Food & Function
·
2020
·Vol. 11
·期 9
·7651-7660
·
IF 4.171
Shenglan Guo,Mingyue Song,Xiangyang Gao,Lulu Dong,Tao Hou,Xiaokun Lin,Weijie Tan,Yong Cao,Michael Rogers,Yaqi Lan
Ceramide (CER) is a novel food-grade organogelator with beneficial health effects. Lecithin (LEC) is not an effective gelator; however, it may alter the crystal morphology of the host gelator in a multicomponent system. In this paper, LEC and CER were mixed at various molar ratios in sunflower oil leading to different gelation behaviors. It was interesting since in this multicomponent system, gels formed when there was more less-effective gelator (LEC), while gels hardly formed when there was more effective gelator (CER). This drew our attention since there might not be only one kind of assembly mode between the LEC and the CER. A comprehensive rheological investigation was conducted. It was found that at specific ratios (6L4C and 5L5C), strong gels (G′ > 1.0 × 105 Pa) formed with superior oil binding capacity (up to 99.84%). Meanwhile, these gels exhibited higher tolerance level to permanent deformation than the monocomponent gel. However, weak gels were observed off the optimal ratio (8L2C, 7L3C, 4L6C and 3L7C). The crystal morphology of gels drastically changed with change in gelator proportion. Short needle-like crystals and small rosette crystals were observed in 6L4C and 5L5C, respectively, while other samples exhibited spherulite-shaped crystals (8L2C, 7L3C, 4L6C, and 3L7C), which differed from any of the monocomponent gel structures (10L0C and 0L10C). Results from differential scanning calorimetry and polarized light microscopy suggested that the macroscopic properties are determined by the morphology and distribution of crystals rather than the crystallinity of the matrix. Fourier transform infrared spectroscopy results indicated the presence of van der Waals forces and the formation of hydrogen bonding between the phosphate of the LEC and the amide group of the CER. The above results indicated that the LEC and CER co-assembled at approximately equal molar ratio, and the redundant LEC or CER at other ratios self-sorted to combine with the co-assembled fibers by lateral association, leading to potentially different underlying microstructures. These multicomponent supramolecular oleogels with high tunability may further broaden their applicability in various healthy lipid-based product formats.
研究领域:
食品科学
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分子生物学
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DOI
PubMed
高影响因子
Materials
·
2019
·Vol. 13
·期 1
·111
·
IF 2.972
Xia Zhao,Shuai Yuan,Zuquan Jin,Binbin Zhang,Nazhen Liu,Shibo Chen,Shuan Liu,Xiaolin Sun,Jizhou Duan
Given their outstanding versatile properties, multilayered anticorrosion coatings have drawn great interest from researchers in the academic and engineering fields. However, the application of multilayered coatings is restricted by some limitations such as low interlayer compatibilities, the harsh preparation process, etc. This work introduced a composite film fabricated on a 2A12 aluminum alloy surface, including an anodic oxide film, a sol–gel film, and a layer-by-layer (LBL) self-assembling film from bottom to top. The microstructure and elemental characterization indicated that the finish of the coating with the LBL film resulted in a closely connected multilayered coating with a smoother surface. The anticorrosion performance was systematically evaluated in the simulated corrosive medium and neutral salt spray environment. The integrated coating with the LBL film presented an excellent anticorrosion ability with system impedance over 108Ω·cm2and a self-corrosion current density two orders of magnitude lower than that of the other coatings. After the acceleration test in a salt spray environment, the multilayered coatings could still show a good protective performance with almost no cracks and no penetration of chloride ions. It is believed that the as-constructed multilayered coating with high corrosive properties and a fine surface state will have promising applications in the field of anticorrosion engineering.Keywords:multilayer;corrosion;impedance;layer-by-layer
研究领域:
材料科学
·
腐蚀与防护
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DOI
PubMed
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 9
·1321
·
IF 4.034
Jinrong Lu,Zihan Li,Weijia An,Li Liu,Wenquan Cui
