COMPOSITE STRUCTURES
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2021
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IF 5.407
Zhe Wang,Kaiming Zhang,Yuetao Liu,Haoyu Zhao,Chuanhui Gao,Yumin Wu
Polymers/nanomaterials conductive elastomers based on reversible interactions are of great significance in the application of resistive sensors because they repair themselves after mechanical injury, just like living things. The electronic devices developed with such materials will be more stable and reliable. Herein, we innovatively used ring opening polymerization (ROP) of sulfur-containing five membered rings to endow organosilicon supermolecule and MXene with hyperbranched structure which had terminal carboxyl groups. Subsequently, organosilicon conductive elastomer (PDMS@MXene) crosslinked by hydrogen bonds and metal–ligand bonds was prepared. The fully disconnected PDMS@MXene could recover 91.7% of its original mechanical properties after spontaneous repair. The well-organized composite had high stretchability and excellent tensile strength , which enhanced its application prospects in soft robots , motion monitoring and other fields. This novel design idea and simple preparation process will provide a reference for the development of self-healable conductive elastomer in the future.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Tao Zhang,Xin Guo,Brusly Solomon,Mohsen Sharifpur,Li-Zhi Zhang
Hollow fiber membrane-based humidification-dehumidification desalination of seawater is a low-carbon freshwater-harvesting technology that can be powered by low-grade solar energy. Polyvinylidene fluoride (PVDF) can be easily fabricated into membranes and is considered the most promising material for industrial seawater desalination. However, membrane fouling and wetting have always been major obstacles with this technology. In this study, a hydrophobic-hydrophilic MXene/PVDF composite hollow fiber membrane (PVDF-MP) with remarkable antiwetting and antifouling properties was successfully prepared using a chemical grafting method. The interfacial dehydration reaction between the hydrophilic substrate layer (PVDF-OH) and the hydrophobic skin layer (MXene-P [MP]) was verified by Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy, and a detailed reaction mechanism was provided. The hydrophilic substrate layer decreased moisture transfer resistance, while the hydrophobic skin layer reduced the membrane surface energy and increased the surface roughness . This resulted in a contact angle of 156.2°, which was measured using a new method that accounted for the curvature of the membrane. The superhydrophobic surface possessed a strong repulsive force toward water, and the air gap between the water and membrane impeded pollutant deposition on the inner surface of the membrane. Moreover, the rough surface created high entry pressure and prevented water from entering the membrane pores. Thus, the permeate flux of the PVDF-MP membrane persisted over 120 h during desalination tests, surpassing the performance of traditional materials.
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Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 47
·26839-26851
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IF 12.732
Chenxi Li,Xingxing Ni,Yang Lei,Shangyang Li,Lei Jin,Bo You
Benefiting from a specific multilayered structure, yolk–shell microspheres with void spaces are considered promising electromagnetic shielding materials which do well in enhancing the decay of electromagnetic waves. Commonly reported synthesis methods of yolk–shell nanostructures include sacrificial templates and tedious subsequential treatment. In this work, a novel, green and facile plasmolysis-inspired route was developed to fabricate uniform yolk–shell hydrogel-core@void@MXene-shell (poly(N-isopropylacrylamide)@void@polystyrene@MXene, abbreviated to PNIPAM@void@PS@Ti3C2Tx) nanocomposite microspheres. The void space between the PNIPAM core and the PS