RSC Sustainability
·
2024
·
IF 0
Yanling Wu,Xingda Wang,Hao Li,Qingyuan Luo,Xuan Li,Xinlei Zheng,Kexin Xu,Yanteng Wu,Jin Li
Since the development of polymer-modified asphalt, its functionality and preparation process have been continuously optimized, thus improving driving comfort and extending the service life of asphalt pavements. However, traditional polymer-modified asphalt is faced with certain limitations in terms of production and storage. To address these issues and enhance the storage stability of modified asphalt materials, a novel polyurethane (PU) elastomer with high elasticity and self-healing properties, named S-PU, was developed using dynamic covalent bond reversible technology. S-PU was applied as a modifier for asphalt modification. Through conventional performance and fluorescence microscopy (FM) tests, the optimal dosage of S-PU for asphalt modification was determined. The best asphalt modification effect was achieved when the S-PU content was 10%. Furthermore, atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FT-IR) were employed to analyze the micromorphology and modification mechanism of S-PU-modified asphalt. The results reveal an increase in the size of the “bee-like” structures after asphalt modification, along with chemical crosslinking between S-PU and asphalt molecules. This study introduces a novel approach for preparing self-healing asphalt through the utilization of dynamic covalent chemistry, offering new perspectives in the field.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Qinzhe Li,Yewei Zhang,Xuan Huang,Dongliang Yang,Lixing Weng,Changjin Ou,Xuejiao Song,Xiaochen Dong
Drug-resistant bacterial infection is a serious threat to the survival and health of human. Clinically, the conventional therapy for subcutaneous infections generally involves the systemic administration of high dose of antibiotics and frequently causes detrimental side effects in normal tissues. To overcome this issue, an acidity-responsive near infrared (NIR) light-triggered injectable hydrogel was designed for non-antibiotic local treatment. Herein, poly(ethylene glycol) diacrylate (PEGDA) was used as hydrogel matrix, polyoxometalate (POM) as acidity-enhanced photothermal agent and 2,2′-azobis[2-(2-imidazolin-2-yl) propane] dihydro-chloride (AIPH) as thermo-responsive initiator. After the hydrogel precursor solution (AIPH/POM/PEGDA) was injected into the acidic infected tissue, the aggregated POM with strong photothermal property was restricted to the site of abscess. Upon excitation at 1060 nm laser, the heat generated from POM would trigger alkyl radical formation from AIPH and thereafter achieving NIR-triggered in situ gel. Consequently, the POM and AIPH were trapped in Gel(AIPH/POM) and exhibited long-term retention in the abscess for further repeated local photothermal/thermodynamic antibacterial therapy. In vitro antibacterial evaluation indicated that the system could effectively eradicate drug-resistant bacteria through destroying bacteria integrity and producing the noxious alkyl radical under NIR light illumination. Moreover, the bacterial burden of abscess was significantly relieved and more collagens were deposited after the administration of Gel(AIPH/POM) and repeated NIR light. Meanwhile, no apparent adverse effect was observed during the treatment. This work not only provides a light-triggered gelation for local photothermal/thermodynamic synergistic therapy, but also offers a novel strategy for the rational design of light-responsive intelligent antibacterial hydrogels.
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高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 7
·3801-3807
·
IF 7.443
Lianyi Xu,Dandan Zhu,Xuemin Lu,Qinghua Lu
By mimicking nature, the preparation of artificial self-cleaning surfaces has gradually matured both in theory and technology, but their actual application has been hampered by enormous difficulties. The main challenge is that their design principle (i.e., their requirement for micro- and nano-structures) is difficult to reconcile with the need for coating strength and transparency. Here, we have exploited a porous structured silica coating with the help of an electrodeposited porous PEDOT template. This porous silica coating not only provides the requisite roughness for the final superhydrophobic surface, but also has a low refractive index, thereby enhancing the transparency of the silica coating. After fluorination, a highly transparent, thermally and mechanically stable superhydrophobic coating was obtained. The silica coating is found to withstand tests of harsh environments, such as mechanical resistance and ultra-high hydraulic pressure tests. This large-area superhydrophobic coating has great potential for use in solar cells and self-cleaning windows.
