JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhiwen Chen,Jingchen Ma,Xiaoyu Zhang,Aixiang Wei,Ningqi Luo,Yuding He,Yu Zhao,Zhen Liu,Jiaxiong Xu
Designing and fabricating flexible piezoresistive pressure sensors (FPPS) with simultaneous high sensitivity and a broad linear working region remains a considerable challenge. In this work, thermoplastic polyurethane (TPU) fiber films were first prepared via electrospinning. Then, the CNTs were anchored onto the surface of a TPU fiber films via ultrasonication as the driving force. Finally, polydimethylsiloxane (PDMS) was used to modify the CNT/TPU and obtain the PDMS/CNT/TPU composite materials. The electrical and mechanical properties of CNT/TPU and PDMS/CNT/TPU were studied. The sensor performances of FPPS based on CNT/TPU and PDMS/CNT/TPU were analyzed and compared. These results prove that the sensitivity of FPPS is significantly improved after the PDMS modification. The optimized PDMS/CNT/TPU FPPS has a sensitivity of 1.43 kPa −1 in a ultra-broad linear working region of 0–2500 kPa and cycling stability over 6000 cycles. FPPS has been successfully used to monitor physiological signals and human movements, which indicates great potential for wearable electronics and human-machine interfaces.
研究领域:
材料科学
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生物医学工程
·
传感技术
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Jiaoxia Sun,Xueting Jiang,Hong Xiang,Xi Wang,Xue Luo,Jiang Fu,Jianxin Fan
Perfluorooctanoic acid (PFOA) and its analogs, such as perfluorocaproic acid (PFHxA), perfluorobutyric acid (PFBA), and perfluoro(2-methyl-3-oxahexanoic) acid (GenX), present environmental contamination concerns due to their toxicity. To addressing this, in this study, we have explored the utility of thermoplastic polyurethane/polyethyleneimine (TPU/PEI) nanofibers , synthesized via electrospinning, for the efficient removal of PFOA and its analogs from aqueous solutions. Combining the positively charged amino groups of PEI and hydrophobicity of TPU potentially enhances adsorption. Further, the TPU/PEI nanofibers exhibit a distinctive nano-phase separation morphology, creating abundant adsorption sites conducive to PFAS binding. Batch adsorption experiments indicated that TPU/PEI nanofibers possess notable adsorption capacities for PFOA and its analogs. The observed adsorption capacities were ranked as follows: PFOA (0.931 mmol/g) > PFHxA (0.872 mmol/g) > PFBA (0.827 mmol/g) > GenX (0.771 mmol/g), thus showing a correlation with their respective octanol–water partition coefficient (K ow ) values. Both inorganic ions and organic matter exerted more pronounced adverse effects on the adsorption of PFBA and GenX than on those of PFOA and PFHxA. This observation can be linked to competitive adsorption with PFAS. Impressively, the TPU/PEI nanofibers maintained a high removal efficiency across multiple regeneration cycles, with more than 95 % adsorption capacity retained after five cycles. To the best of our knowledge, this study is the inaugural demonstration of utilizing a TPU and PEI blend for remediation of both long-chain and short-chain PFAS in highly polluted wastewater, positioning it as a promising, accessible material for such applications.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2023
·
IF 2.9
Lihua Guan,Huijing Zhao,Kai Wang,Ke-qin Zhang,Kai Meng
Compliance mismatch between the artificial blood vessel and the host vessel leads to abnormal hemodynamics and is a major mechanical trigger of intimal hyperplasia. Efforts have been made to achieve higher compliance of artificial blood vessels. However, the preparation of artificial blood vessels with compliance matching to host vessels has not been realized. A bi-layered artificial blood vessel was successfully prepared by dip-coating and electrospinning composite method using poly(L-Lactide-co-caprolactone) (PLCL) and thermoplastic poly(ether urethane) (TPU). In the case of a certain wall thickness (200 μm), thickness ratios of the PLCL inner layer (dip-coating method) and TPU outer layer (electrospinning method) were controlled at 0:1, 1:9, 3:7, 5:5, 7:3, and 1:0 respectively and the compliance, radial tensile properties, burst pressure, and suture retention strength were investigated. Results showed compliance value of the artificial blood vessel decreased with the increase of the thickness ratio, which suggested the compliance of the bi-layered artificial blood vessel can be regulated by adjusting the ratio of the inner and outer layer thicknesses. In the six different artificial blood vessels, the one with thickness ratio of 1:9 not only had high compliance (8.768 ± 0.393%/100 mmHg) but also can guarantee the other mechanical properties, such as the radial breaking strength (6.333 ± 0.689 N/mm), burst pressure (534.473 ± 20.899 mmHg), and suture retention strength (300.773 ± 9.351 cN). The proposed artificial blood vessel preparation method is expected to achieve compliance matching with the host vessel. It is beneficial for eliminating abnormal hemodynamics and reducing intimal hyperplasia.
