查找使用阿拉丁产品的科研文献

Antioxidant MXene/TA/Nanocellulose Hybrid Ink for Screen Printing of Multifunctional Smart Textiles with Enhanced Antibacterial Performance

Pengcheng Deng,Nanjing Li,Ye Feng,Zhiqing Liu,Canhui Lu,Zehang Zhou

With the rapid advancement of electronic technology, the demand for wearable and portable electronic devices has significantly increased. MXene-based multifunctional textiles have attracted extensive attention from researchers due to their unique various functionalities, while the poor oxidation and structure stability limit their applications. In this study, a novel MXene/tannic acid-modified cellulose nanofibers (TACNF)-based multifunctional textile was prepared by screen-printing and post treatment. The abundant phenolic hydroxyl groups in TA effectively protect the MXene nanosheets from oxidation. The subsequent ZnCl2 cross-linking treatment leads to the metal coordination between Zn ions and TA molecules, which further improves the structure stability of the composite coating and endows the functional textile with enhanced antimicrobial activity against Escherichia coli and Staphylococcus aureus. The composite textile with a rationally designed electrically conductive structure demonstrates decent sensing ability toward tiny and large human motions, and its exceptional photo-/electro-thermal conversion ability also enables promising potential applications in thermal therapy and heat sterilization. This study provides new insights for the design and fabrication of smart healthcare textiles.

An “All-in-One” Strategy to Reconstruct Temporomandibular Joint Osteoarthritic Microenvironment Using γ-Fe2O3@TA@ALN Nanoparticles

Xiao Cen,Junjie Deng,Xuefeng Pan,Rufang Wei,Zhimao Huang,Rong Tang,Shengkai Lu,Rong Wang,Zhihe Zhao,Xinqi Huang

Current clinical strategies for the treatment of temporomandibular joint osteoarthritis (TMJOA) primarily target cartilage biology, overlooking the synergetic effect of various cells and inorganic components in shaping the arthritic microenvironment, thereby impeding the effectiveness of existing therapeutic options for TMJOA. Here, γ-Fe 2 O 3 @TA@ALN magnetic nanoparticles (γ-Fe 2 O 3 @TA@ALN MNPs) composed of γ-Fe 2 O 3 , tannic acid (TA), and alendronate sodium (ALN) are engineered to reconstruct the osteoarthritic microenvironment and mitigate TMJOA progression. γ-Fe 2 O 3 @TA@ALN MNPs can promote chondrocytes’ proliferation, facilitate chondrogenesis and anisotropic organization, enhance lubrication and reduce cartilage wear, and encourage cell movement. Magnetic-responsive γ-Fe 2 O 3 @TA@ALN MNPs also exhibit pH sensitivity, which undergoes decomposition within acidic environment to release ALN on demand. Under a 0.2 T static magnetic field, γ-Fe 2 O 3 @TA@ALN MNPs accelerate the synthesis of cartilage-specific proteins, and suppress catabolic-related genes expression and reactive oxygen species generation, affording additional protection to TMJ cartilage. In TMJOA mouse models, articular injection of γ-Fe 2 O 3 @TA@ALN MNPs effectively alleviates cartilage degeneration and subchondral bone loss in short and long terms, offering promising avenues for the development of therapeutic interventions for TMJOA.

TA-V Nanozymes with Acid Resistance Capabilities Effectively Target and Alleviate Ulcerative Colitis Lesions via Oral Delivery

Zhenzhen Jin,Xiangjing Cao,Qinglong Guo,Cong Zhang,Qingrong Li,Wenqi Wang,Yong Lv,Yan Ma,Xianwen Wang