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高影响因子
ACS ES&T Water
·
2024
·
IF 4.8
Zhennan Zhou,Haibo Li,Yikang Lin,Jiali Fan,Hua Tong,Jing Yang,Wei Liu,Gangfeng Ouyang
It is necessary and urgent to develop new materials that are sensitive to antibiotics and can detect them in wastewater. Here, we report a zwitterionic copper(I)-iodide hybrid cluster with strong luminescence and excellent stability. We demonstrate for the first time that this compound can be an efficient optical sensor for tetracyclines, a widely used type of antibiotic, in an aqueous system, with the limit of detection reaching as low as 521–851 ppb. Further, possible electron and energy transfer mechanisms are discussed. This study has opened up new applications for this type of material in the field of chemical sensing.
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高影响因子
Nanomaterials
·
2017
·Vol. 7
·期 3
·67
·
IF 3.553
Chongdai Luo,Yangyang Wang,Xuemeng Li,Xueqin Jiang,Panpan Gao,Kang Sun,Jianhua Zhou,Zhiguang Zhang,Qing Jiang
Saliva contains important personal physiological information that is related to some diseases, and it is a valuable source of biochemical information that can be collected rapidly, frequently, and without stress. In this article, we reported a new and simple localized surface plasmon resonance (LSPR) substrate composed of polyaniline (PANI)-gold hybrid nanostructures as an optical sensor for monitoring the pH of saliva samples. The overall appearance and topography of the substrates, the composition, and the wettability of the LSPR surfaces were characterized by optical and scanning electron microscope (SEM) images, infrared spectra, and contact angles measurement, respectively. The PANI-gold hybrid substrate readily responded to the pH. The response time was very short, which was 3.5 s when the pH switched from 2 to 7, and 4.5 s from 7 to 2. The changes of visible-near-infrared (NIR) spectra of this sensor upon varying pH in solution showed that—for the absorption at given wavelengths of 665 nm and 785 nm—the sensitivities were 0.0299 a.u./pH (a.u. = arbitrary unit) with a linear range of pH = 5–8 and 0.0234 a.u./pH with linear range of pH = 2–8, respectively. By using this new sensor, the pH of a real saliva sample was monitored and was consistent with the parallel measurements with a standard laboratory method. The results suggest that this novel LSPR sensor shows great potential in the field of mobile healthcare and home medical devices, and could also be modified by different sensitive materials to detect various molecules or ions in the future.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
·
IF 5.107
Muntadher M. Alwan Almijbilee,Xitian Wu,Ayang Zhou,Xiaokuo Zheng,Xingzhong Cao,Wei Li
An interfacial assembly and polymerization procedure was adopted to synthesized organic solvent polyetheramide thin film composite (TFC) nanofiltration membrane using 4,4′-oxydianiline (ODA) and trimesoyl chloride (TMC) monomers upon the ethylenediamine-crosslinked polyetherimide (C-PEI) membrane substrate. DFT calculations indicate that the unreacted amine terminals located on the C-PEI membrane surface can form intermolecular hydrogen bonding with the ether group of ODA molecule meanwhile π-π stacking interaction could be formed among the aromatic rings of ODA and the aromatic section in the backbone of C-PEI. The separation efficiency of the synthesized polyetheramide TFC membranes was assessed with some organic solvents and characterized through ATR-FTIR, 13 C NMR, XPS, SEM, DBES, etc. S parameters of DBES measurement indicate that the organic solvent activation indeed influences the arrangement of the polymer chain in the synthesized membrane layers, and consequently makes the diffusion faster through the top layer of the membrane. Through activating the TFC membrane by THF solvent, the optimum TFC membrane showed a rejection of 96.3% toward Crystal Violet (CV) (Mw 407.98 g mol −1 ) with a THF permeance around 4.5 L m −2 h −1 bar −1 .
