JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Bin-Bin Chen,Shuai Chang,Lei Jiang,Jian Lv,Ya-Ting Gao,Yue Wang,Ruo-Can Qian,Da-Wei Li,Mahmoud Elsayed Hafez
Carbon dots (CDs), as new type of carbon-based nanoparticles, are considered to be an aggregate with irreversible polymerization. Achieving the reversible tunability of CDs luminescence based on their reversible polymerization is a challenging subject. Herein, we, for the first time, design and construct the blue-emitting CDs with reversible polymerization by a room-temperature Schiff base reaction between tannic acid and ethylenediamine. The formation of CDs is proven to be due to the crosslinking polymerization of precursors caused by imine bond. As a dynamic covalent bond, imine bond endows CDs with controllable structural transformation properties, and the prepared CDs can be depolymerized and polymerized reversibly by pH-controlled imine bond cleavage and re-formation. These properties of reversible fluorescence photoswitching make the CDs have a good application prospect in reversible information encryption.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Song Meng,Zhihao Yao,Jiawei Liu,Erjing Wang,Cao Li,Bingbing Jiang,Ziqiang Xu
Since the excess exposure to F - may induce serious issues to human health, the effective adsorption and sensitive detection of F - is essential. Therefore, carbon dots (CDs) capped CeO 2 (CeO 2 @CDs) was synthesized via hydrothermal treatment of tannic acid and CeCl 3 . Due to abundant phenolic hydroxyl are reserved and excellent hydrophilicity, CeO 2 @CDs possess high F - adsorption capacity. The partition coefficient parameters (PC) are determined to be 2.65 L/g, which is comparable with previous work. The kinetics results and adsorption isotherm are consistent with pseudo-second-order model and Freundlich model, respectively, indicating the chemisorption dominate the adsorption, mainly via the ion exchange between hydroxyl and F - . Since phenolic hydroxyl existed on the CeO 2 @CDs, synergetic effect of CDs and CeO 2 contribute to superior ROS eliminating capacity, even at acidic conditions. Moreover, due to the ROS scavenging of CeO 2 @CDs abilities can be potentiated by F - , colorimetric detection of F - can be realized via horseradish peroxidase as an indicator. The linear range is 0.3–2.1 mM with limit of detection is 0.13 mg/L. The current results imply that CeO 2 @CDs possess potential in both efficient removal and sensitive detection of F - related contamination issues and elucidation of development to address other anions related issues.
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International Journal of Bioprinting
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2022
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IF 7.422
Lanlan Dong,Zhengzhe Han,Xiang Li
Hydrogels have become an attractive option for tissue repair. A novel multifunctional hydrogel was developed using a two-step method involving photopolymerization and tannic acid (TA) solution incubation. The mechanical properties of this hydrogel were enhanced by the multi-hydrogen bond interaction between the TA and N-acryloyl glycinamide/gelatin methacrylate (NAGA/GelMA). The compressive modulus was doubled. The compressive strengths of the hydrogel were 5.5 MPa. The swelling rate was reduced by a factor of three. The adhesion strength of the composite hydrogel reached 80 KPa. The TA-mediated NAGA/GelMA/Laponite composite hydrogel exhibited excellent anti-fatigue and anti-oxidation properties, as well as printability. In vitro experiments indicated that the TA-mediated hydrogel facilitated the proliferation of bone marrow mesenchymal stem cells and osteogenic and chondrogenic differentiation. The developed multifunctional composite hydrogel has great potential for osteochondral defect repair under osteoarthritis conditions.
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E-POLYMERS
·
2022
·Vol. 22
·期 1
·696-704
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IF 3.074
Si Zhang,Zhengjin Xiong,Jian Zhang,Xueting Zhang,Yuhang Chen,Yun Chen
The polymer with imine bonds (C═N) synthesized by condensation of aldehydes and amines was called polyimine. Graphene nanoplatelets (GNPs) were blended into polyimine by imine dynamic chemistry, and GNPs/polyimine (GNPs-P) composites were fabricated by heat-pressing. A series of thermal and mechanical properties have been tested for the matrix and GNPs-P composites. Thermogravimetric analyzer showed that the GNPs were able to improve the thermal stability of the GNPs-P composites. From the test of mechanical properties, GNPs-P composite with 0.5 wt% GNPs was superior to the matrix in bending and tensile properties. The bending and tensile strengths were 92.65 and 73.05 MPa, with an improvement of 18% and 5%. GNPs-P composites with 1 wt% GNPs showed the most significant advancement in impact properties, reaching an impact strength of 11.745 kJ·m −2 with a gain of 21.6%. Cross-sectional observations using scanning electron microscope proved that the GNPs-P composites have brittle fractures. A small number of GNPs could synergize with the matrix by bridging the cracks, creating a crack diffusion resistance and a load transfer reinforcement effect, which improved the mechanical properties of the GNPs-P composites.