supporting layer was created on the basis of the shrinkage of the soft PNIPAM hydrogel core due to the removal of water in the hydrogel. In addition, a microsphere model was developed to predict that the void space can modulate the impedance matching to attenuate the reflection of electromagnetic waves on the surface of the microsphere and enhance the entry of electromagnetic waves. Ultrathin hydrogel-core@void@MXene-shell (PNIPAM@void@PS@Ti3C2Tx) self-supporting films could be prepared via filtration–drying of PNIPAM@PS@Ti3C2Tx nanocomposite microspheres. The 25 μm ultrathin nanocomposite film showed excellent electromagnetic interference (EMI) shielding effectiveness of 72 dB at 9.5 GHz and exhibited a wide absorption spectral range from 8.2 GHz to 12.4 GHz (>30 dB). The electromagnetic parameters of the equivalent medium model are obtained through the retrieval algorithm of the actually measured S-parameters, and models were constructed to simulate and explain the electromagnetic shielding performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Zhilin Zhao,Xinming Wu,Chunyan Luo,Yan Wang,Weixing Chen
Although electrodes based on two dimensional hybrids with interstratification-assemble have been widely studied for supercapacitors, the performance enhancement still remains challenge mainly due to the random dispersion of surface passivated two dimensional nanosheets. Herein, a new covalent surface functionalization of MXene-based Ti 3 C 2 Cl 2 nanodots-interspersed MXene@NiAl-layered double hydroxides (QD-Ti 3 C 2 Cl 2 @NiAl-LDHs) hybrid electrode with superior pseudocapacitor storage performance has been elaborately designed by electrostatic-assembled. As a result, the QD-Ti 3 C 2 Cl 2 @NiAl-LDHs electrode exhibits a super specific capacitance of 2010.8F g −1 at 1.0 A g −1 and high energy density of 100.5 Wh kg −1 at a power density of 299.8 W kg −1 . In addition, 94.1% capacitance retention is achieved after cycling for 10,000 cycles at 1.0 A g −1 , outperforming previously reported of two dimensional hybrids electrode for supercapacitor. Furthermore, density functional theory (DFT) calculations show that the superior pseudocapacitor storage performance of the QD-Ti 3 C 2 Cl 2 @NiAl-LDHs may be attributed to the creation of numerous electrochemical active sites and the enhancement of electrical conductivity by the QD-Ti 3 C 2 Cl 2 MXene. This work provides new strategy for developing excellent pseudocapacitor supercapacitor based on two dimensional hybrid electrode.
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PubMed
高影响因子
Small
·
2021
·Vol. 18
·期 5
·2104368
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IF 13.281
Xin Yang,Changqing Zhang,Dawei Deng,Yueqing Gu,Huan Wang,Qifeng Zhong
Chronic wound healing is an important and basic issue in medical and healthcare fields. Recently, stimuli-responsive hydrogel systems have emerged as promising drug delivery carriers for wound management. However, given to the limited therapeutic outcomes, new hydrogel systems for efficient wound treatment are urgently needed. Here, the development of a 2D MXene-based hydrogel system for highly efficient photo- and magnetic-responsive drug delivery oriented to deep chronic wounds repair is presented. The intelligent responsive MXene-based hydrogel drug delivery system is composed of MXene-wrapped magnetic colloids and poly( N -isopropyl acrylamide)-alginate dual-network hydrogels. It is demonstrated that the MXene-based hydrogel system exhibits multiple response capability and controllable drug delivery ability, which can reduce the toxic side effects of drugs and promote the wound healing process as well. Notably, the practical performance of the MXene-based hydrogel drug delivery system is demonstrated by applying it to the treatment of the full-thickness cutaneous wound and subcutaneous infected wound of the rat model, which indicates the great prospect in clinical wound healing and other related biomedical fields.