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高影响因子
Nano Energy
·
2016
·
IF 11.553
Qunwei Tang,Hongna Zhang,Benlin He,Peizhi Yang
Future solar cells may produce electricity in all weathers. We present here a cost-effective and high-efficiency graphene based conducting composite tailored all-weather solar cell that can be actuated with raindrops and sunlight. Due to the formation of π-electron|cation double-layer pseudocapacitance at conducting composite/raindrop interface, the delocalized π-electrons on graphene can migrate along percolating pathways forward at spreading process and backward at shrinking periods, resulting in charging and discharging of the pseudocapacitor. The optimized solar cell yields a photoelectric conversion efficiency of 9.8% under simulated sunlight irradiation (air mass 1.5, 100 mW cm −2 ) as well as current over several microamps and voltage of hundreds of microvolts under simulated raindrops. This work could extend our knowledge of future all-weather solar cells.
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高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2018
·Vol. 56
·期 21
·2437-2444
·
IF 2.588
Lei Yu,Yanlong Wei,Yuanyuan Tu,Shudong Lin,Zhenzhu Huang,Jiwen Hu,Yue Chen,Hang Qiao,Wei Zou
We report herein a visible light-induced metal-free living polymerization with high oxygen tolerance that can be performed in aqueous media. In contrast with ordinary living/controlled radical polymerizations, oxygen can be present throughout the entire reaction process. This reaction can be photo-induced and proceeds at room temperature. First, we have successfully synthesized a well-defined polymer in an ambient atmosphere by the photo-induced radical polymerization method, using acrylic acid as a monomer and fluorescein as a photocatalyst. However, the subsequent chain extension reaction did not occur, possibly due to oxidation of the chain transfer agent (CTA). Despite this, we found that the addition of vitamin C (ascorbic acid) imparted the process with oxygen tolerance. We conducted a systematic study to optimize the best concentrations of the key reagents including the monomer, CTA, fluorescein, and vitamin C. Through these optimizations we were able to synthesize in the presence of oxygen a series of well-defined poly(acrylic acid)s (PAAs) with dispersities ( Ð ) below 1.3 and molecular weights that closely matched the theoretical values. The kinetic study showed that the molecular weight of the produced PAA increased linearly with the conversion of the monomer, and chain extension reaction also yielded a block polymer with a higher molecular weight than that of the previous polymer. Therefore, we developed a novel photo-induced living polymerization method that can be conducted both in the absence of oxygen and in the presence of air. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56 , 2437–2444
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Ziyi Cai,Jiafu Shi,Weiran Li,Yizhou Wu,Yishan Zhang,Shaohua Zhang,Zhongyi Jiang
Enclosed films, also called capsules, bearing an ultrathin and robust nanoshell have sparked much interest for use in many applications, for which facile preparation methods are urgently pursued. Inspired by the pH-programmed adhesion/cohesion of mussel-secreted foot proteins, polyphenol/polyamine capsules with an ultrathin and robust nanoshell are fabricated through a pH-switched assembly on sacrificial calcium carbonate (CaCO3) templates. Polyphenols adhere to the templates at pH 6.0 and rapidly cohere with polyamines at pH 8.0. The pH-switched assembly process is accomplished in only a few minutes where multiple instances of electrostatic interactions and chemical conjugation between polyphenols and polyamines occur. As a result, the capsules exhibit a nanoshell thickness of ∼10 nm and a superior mechanical strength of ∼1.575 GPa (elasticity modulus). Cell mimics are prepared through encasing enzymes in the lumen and present an activity recovery of ∼70% along with little activity decline during reuse. Amine or phenolic groups on the nanoshell of capsules are then applied to induce the generation of titania or silver nanoparticles, which may expand the applications of the capsules to the photo- and biorelated realms. Our study not only deepens the understanding of the adhering process of mussels but also offers a generic method toward functional materials for diverse applications.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 31
·期 1
·1-14
·
IF 2.8
Song T.,Ren L.,Li W. B.,Liu Q.,Qin Y. X.,Zhang Y. L.,Wang Y. B.,Shen Y. D.,Du W. N.,Zhang M. Y.
