SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xinjian Hu,Fei Chai,Guanghui Li,Lili Yan,Pinhua Rao,Wenqi Zhang,Jihyeon Kim,Sangsook Park,Runkai Wang
The treatment of oil-containing wastewater poses significant environmental challenges due to its complex composition and high emulsification. Membrane technology offers an energy-efficient alternative for oil–water separation. This study explores the surface physicochemical properties, self-cleaning capabilities, and high-temperature oil–water separation applications of silicon carbide (SiC) ceramic membranes modified with a tannic acid/polyethyleneimine (TA/PEI) complexes. The TA/PEI@SiC membrane, prepared via a complex solution, exhibits increased water contact angle but still maintains hydrophilicity and underwater superoleophobicity. The TA/PEI@SiC membrane demonstrated exceptional high-temperature stability, maintaining separation efficiency above 97.73 % across a range of temperatures (60–90 °C). In cyclic tests, the membrane maintained emulsion separation efficiencies of 99.53–99.95 % at 60 °C, 98.59–99.53 % at 70 °C, 98.75–99.68 % at 80 °C, and 97.53–99.39 % at 90 °C. Research has shown that oil droplets can spontaneously detach from the membrane surface underwater, demonstrating effective self-cleaning properties.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Zhenmin Wu,Jie He,Guoyu Zhao,Xiaoyan Tang,Junqing Li,Wenhang Chen,Ruiqi Li
The current membrane materials used for oil–water separation suffer from low separation efficiency and poor durability, and membrane contamination is also a key issue that must be addressed urgently. In this paper, a superhydrophilic PANI/Ag/TA@PVDF composite membrane with PANI-Ag NPs heterojunction structure was prepared via chelation and reduction of Ag+ by tannic acid (TA) and in situ growth of hydrochloric acid-doped polyaniline (PANI). TA endows the prepared composite membrane with excellent superhydrophilicity and underwater oleophobicity, remarkable oil–water separation capacity (the separation efficiency of more than 97% for soybean oil), and extraordinary antifouling properties. Notably, the range of photodegradation is expanded from UV to visible light by the construction of a Schottky heterostructure between PANI and Ag NPs, the photocatalytic degradation ability of composite membrane for organic pollutants has been improved obviously, and the degradation efficiency for crystal violet (CV) is 97.9%. Considering these merits, the PANI/Ag/TA@PVDF composite membrane provides an effective strategy to overcome the shortcomings of existing membrane materials, presenting enormous potential in the treatment and purification of oily wastewater.
研究领域:
材料科学
·
环境工程
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 30
·2315813
·
IF 18.5
Ying Liu,Guoxing Tian,Yingjie Du,Pengju Shi,Na Li,Yunfeng Li,Zhihui Qin,Tifeng Jiao,Ximin He
As wearable sensors advance rapidly, demands for multifunctional conductive soft materials are ever higher, including high stretchability, resilience, adhesiveness and stability, simultaneously in one material, for stable long-term use. Nanocomposite hydrogels incorporating conductive two-dimensional (2D) nanofillers, such as MXene-composited gels, emerge as promising candidates. Yet, fulfilling all above requirements, particularly large stretchability with low hysteresis, remains a challenge, owing to the easy oxidation and weak interactions of MXene nanosheets with polymer chains. Herein, an interfacial engineering strategy is proposed, where tannic acid (TA) with high-density hydroxyl groups is introduced to encapsulate MXene into a stable TA@MXene nano-motif and meanwhile increase the hydrogen-bonding interactions between TA@MXene and polymer network. By incorporating TA@MXene into poly(hydroxyethyl acrylate) (PHEA) network in a glycerol/water binary solvent, the obtained organohydrogel exhibits integrated properties of high stretchability (>500%) with low hysteresis (<3%), superior fatigue resistance (consistent hysteresis over 500 cycles at 300% strain), good adhesiveness, along with long-term stability (>7 days) and antifreezing abilities (−40 °C). Such organohydrogels demonstrate superior strain-sensitivity and thermosensitive capacities, enabling accurate and reliable detection of human movements, electrocardiogram signals, and body temperature. This general approach of stabilizing nanomaterials while effectively enhancing nanomaterial-polymer bonding is applicable for synthesizing diverse high-performance nanocomposited gels.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 14
·1888-1895
·
IF 3.474