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PubMed
高影响因子
Polymers
·
2021
·Vol. 13
·期 21
·3815
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IF 4.329
Wanxin Peng,Furui Sun,Yuke Liang,Jian Kang,Jinyao Chen,Wei Wang,Ya Cao,Ming Xiang
In this study, one of the commonly used MXene (Ti3C2Tx) and β nucleated isotactic polypropylene (β-iPP)/MXene composites of different compositions were fabricated. The effects of MXene on non-isothermal crystallization and polymorphic behavior of β-iPP/MXene composites were comparatively studied. The non-isothermal crystallization kinetics indicates that for all samples, the lower cooling rates promote composites to crystallize at higher temperatures. When MXene and β-Nucleating agent (β-NA) are added separately, the crystallization temperature of composites shifts towards higher temperatures at all cooling rates. When MXene and β-NA are added simultaneously, the composite shows different cooling rate dependence, and the effects of improving crystallization temperatures is more obvious under rapid cooling. The activation energy of four samples iPP, iPP/MXene, iPP/β-NA, and iPP/MXene/β-NA were −167.5, −185.5, −233.8, and −218.1 kJ/mol respectively, which agree with the variation tendency of crystallization temperatures. The polymorphic behavior analysis obtained from Differential Scanning calorimetry (DSC) is affected by two factors: the ability to form β-crystals and the thermal stability of β-crystals. Because β-crystals tend to recrystallize to α-crystals below a critical temperature, to eliminate the effect of β-α recrystallization, the melting curves at end temperatures Tend= 50 °C and Tend= 100 °C are comparatively studied. The results show that more thermally unstable β-crystals would participate in β-α recrystallization with higher cooling rates. Moreover, thermal stability of β-crystals is improved by adding MXene. To further verify these findings, samples of three different thermal conditions were synthesized and analyzed by DSC, X-Ray Diffraction (XRD), and Polarized Light Optical Microscopy (PLOM), and the results were consistent with the above findings. New understandings of synthesizing β-iPP/MXene composites with adjustable morphologies and polymorphic behavior were proposed.Keywords:istotactic polypropylene;MXene;nonisothermal crystallization behavior
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高影响因子
CARBON
·
2023
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IF 10.9
Tiantian Ma,Peng Wang,Hua-Jie Niu,Zhongxuan Che,Guozheng Li,Wei Zhou
Exposing more catalytic active sites is an effective strategy to enhance the catalyst activity for hydrogen evolution reaction (HER). Herein, Ti 3 C 2 T x MXene served as a substrate to load thin and curved 2 H –MoSe 2 nanosheets by a typical hydrothermal method , forming MoSe 2 /MXene heterointerface with the fully exposed Mo edge sites. And then, atomically dispersed Ru single atoms (RuSAs) were successfully anchored on the MoSe 2 /MXene (RuSAs@MoSe 2 -MXene). The X-ray absorption near edge structure (XANES) demonstrates that Ru is loaded as single atoms on MoSe 2 and MXene . The prepared sample exhibits improved catalytic activity with a small overpotential of 49 mV at 10 mA cm −2 and a low Tafel slope of 52 mV dec −1 for HER in 0.5 M H 2 SO 4 . It also exhibits excellent stability with a small attenuation voltage of 10 mV for 120 h at 10 mA cm −2 in 0.5 M H 2 SO 4 . When assembled into a two-electrode system of RuSAs@MoSe 2 -MXene||RuO 2 , it only requires a relatively low potential of 1.626 V at 10 mA cm −2 to drive overall water splitting (OWS). Control experiments disclose the highly improved performance can be primarily attributed to the introduced RuSAs and MoSe 2 /MXene heterointerfaces exposing more active sites of Ru and Mo. Moreover, the high conductivity of MXene can increase charge transfer in HER process. The interface engineering with multiple interfaces can provide fresh impetus for the development of efficient HER catalysts.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Junhai Wang,Yu Kan,Tingting Yan,Wenfeng Liang,Lixiu Zhang,Xinran Li,Siyang Gao
Progress in nanolubricant additive is crucial to pursuit of energy saving and sustainable development. For enhancing lubrication efficiency of pentaerythritol ester (PETE) oil, we synthesized zero-dimensional/two-dimensional (0D/2D) carbon dots(CD)@Ti3C2Tx-MXene hybrid composites using a facial hydrothermal method, which gave full play to interlayer shear mechanism of Ti3C2Tx-MXene, repair effect of carbon dots and their potential synergy. The composites were added to PETE as lubricating additives, during which ultrasonic treatment was employed to enhance the dispersion stability. The frictional tests confirmed that the addition of CD@Ti3C2Tx resulted in significant reductions in friction and wear across varying temperatures owing to the ultrasmall size, interlayer sliding, and synergistic effect. The optimal concentration of 0.1 wt % of CD@Ti3C2Tx reduced friction coefficients and wear volumes of PETE by 54.5% and 57.6% at 25 °C, 53.3% and 54.3% at 100 °C, and 40.0% and 45.9% at 200 °C, respectively. A tribofilm induced by complex tribochemical reactions, mainly consisting of carbon dots, Ti3C2Tx, metal oxides, carbides, and nitrides, was generated at the contact interface, which significantly alleviated direct contact between the rubbing pair. This study explores the potential of CD@Ti3C2Tx for development of advanced lubricating materials and is expected to contribute to wider adoption of MXene-based materials in the field of tribology.