Metal-free porphyrin with good planarity is beneficial to π–π stack interactions, which promotes electron coupling and the separation and transfer of photogenerated carriers. It is necessary to develop metal-free porphyrin-based photocatalysts and exploit the photocatalytic mechanism. Herein, metal–free porphyrin (5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin, TCPP) was self-assembled through an acid-based neutralization reaction and mixing dual-solvents under surfactants to form different aggregates. Morphology structures, optical and optoelectronic properties of the TCPP aggregates were characterized in detail. TCPP self-assemblies showed higher photocatalytic activities for the degradation of phenol under visible light than untreated TCPP powders, and the aggregates of nanorods formed through the acid-based neutralization reaction in the presence of hexadecyl trimethyl ammonium bromide (CTAB) possessed 2.6 times more activity than the nanofiber aggregates formed through mixing dual-solvents. It was proved that self-assembly methods are crucial for controlling the aggregation of porphyrins to form different aggregations, which have a profound impact on the photocatalytic activity.Keywords:metal-free porphyrin;self-assembly;aggregation mode;photocatalysis
研究领域:
化学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
·
IF 3.07
Yuxi Liu,Jing Yang,Ziqi Zhao,Junjie Li,Rui Zhang,Fanglian Yao
With natural polysaccharides carrageenan (Car) and chitosan (Cs) as the polyanion and polycation, respectively, multilayer hollow nanocapsules have been fabricated via sequential layer-by-layer (LbL) electrostatic self-assembly from the sacrificed templates nanospheres (SiO 2 –NH 2 ). The LbL assembly process with the polysaccharides on SiO 2 –NH 2 core was followed by ζ -potential and size analysis. The fabrication of (Car/Cs) x nanocapsules and the removing of the SiO 2 –NH 2 core templates were confirmed by TGA and EDS analysis. The morphology of SiO 2 (Car/Cs) x nanospheres and (Car/Cs) x nanocapsules were observed by TEM analysis. The size analysis of (Car/Cs) x nanocapsules indicated that the cyst wall thickness and cavity volume of the nanocapsules are pH and ionic strength dual responsive. Due to the biocompatibility of the natural polysaccharides carrageenan and chitosan and the responsiveness of nanocapsules to pH and ionic strength, the (Car/Cs) x multilayer nanocapsules are expected to be used as nanoreactors or nanocontainers to control the synthesis, encapsulation, and releasing behaviors of bioactive molecules.
研究领域:
材料科学
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生物医学工程
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DOI
PubMed
高影响因子
ChemPlusChem
·
2013
·Vol. 78
·期 6
·481-485
·
IF 0
Shichao Du,Zhiyu Ren,Yang Qu,Jian-qiang Wang,Lingjun Kong,Keying Shi,Buhe Bateer,Honggang Fu
Graphical Making a stand : By means of in situ reduction and self-assembly at an unconventional liquid–liquid interface, free-standing ultrathin cobalt nanosheets (CoNs) consisting of nanosized Co clusters were successfully synthesized (see figure). The as-prepared CoNs display ferromagnetic behavior and a large thermal irreversibility. This strategy has been used also in the synthesis of Fe and Ni nanosheets.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 39
·期 7
·5750-5758
·
IF 3.086
Yinghui Bian,Jinshe Chen,Shaotang Xu,Yulu Zhou,Lijun Zhu,Yuzhi Xiang,Daohong Xia
Two novel metal-free phthalocyanines have been designed and synthesized, namely tetra{[1H-benzo(d)imidazol-2-yl]thiol}phthalocyanine (TBIT-Pc) and tetra{[benzo(d)thiazol-2-yl]thiol}phthalocyanine (TBTT-Pc). These two compounds showed similar structures, while imidazolyl-NH in the substitutes of TBIT-Pc could form more hydrogen bonds. TBIT-Pc and TBTT-Pc were fully characterized by elemental analysis, 1H NMR, MALDI-TOF MS, FT-IR and the UV-Vis absorption spectrum. The self-assembly properties of TBIT-Pc and TBTT-Pc were comparatively studied. TBIT-Pc and TBTT-Pc were present as monomers in DMF in the concentration range of 9.04–20.3 μM. Depending mainly on the intermolecular hydrogen bonding (N–H⋯N) between benzimidazole substitutes, “head-to-tail” J-aggregates of TBIT-Pc were formed in DMSO, while there was no aggregation of TBTT-Pc in the same solvent. “Face-to-face” H-aggregates of TBIT-Pc and TBTT-Pc were formed with the addition of water to the solutions of DMSO, and the degree of aggregation increased with the introduction of H-bonds (N–H⋯N) in the benzimidazole substitutes of TBIT-Pc. The atomic force microscope (AFM) image and dynamic light scattering (DLS) displayed the formation of well-defined nanoparticles with a diameter of ca. 30 ± 15 nm with J-type aggregation of TBIT-Pc. And the dendritic nanostructures with H-aggregates of TBIT-Pc and TBTT-Pc with different size were observed from transmission electron microscopy (TEM) images. The possible mechanism of the effect of H-bonds on the formation of J-aggregates of TBIT-Pc and the H-aggregation of TBIT-Pc and TBTT-Pc was also discussed. In the formation process of aggregates, H-bonds and π–π interaction may be the dominant factors. In addition, the nanostructures fabricated from TBIT-Pc and TBTT-Pc showed good semiconducting properties revealed by current–voltage measurements.