In this contribution, isosorbide dinonanoate (SDN), an environmentally sustainable plasticizer for polypropylene (PP), is successfully synthesized by virtue of esterification reaction using isosorbide and nonanoic acid with the reaction temperature of 120 °C, and the reaction time of 5 h. When the corporation of plasticizer SDN into PP matrix is the value of 15 phr, the impact strength of PP blends reaches 121 J/m, the dramatically increase of 384% compare to that of PP. DMA results shows that the glass transition temperature (T g ) of PP blends gradually decline with the increasing amount of SDN, indicating the efficient plasticization action of the SDN. It is suggested that SDN can be feasibly inserted into the non-polar matrix and then more evenly dispersed in matrix, herein, it will increase the distance between the polymer chains, improving the mobility of the molecular chains and the processing performance of the polymers. Furthermore, the plasticizing effect and environmental friendliness of SDN can be a potential replacement for o-phenyl plasticizers in the industry in the future.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 9
·5993-6003
·
IF 3.5
Liang Su,Jiaxiang Lu,Huan Zhang,Xilin Li,Jinbo Wang,Haolun Wang,Sen Lin
The integration of thermal and electromagnetic interference (EMI) insulation is of great significance for fields such as aerospace that face extreme environments. The challenge lies in ensuring that the protective layer is lightweight while simultaneously possessing the ability to suppress heat conduction, heat convection, thermal radiation, and electromagnetic radiation. To address these challenges, we propose a novel ultralight all-fiber-structure composite sponge, yttria-stabilized zirconia/polyvinyl butyral-supported silver (YAP) nanofiber sponge, with ultralight mass (∼65 mg/cm 3 ), exceptionally low thermal conductivity (21 mW/m K at 25°C, and 329 mW/m K at 500°C), and remarkable EMI shielding effectiveness (∼62.6 dB). Moreover, benefiting from its all-fiber-structure, the YAP nanofiber sponge can endure 100 cycles of compression up to 50% of its original volume while retaining its mechanical properties with minimal degradation. These characteristics render YAP nanofiber sponge an ideal material for integrated thermal and EMI insulation, offering a promising solution to the rigorous demands of extreme environment protection such as space exploration.
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高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 44
·6162-6170
·
IF 3.1
Shuai Wen,Huan Liu,Lier Deng,Jijie Zhao,Yuxuan Du,Shengyong Wang,Fei Gao,Zhipeng Zhu,Fei Xie,Weiguo Liu
Broadband photodetectors capable of detecting light across a wide spectrum ranging from visible to short wave infrared (SWIR) wavelengths have significant relevance in various fields, including space technology and civil applications. HgTe quantum dots (QDs) have emerged as a promising candidate for the development of low-cost broadband photodetectors. In this study, a photodetector based on a layered structure of indium tin oxide (ITO)/HgTe QD film/gold (Au) was designed and fabricated using a layer-by-layer spin coating method. The fabricated photodetector exhibited a broadband response from 400 nm to 2000 nm, covering the visible and SWIR regions. Its broad spectral range makes it suitable for a wide range of applications. Additionally, the photodetector demonstrated a fast response time of approximately 300 μs, enabling rapid detection and data acquisition. These results highlight the potential of HgTe QDs as a promising material for the development of advanced broadband photodetectors with fast response times. The simplicity of the device structure, combined with the low-cost fabrication technique, makes it an attractive option for commercialization and integration into various optoelectronic systems.
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高影响因子
危险品化学品经营许可证（带存储）