As one of the most common inflammatory bowel diseases (IBDs), ulcerative colitis (UC) has become a rising global health issue that affects people’s quality of life. Conventional therapeutic drugs have low bioavailability and may cause serious side effects due to their lack of acidic resistance and lesion-targeting capabilities. The development of novel nanomedicines to overcome these problems is urgently needed. Nanozymes have attracted attention because of their excellent catalytic efficiency in various harsh environments. In this study, tannic acid-vanadium (TA-V) nanozymes with multienzymatic and excellent antioxidant abilities, which exhibit acidic resistance and a negative surface charge, were successfully developed. All these characteristics make it possible that these nanozymes are not easily decomposed by gastric acid and can effectively accumulate in colitis lesions with a positive charge through oral delivery. In vitro and in vivo experiments further demonstrated the excellent prophylactic and therapeutic value of these compounds in the treatment of UC by scavenging reactive oxygen/nitrogen species (ROS/RNS) and mitigating the oxidative stress environment, thus downregulating the levels of the proinflammatory cytokines IL-1β, IL-6, and TNF-α. Furthermore, TA-V also showed excellent biosafety and biocompatibility without causing obvious damage to the main organs. This work provides novel preventative and therapeutic TA-V nanozymes that might have potential clinical applications in UC treatment.

Multifunctional TA-CuS NPs-based conductive hydrogel with antibacterial capability for wearable real-time human motion sensor

Lijia Zhao,Shuang Ma,Huan Wang,Zekun Chen,Ren Wang,Guiye Shan

Hydrogel-based flexible sensors have attracted significant attention in the fields of motion sensing. However, the construction of hydrogel substrate with long-term stability for humid and sweating conditions sensing still remains challenging. Herein, tannic acid-modified copper sulfide nanoparticles (TA-CuS NPs)-based multifunctional hydrogel with excellent adhesion, mechanical strength, swelling ability and antibacterial properties was developed as wearable sensor for sensitive and durable motion monitoring in moist environments. The hydrogel, containing abundant phenolic hydroxyl groups, allows dynamic cross-linking with sodium alginate (SA) and polyacrylamide (PAM), improving tensile strain to 1590 % and adhesion strength to 32 kPa. Meanwhile, its electrical conductivity increased from 0.02403 S·m −1 to 0.11432 S·m −1 , attributed to the formation of conductive pathways and interfacial interactions between TA-CuS NPs and polymer chains. Additionally, the incorporation of ions and hydrophilic functional groups within the hydrogel imparts superior swelling behavior and ionic conductivity, which facilitates sweat adsorption and stable signal transmission. Further, the peroxidase-like (POD)-like activity of TA-CuS NPs-based hydrogel promotes the generation of hydroxyl radicals (·OH), effectively inhibiting the growth of both Staphylococcus aureus (88.0 %) and Escherichia coli (93.8 %) within 24 h. As a result, this multifunctional flexible hydrogel-based sensor, endowed with sweat management and antibacterial capability can achieve the real-time and reliable human motion monitoring in wet scenarios with the working range of 0–500 %, and can further combine with designed integrated circuit and Bluetooth for wireless signals output. This designed wireless system allows for the recognition of various motions and provides early warnings of harmful motions, demonstrating the potential for practical application in the field of wearable sensing.

Mussel-Inspired TA-Laponite-Doped Carbon Nanotube-Reinforced Hydrogels as Antibacterial Strain Sensors with High Mechanical Toughness

Xiaotao Liang,Wang Xu,Yanmin Ma,Xue Lv

Flexible hydrogel sensors have garnered significant interest owing to their biocompatibility and tissue similarity. Nevertheless, challenges such as inadequate mechanical strength, poor interface adhesion, lack of antimicrobial properties, and low conductivity impeded their practical utilization. This research aimed to address traditional hydrogels’ poor mechanical strength, interface adhesion issues, and lack of antibacterial properties, expanding their applications. Drawing inspiration from mussel adhesion, we crafted an innovative hydrogel using tannic acid (TA) as an adhesive, enhanced with ionic liquids (ILs) for the exfoliation of magnesium lithium silicate (Laponite) for mechanical improvement and carbon nanotubes (c-MWCNTs) for electrical enhancement. The prepared PAM/Lap-IL/TA/c-MWCNTs hydrogel showed a fracture stress of 461 kPa and a notable strain of 6800%, with an outstanding adhesive capacity (163 N/m). The prepared sensor can successfully monitor various human movements and exhibits good electrical conductivity (16.4 S/cm, GF = 3.15), quick reaction time (200 ms), and notable antibacterial activity. Crucially, this versatile conductive hydrogel has potential applications in electronic products and medical diagnostic health monitoring.

