ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 11
·2312654
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IF 19
Henghan Dai,Jin Chang,Jia Yang,Huifang Wang,Jinyuan Zhou,Gengzhi Sun
High-performance fibrous materials urgently desired for fabricating energy storage devices to power wearable textile electronics are expected excellent mechanical properties, improved output capacitance, and rapid charge/discharge capability; nevertheless, their contradictory requirements in material design impose immense challenges. Inspired by the robust structure of higher plants that evolve over millions of years, herein, an interfacial engineering strategy is proposed for synergizing the mechanical strength and electrochemical performance of Ti 3 C 2 T X MXene fibers by selecting aramid (Kevlar) nanofibers and borate ions (B) as the enhancers. The intercalation of Kevlar nanofibers endows the nascent wet-spun MXene gel fibers with a high stretchable ratio through physical interaction (hydrogen bonds), greatly aligning the orientation of MXene nanosheets. B-cross-links introduce covalent bonds between MXene nanosheets, which together with hydrogen bonds significantly enhance fiber strength. More importantly, optimal ion transport kinetics is achieved by synergizing the inverse impacts of Kevlar nanofibers and B-cross-link on interlayer spacing, guaranteeing excellent electrochemical performances. Benefiting from their excellent mechanical, electrical, and electrochemical performances, borate (B)-cross-linked MXene/Kevlar fibers (MKB) are simultaneously adopted as fibrous electrodes and receiving antennae for asymmetric supercapacitors with wireless charging functions. The proposed strategy provides an avenue for designing high-performance functional fibers for future wearable applications.
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 44
·10678-10691
·
IF 7
Guanghui Liu,Hongfa Wang,Chunyan Xu,Qunling Fang,Hailong Wang,Yunqi Xu,Min Sang,Shouhu Xuan,Lingyun Hao
With the rapid development of social industrialization, environmental problems seriously threaten people's health, especially water pollution. Therefore, there is an urgent need to construct a multifunctional nanoplatform for different scenarios. Two-dimensional MXene@AgAu@PDA nanosheets loaded with AgAu bimetallic nanocages have been prepared by a one-step method. First, the in situ generated MXene@Ag is used as an auxiliary template, and then HAuCl4 and dopamine are added for in situ redox-oxidizing polymerization reactions to obtain AgAu catalytic nanocages and the protective polydopamine (PDA) layer which can improve the stability and biocompatibility. MXene and PDA have excellent photothermal conversion ability while hollow AgAu nanocages have strong absorption in the near-infrared region and a local surface plasmonic resonance effect. In comparison to the catalytic reaction rates under dark and room temperature conditions, the catalytic kinetic rate of MXene@AgAu@PDA nanosheets under near-infrared irradiation increases from 0.13 to 0.69 min−1 mg−1. Density functional theory (DFT) is used to study the electron transfer behavior between AgAu nanocages and MXene nanosheets, and the mechanism of the enhanced catalytic reaction rate is analyzed. Besides, due to its Ag ions and photothermal coupling antibacterial properties, 40 μg mL−1 MXene@AgAu@PDA nanosheets inactivates nearly all E. coli and S. aureus after irradiation with near-infrared light for 6 min.
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PubMed
高影响因子
Acta Pharmaceutica Sinica B
·
2023
·
IF 14.5
Yani Xu,Lan Yang,Min Li,Haozhou Shu,Na Jia,Yunzhen Gao,Rongying Shi,Xiaojia Yang,Zhirong Zhang,Ling Zhang
Osteosarcoma is usually resistant to immunotherapy and, thus primarily relies on surgical resection and high-dosage chemotherapy. Unfortunately, less invasive or toxic therapies such as photothermal therapy (PTT) and chemodynamic therapy (CDT) generally failed to show satisfactory outcomes. Adequate multimodal therapies with proper safety profiles may provide better solutions for osteosarcoma. Herein, a simple nanocomposite that synergistically combines CDT, PTT, and chemotherapy for osteosarcoma treatment was fabricated. In this composite, small 2D NiFe-LDH flakes were processed into 3D hollow nanospheres via template methods to encapsulate 5-Fluorouracil (5-FU) with high loading capacity. The nanospheres were then adsorbed onto larger 2D Ti 3 C 2 MXene monolayers and finally shielded by bovine serum albumin (BSA) to form 5-FU@NiFe-LDH/Ti 3 C 2 /BSA nanoplatforms (5NiTiB). Both in vitro and in vivo data demonstrated that the 5-FU induced chemotherapy, NiFe-LDH driven chemodynamic effects, and MXene-based photothermal killing collectively exhibited a synergistic “all-in-one” anti-tumor effect. 5NiTiB improved tumor suppression rate from <5 % by 5-FU alone to ∼80.1 %. This nanotherapeutic platform achieved higher therapeutic efficacy with a lower agent dose, thereby minimizing side effects. Moreover, the composite is simple to produce, enabling the fine-tuning of dosages to suit different requirements. Thus, the platform is versatile and efficient, with potential for further development.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ran Chang,Peng Hao,Hongqiang Qu,Jianzhong Xu,Jing Ma
