Nanoscale
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2020
·Vol. 12
·期 31
·16443-16450
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IF 6.895
Yan Bao,Yuanxia Zhang,Jianzhong Ma
Durable superhydrophobic coating is attractive due to its long-term superhydrophobicity, anti-fouling and self-cleaning properties. However, the fabrication of durable superhydrophobic coatings on a fragile surface, including leather and paper, is still a challenge due to its bad resistance to harsh environments such as high temperature, high pressure and strong acid or strong base. Herein, we developed a universal way to fabricate long-lasting superhydrophobic coating on leather via amphiphilic Janus particles, which have one of the semispheres functionalized with hydrophobic 1-dodecanethiol and the other semisphere functionalized with hydrophilic β-mercaptoethylamine. Polyurethane with isocyanate end groups was sprayed on the leather surface as an intermediate layer to strongly link Janus particles with leather via cross-linking. Moreover, amphiphilic Janus particles were fabricated from hollow SiO2 particles via a thiol–ene click reaction due to its low density. The superhydrophobic coating on leather possessed a high water contact angle of 162.2°. Furthermore, it still retained excellent hydrophobicity with a water contact angle of 154° after 140 cycles of abrasion using sandpaper. This study not only provides a novel method for the fabrication of amphiphilic hollow SiO2 Janus nanoparticles, but also resolves the difficulties in constructing long-lived superhydrophobic coatings on fragile surfaces by existing methods. Meanwhile, the present study also suggests a potential way to translocate functional Janus microcapsules, which may give some significant suggestions on the future nanoparticle design for drug delivery and energy storage.
研究领域:
材料科学
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表面工程
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DOI
PubMed
高影响因子
MATERIALS LETTERS
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2025
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IF 2.7
Yuan Zhuang,Yanhui Liu,Shirong Wang,Xianggao Li,Shuxian Meng
Electrophoretic particles enable image display in electrophoretic displays by migrating under an electric field. In this study, white hollow TiO 2 was synthesized via an improved template method, and colored hollow particles were obtained through pigment adsorption. The TiO 2 exhibited a charge of +78.08 mV and 92 % reflectivity, making it suitable for electronic paper applications. Magenta, yellow, and cyan hollow particles, all negatively charged with non-overlapping charge values, were formulated into dual-color electrophoretic suspensions. Under alternating voltage, color changes were achieved in magenta/yellow and yellow/cyan systems. This study offers new insights for dual-color and multi-color electrophoretic displays.
研究领域:
材料科学
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显示技术
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2019
·Vol. 91
·期 3
·431-440
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IF 1.986
Zhang Cui,Shi Yan,Fu Zhifeng
We present an effective and environmental-friendly pathway to prepare SiO 2 hollow particles using Na 2 SO 4 particles as templates, which involved sol-gel silica coating on surface of the templates and subsequent removal of the Na 2 SO 4 templates by water-dissolution. Further, SiO 2 /TiO 2 double-shell hollow particles were prepared by coating TiO 2 on the surface of the hollow SiO 2 particles. The morphologies and structures of the synthesized hollow particles were characterized using SEM, TEM, XRD, FTIR, BET, and UV. The sizes and shapes of the hollow particles can be controlled by using Na 2 SO 4 templates with different sizes and shapes. The sizes of hollow particles were in the range from 500 nm to 15 μm. By changing the concentration of silicon precursor, the shell thickness of hollow SiO 2 particles can be controlled in the range of 25–200 nm. In addition, SiO 2 /TiO 2 double-shell hollow particles showed better photocatalytic degradation of Rhodamine B than that of hollow TiO 2 particles and solid TiO 2 particles.
In this study, we have successfully fabricated hollow SiO 2 particles with different shapes and size, as well as hollow SiO 2 /TiO 2 double-shell particles via a facile and environmentally friendly method employing water-soluble inorganic Na 2 SO 4 particles as template. The preparation process involved sol-gel silica and titania coating on surface of the template and followed by water-dissolution removal of the Na 2 SO 4 template.
