ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xubao Jiang,Diankai Zhang,Yujun Wang,Ruiqing Wang,Xiang Zheng Kong,Xiaoli Zhu,Shusheng Li,Xiangling Gu
Raspberry-like microspheres have been widely used as superhydrophobic materials, photonic crystals, drug carriers, etc. Nevertheless, their preparation methods, usually consisting of multiple steps, are generally time- and energy-consuming. Herein raspberry-like SiO2@polyurea microspheres (SiO2@PUM) are readily prepared via a one-step precipitation polymerization of isophorone diisocyanate in a H2O/acetone mixture with the presence of SiO2 particles. The sphere size, surface roughness, and SiO2 content of SiO2@PUM are easily adjustable by varying the experimental conditions. TEM and SEM observations reveal that the final SiO2@PUM exhibits a core–shell structure, with polyurea (PU) in the core and SiO2 particles as the shell. In the process, the SiO2 particles were initially located on the PUM surface as a monolayer. With the reaction proceeding, the monolayer of SiO2 particles became thicker, forming a thicker layer of SiO2 particles on PUM due to the accumulation of SiO2 particles, leading to a multilayer structure of SiO2 particles on the shell of SiO2@PUM. The formation mechanism of the raspberry-like SiO2@PUM was thoroughly discussed and ascribed to electrostatic attraction between the positively charged PU and negatively charged SiO2 particles. Once dried, SiO2@PUM was superhydrophobic and turned hydrophilic if water-wetted. Using a layer of SiO2@PUM, effective separation with good reusability for a variety of oil–water mixtures was achieved regardless of the oil density and types of oil–water emulsions. This work presents a novel protocol for the preparation of raspberry-like microspheres with tunable wettability via a rapid and green process, and the resulting microspheres are highly effective for the separation of diverse types of oil–water mixtures.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2013
·Vol. 4
·期 10
·3020-3027
·
IF 5.231
Yangyi Sun,Yuyong Yin,Min Chen,Shuxue Zhou,Limin Wu
This paper presents a one-step procedure for the facile synthesis of monodisperse raspberry-like polymer colloidal particles by soap-free emulsion polymerization of styrene (S), acrylic acid (AA), and 3-(trimethoxysilyl)propyl methacrylate (MPS). In this method, when S, AA, and MPS are mixed with water and stirred at a certain temperature, raspberry-like P(S–MPS–AA) colloidal particles with uniform shapes and sizes could be obtained in a reliable manner. Both the core particles and the smaller corona particles of core surfaces were formed in situ. A mechanism of formation based on the second nucleation induced by MPS-enriched segments on the core surfaces is proposed.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 15
·6651-6660
·
IF 3.591
Chao Wang,Guolong Sang,Yedong Rong,Boran Zhang,Yi Zhao,Jinlong Yang
Nanoscale complex-shaped colloids with tunable morphologies and fascinating properties have attracted the attention of numerous scientists for decades. Exploring facile synthetic strategies has always been the target for the large-scale production and practical use of these remarkable materials. Herein, we developed a one-step strategy to fabricate raspberry-like hollow periodic mesoporous organosilica (RHPMO) with tunable surface structures and specific surface area as high as 1628 m2 g−1. Unexpectedly, this preparation method shares a similar protocol as that of the classical one to make spherical PMO. The dynamic formation process of RHPMO has been detected by TEM. PMOs with solid cores were formed at the first stage, followed by a hollowing process owing to the tension of condensation among the silica precursor molecules. The final RHPMO nanoparticles were generated by controlling the condensation and the adsorption of the as-formed precursor/surfactant assemblies and covalently bonding them subsequently onto the surface of the core. The size of corona particles increased with the concentration of NH3·H2O, while low reaction temperatures were beneficial for the formation of RHPMO instead of spherical HPMO (SHPMO). A superhydrophobic coating was realized by depositing fluorine-modified RHPMO layers onto the glass substrate. The measured contact angle reached 153.9°. This one-step strategy for fabricating RHPMO may bring the new understandings of the formation mechanism of PMO and is expected to serve as a facile way for the large-scale production of raspberry-like functional silica spheres, which will thus open gates for more targeted applications.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 9
·2736-2750
·
IF 3.348
Chongyang Mai,Li Yang,Chengcheng Lv,Junwen Tian,Qintian Gu,Jian Hu,Yan Jiang,Hongwen Zhang
In this article, we introduce a facile method for preparing triple-scale raspberry-like composite particles. First, the copolymerized microspheres of styrene and 3-methacryloyloxypropyltrimethoxysilane were prepared by suspension polymerization, and then double-sized SiO 2 particles were synthesized by one-pot using the secondary nucleation phenomenon of ethyl orthosilicate. Finally, the styrene copolymer microspheres were combined with SiO 2 particles to form raspberry-like microspheres. Adjusting the feed rate of the precursor and the water content can achieve the transition from dual-scale raspberry-like particles to triple-scale raspberry-like particles. The structure and morphology of the composite particles were characterized by infrared analysis, scanning electron microscope, and so forth, and the contact angle to water was measured. The results show that the superhydrophobic surface prepared by triple-scale raspberry-like composite particles has a static contact angle of up to 158 ± 1°, and a high Cassie-Baxter state stability, which can withstand a pressure of up to 565 Pa. It also shows great application potential in self-cleaning, anti-freezing and so on.
