JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2023
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IF 2.2
Jun Luo,Jia Liu,Haiyan Yao,Zhihua Li,Junchao Wei
As an important inorganic antibacterial nanomaterial, zinc oxide nanoparticles (ZnO NPs) have been widely used in biomedical fields. However, the poor dispersion and potential toxicity greatly limit its application. Surface modification is an effective method to improve the dispersion and biocompatibility of ZnO NPs. In this work, ε-polylysine (ε-PL) was grafted on the surface of ZnO NPs via the combination of mussel inspired method and “Michael addition” reaction. The results showed that the ε-PL grafted ZnO (ZnO@ε-PL) could disperse stably in water more than 72 h, demonstrating ε-PL greatly improves the dispersion of ZnO NPs. Furthermore, the cells viability of ZnO@ε-PL at high concentrations (500 μg/mL) was 143.05 ± 12.63%, indicating that the biocompatibility of ZnO@ε-PL is much better than that of ZnO NPs. This study proposed a feasible and effective strategy to improve the dispersion and biocompatibility of ZnO NPs, which may expand the application of ZnO NPs in the biological field.
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Journal of Physical Chemistry C
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2023
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IF 3.7
Pengfei Jiang,Ji Mi,Chongkun Shao,Yitong Dai,Shu Yan,Yongsheng Guo,Wenjun Fang
In this study, palmitoyl and hindered phenolic hyperbranched polyglycerol (CBHPG), with hyperbranched polyglycerol (HPG) as the structural core and hindered phenol or alkyl chain as the decorated shell, has been strategically designed and synthesized as an efficient integrated additive to enhance the energy efficiency and inhibit the oxidation coking of hydrocarbon fuels. The superior thermal stability and solubility of CBHPG were confirmed by thermal gravimetric analysis and dynamic light scattering. In the presence of CBHPG with high antioxidant activity, the oxidation induction time of n-undecane increased more than 2-fold at 170 °C. In deposition tests, the amphiphilic macromolecule CBHPG showed excellent performance with 58% oxidation coking inhibition rate of Chinese Jet Fuel (RP-3). The Jet Fuel Thermal Oxidation Stability test at 355 °C also exhibited that CBHPG could greatly reduce the deposit of RP-3 by decreasing the deposit rating from >4 to <1. In cracking experiments, the addition of 0.1 wt % CBHPG with sufficient polymerization could increase the conversion of n-undecane by 17.6%, with the corresponding heat sink by 6.1% at 675 °C. The above results indicated that CBHPG could efficiently enhance the performance of hydrocarbon fuels due to multipurposes in antioxidation, coking inhibition, and cracking promotion. CBHPG with a strategically designed structure as an integrated additive shows great promise in improving the energy efficiency and safety in future advanced aircraft.
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POLYMERS FOR ADVANCED TECHNOLOGIES
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2023
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IF 3.4
Qian-Ru Xiao,Si Sun
Animal oils would not only pollute the water but also block the sewer. Using hydrophilic membrane is an effective approach for oil/water separation. However, abrasion would cause the damage of the membrane and shorten their service life. In this work, we prepared a sandwich structured oil/water separation membrane (SSM) with two layers of cotton fabric and a core layer of PAM modified stainless-steel mesh via a cost-effective and facile process. The as-prepared membrane can selectively separate water from oil/water mixtures with high efficiency, high flux (beyond 6000 L m −2 h −1 ), and good reusability. Moreover, as compared with hydrogel coated mesh, the SSM exhibited good abrasion resistance, which would effectively improve the usability in real scenarios. More importantly, the SSM has successfully blocked the oil in a simulated sewer and a real sewer in the kitchen, which will help prevent sewer blockage.