Multifunctional Crosslinked PAA–TA Binder: Robust Structural Integrity and Suppressed Manganese Dissolution for High–Performance LiMn0.6Fe0.4PO4 Cathodes

A poly (acrylic acid–tannic acid) (PAA–TA) crosslinked composite is reported on for the first time as an aqueous binder for LiMn0.6Fe0.4PO4(LMFP) cathodes to suppress manganese dissolution. Benefiting from hydrogen bonding and chemical crosslinking, the PAA-TA binder constructs a robust three-dimensional network that strengthens the interfacial adhesion among active particles, conductive additives, and the current collector, stabilizing the LMFP crystal structure upon cycling. More importantly, this polymeric network effectively restrains manganese leaching, which is the major origin of the capacity fading of LMFP cathodes. Meanwhile, continuous electron and ion transport pathways are well established. The LMFP electrode with an optimized PA5TA1 binder delivers a reversible capacity of 112 mAh g−1at 5 C and retains 81.3% of its capacity after 300 cycles, outperforming the PVDF/LMFP electrode. Post–mortem analyses of cycled LMFP cathodes further confirm that there was substantially suppressed Mn2+dissolution in the PAA–TA electrode, corroborating the structural integrity of the cathode–electrolyte interface. This crosslinked aqueous polymer provides a sustainable alternative to the PVDF binder for long–life LMFP cathodes.

Magnetron sputtering deposition of titanium films on the surface of Li₆.₄La₃Zr₁.₄Ta₀.₆O₁₂ electrolyte tablets

Zexian Xu,Wen Zhu,Weixing Liu,Wenbo Liu,Zican Liu,Ken Chen,Kang Li,Peiqi Lun,Jiawei Zhu,Muhammad Idrees,Saima Batool

The garnet-type Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) is considered a promising solid-state electrolyte (SSE) due to its high ionic conductivity and electrochemical stability. However, the surface of LLZTO easily reacts with H 2 O and CO 2 in the air, forming a passivation layer of Li 2 CO 3 . This reaction further deteriorates the interface between LLZTO and the Li anode, resulting in poor wettability. Consequently, significant gaps form between LLZTO and the Li anode, leading to uneven deposition of Li during the cycling. Li dendrites can grow into these gaps, eventually penetrating the electrolyte and causing a short circuit in the battery. In this study, a surface modification method is investigated, where a thin film of titanium is deposited onto the surface of LLZTO electrolyte tablets using magnetron sputtering. The effects of magnetron sputtering deposition titanium film process parameters—chamber pressure, bias voltage, and temperature—on the electrochemical properties of button cells were investigated. The results indicated that LLZTO electrolyte tablets coated with titanium exhibited low interfacial resistance, high cycle stability, and significant inhibition of Li dendrites under optimized conditions of 1.0 Pa chamber pressure, 100 V bias voltage, and 150 ℃ temperature. Under these conditions, the interface resistance decreased significantly from 1437.9 Ω to 190.19 Ω. Additionally, the Li symmetric cell assembled with the titanium-coated LLZTO electrolyte tablet demonstrated stable cycling for over 1200 h at 25 ℃ under a current density of 0.1 mA·cm −2 .