研究领域:
材料科学
·
界面化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Wei Chen,Binbin Yu,Zhiyou Wei,Sheng Mao,Tao Li
Hypothesis Although a raspberry-like configuration has been long observed in biological processes (e.g., the intimate association between Cajal bodies and B-snurposomes), studies on this morphology are very limited. Raspberry-like droplets created with multiple immiscible liquids are expected to provides an ideal model for such structures in biological systems, including their possible formation mechanism, phase behaviors, and coalescence dynamics. Experiments & Simulations Using three liquid phases, one surfactant and some colloidal particles, raspberry-like droplets containing one large central droplet and multiple protrusions embedded on its surface were successfully created. Confocal microscopy studies were carried out to track their formation and coalescence dynamics. A 2D phase-field model was applied to test the influence of the protrusions in the system. Findings The formation of this raspberry-like morphology involves a partial inversion process, which was predicted by Friberg et al. with numerical simulations but has never been demonstrated experimentally. A two-step coalescence was revealed, where the protrusions merge first and create a capillary bridge, which drives the droplets to coalesce. Increasing the viscosity of the continuous phase can help to prevent the destabilization. These fundamental features of raspberry-like droplets represent an important step toward producing multi-liquid materials with unique functionality, and can potentially illuminate some biological systems and processes.
研究领域:
生物物理学
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材料科学
·
细胞生物学
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2016
·Vol. 7
·期 27
·4531-4541
·
IF 5.687
Chunbao Du,Nan Zhang,Shichao Ding,Xumian Gao,Ping Guan,Xiaoling Hu
The surface functionalities of nanomaterials provide an invaluable resource to biomaterials science in the form of biomolecular recognition, sensing, self-assembly and drug delivery. This paper presents a one-step procedure for the facile preparation of highly cross-linked raspberry-like nano/microspheres by the dispersion polymerization of polyethylene glycol dimethacrylate and N-vinylimidazole. Ionic liquid-functionalized reactions were then conducted on the surface of the raspberry-like nano/microspheres to investigate the effects of the functional groups on the peptide adsorption in aqueous media. Various characterization methods were employed to characterize the as-prepared nano/microspheres and to track the experiment process. The results reveal that the nano/microspheres were raspberry-like, monodisperse and stable. It was also found that the adsorption of immunostimulating hexapeptide from human (IHH) was correlated with the surface properties of the ionic liquid-functionalized nano/microspheres, which demonstrated their potential use for the immobilization and release of IHH in practical application.
研究领域:
生物材料科学
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药物递送
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纳米技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Xia Zhao,Miaomiao Sun,Yanping Duan,Hong Hao
Superhydrophobic CH 3 -SiO 2 and i-Bu-SiO 2 copolymer coatings containing raspberry-like micro–nanoparticles were fabricated byemulsifier-free polymerization and sol–gel methods. The morphology of the particles could be controlled by simply adjusting the reactant ratio in the initial solution. The fluoride-free CH 3 -SiO 2 copolymer and i-Bu-SiO 2 copolymer composite coatings exhibited superhydrophobicity with water contact angles (WCAs) of 151.22° and 154.85° and sliding angles (SAs) of 5.03° and 4.85°, respectively. The coatings were applied on cotton to form superhydrophobic cottons resistant to water, milk, and coffee stains. The whole procedure was carried out under a mild environment, without toxic chemicals, costly instruments, or complex production processes. These advantages could provide a large-area preparation and marketability of the coatings.