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Journal of Functional Biomaterials
·
2022
·Vol. 13
·期 3
·140
·
IF 4.901
Changxin Xiang,Xinyan Zhang,Jianan Zhang,Weiyi Chen,Xiaona Li,Xiaochun Wei,Pengcui Li
Polyvinyl alcohol (PVA) hydrogels are considered to be ideal materials for tissue engineering due to their high water content, low frictional behavior, and good biocompatibility. However, their limited mechanical properties restrict them from being applied when repairing load-bearing tissue. Inspired by the composition of mussels, we fabricated polyvinyl alcohol/hydroxyapatite/tannic acid (PVA/HA/TA) hydrogels through a facile freeze–thawing method. The resulting composite hydrogels exhibited high moisture content, porous structures, and good mechanical properties. The compressive strength and tensile strength of PVA hydrogels were improved from 0.77 ± 0.11 MPa and 0.08 ± 0.01 MPa to approximately 3.69 ± 0.41 MPa and 0.43 ± 0.01 MPa, respectively, for the PVA/HA/1.5TA hydrogel. The toughness and the compressive elastic modulus of PVA/HA/1.5TA hydrogel also attained 0.86 ± 0.02 MJm−3and 0.11 ± 0.02 MPa, which was approximately 11 times and 5 times higher than the PVA hydrogel, respectively. The PVA/HA/1.5TA hydrogel also exhibited fatigue resistance abilities. The mechanical properties of the composite hydrogels were improved through the introduction of TA. Furthermore, in vitro PVA/HA/1.5TA hydrogel showed excellent cytocompatibility by promoting cell proliferation in vitro. Scanning electron microscopy analysis indicated that PVA/HA/1.5TA hydrogels provided favorable circumstances for cell adhesion. The aforementioned results also indicate that the composite hydrogels had potential applications in bone tissue engineering, and this study provides a facile method to improve the mechanical properties of PVA hydrogel.Keywords:bone regeneration;hydrogels;mechanical properties;polyvinyl alcohol;tannic acid
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xueye Wang,Hongyi Han,Huimin Zhou,Tianlin Wang,Ruobin Dai,Zhiwei Wang
Membrane separation is widely adopted in many industries, and the membranes reach their end of life (EOL) after long-term use. However, the conventional approach of replacing EOL membranes has a high carbon footprint, hindering the development of a green, low-carbon, and carbon-neutral process. In this study, we developed a cleaning–tannic acid-iron (TA-Fe)-healing–interfacial polymerization strategy with a reaction time of less than 20 min for the upcycling of an EOL microfiltration (MF) membrane. The cleaning step could remove most of the foulants from the EOL membrane. The TA-Fe healing step decreased the surface pore size and increased the hydrophilicity of the cleaned membrane, offering a more favorable platform for the storage of amine monomers required for interfacial polymerization. The upcycled NF-Healed membrane possessed a Na2SO4 rejection of 96.9 ± 0.7% and high pure water permeance of 23.7 ± 1.4 L m–2 h–1 bar–1. An economic analysis indicated that the chemical cost for upcycling was ∼$4.9/m2 membrane, which was lower than the estimated cost to replace the EOL MF membrane. This study provides a rapid and cost-effective method for the upcycling of the EOL MF membrane, which is a promising strategy to close the sustainable loop in the membrane materials.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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2022
·
IF 6.044
Tao Xiang,Peng Du,Weizong Bao,Zeyun Cai,Kun Li,Guoqiang Xie
Grain refinement is perfectly efficient for improving strength , but accompanies by a dramatic loss of ductility. Here we report a bimodal grain size structure design by inducing ultra-high strength TiZrNbTa high entropy alloy (HEA) with nanoscale grain size into pure Ti with coarse grain size to achieve the strength-strain balance by establishing bimodal grain size distribution (BGSD). Through optimizing the TiZrNbTa HEA content, the 60 wt.% TiZrNbTa/Ti titanium matrix composite (TMC) exhibits a yield strength of 1426 ± 30 MPa, ultimate compressive strength of 2133 ± 88 MPa, and an acceptable compressive strain of 22.3% ± 1.8%, respectively. The compressive yield strength of 60 wt.% TiZrNbTa/Ti TMC is 3.6-fold for c.p. Ti (393.0 ± 7.1 MPa). The unusual high strength is attributed to the nanoscale grain size provided by TiZrNbTa HEA, and the acceptable compressive strain is obtained from the co-effect of coarse grain Ti and TiZrNbTa HEA. The excellent mechanical properties of 60 wt.% TiZrNbTa/Ti TMC undoubtedly greatly increase the possibility of its application as an orthopedic implant in the biomedical field.