Fabrication of loose nanofiltration membranes by regulation TA-Fe(III) coordination for efficient dye/divalent salt separation

Jiahui Ma,Bin Jiang,Longfei Zhang,Feihong Chu,Na Yang,Yongli Sun,Luhong Zhang

Traditional textile wastewater treatment methods face significant challenges in achieving effective dye/salt separation with low energy consumption. In this study, a high-performance loose nanofiltration (LNF) membrane based on metal-polyphenol bio-adhesion was fabricated. By exchanging Fe 3+ onto Laponite (Lp) nanosheets, the coordination between tannic acid (TA) and Fe 3+ was controlled, optimizing the structure of the selective layer. Subsequently, PVP was introduced to regulate membrane structure owing to the hydrogen bonding between TA and PVP, thereby enhancing both separation performance and stability of the membrane. The optimized Fe@Lp/TA-PVP membrane exhibited favorable separation performance by modulating preparation conditions including the Fe 3+ exchanging on Lp nanosheets, PVP concentration, and coating time. The LNF membrane possessed high water permeability (167.7 L·m −2 ·h −1 ·bar −1 ) and favorable separating efficiency for dyes from salts. A high rejection of 99.9 % was achieved for Congo Red and Methyl Blue, while the rejection of Na 2 SO 4 and MgCl 2 remained low, at 8.93 % and 2.21 %, respectively. Besides, the membrane demonstrated desirable antifouling capability. Therefore, this work enriches the applications of metal-polyphenol coordination in water treatment, provides new insights into the design of LNF membranes.

Controllable adjustment of Ta and Cu material removal rate in TSV tantalum-based barrier layer planarization process

Du Zhanjie,Wang Ru,Liu Bin,Zheng Tao,Dong Yanwei,Chen Xuhua,Liu Zeyu,Han Shengxing,Zeng Yao,Li Yiken

Through Silicon Via (TSV), a kind of 3D packaging technique, can improve chip integration based on “More than Moore” scheme. The larger copper area ratio at the TSV barrier layer interface requires strong adjustability of the removal rate selection ratio of copper, tantalum and TEOS–SiO 2 , and stronger surface defect control and surface profile correction capabilities. In this paper, the effects of guanidine hydrochloride (GH) and 2,2′-[[(Methyl-1H-benzotriazol-1-yl)methyl]imino]bisethanol (TT-LYK) system on the tunability of Ta and Cu removal rate in chemical mechanical polishing (CMP) of TSV wafer barrier material were studied. GH can complex \({\text{TaO}}_{4}^{{3}-}\) , while TT-LYK can form a protective film on the surface of Cu, thereby achieving rate regulation. The results showed that when the concentration of GH increased from 0 to 2 wt%, the removal rate selectivity ratio of Ta and Cu raised from 1.02:1 to 1.26:1. When the concentration of TT-LYK increased from 2.5 to 10 mmol/L, the removal rate selectivity ratio of Ta and Cu increased from 1.33:1 to 1.79:1, which verified that the GH and TT-LYK systems can efficiently regulate the rate and rate selection ratio of Ta and Cu. Surface roughness for both metals decreased from pre-polishing values of 5.03 nm to post-polishing values of 0.37 nm for Ta, from pre-polishing values of 5.33 nm to post-polishing values of 1.26 nm for Cu indicating that GH and TT-LYK systems significantly improved the surface quality. Graphical abstract

Towards suppressing dielectric loss of GO/PVDF nanocomposites with TA-Fe coordination complexes as an interface layer

Ying Gong,Wenying Zhou,Zijun Wang,Li Xu,Yujia Kou,Huiwu Cai,Xiangrong Liu,Qingguo Chen,Zhi-Min Dang

In this work, graphene oxide (GO) nanosheets with surface modification by Tannic and Fe coordination complexes (TA-Fe) were incorporated into poly(vinylidene fluoride) (PVDF) to prepare high constant but low loss polymer nanocomposites , and the effect of TA-Fe interlayer on dielectric properties of the GO@TA-Fe/PVDF nanocomposites was investigated. The results indicate that the dosage, mixing ratio, and reaction time of TA-Fe complexes have obvious influences on the dielectric properties of the nanocomposites. Furthermore, the TA-Fe interlayer significantly influences the electrical properties of GO@TA-Fe nanoparticles and their PVDF composites, and the GO@TA-Fe/PVDF composites exhibit superior dielectric properties compared with raw GO/PVDF. Dielectric losses of the GO@TA-Fe/PVDF are significantly suppressed to a rather low level owing to the presence of TA-Fe layer, which serves as an interlayer between the GO sheets, thus preventing them from direct contacting with each other. Additionally, the dynamic dielectric relaxation of the GO/PVDF and GO@TA-Fe/PVDF nanocomposites was investigated in terms of temperature.