研究领域:
材料科学
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纳米技术
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Saleem Raza,Xueyong Yong,Muslim Raza,Jianping Deng
This article reports a novel type of biobased magnetic hollow particles (BMHPs) derived from a widely available biophenylpropene trans -anethole (ANE). To prepare BMHPs, ANE and maleic anhydride (MAH) underwent copolymerization in the presence of particulate templates to form core/shell particles. Sequential removing the cores and hydrolyzing processes provide biobased hydrolyzed hollow particles (BHHPs), which were then grafted with amino-modified Fe 3 O 4 NPs. The prepared BMHPs were characterized by SEM, TEM, XRD, VSM, EDS and FT-IR techniques and further used as bioadsorbent to remove pollutants from wastewater. The maximum adsorption capacity towards Cr 3+ , Pb 2+ and Rhodamine B is up to 44.5, 48.8 and 50.4 mg/g, respectively. Kinetic and isothermal studies show that the adsorption is best fitted with pseudo-second order model and Langmuir isothermal adsorption. BMHPs demonstrated remarkable magneticity and can be easily separated by external magnet. Recycling use study showed that the dye-adsorbed BMHPs can be easily restored in HCl/THF mixed solution. The advantages of the new adsorbents, namely, derivative from bio-resource, high adsorption capacity, much ease in separation and regeneration recyclability, render them with promising potentials in wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Xue Wang,Linlin Chen,Guanqing Sun,Ren Liu
Hypothesis Hollow particles have been used in a variety of applications and many methods have been developed. Hollow particles templated from Pickering emulsions due to nanoparticle adsorption at the oil-water interface usually suffer from the collapsed morphologies and low thermal and solvent stability and enhancement of the shell can significantly improve the hollow particle performance. Experiments This paper reports hollow particles templated from Pickering emulsion droplets in combination with UV photopolymerization . The Pickering emulsions were stabilized by functional silica nanoparticles at the O/W interface and the oil phase contains photosensitive reactants, initiator, catalyst and volatile solvents. The effects of nanoparticles concentration, O/W volume ratio, pH, dispersion speed and time on the stabilization of Pickering emulsion were firstly carried out and the properties of hollow particles formed by traditional interfacial crosslinking and UV photopolymerization were systematically investigated. Findings Compared with previous interfacial crosslinking method, the UV photopolymerization method gives much more robust shells and we show in the paper that the hollow particles have much higher solvent resistance and thermal stability. The enhancement of thermal stability and solvent resistance of the hollow particle could extend its applications to more harsh fields such as self-healing coatings used in deep sea conditions.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2019
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IF 4.182
Saleem Raza,Xueyong Yong,Jianping Deng
In the present work, a novel strategy is developed to immobilize cellulase enzyme. Firstly, biobased hollow polymer particles were prepared from commonly available bio-phenylpropene, trans -anethole (ANE) through a preparation process established earlier by us, then onto which amino-modified Fe 3 O 4 NPs were covalently attached to form biobased magnetic hollow particles (BMHPs). Further, the surface of BMHPs was modified with glutaraldehyde via Schiff base reaction to produce multi-layered magnetic hollow particles (MMHPs). Cellulase ( Aspergillus niger ) was covalently immobilized on MMHPs also through Schiff base reaction, providing multi-layered magnetic hollow particles containing cellulase (c-MMHPs). An optimum loading amount of cellulase was achieved as 180 mg/g. The c-MMHPs were characterized by SEM, TEM, EDX, VSM, FT-IR, BET and XRD analysis techniques. The immobilized cellulase (c-MMHPs) was used as bio-catalyst towards carboxymethyl cellulose (CMC) and showed impressive catalytic activity and significantly enhanced stability at different pH and temperature conditions. Besides, the adsorption ability and the adsorption kinetic study of c-MMHPs towards BSA and methylene blue dye were also investigated. The maximum adsorption towards BSA and MB was found to be up to 716 and 264 mg/g, respectively. The present work opens up a new strategy to immobilize enzymes, and the created MMHPs constitute a promising platform for immobilizing enzymes and other biomacromolecules.
研究领域:
生物化学
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材料科学
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酶工程
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DOI
高影响因子
Polymer Chemistry
·
2016
·Vol. 7
·期 11
·2092-2098
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IF 5.687
Zhixing Lin,Hao Tian,Fugui Xu,Xiangwen Yang,Yiyong Mai,Xinliang Feng
This paper reports a simple self-assembly strategy towards bowl-shaped carbon-containing hollow particles, as well as an unprecedented potential application for block copolymer vesicles in energy storage. Kippah vesicles (fully collapsed vesicles), formed by solution self-assembly of an amphiphilic polystyrene-block-poly(ethylene oxide) block copolymer, were employed as the template to guide the formation of bowl-shaped nitrogen-doped carbon hollow particles (BNCHPs). As electrode materials of supercapacitors, BNCHPs exhibit superior electrochemical performance. In particular, compared with their spherical counterpart, BNCHPs largely increase their volumetric packing density, leading to much higher volumetric capacitance or volume reduction of electrodes, which is desired for practical supercapacitor devices.
研究领域:
材料科学
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纳米技术
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电化学
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高分子科学
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储能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）