研究领域:
材料科学
·
纺织工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Lina Zhang,Hui Zhang,Mei Liu,Bin Dong
In this paper, we report a polymer-based raspberry-like micromotor. Interestingly, the resulting micromotor exhibits multistimuli-responsive motion behavior. Its on–off–on motion can be regulated by the application of stimuli such as H2O2, near-infrared light, NH3, or their combinations. Because of the versatility in motion control, the current micromotor has great potential in the application field of logic gate and logic circuit. With use of different stimuli as the inputs and the micromotor motion as the output, reprogrammable OR and INHIBIT logic gates or logic circuit consisting of OR, NOT, and AND logic gates can be achieved.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2014
·Vol. 72
·期 1
·122-129
·
IF 1.547
Liu Yanghua,Zhou Yifeng,Nie Wangyan,Song Linyong,Chen Pengpeng
In this work, silica particles were firstly modified with poly(methyl methacrylate) and then converted to poly(methacrylic acid) (PMAA). The PMAA brushes with different molecular weight were used to modify the seed particles and learn the formation process of the raspberry-like particles. Silica particles with core–shell structure were obtained when the silica seed particles were modified only with carboxyl functional groups. With the increase of the molecular weight of PMAA brushes, uniform raspberry-like silica particles appeared gradually. But when the molecular weight of PMAA brushes was above 136,100, the morphologies became complicated. The electric charge of the polymer brushes was also found to have influence on the final morphologies of the particles. The contact angle (CA) tests showed that films composed of nanoparticles with uniform raspberry-like structures had an average CA of 157.2°, which indicated great prospects in the super-hydrophobic applications.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
高分子化学
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Zhihua Li,Yuan Zhao,Shi Li,Yuanyuan Tu,Zhenzhu Huang,Shudong Lin,Liangzhi Hong,Jiwen Hu
Due to their unique properties, raspberry-like colloidal particles (RCPs) have been widely used in various fields. However, a facile, scalable and robust approach of producing raspberry-like colloidal particles remains an ongoing challenge. Herein, raspberry-like mesoporous poly(styrene- co -divinylbenzene) (PSD) polymeric particles were fabricated by one-step dispersion polymerization in the solvent mixture of ethanol and toluene. The morphologies of obtained polymeric particles could be easily tuned from spherical to raspberry-like structure by changing the composition of the solvent mixtures. A rational mechanism for the formation of raspberry-like polymeric particles was also proposed according to the morphological evolution under different copolymerization conditions. With the assitance of the immonilized PVP layer, the raspberry-like PSD colloidal particles can be further functionalized by depositing Ag nanoparticles on the particle surface. The antibacterial activity of raspberry-like PSD/Ag composite particles against E. coli was up to 99.99%. In addition, raspberry-like PSD/Ag composites can be further utilized to construct antibacterial superhydrophobic surface and liquid marbles.
研究领域:
材料科学
·
生物学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 7
·3910-3918
·
IF 2.936
Xiaotian Zhang,Yangyi Sun,Yijing Mao,Kunlin Chen,Zhihai Cao,Dongming Qi
This paper presents a simple and controllable method for the synthesis of monodisperse nanometer-sized organic–inorganic raspberry-like polystyrene (PS)–SiO2 nanocomposite particles (NCPs) via Pickering emulsion polymerization, by simply using a silane coupling agent, 3-(trimethoxysilyl)propyl methacrylate (MPS), as an auxiliary monomer and controlling its hydrolysis/condensation processes and amount. In this method, when MPS was stirred in acidic water with styrene (St) for a period of time, and then a basic silica solution added, raspberry-like PS–SiO2 NCPs were directly obtained after the polymerization. The whole process needs neither surface treatment for the silica particles nor additional surfactants or stabilizers. We propose that a silica-stabilized Pickering emulsion is formed through Si–OH reaction between the hydrolysis/condensation products of MPS distributed on the St droplets surface and the silica particles.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2024
·
IF 4
Meng You,Xijun Zhao,Rongyu Lu,Jianxiang Ma,Xinghua Zhang,Chen Yuejing,Xiaoming Yang
We report a green and scalable one-pot synthesis of raspberry-like hollow carbon spheres (HCSs) as high-performance cathode materials for zinc-ion hybrid supercapacitors (ZIHSCs). Utilizing poly(methyl methacrylate)@polypyrrole (PMMA@PPy) core-shell nanoparticles as precursors and sodium carbonate (Na₂CO₃) as both a barrier and activator, the resulting HCSs exhibit a hierarchical pore structure, a high surface area of 1883 m²/g, and significant oxygen (6.9 atom%) and nitrogen (1.7 atom%) doping. These features enable exceptional electrochemical performance, with a specific capacitance of 257 F/g at 1 A/g in a 6 M KOH electrolyte and remarkable energy density of 125 Wh/kg at a power density of 160 W/kg in ZIHSCs with a 2 M Zn(CF₃SO₃)₂ electrolyte. Moreover, the HCSs exhibit outstanding cycling stability, retaining 92.6 % of their initial capacitance after 5000 cycles at 5 A/g. This study highlights the potential of environmentally friendly porous carbon materials as promising candidates for advanced electrochemical energy storage applications.
研究领域:
材料科学
·
电化学能源存储
✓ 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）