Chao Cai,Tang Zhu,Dongdong Li,Yun Ran,Haixia Dong,Ning Zhao,Jian Xu
In this paper, tannic acid (TA) was used to assist the fabrication of spherically aggregated Cu2O–TA hybrid sub-microparticles with good chemical stability and controllable sizes. TA exhibited multiple functions in the synthesis: the reductant for the formation of Cu2O crystal seeds, the stabilizer of the primary Cu2O crystals and the protector against the oxidation of Cu2O. A probable mechanism was presumed, including 1) seed formation and TA encapsulation, 2) primary crystal nucleation and growth, and 3) aggregation into spheres. We found that pH played a key role in determining the final morphology of the product while the precursor concentration strongly influenced the size of the particles. At a suitable pH, hierarchically structured Cu2O–TA sub-microspheres with nanocrystals as building blocks were produced. The size of the spheres can be tuned from 130 to 670 nm by adjusting the precursor concentration. Cu2O–TA hybrids exhibited excellent chemical stability against water and oxygen. The method reported here possessed many advantages like cost-effectiveness, facility of preparation, environmental friendliness, chemical stability and excellent adjustability. The properties of the prepared Cu2O particles might facilitate their applications in marine antifouling paints, adsorption materials and antibacterial agents.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 5
·1-15
·
IF 2.7
Qian Qian,Bao Shuxiang,Xia Juan,Lu Wangyang,Li Nan
Conductive hydrogel flexible sensors have attracted widespread attention in the field of wearable electronic devices, which typically possess the properties of stretch resistance, moisture retention, antifreeze, adhesion, and self-healing. Herein, a silk nanofiber–tannic acid (SNF@TA) is successfully introduced into a polyvinyl alcohol (PVA) hydrogel to prepare a rigid and adhesive PVA–SNF@TA organohydrogel, exhibiting good mechanical strength (up to 365 kPa) and excellent self-healing properties. Due to the presence of conductive ions and ethylene glycol, the PVA–SNF@TA organohydrogel presents high sensitivity and cold resistance (− 18 °C). Moreover, the PVA–SNF@TA organohydrogel maintains a good transparency of 91% and ultraviolet filtration capacity. A strain sensor made of PVA–SNF@TA organohydrogel has good adhesion and accurate sensing signals. Generally, the designed sensor can significantly monitor small deformations, such as frowning, blinking, smiling, and swallowing motions, showing an impressive sensitivity (gauge factor 1.094) and stable (1000 stretching cycles) variable sensing characteristics. More specifically, a pressure sensor consisted of a PVA–SNF@TA organohydrogel cylinder keeps good sensing stability, thereby desirably detecting different large movements of the human body (finger pressing, walking and running). Our work can offer a broad avenue for the advanced architecture of functional hydrogel materials, which has great potential in the field of human exercise and health monitoring. Graphical abstract
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高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 35
·2302847
·
IF 29.4
Ju Bai,Wen Gu,Yuanyuan Bai,Yue Li,Lin Yang,Lei Fu,Shengzhao Li,Tie Li,Ting Zhang
Multifunctional selectivity and mechanical properties are always a focus of attention in the field of flexible sensors. In particular, the construction of biomimetic architecture for sensing materials can endow the fabricated sensors with intrinsic response features and extra-derived functions. Here, inspired by the asymmetric structural features of human skin, a novel tannic acid (TA)-modified MXene-polyurethane film with a bionic Janus architecture is proposed, which is prepared by gravity-driven self-assembly for the gradient dispersion of 2D TA@MXene nanosheets into a PU network. This obtained film reveals strong mechanical properties of a superior elongation at a break of 2056.67% and an ultimate tensile strength of 50.78 MPa with self-healing performance. Moreover, the Janus architecture can lead to a selective multifunctional response of flexible sensors to directional bending, pressure, and stretching. Combined with a machine learning module, the sensor is endowed with high recognition rates for force detection (96.1%). Meanwhile, direction identification in rescue operations and human movement monitoring can be realized by this sensor. This work offers essential research value and practical significance for the material structures, mechanical properties, and application platforms of flexible sensors.