研究领域:
生物医学工程
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材料科学
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心血管外科
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
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IF 9.7
Jinfeng Liu,Chengcheng Wang,Liping Zhang,Shaohai Fu
As a critical component for real-time monitoring in smart wearable devices, dual-mode strain sensors offer instantaneous responses to mechanical stimuli through optical and electrical signals, playing a crucial role in monitoring human physiological states in real time. Here, an innovative dual-mode strain sensing fiber was designed and fabricated by integrating PS@P(MMA-BA) photonic crystal nanospheres onto MXene/TPU electrical sensing fibers. It swiftly responds to strain stimuli while simultaneously delivering optical and electrical signals. Based on the advantages of preparation methodology and sensing sensitivity, the smart fiber sensor exhibits rapid fabrication, angle-independent structural color, dynamic visual color change, a wide strain range (0–50 %), and high sensitivity (GF: 22.55 at 10 %). The design concept of dual-mode strain sensing fiber holds promising applications in wearable technology for real-time monitoring of human–machine interaction, health tracking, and smart wearable devices.
研究领域:
材料科学
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生物医学工程
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智能可穿戴设备
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产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
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2025
·
IF 2.3
Mesbah Md Rubin,Imran Hossain Md,Hu Yi
Thermoplastic polyurethane (TPU) nanofibers were successfully fabricated using natural dyes derived from turmeric and black tea via an electrospinning process, offering a sustainable and eco-friendly alternative to synthetic dyes. This study addresses the environmental and health concerns associated with synthetic dyes by systematically optimizing the dyeing process. We determined that 80 °C for 60 min is ideal for turmeric dye extraction, while 60 °C for 60 min yields the best results for black tea, achieving superior color yield and mechanical performance. The incorporation of natural dyes significantly enhanced the mechanical properties of the nanofibers, with turmeric-dyed nanofibers exhibiting a tensile strength of 31 MPa and strain elongation of 153.21% and black tea-dyed nanofibers achieving a tensile strength of 45 MPa and 99% strain elongation. The dyed nanofibers demonstrated excellent colorfastness to washing, rubbing, and light exposure as evaluated by the ISO 105-C10:2006 standard method, ensuring their durability in practical applications. Additionally, the nanofibers exhibited functional properties, including UV protection, antibacterial activity, and antioxidant effects, making them suitable for applications in protective clothing, filtration membranes, tissue engineering scaffolds, and drug delivery systems. This research highlights the dual advantages of natural dyes in improving both the mechanical performance and functional properties of TPU nanofibers. By replacing synthetic dyes with natural alternatives, this study offers a sustainable solution to reduce the environmental impact of textile production and supports their commercialization.