Flexible films with thermal management capability and efficient electromagnetic interference (EMI) shielding performance are highly needed for electronic devices. Moreover, it remains difficult to integrate fire safety performance into the multifunctional film. Thus, a facile multi-interfacial engineering strategy was proposed to prepare a fire resistant MXene-based flexible film with excellent Joule heating and EMI Shielding performance. Specifically, the neighboring and interlayer MXene sheets were respectively bridged by graphene oxide and carbon nanotube via multiple physical and chemical interactions, thus formed a optimized hierarchical microstructure. The resultant film possessesd outstanding Joule heating performance including wide electrical-to-thermal temperature and sensitive conversion ability. Simultaneously, the film exhibited high EMI shielding efficiency (99.97%). Most significantly, after being burned up to 60 min, the film still maintained its flexibility and multifunctional perfprmance benefiting from a large expanded protective layer. The excellent fire resistance and multi-functions endowed the film wide application prospects in advanced electronics.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 22
·12467-12479
·
IF 4.4
Pan Weihao,Zhou Qiankun,Yang Wenjie,Nie Shibin,Xu Liangji,Wei Chunxiang,Lu Hongdian,Yang Wei,Yuen Anthony Chun Yin
Acrylonitrile–butadiene–styrene (ABS) composites with less smoke and toxicity hazards (e.g., HCN and NO x ) emission are highly demanded. As a common smoke suppressant, zinc hydroxystannate (ZHS) has been used in various polymers, while the high content, special cube shape and agglomeration restrict its development. To solve these problems, MXene (Ti 3 C 2 T x ) nanosheets were utilized to wrap ZHS nanoparticles (Ti 3 C 2 T x -PDA-ZHS) to improve the dispersion and compatibility of ZHS nanoparticles in ABS, in which polydopamine (PDA) was used as a binder to combine ZHS and MXene nanosheets. Accordingly, the prepared ABS/Ti 3 C 2 T x -PDA-ZHS nanocomposites showed the enhanced properties: (1) ABS/Ti 3 C 2 T x -PDA-ZHS exhibited a 69.7% increase in elongation at break compared to ABS/ZHS at a 2 mass% loading. (2) Owing to the synergistic effect of MXene and ZHS, Ti 3 C 2 T x -PDA-ZHS provided excellent inhibition on heat and toxic gas release during combustion (a reduction of approximately 17.5%, 34.5%, 19.1% and 20.0% of peak heat release rate, HCN, NO and NO 2 , respectively). (3) The smoke density decreased from 525.6 for neat ABS to 423.2 for ABS/Ti 3 C 2 T x -PDA-ZHS with a reduction of 19.5%, and the light transmittance of ABS/Ti 3 C 2 T x -PDA-ZHS (37.7%) was much higher than that of pure ABS (21.2%) at 240 s. Therefore, Ti 3 C 2 T x -PDA-ZHS showed a great enhancement in flammability, toxicity and smoke release reduction of ABS, potentially overcoming the weakness with improved diversity in future applications. Graphical abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiaxuan Zhou,Lijuan Yang,Xiaoyin Cao,Yingjiao Ma,Hanxue Sun,Jiyan Li,Zhaoqi Zhu,Rui Jiao,Weidong Liang,An Li
The inevitable intermittency of solar illumination during the interfacial evaporation process can cause a reduction in the evaporation performance of solar evaporators. Here, we report the fabrication of a new solar-driven interfacial evaporator using MXene nanosheets as the photothermal layer, modifying them with conjugated microporous polymer hollow microspheres , and then compounding them with the phase change material , in this case, cetyl alcohol, to form a composite evaporator (CE) that can perform all-weather solar interfacial evaporation. By combining interfacial evaporation photothermal conversion with energy storage, the evaporator achieves an evaporation rate of 1.57 kg⋅m −2 ⋅h −1 at a light intensity of 1 kW⋅m −2 and 2.79 kg⋅m −2 ⋅h −1 at a light intensity of 2 kW⋅m −2 . In addition, the evaporator attains an excellent solar evaporation efficiency of over 91% in both cases and even in salt water. In addition, interestingly, our CE exhibits excellent continuous evaporation ability, e.g., the mass of evaporated water was increased by 0.36 kg⋅m −2 at a light intensity of 2 kW⋅m −2 compared to the cavity evaporator without the phase change material (PCM) when solar light was turned off. These results could be attributed to the fact that the energy released by the incorporated phase change material allows the evaporator to maintain stable evaporation under conditions of insufficient or intermittent solar irradiation, potentially providing a new opportunity for addressing the intermittent problem of evaporation at the solar interface due to unstable light intensity, thus showing great potential for practical continuous desalination .