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DOI
PubMed
高影响因子
Science China-Materials
·
2023
·Vol. 66
·期 8
·3213-3222
·
IF 8.1
Wen Zihao,Meng Hong,Jiang Shengda,Tang Zhongyu,Liu Yiwen,Chu Yanhui
Developing superior oxidation resistance of high-entropy diborides is critical for extending their potential applications in harsh environments. Herein, we developed non-equimolar (Hf,Zr,Ta,W)B 2 high-entropy diborides with superior oxidation resistance by adjusting W contents for the first time. The as-fabricated (Hf 0.28 Zr 0.28 Ta 0.28 W 0.15 )B 2 samples are predicted to possess superior oxidation resistance at 1473–1773 K through the oxidation depth quantitative analysis obtained by machine learning, which is attributed to the reason that the moderate WO 3 can effectively inhibit the volatilization of B 2 O 3 . Furthermore, a four-layered structure is found in the generated product layers at 1773 K, which is due to the preferential oxidation of Hf and Zr elements at low oxygen partial pressure and the different diffusion activation energies of oxide products. The preferential oxidation of Hf and Zr elements is further demonstrated by the computational phase stability diagrams, and oxygen adsorption energies and charge transfer between oxygen atoms and different metal adsorption sites via first-principles calculations. Such superior performance endows (Hf 0.28 Zr 0.28 Ta 0.28 W 0.15 )B 2 with potential applications as ultrahigh-temperature structural materials.
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DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2018
·Vol. 43
·期 7
·637-641
·
IF 1.749
Naimeng Song,Jianchao Liu,Guoying Zhang,Zhenzhan Yan,Hongxu Gao,Li Yang
This paper describes the preparation of two combustion catalysts Tannin-Fe (Ta−Fe) and Phloroglucinol-Fe (Ph−Fe) by spray drying. The particle size and morphology of the particles are observed by scanning electron microscopy (SEM). The results of SEM image show that the particles are regular spherical and very good dispersion. The diameter of most spherical particles is about 1 μm. The effects of Ta−Fe and Ph−Fe on the thermal decomposition of RDX and AP were tested by differential scanning calorimeter (DSC). DSC dates show that Ta−Fe and Ph−Fe can advance the high temperature exothermic peak of AP 18.0 °C and 16.1 °C, respectively. The burning rates illustrates that both Ta−Fe and Ph−Fe can significantly increase the combustion rate of HTPB propellants. The formulation with 2 mass% Ta−Fe shows an average 21.31 % increase in burning rate and has a low value of the exponent n=0.48. The formulation with 2 mass%Ph−Fe has a burning rate 20 to 60 % larger than that of the initial AP/HTPB/Al formulation, and has a lowest exponent n=0.45.