研究领域:
超分子化学
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材料科学
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DOI
高影响因子
Micromachines
·
2015
·Vol. 6
·期 9
·1331-1345
·
IF 1.269
Juan Wang,Mingliang Jin,Tao He,Guofu Zhou,Lingling Shui
We report on the microfluidic induced monodispersed microdroplet generation and assembly in confined microchannels. Two and three dimensional close-packed droplet lattices were obtained in microfluidic devices by adjusting the channel geometry, the fluidic flow rates and the monodispersed droplet size. The droplet packing was mainly caused by the volumetric effect and capillarity in confined microchannels. Polymerizable fluids were also investigated to demonstrate the effect of fluidic properties on the microdroplet generation and assembly, which could find interesting applications in the future. This approach would be helpful to fundamentally understand the mechanism of self-assembly process of particles in confined microstructures, and practically be applied in sensing and energy storage devices.Keywords:microfluidics;microdroplet;self-assembly;close-packed configuration
研究领域:
物理学
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材料科学
·
化学工程
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DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Zhifu Guan,Yiqi Jin,Sha Shi,Biyao Jin,Meishan Zhang,Lianhua Zhao
To enhance the conductivity of sulfonated polyether ether ketone (SPEEK, SP) membrane and avoid the loss of ionic liquid (IL), using aminopropyloligosisiloxane (NH 2 -POSS) as molecular hybrid filler, a self-assembled medium temperature and non-humidified SP/IL/NH 2 -POSS hybrid membrane was prepared. NH 2 -POSS can be assembled into the hydrophilic domain ion phase of SPEEK. In which, –NH 2 of NH 2 -POSS and –SO 3 H of SPEEK formed acid-base pairs at the interface which were conducive to the construction of proton transport channel. In addition, NH 2 -POSS enriched IL in the hydrophilic domain, which retained IL while synergistically increased the conductivity. The results showed that the IL loss rate of SP/IL/NH 2 -POSS-2 membrane was 46.9 wt%, which was about 55.8% of SP/IL membrane; the conductivity of SP/IL/NH 2 -POSS-2 membrane at 200 °C without humidification was 5.51 mS·cm −1 , which was about 4 times that of SP/IL membrane.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 12
·4570
·
IF 4.6
Hongyang Song,Lei Xing,Jinjian Wei,Xue Wang,Yaozhen Yang,Pengbo Zhe,Mingming Luan,Jing Xu
Titanium (Ti) and its alloys are widely used in medical treatment, engineering, and other fields because of their excellent properties including biological activity, an elastic modulus similar to that of human bones, and corrosion resistance. However, there are still many defects in the surface properties of Ti in practical applications. For example, the biocompatibility of Ti with bone tissue can be greatly reduced in implants due to a lack of osseointegration as well as antibacterial properties, which may lead to osseointegration failure. To address these problems and to take advantage of the amphoteric polyelectrolyte properties of gelatin, a thin layer of gelatin was prepared by electrostatic self-assembly technology. Diepoxide quaternary ammonium salt (DEQAS) and maleopimaric acid quaternary ammonium salt (MPA−N+) were then synthesized and grafted onto the thin layer. The cell adhesion and migration experiments demonstrated that the coating has excellent biocompatibility, and those grafted with MPA−N+promoted cell migration. The bacteriostatic experiment showed that the mixed grafting with two ammonium salts had excellent bacteriostatic performance againstEscherichia coliandStaphylococcus aureus, with bacteriostasis rates of 98.1 ± 1.0% and 99.2 ± 0.5%, respectively.Keywords:Ti;osseointegration;antibacterial;electrostatic self-assembly technology
研究领域:
生物材料学
·
医学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2023
·
IF 5.8
Haibo Huang,Lihang Chen,Yiyang Hou,Wanying He,Xinchuang Wang,Dan Zhang,Jiangning Hu
