation.
研究领域:
材料科学
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土木工程
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可持续能源
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
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2012
·Vol. 22
·期 45
·24132-24138
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IF 5.968
Hui Yang,Yan Liu,Qianhong Shen,Liangfu Chen,Wenhui You,Xinmin Wang,Jiansong Sheng
A novel method was proposed to fabricate a mesoporous silica microcapsule with Ag nanoparticles (AgNPs) loaded onto the interior wall of a mesoporous silica shell. The mesoporous silica microcapsule-supported AgNPs (denoted as AgNPs@silica microcapsule) was fabricated via a two-step process: (i) Ag+ ions were adsorbed on the surface of monodisperse sulfonated polystyrene (PS) beads via electrostatic interaction, and then reduced and protected by polyvinylpyrrolidone (PVP) to obtain PS–Ag composite spheres. (ii) Silica colloids generated by the hydrolysis and polymerization of tetraethoxysilane (TEOS) were assembled on the PS–Ag composite spheres via hydrogen bond forces to form a silica shell, followed by the removal of the PS core and PVP through calcinations. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray (EDS), X-ray photoelectron spectroscopy (XPS) and X-ray diffractometery (XRD) were adopted to analyze the as-prepared AgNPs@silica microcapsule. Furthermore, the antibacterial properties of this unique structured material were investigated as well. The results show that the AgNPs, with the form of elementary substance, dispersely load onto the interior wall of silica shell, and the shell is composed of a single layer of interconnected silica particles and mesopores. This unique structure can effectively avoid the aggregation problem existing in traditional Ag colloid system and slowly release Ag+ ions, which will diffuse to the external medium through the mesopore channels in the shell, inducing antibacterial activity. The antibacterial activity against Escherichia coli (E. coli) can reach up to 99.8% and, more importantly, can maintain a high level for long periods over two months. The AgNPs@silica microcapsule can combine the advantages of high surface area materials and large-scale materials, achieving both high antibacterial activity and easy recycling characteristics, thus showing its great potential as an antimicrobial agent.
研究领域:
材料科学
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纳米技术
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生物医学工程
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化学
✓ 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）