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TALANTA
·
2023
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IF 6.1
Yanmei Shi,Kai Hu,Lin Mei,Liqin Chao,Mingxia Wu,Zhihong Chen,Xiangxiang Wu,Jingyi Qiao,Pingsheng Zhu,Mingsan Miao,Sisen Zhang
The use of two-dimensional heterostructure composite as electrode modification material has become a new strategy to improve the electrocatalytic activity and electroactive sites of electrochemical sensor. Herein, a soluble heterostructure, namely rGO-PSS@MXene, was designed and synthesized by integrating poly (sodium p -styrenesulfonate)-functionalized reduced graphene oxide into MXene nanosheets via ultrasonic method. The interactive heterostructure can effectively alleviate the self-stacking of MXene and rGO, endowing them with superior electron transfer capacity and large specific surface area , thereby producing prominent synergistic electrocatalytic effect towards rutin . In addition, the excellent enrichment effect of rGO-PSS@MXene for rutin also plays an important role through the electrostatic and π-π stacking interactions. The electrochemical characteristics of rutin on the sensor were examined in detail and a sensitive sensing method was proposed. Under optimized conditions, the method showed satisfactory linear relationship for rutin in the concentration range of 0.005–10.0 μM, with limit of detection of 1.8 nM (S/N = 3). The quantitative validation results in herbal medicine and commercial Tartary buckwheat tea were highly consistent with the labeled quantity and the results of HPLC determination, respectively, suggesting the sensor possessed excellent selectivity and accuracy. This proposed strategy for rutin determination is expected to expand the application of MXene heterostructure in electrochemical sensors, and is envisioned as a promising candidate for quality monitoring of drugs and foods.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zhengyu Yao,Zhongyuan Yuan,Mengdi Xue,Chaowei Li,Wei Zhang,Yijun Fu,Dawei Li
A dual-mode hydrogel integrates passive body-heat and active photothermal harvesting. • Electrospun CA fibers enable interfacial interlocking (250% strain, >95% retention). • High Seebeck coefficient of 1.8 mV K −1 from SO 4 2− /SO 3 2− thermogalvanic effect • Photothermal effect generates ΔT of 13.8 K under one-sun irradiation to boost output. • Continuous capacitor charging and LED operation under both body heat and solar light Continuous micropower is critical for next-generation wearable electronics. However, ionic thermoelectric hydrogels relying solely on body heat are limited by the inherently small skin-air temperature gradient (ΔT), leading to inadequate and fluctuating output. We propose a dual-mode harvesting strategy employing a hierarchical MXene/cellulose acetate (CA)-polyvinyl alcohol (PVA)/PEDOT:PSS (PSPDN) hydrogel thermocell. This 3D porous hydrogel exhibits high stretchability (250%) and sustained water retention, ensuring uninterrupted thermogalvanic ion transport. In passive mode, it harvests body heat to generate a stable baseline voltage, maintaining >95% output after 100 deformation cycles. Under illumination, the MXene/CA membrane acts as a broadband solar absorber to activate an active enhancement mode. Photothermal amplification of the thermogalvanic output enlarges the localized ΔT to 13.8 K under one-sun irradiation, boosting the estimated output power by more than an order of magnitude over the body-heat baseline and yielding a Seebeck coefficient of ~1.8 mV K −1 . With stable low-voltage output, the device charges capacitors and supports LED demonstrations of its thermovoltage response under various environmental triggers. This dual-mode concept—the passive body-heat mode guarantees a weather-independent baseline while the active mode adds solar gain whenever irradiation is available—offers a practical route toward uninterrupted self-powered wearable systems. A dual-mode MXene/CA-PSPDN hydrogel enables complementary body-heat and photothermal energy harvesting by combining passive body-heat thermoelectric generation with active solar-driven photothermal amplification. An electrospun nanofiber interlocking interface ensures 250% stretchability and 95% voltage retention after 100 cycles. The thermocell achieves a high Seebeck coefficient of 1.8 mV K −1 , with ΔT reaching 13.8 K under one-sun irradiation, delivering continuous output for self-powered wearables. Download: Download high-res image (237KB) Download: Download full-size image