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Miao Qin,Wenfeng Yuan,Xiumei Zhang,Yizhu Cheng,Mengjie Xu,Yan Wei,Weiyi Chen,Di Huang
Conductive hydrogels based on MXene have gained more attention due to the excellent conductive property and biocompatibility. At present, they have great potential in electronic skins, personally healthcare monitoring and human motion sensing. However, MXene are prone to be oxidized due to the abundant hydroxyls , which results in the unstable conductive property of hydrogel. To improve the shortcoming, conductive PAA/PAM/MXene/TA hydrogel was prepared, in which the introduction of TA can prevent MXene from oxidation owing to the great deal of pyrogallol groups. Mechanical tests showed that the tensile strength , toughness and elongation at break of PAA/PAM/MXene/TA hydrogel are 0.251 ± 0.05 MPa, 0.895 ± 0.16 MJ/m 3 and 560.82 ± 19.56%, respectively, indicating the hydrogel possess good stretchability. In addition, the MXene and TA were introduced into hydrogel through hydrogen bonds , which endow the hydrogel with good restorability and self-healing property. Resistance variation-strain curves demonstrated that the introduction of MXene endue the hydrogel with appreciable sensing performances. Moreover, in vitro cytotoxicity assay indicated that the hydrogel has good biocompatibility. In conclusion, PAA/PAM/MXene/TA hydrogel has great potential in flexible wearable sensor field.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2019
·Vol. 34
·期 24
·4045-4055
·
IF 1.982
Bo-Qiong Li,Xin-Cheng Li,Xing Lu
In recent years, there has been a significant thrust toward the development of novel implant alloys based on β-Ti with low Young’s modulus to prevent stress shielding. In this study, porous Ti–Nb–Ta–Zr alloys with porosity of <55% and macro-pore size of 100–400 μm for biomedical applications were successfully fabricated by a space-holder method. The microstructure and compressive behavior were studied. The results show that the micro-pore size of porous Ti–Nb–Ta–Zr alloys decreases with an increase in the amount of the process control agent (PCA), which has no obvious effect on the porosity and the macro-pore size formed by the space holder. Porous Ti–Nb–Ta–Zr alloys fail mainly because of the cleavage and ductile fracture with some dimples in compression. The compressive modulus increases from 0.6 to 6.5 GPa with the increase in the PCA and decrease of the space holder. The influence mechanism has been analyzed by the finite element calculation and the Gibson–Ashby model.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 4
·3768-3773
·
IF 1.798
Shen Zhengbo,Wang Xiaohui,Li Longtu
Ta-doped 0.90BaTiO 3 –0.10(Bi 0.5 Na 0.5 )TiO 3 ceramics were successfully prepared by conventional solid-state reaction method and studied to satisfy super-broad temperature stability. The effects of Ta 2 O 5 doping on the dielectric properties and microstructures were thoroughly investigated. Ta plays an important role in the formation of core–shell structure because of chemical inhomogeneity, which gives rise to the weak temperature dependence of dielectric properties. The samples with the additon of 1.5 mol% Ta 2 O 5 satisfy the X9R specification, exhibiting an optimum dielectric behavior of ε
r
~ 2100, tanδ ~ 1.6% at room temperature, which is a promising candidate material for X9R MLCC applications.
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高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2022
·
IF 6.51
Xiang Bao,Qianying Zhu,Yunyun Chen,Huijuan Tang,Weimin Deng,Haixia Guo,Li Zeng
Prevention of bacterial contamination, maintenance of redox balance in the environment, and acceleration of wound healing are key requirements for wound dressing. In the present study, hyaluronic acid (HA)/graphene (Gr)-electrospun fibre films loaded with polyphenolic tannic acid (TA) were prepared using electrospinning. The antioxidant activity of the films was then examined to determine whether they contained optimal TA concentrations for subsequent research. Following that, the surface morphology and physicochemical properties of the films were determined and in vitro experiments were conducted to assess their biocompatibility and antibacterial activity. Finally, the in vivo effects of the electrostatically spun fibre films on infected wound healing in mouse models were observed. The HA/Gr/TA-electrospun fibre film with 0.3% w/v TA concentration displayed the best antioxidant activity and better mechanical, water-absorption, water-retention, and degradation properties than the film without TA. In addition, it displayed superior antibacterial activity and biocompatibility, as well acceleration of infected wound healing, than the film without TA. Therefore, the HA/Gr/TA-electrospun fibre film is a promising alternative option for wound dressings.
研究领域:
材料科学
·
生物材料
·
伤口护理
·
纳米技术
·
药学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）