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Molecular Catalysis
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2023
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IF 4.6
Xi Zhang,Lingling Ren,Liang Sun,Zhuobin Huo,Bangjie Tan,Nengjie Feng,Hui Wan,Guofeng Guan
Manganese oxides were received extensive attention on account of its low cost, variable valence state and excellent redox properties. Herein, we successfully prepared various Fe-doped MnO 2 catalysts to further improve the catalytic activity of MnO 2 on propane. Physicochemical characterization results displayed that with the increase of Fe doping amounts, the crystalline phase of MnO 2 gradually changed from α-MnO 2 and β-MnO 2 to Fe 2 O 3 , the particle size of catalysts decreased and the specific surface area increased. However, increasing the content of Fe could not monotonically enhance the catalytic performance of catalysts on propane. When the molar ratio of Fe/Mn was 0.25, the largest amount of Mn 4+ species and lattice oxygen species were exposed on the surface of Mn8Fe2, and showed the best low temperature reducibility , which was ascribed to the synergistic effect between Mn and Fe was enhanced. It presented optimal catalytic activity for propane oxidation with temperature of propane conversion at 90% (T 90 ) as low as 279 °C under 0.1% propane and 5% O 2 . This work provided a new way to design and synthesize efficient non-noble metal catalysts for the elimination of propane, which had certain application value.
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Food Analytical Methods
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2023
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IF 2.9
Qiao Fanglin,Chen Yin,Fei Yunjie,Jiang Yanjun,Xiong Xiaohui,Liu Yuanjian
Due to the complex characteristics of food matrix, false positives may occur when using traditional methods to detect aflatoxin B1 (AFB1). In this paper, we utilize the advantages of closed bipolar electrode (BPE) that can effectively avoid the impact of complex food matrices on signal collection, and design a biosensor based on immune competition to detect highly toxic AFB1. The biosensor uses cathode of closed BPE as a functional sensing interface and anode as a signal collection interface. On the functional sensing interface, AFB1 connects to the monoclonal antibody at the top of DNA tetrahedron structure. Under the action of horseradish peroxidase (HRP), 4-chloro-1-naphthol (4-CN) is catalyzed by hydrogen peroxide (H 2 O 2 ) to generate precipitations (4-CD). AFB1 competes with HRP-AFB1 to bind monoclonal antibody, resulting in a decrease in the content of HRP involved in catalytic oxidation reactions and a synchronous reduction in precipitations produced, causing an increase in the intensity of [Ru(bpy) 3 ] 2+ /TPA system electrochemiluminescence (ECL) on the BPE anode. Analysis shows that the relative deviation between the detection results and ELISA is between −4.5 and 9.8%, and there is no significant difference in the performance of the two in detecting AFB1. The BPE-ECL sensor exhibits high sensitivity and specificity in detecting AFB1, with a linear range of 0.01–40 ng mL −1 and a detection limit of 3 pg mL −1 . In the future, it can be applied to the detection of other toxins, with broad application prospects.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Gaosheng Li,Yujiao Gao,Chenyu Sun,Fukun Niu,Zhuqun Shi,Quanling Yang,Chuanxi Xiong
Flexible sensors based on biological hydrogels have gained significant attention in the fields of wearable devices , human-computer interaction robots, and medical monitoring. Nanocellulose , a natural polymer material, offers advantages such as low cost, abundant reserves, green environmental protection, and renewability. However, the high water content of the nanocellulose-based flexible sensor limits its application at low temperatures, making it difficult for the nanocellulose-based hydrogel electronic skin to function properly. To enhance the hydrogel's anti-freezing and anti-drying properties, we introduced glycerol (GL) into the in-situ grown polypyrrole (PPy) hydrogel of 2,2,6,6-Tetramethylpiperidine-1-oxyl radical (TEMPO) oxidized cellulose nanofibril (TOCN) and obtained the organic hydrogel TOCN/PPy/GL. The prepared TOCN/PPy/GL organic hydrogel maintains excellent electrical conductivity , mechanical properties , and strain sensing capabilities (strain sensitivity GF=2.41 at −45 ℃, response time 100 ms, recovery time 200 ms). The TOCN/PPy/GL organic hydrogel electronic skin also exhibited exceptional anti-drying property, with a volume retention of 66.75% after 24 h at 100 ℃, which is six times higher than the volume retention of TOCN/PPy hydrogel without GL under the same conditions.