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
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IF 5.4
Yao Zhang,Jiefang Feng,Juan Yang,Feiyang Chen,Yunjia Liu,Xiaoxian Hu,Lijin Huang,Nianjun Yang
Detecting trace nitrofurantoin (NFT) residues in food and water is critical for public health, yet practical applications are constrained by the scarcity of highly sensitive sensing materials. Herein, an MXene/amino-functionalized carbon nanotubes (NH 2 -CNTs) hybrid composite was fabricated via a facile electrostatic self-assembly strategy for NFT sensing. In this design, the positively charged NH 2 -CNTs spontaneously assemble with negatively charged MXene nanosheets through strong electrostatic interactions, serving simultaneously as interlayer spacers to effectively prevent MXene restacking and as highly conductive bridges with excellent electrocatalytic activity. This synergistic assembly yields a three-dimensional interconnected conductive network, which endows the composite with significantly enhanced electron-transfer kinetics, enlarged electrochemically active surface area, and superior electrocatalytic activity, thereby enabling pronounced signal amplification. Consequently, the optimized sensor with a mass ratio of 5:1 delivered excellent analytical performance toward NFT, with an ultrahigh sensitivity of 22.11 μA μM −1 cm −2 , a linear detection range of 0.05–15 μM, and a detection limit of 17 nM. Moreover, the sensor was successfully applied to the quantitative determination of NFT in milk, environmental water and honey samples, affording recoveries of 94.7–107.5%. These findings provide a facile strategy to overcome MXene restacking and highlight the promising potential of this sensing platform for food safety and environmental monitoring. Download: Download high-res image (148KB) Download: Download full-size image
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 12
·期 1
·276-285
·
IF 6.4
Binzhe Tan,Dongya Guo,Zhirong Tao,Zhibo Chen,Zhijian Lv,Guozhang Wu,Yu Lin
Two-dimensional MXene materials show great potential for electromagnetic interference (EMI) shielding application because of their superior electrical conductivity. However, the susceptibility to oxidation and the mechanical brittleness of MXenes greatly limit their extensive application. Herein, an ultrathin flexible polyimide (PI)/Ti3C2TX composite film with a nacre-like lamellar structure is successfully prepared using a simple vacuum filtration and thermal imidization process. Owing to the addition of PI, the composite film exhibits excellent mechanical properties with a tensile strength of 114.9 MPa and a fracture strain of 3.0%. Moreover, the nacre-like lamellar structure is conducive to multiple internal reflections, giving rise to the absorption of electromagnetic waves. The PI/Ti3C2TX composite film exhibits an outstanding EMI shielding effectiveness of 37 dB in the X-band range with an ultrathin thickness of only 15 μm. Furthermore, PI serves as an antioxidation coating, and its EMI shielding performance is maintained even when the composite film is exposed to various harsh environments. Therefore, the resulting composite film exhibits excellent EMI shielding stability and durability, which enables the potential application of high-performance EMI shielding materials against harsh environments.
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危险品化学品经营许可证（带存储）