A TA/Cu2+ Nanoparticle Enhanced Carboxymethyl Chitosan-Based Hydrogel Dressing with Antioxidant Properties and Promoting Wound Healing

Yongjun Huang,Yong Chen,Guoyun Cheng,Wenqiang Li,Hongan Zhang,Chaoqun Yu,Jia Fang,Jieyi Zuo,Ying Li,Lei Xu,Dawei Sun

Background As the first line of immune defense and the largest organ of body, skin is vulnerable to damage caused by surgery, burns, collisions and other factors. Wound healing in the skin is a long and complex physiological process that is influenced by a number of different factors. Proper wound care can greatly improve the speed of wound healing and reduce the generation of scars. However, traditional wound dressings (bandages, gauze, etc.) often used in clinical practice have a single function, lack of active ingredients and are limited in use. Hydrogels with three-dimensional network structure are a potential biomedical material because of their physical and chemical environment similar to extracellular matrix. In particular, hydrogel dressings with low price, good biocompatibility, degradability, antibacterial and angiogenic activity are favored by the public.Methods Here, a carboxymethyl chitosan-based hydrogel dressing (CMCS-TA/Cu2+) reinforced by copper ion crosslinked tannic acid (TA/Cu2+) nanoparticles was developed. This study investigated the physical and chemical characteristics, cytotoxicity, and angiogenesis of TA/Cu2+ nanoparticles and CMCS-TA/Cu2+ hydrogels. Furthermore, a full-thickness skin defect wound model was employed to assess the in vivo wound healing capacity of hydrogel dressings.Results The introduction of TA/Cu2+ nanoparticles not only could increase the mechanical properties of the hydrogel but also continuously releases copper ions to promote cell migration (the cell migration could reach 92% at 48 h) and tubule formation, remove free radicals and promote wound healing (repair rate could reach 90% at 9 days).Conclusion Experiments have proved that CMCS-TA/Cu2+ hydrogel has good cytocompatibility, antioxidant and wound healing ability, providing an advantageous solution for skin repair.

Design of a novel TA-MoS2 nanosheets interlayer-based loose nanofiltration membrane for enhanced dye/salt separation

Jinsong He,Tingyan Deng,Linzhi He,Xiaochan An,K.G. Nadeeshani Nanayakkara,Fei Shen,Yanzong Zhang,Jianmei Zou,Li Zhao

From the view of sustainable development, the loose nanofiltration (LNF) membrane with high permeability and excellent separation of dye/salt mixture becomes more attractive for dye-containing wastewater. However, the previous LNF membranes inevitably suffered from the permeability-selectivity trade-off due to the inherent nature of polymer-based selective layer. This study reported a tannic acid (TA)-MoS 2 nanosheets (NSs) interlayered nanocomposite polyester (PE) LNF membrane (iLNF-3) that exhibited a remarkably enhanced water permeance of 55.8 LMH·bar −1 compared to the control LNF membrane of 27.3 LMH·bar −1 , and a higher separation selectivity of dye/salt (rejection rate: 99.6 % for congo red, 98.0 % for methyl blue, 5.6 % for Na 2 SO 4 , respectively). Furthermore, the iLNF-3 showed high ionic interference resistance, long-term stability, and superior antifouling performance. The enhanced permeance and dye/salt separation were mainly attributed to the introduction of a high-permeability TA-MoS 2 NSs interlayer . In particular, the permeability was improved due to the “gutter” effect and nanochannels and the formed thinner PE selective layer caused by TA-MoS 2 NSs interlayer. Notably, the selectivity was enhanced owing to the looser porous structure of PE layer resulting from the slow diffusion rate of aqueous monomer . This study can provide a foundational framework for the development of iLNF membranes for treating dye containing wastewater.