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POLYMER COMPOSITES
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2023
·Vol. 44
·期 11
·7865-7875
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IF 5.2
Xue Jia,Boyu Cui,Shuang Li,Hao Xie,Weihong Wang,Yutong Cui,Jiayan Ding,Xianquan Zhang,Yongming Song
Microcrystalline cellulose (MCC) fibers are co mmonly used to reinforce polymers; however, their freeze-drying process consumes a lot of energy. In this study, MCC dried at different temperatures, oven-dried at 25, 50, 75, and 103°C and freeze-dried, was evaluated based on their effect on the reinforced composites. The dried MCC was compounded with polylactic acid (PLA) by melt extrusion and compressed into an MCC/PLA composite film. The morphology, structure, and crystallinity of the dried MCCs and MCC/PLA composites were analyzed using scanning electron microscopy, laser particle size analysis, x-ray diffraction, mechanical testing, and Fourier transform infrared spectroscopy. It was proved that MCC dried at 103°C was more uniformly dispersed and tightly bound to the PLA matrix than freeze-dried MCC. Tensile measurements showed that the MCC dried at 103°C had nearly the same tensile strength (58.35 MPa) as that of the freeze-dried MCC (58.7 MPa) and was higher than that of the other oven-dried MCC. Energy consumption evaluation revealed that oven-drying consumed much less energy than freeze-drying MCC for 24 h to obtain the same final moisture content. MCC dried at 103°C has significantly better properties than MCC dried at 25, 50, and 75°C, similar to freeze-drying. Concerning performance and energy consumption, drying at 103°C is determined the optimal choice to support the preparation of MCC-reinforced PLA composites. Highlights Drying temperature effects aggregation of MCC. MCC Dried at 103°C can present similar properties to freeze-dried MCC but save more energy. Oven-drying can be a good way to dry MCC for the preparation of MCC/PLA composite.
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CERAMICS INTERNATIONAL
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2023
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IF 5.2
Hongping Hou,Amei Zhang,Huan Yang,Na Liao,Shailendra Rajput,Hongliang Du,Chunchun Li
A low permittivity microwave dielectric ceramic, Li-containing silicate (LiGaSiO 4 ), was synthesized using the standard solid-state reaction method. The nominal LiGaSiO 4 ceramic exhibited a relative permittivity of approximately 4.4. The effects of nonstoichiometric Li on the microstructure, sintering behavior, and microwave dielectric properties of LiGaSiO 4 were comprehensively investigated. Excess Li content (6 mol%) significantly improved the relative density (96.1 %) and microwave dielectric properties ( ε r ∼5.34, Q × f ∼55,600 GHz, and τ f ∼ -48.6 ppm/°C), while reducing the optimum sintering temperature from 1070 °C to ∼1010 °C. Additionally, the incorporation of 2 wt% LiF further reduced densification temperature (∼940 °C). The regulation of the τ f was achieved through the addition of CaTiO 3 ceramic, and a patch antenna was designed and fabricated using a modified Li 1.06 GaSiO 4 -LiF-CaTiO 3 composite ceramic. The resulting patch antenna resonates at 5.87 GHz with an impressive bandwidth of 83.1 MHz, while both simulated and measured results demonstrate excellent agreement.
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THERMOCHIMICA ACTA
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2023
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IF 3.5
Huang Qian,Xia Hongde,Wei Kai
The tangent method, which is an international standard for analysis of critical state of reaction, is a mathematical method and containing no physical connotations of critical characteristics. Critical moments of reactions were analyzed in the present work and their corresponding temperatures were determined using analysis theory of stoichiometric window function method and stoichiometric relation of reaction based on reaction process λ, which is a characteristic parameter of reactions. The method is based on the qualitative and quantitative mass spectrometric analysis of gaseous substance of the reaction process, the molar yield of the material is used as the basis for calculation. The theoretical analysis by stoichiometric window function method is consistent with experimental results.