Wound healing remains a considerable challenge due to its complex inflammatory microenvironment. Developing novel wound dressing materials with superior wound repair capabilities is highly required. However, conventional dressing hydrogels for wound healing are often limited by their complex cross-linking, high treatment costs, and drug-related side effects. In this study, we report a novel dressing hydrogel constructed only by the self-assembly of chlorogenic acid (CA). Molecular dynamic simulation studies revealed the formation of CA hydrogel was mainly through non-covalent interactions, such as π-π and hydrogen bond . Meanwhile, CA hydrogel exhibited superior self-healing, injectability, and biocompatibility properties, making it a promising candidate for wound treatment. As expected, in vitro experiments demonstrated that CA hydrogel possessed remarkable anti-inflammatory activity, and its ability to promote the generation of microvessels in HUVEC cells, as well as the promotion of microvessel formation in HUVEC cells and proliferation of HaCAT cells. Subsequent in vivo investigation further demonstrated that CA hydrogel accelerated wound healing in rats through regulating macrophage polarization. Mechanistically, the CA hydrogel treatment enhanced the closure rate, collagen deposition, and re-epithelialization while simultaneously suppressing the secretion of pro-inflammatory cytokines and increasing the production of CD31 and VEGF during the wound healing process. Our findings indicate that this multifunctional CA hydrogel is a promising candidate for wound healing, particularly in cases of impaired angiogenesis and inflammatory responses.
研究领域:
生物材料学
·
医学
·
药理学
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产品关联
DOI
PubMed
高影响因子
Foods
·
2023
·Vol. 12
·期 10
·1931
·
IF 5.2
Dashan Guo,Yuwei Hou,Hongshan Liang,Lingyu Han,Bin Li,Bin Zhou
The distinctive assembly behaviors of lysozyme (Lys) feature prominently in food, materials, biomedicine, and other fields and have intrigued many scholars. Although our previous work suggested that reduced glutathione (GSH) could induce lysozyme to form interfacial films at the air/water interface, the underlying mechanism is still obscure. In the present study, the effects of GSH on the disulfide bond and protein conformation of lysozyme were investigated by fluorescence spectroscopy, circular dichroism spectroscopy, and infrared spectroscopy. The findings demonstrated that GSH was able to break the disulfide bond in lysozyme molecules through the sulfhydryl/disulfide bond exchange reaction, thereby unraveling the lysozyme. The β-sheet structure of lysozyme expanded significantly, while the contents of α-helix and β-turn decreased. Furthermore, the interfacial tension and morphology analysis supported that the unfolded lysozyme tended to arrange macroscopic interfacial films at the air/water interface. It was found that pH and GSH concentrations had an impact on the aforementioned processes, with higher pH or GSH levels having a positive effect. This paper on the exploration of the mechanism of GSH-induced lysozyme interface assembly and the development of lysozyme-based green coatings has better instructive significance.Keywords:reduced glutathione;lysozyme;defolding;self-assembly
研究领域:
食品科学
·
材料科学
·
生物医学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 50
·40249-40257
·
IF 3.84
Zhimin Ren,Siqi Yu,Xinxin Fu,Lin Shi,Chunxiao Sun,Chenyao Fan,Qi Liu,Guodong Qian,Zhiyu Wang
In this study, we have demonstrated coordination-driven self-assembly between Fe3O4 and graphene sheets under a hydrothermal condition for the simple in situ synthesis of a 3D Fe3O4–graphene hybrid architecture (Fe3O4/G). Fine hierarchical Fe3O4 spheres were homogeneously dispersed and embedded in an interconnected mesoporous framework of graphene sheets. It can be noted that the critical concentration of GO assembly decreased dramatically during the self-assembly of Fe3O4, indicating the coordination-driven self-assembly between Fe3O4 and GO. When evaluated as an anode material for LIBs, the Fe3O4/G hybrid framework demonstrates a high reversible capacity of 1164 mA h g−1 over 500 cycles at a current density of 500 mA g−1 and a remarkable rate capability. The superior electrochemical performance is attributed to a strong adhesion force and synergistic effect between Fe3O4 and graphene sheets as well as formation of a 3D interconnected hybrid framework, which offers enhanced kinetics towards electrochemical reactions with lithium ions and provides space for alleviating the huge volume expansion that occurs during charge–discharge cycles.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）