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INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
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2022
·Vol. 57
·期 8
·5228-5238
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IF 3.612
Shuya Wang,Bin Zhou,Xinquan Yang,Liqiong Niu,Shugang Li
Summary Clanis Bilineata Tingtauica Mell Protein (CBTMP) was one of the new natural insect protein resources. However, due to its strong surface hydrophobicity and poor emulsion stability, its application has greatly been limited. In this study, Pickering emulsions were prepared by CBTMP–Tannic acid (CBTMP–TA) particles and soybean oil ( φ = 50%). The presence of TA significantly increased the zeta-potential (from −23.5 ± 0.73 to −29.23 ± 0.58 mV) and three-phase contact angle (from 129.9 ± 4.53° to 87.27 ± 3.20°) of complex, especially the concentration of TA was 0.4 m m . Besides, the stability of emulsions was significantly improved according to the results of the droplet size and static multiple light scattering. Furthermore, rheological properties including viscosity, thixotropy and creep recovery were significantly enhanced, which indicated the formation of a more stable network structure. Interfacial behaviour (Interfacial tension, interfacial film viscoelasticity and diffusion rate) of emulsions was significantly changed, forming a more stable interfacial layer as TA content increased. The CBTMP–TA complex was adsorbed at the interface and the adsorption rate was also mainly affected by the content of TA. The study indicated CBTMP–TA compositions to enhance stability, rheological behaviours and interfacial characteristics, and demonstrated the potential applications of insect protein resources in food emulsion systems.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 6
·1-11
·
IF 6.408
Guo Jingjing,Liu Yangyang,Mu Zhao,Wu Shu,Wang Jueyu,Yang Yue,Zhao Min,Wang Yan
A bifunctional Ni-MOF nanosheet was synthesized and developed for label-free fluorescent detection of H 2 O 2 and glucose. The Ni-MOF exhibited intrinsic peroxidase-like activity and its catalytic activity was demonstrated to be originated from the hydroxyl radicals (•OH) produced in catalytic process. Since the generated •OH enabled terephthalic acid, the non-fluorescent organic ligand of Ni-MOF, to form a strongly fluorescent 2-hydroxy terephthalic acid, the Ni-MOF nanozyme was endowed with dual-function properties of mimicking peroxidase and emitting fluorescence. Based on this bifunctional Ni-MOF nanozyme, the proposed label-free fluorescence sensing strategy was applied to detecting H 2 O 2 and glucose with wide linear ranges of 0.1–20 mM and 8–30 μM, and low detection limits of 4.0 × 10 −5 M and 4.0 × 10 −6 M, respectively. Furthermore, the bifunctional Ni-MOF-based label-free sensing platform was successfully used for the glucose detection in human serum samples, showing good reproducibility and high accuracy. This strategy provides a green and sensitive method for the determination of small biomolecules in practical applications by the combination of enzyme cascade reaction. Graphical abstract
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Water
·
2022
·Vol. 14
·期 14
·2201
·
IF 3.53
Junsuo Li,Shoucheng Ma,Xinying Li,Wei Wei
Dissolved organic matter (DOM) has been widely reported to influence the environmental behavior of microplastics (MPs), but little is known about the properties and mechanisms of interaction between specific DOM components and MPs. Here, we studied the adsorption of three representative DOM components (humic acid, HA; fulvic acid, FA; and tannic acid, TA) on polystyrene (PS) MPs in batch adsorption experiments. Results revealed that HA/FA adsorption was greater under acidic conditions, while higher TA adsorption on PS was found at pH 4 and 6. The divalent cation (Ca2+) exerted a more prominent role in enhancing