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Nano Research
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2023
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IF 9.9
Wu Mengjun,Song Jiangping,Lei Jiaheng,Tang Haolin
Composite polymer electrolytes (CPEs) have attracted much attention for high energy density solid-state lithium-metal batteries owing to their flexibility, low cost, and easy scale-up. However, the unstable Li/CPE interface is always challengeable for the practical utilization of CPEs. Herein, a polymer interlayer containing K + prepared by ultraviolet (UV)-curing precursor solution is coated on Li surface to stabilize the interface between poly(vinylidene difluoride) (PVDF) composite electrolytes and Li anode. Benefiting from the physical barrier of the interlayer, the continuous decomposition of PVDF is restrained and the intimate contact between electrode and electrolyte is also achieved to reduce the interface impedance. Moreover, the added K + is utilized to further regulate smooth Li deposition. As a consequence, the symmetric Li∣Li cell with coated Li demonstrates steady cycling at 0.4 mAh·cm −2 and a high critical current density of 1 mA·cm −2 . The assembled Li∣LiFePO 4 cell presents outstanding cycling stability (capacity retention of 90% after 400 cycles at 1 C) and good rate performance. The associated pouch cell performs impressive flexibility and safety. This work provides a convenient strategy to achieve stable Li/PVDF interface for high-performance PVDF-based solid state Li metal batteries.
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ANALYTICAL BIOCHEMISTRY
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2023
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IF 2.9
Zhangmin Wang,Ze Zhang,Hongzhi Pan,Dong Chang
Exosomes derived from lung cancer typically contain the genetic information of the donor cells. Therefore, exosomes contribute to early diagnosis, treatment effectiveness evaluation, and prognosis assessment of cancer. Based on the biotin-streptavidin system and MXenes nanomaterial , a dual-effect amplification method had been developed to construct an ultrasensitive colorimetric aptasensor for detecting exosomes. MXenes can enhance the loading of aptamer and biotin as the high specific surface area. Biotin-streptavidin system can increase the amount of horseradish peroxidase-linked (HRP-linked) streptavidin , considerably boosting the color signal of the aptasensor. The proposed colorimetric aptasensor exhibited excellent sensitivity, with a detection limit of 42 particles μL −1 and a linear range of 10 2 to 10 7 particles μL −1 . The constructed aptasensor showed satisfactory reproducibility, stability, and selectivity , confirming the promising application of exosomes in clinical cancer detection.
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PubMed
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JOURNAL OF APPLIED POLYMER SCIENCE
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2023
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IF 3
Yifang Zhao,Yuanyuan Liu,Mengqing Cheng,Zixian Li,Xinyu Meng,Ailing Sun,Liuhe Wei,Xingjiang Liu,Yuhan Li
Conventional adhesives often emit volatile organic compounds (VOCs), which have a negative impact on human health. In this paper, an environmentally-friendly supramolecular adhesive PD which has high adhesive and low VOCs emission is prepared by the reaction between polyethyleneimine (PEI) and 3,4-dihydroxybenzaldehyde (DBA). PD containing abundant catechol groups exhibit excellent adhesion to wood substrates and is able to reach a maximum shear strength of 5.20 ± 0.39 MPa. One factor is attributed to multiple reactions between PEI, and DBA and oxidation of DBA. These reactions construct a complex three-dimensional cross-linked structure which is very helpful to improve the bonding performance of the adhesive. Another reason refers to the fact that a large number of catechol groups in PD can form a lot of hydrogen bonds with the amino group in PEI and the hydroxyl group in the wood substrate. These hydrogen bonds play an important role in enhancing shear strength. PD adhesives have a stronger bond strength than commercial chloroprene rubber (CR, Pattex-PXL) and polyvinyl acetate adhesives (PVAc, JUJU-8708) and have lower emissions of VOCs. As an environmentally-friendly adhesive for wood-based substrates, this adhesive may have potential applications in the wood processing industry.
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