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Jingxuan Cui,Jiao Wu,Le Mi,Aihu Feng,Yang Yu,Yun Yu
Ti3C2Tx MXene is expected to achieve infrared stealth by regulating its thermal radiation properties. In this study, Ti3C2Tx MXene films were prepared by using the acid etching method, and the effects of etchants (HCl/LiF, HF, and NH4HF2) on the film structure as well as the infrared radiation properties were systematically studied. The intercalation process used to exfoliate single/few-layer nanosheets was found to accelerate the oxidation and increase the resistance of MXene. The mechanism behind these effects on emissivity was explained in detail. Based on these findings, the most suitable preparation process for low-emissivity MXene was selected. The resulting Ti3C2Tx film (HL-f), which used HCl/LiF as an etchant for Ti3AlC2, has a high conductivity of 3119 S/cm that reflects numerous infrared waves reaching its surface while exhibiting a low emissivity of only 0.13. The colloidal solution (HL-s) made with HCl/LiF as an etchant was sprayed directly onto a PI substrate as a coating with infrared stealth capabilities, thermal stability, and Joule heating properties, reducing the emissivity from 0.87 to 0.14. This work provides guidance for improving MXene preparation methods and their applications in related fields while demonstrating the great potential of HCl/LiF-etched Ti3C2Tx MXene as a low-emissivity infrared stealth material.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Shang-yu Chen,Yu-fan Deng,Ting Huang,Nan Zhang,Yong Wang
As an eco-friendly material, the wide application of polylactide (PLA) in wastewater treatment is favorable for eliminating the possible second-pollution induced by the common membrane materials. However, the application of PLA is also greatly restricted by the hydrophobicity and inert surface of PLA-based materials. In this work, the electrospun PLA fiber film with stereocomplex crystallites (SC-PLA) was prepared through electrospinning, then the successive decorations of self-polymerization of polydopamine (PDA) and PDA-assisted MXene deposition were carried out. The physicochemical performances such as wettability, mechanical properties, and photothermal conversion ability were intensively researched. Then, the oil/water separation ability and the organic pollutants removal effect of the composite membranes were systematically researched. The results show that the composite membrane is amphiphilic, which results in the membrane exhibiting high fluxes and excellent oil/water separation performance in the separation process of different types of emulsions, and oil/water separation efficiency can be further enhanced under light irradiation. Specifically, the maximum adsorption capacity of the composite membrane for methylene blue (MB) reached 434.8 mg/g, and the composite membrane can also simultaneously remove oil and MB from the emulsified solution in the one-time separation process. This work demonstrates that the PLA-based composite membranes have potential application in sewage purification and can be the alternative for the next generation membrane separation material.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yulian Yang,Qiuyi Liu,Yuemeng Zou,Meng Tian,Luchun Wang,Lingling Li,Mingyue Wang,Yongqing Tao,Junji Wang,Zeng Wen,Famin Ke,Dandan Wang,Die Gao
Widespread use of fluoroquinolones (FQs) leads to its continuous excretion and release into the environment, resulting in the accumulation in water, animal-derived food etc., and posing a threat to environment and humans. Thus, the development of highly efficient FQs removal methods is of great significance. Herein, a composite (COF@MXene) was manufactured using a covalent assembly synthesis strategy by connecting covalent organic frameworks (COF) and NH 2 -MXene through a Schiff-base reaction. COF@MXene had the advantages of both COF and MXene, not only had good crystallinity , thermal stability and rich functional group properties, but also had high protein exclusion ability (Exclusion efficiency>97%) and good adsorption capacities for FQs including ciprofloxacin (CIP), lomefloxacin (LOM), moxifloxacin (MOX), gatifloxacin (GAT) and levofloxacin (LEV). The maximal adsorption capacities for them ranged from 54.63 to 147.91 mg·g −1 , which were higher than those of COF (15.99–64.06 mg·g −1 ) and MXene (27.58–33.92 mg·g −1 ). The adsorption experimental data of adsorption isotherm and kinetics separately followed the Langmuir and pseudo-second-order models. Through density functional theory (DFT), Forcite calculation, UV-Vis and XPS analyses, pore size selectivity , electrostatic and hydrogen bond interactions were determined as the main driving forces for FQs adsorption. Finally, COF@MXene coupled with HPLC-DAD was employed for the analysis of FQs from water, egg and drug samples, and the recoveries were satisfactory. This work reported a covalent assembly synthesis strategy for the preparation of COF@MXene composite for FQs removal. This approach may establish a viable route for gentle fabrication of COF and MXene based composites for various applications.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Ming-Ke Xu,Ji Liu,Hao-Bin Zhang,Yu Zhang,Xinyu Wu,Zhiming Deng,Zhong-Zhen Yu