HA, FA, and TA adsorption on PS than did monovalent ones (K+and Na+). The adsorption process fitted well with the Freundlich isotherm model and the pseudo-second-order kinetics model. The adsorption site heterogeneity was evaluated using the site energy distribution analysis based on the Freundlich model. The greater binding ability of HA on the PS surface caused a more negatively charged surface than FA/TA, as reflected by Zeta potential values. The findings of this study not only provide valuable information about the adsorption behavior and interaction processes of various DOM components on PS MPs, but also aid our efforts to evaluate the environmental behaviors of MPs.Keywords:microplastics;dissolved organic matter;adsorption mechanism;site energy distribution
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CHEMOSPHERE
·
2022
·
IF 8.943
Junsuo Li,Xinying Li,Shoucheng Ma,Wei Zhao,Wenming Xie,Jianqing Ma,Yijun Yao,Wei Wei
Microplastics (MPs) can act as vectors for various contaminants in the aquatic environment. Although some research has investigated the adsorption characteristics and influencing factors of metals/organic molecules on MPs, the effects of dissolved organic matter (DOM) (which are ubiquitous active species in ecosystems) on metal oxyanions such as Cr(VI) capture by MPs are largely unknown. This study explored the adsorption behaviors and mechanisms of Cr(VI) oxyanions onto polystyrene (PS) MPs using batch adsorption experiments and multiple spectroscopic methods. The effects of representative DOM components (i.e., humic acid (HA), fulvic acid (FA) and tannic acid (TA)) on Cr(VI) capture by PS were particularly studied. Results revealed a significantly enhanced adsorption of Cr(VI) on PS in the presence of TA. The Cr(VI) adsorption capacity was increased from 2876 μg g −1 to 4259 μg g −1 and 5135 μg g −1 when the TA concentrations raised from 0 to 10 and 20 mg L −1 , respectively. Combined microscopic and spectroscopic investigations revealed that Cr(VI) was reduced to Cr(III) by TA and formed stable Cr(OH) 3 colloids on PS surfaces. Contrarily, HA and FA inhibited Cr(VI) adsorption onto PS, especially at pH > 2.0 and higher DOM concentrations, due to site competition and electrostatic repulsion. Increase in pH was found to reduce zeta potentials of MPs, resulting in inhibited Cr(VI) adsorption. The adsorbed Cr(VI) declined with increasing ionic strength, implying that outer-sphere surface complexation affected the adsorption process in the presence of DOM. These new findings improved our fundamental understanding of the fate of Cr(VI) and MPs in DOM-rich environmental matrices.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2022
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IF 9.221
Conghui Jia,Shaochi Wang,Sijie Liu,Yuechun Li,Xianghong Xie,Huilan Hu,Jing Ren,Yanli Tian,Jing Sun,Daohong Zhang,Mingqiang Zhu,Jianlong Wang,Yining He
Immunochromatographic test strips (ITSs) have gained great practicability in point-of-care testing (POCT). Developing novel labels of ITSs with an additional signal to carry out quantitative analysis favors the development of sensitive POCT. Herein, tannic acid (TA) assisted stripping WS 2 nanosheets (TA-WS 2 NSs) based on colorimetric/photothermal ITS (TWITS) for clenbuterol (CLE) monitoring. After WS 2 NSs loaded TA, it retained excellent photothermal performance and an intact surface structure for monoclonal antibody (mAb) labeling, at the same time, the stability of WS 2 NSs and the activity of mAb were improved effectively. Satisfactory, the visual limit of detection (vLOD) of the photothermal signal was 0.3 ng/mL, which was enhanced 7-fold at least compared with traditional gold-based nanoparticles ITS (GNPs ITS). Importantly, this work can offer a new referenced method for other small molecule pollutants.
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