Electrically conductive polymer nanocomposites are highly required for efficient electromagnetic interference (EMI) shielding applications. Although two-dimensional transition metal carbide/carbonitride (MXene) nanosheets with metallic electrical conductivity and layered structure show great potential for the construction of interconnected conductance networks in polymer matrices, their preferred stacking feature and intrinsic hydrophilicity inevitably cause poor dispersion in organic polymers, making it challenging to prepare MXene/polymer nanocomposites with high electrical conductivity and satisfactory EMI shielding performances at low MXene contents. Herein, we demonstrate an efficient methodology to prepare highly conductive MXene/polypropylene (PP) nanocomposites with an ultralow percolation threshold for efficient EMI shielding application. By dip-coating MXene nanosheets onto a polyethyleneimine-grafted PP textile, followed by vacuum-assisted compression molding, an interconnected conductance network of MXene nanosheets in the PP matrix is constructed facilely and efficiently. The resultant MXene/PP nanocomposite exhibits an ultralow percolation threshold of 0.027 vol %, a high electrical conductivity of 437.5 S m–1 at a low MXene loading of 2.12 vol %, and an outstanding EMI shielding performance of more than 60 dB within the X-band, superior to most other electrically conductive polymer nanocomposites. This work provides a new approach for fabricating MXene/polymer nanocomposites with outstanding electrical conductivity for high-performance EMI shielding applications.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yanting Wang,Hao-Kai Peng,Ting-Ting Li,Bing-Chiuan Shiu,Hai-Tao Ren,Xuefei Zhang,Ching-Wen Lou,Jia-Horng Lin
With the expanding utilization and development electronic devices, electromagnetic interference (EMI) shielding materials with good flexibility and lightweight have been desired to eliminate the radiation pollution. However, many EMI shielding materials are usually limited in practical application due to the large thickness and poor mechanical properties. Herein, ultra-thin and lightweight conductive composite films with both unique undulating layered structure and sandwich structure were constructed via a simple solution dip-coating method. The PAN@TiO 2 (PT) film as a substrate endowed the Ti 3 C 2 Tx film a certain strength, the polydopamine was decorated on the PT film surface to enhance the combination fastness of the PT film and Ti 3 C 2 Tx, and the Ti 3 C 2 Tx sheets built a conductive network. The conductive composite film (high tensile strength of 93.55 MPa) possessed an average EMI shielding effectiveness (SE) of 32 dB and a specific SE of 4085.92 dB cm 2 /g owing to their excellent electrical conductivity of 92.68 S/cm. The bio-inspired strategy provides a promising approach in fabricating flexible and ultrathin composite materials for highly efficient EMI shielding applications. Furthermore, this strategy offers a feasible idea for preparing multifunctional films.
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Advanced Composites and Hybrid Materials
·
2021
·Vol. 4
·期 2
·274-285
·
IF 5.693
Gao Qingsen,Pan Yamin,Zheng Guoqiang,Liu Chuntai,Shen Changyu,Liu Xianhu
The prosperous development of smart wearable electronic devices has caused extensive demand for flexible composite films with integrated electromagnetic interference (EMI) shielding and thermal management performances. However, it is still a challenge to prepare flexible composite films with desirable properties. Herein, the flexible multilayered MXene/thermoplastic polyurethane films were prepared via a simple layer-by-layer spraying technique. The multilayered films with 28.6 wt% MXene and 52-µm thickness exhibit high electrical conductivity of 1600 S/m, excellent EMI shielding effectiveness of 50.7 dB in the X-band, and outstanding specific shielding effectiveness of 7276 dB.cm 2 g −1 . Meanwhile, a high in-plane thermal conductivity of 6.31 W/(m.k) and low cross-plane thermal conductivity of 0.42 W/(m.k) were obtained. Besides, the obtained films exhibit excellent Joule heating performance (113 °C) with low voltage (5 V), fast response time (< 10 s), excellent heating stability, and efficient de-icing as well as potential thermal stealth performance. Graphical abstract The multilayered MXene/TPU films were prepared by layer-by-layer spraying and exhibited excellent EMI shielding, thermal conductivity, and management performances.
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