研究领域:
材料科学
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纳米技术
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纺织工程
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高分子科学
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环境科学
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生物医学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yanglei Xie,Jiajun Zhu,Licai Fu,Wulin Yang,Deyi Li,Lingping Zhou
Hydrophilic thermoplastic polyurethane (TPU) is applicable in the fields of packaging, oil–water separation, and biomedical. Nevertheless, the process of its preparation is still a great challenge. The objective of this study is to develop TPU with excellent wettability and hydrophilic stability by surface modification. Four methods were evaluated: coating with PVP (polyvinylpyrrolidone) solution, immersion in PVP solution, N 2 /Ar plasma treatment, and N 2 /Ar plasma-induced graft polymerization with PVP. Finally, the results indicate that the sample called TPU-g-PVP, which utilizes plasma-induced grafting, exhibits the best performance. The water contact angle (WCA) reduces from 109° to 9.2°, and maintains within 20° after 80 days under atmospheric conditions. Its surface energy (72.4 mN/m) is increased by 2.8 times than untreated TPU. The surface morphology and roughness are almost unchanged when compared to the original TPU. Some characteristic peaks (–OH and C = O) of PVP on the TPU-g-PVP were found by infrared spectroscopy. X-ray photoelectron spectroscopy (XPS) examination revealed a reduction in C on the TPU surface as the content of N and O increases. Experiments on biocompatibility showed that the PVP deposited substrates improved cell adherence without generating new cytotoxicity.
研究领域:
材料科学
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表面化学
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高分子科学
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生物医学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Jun Wang,Dongzhi Zhang,Dongyue Wang,Zhenyuan Xu,Hao Zhang,Xiaoya Chen,Zihu Wang,Hui Xia,Haolin Cai
Flexible wearable pressure sensors have received increasing attention as the potential application of flexible wearable devices in human health monitoring and artificial intelligence. However, the complex and expensive process of the conductive filler has limited its practical production and application on a large scale to a certain extent. This study presents a kind of piezoresistive sensor by sinking nonwoven fabrics (NWFs) into tungsten disulfide (WS2) and Ti3C2Tx MXene solutions. With the advantages of a simple production process and practicality, it is conducive to the realization of large-scale production. The assembled flexible pressure sensor exhibits high sensitivity (45.81 kPa–1), wide detection range (0–410 kPa), fast response/recovery time (18/36 ms), and excellent stability and long-term durability (up to 5000 test cycles). Because of the high elastic modulus of MXene and the synergistic effect between WS2 and MXene, the detection range and sensitivity of the piezoresistive pressure sensor are greatly improved, realizing the stable detection of human motion status in all directions. Meanwhile, its high sensitivity at low pressure allows the sensor to accurately detect weak signals such as weak airflow and wrist pulses. In addition, combining the sensor with deep-learning makes it easy to recognize human respiratory patterns with high accuracy, demonstrating its potential impact in the fields of ergonomics and low-cost flexible electronics.
研究领域:
材料科学
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生物医学工程
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人工智能
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaoyu Cui,Chengjing Miao,Shaowei Lu,Xingmin Liu,Yuxuan Yang,Jingchao Sun
Designing flexible wearable sensors with a wide sensing range, high sensitivity, and high stability is a vulnerable research direction with a futuristic field to study. In this paper, Ti3C2Tx MXene/carbon nanotube (CNT)/thermoplastic polyurethane (TPU)/polysulfone (PSF) composite films with excellent sensor performance were obtained by self-assembly of conductive fillers in TPU/PSF porous films with an asymmetric structure through vacuum filtration, and the porous films were prepared by the phase inversion method. The composite films consist of the upper part with finger-like “cavities” filled by MXene/CNTs, which reduces the microcracks in the conductive network during the tensile process, and the lower part has smaller apertures of a relatively dense resin cortex assisting the recovery process. The exclusive layer structure of the MXene/CNTs/TPU/PSF film sensor, with a thickness of 46.95 μm, contains 0.0339 mg/cm2 single-walled carbon nanotubes (SWNTs) and 0.348 mg/cm2 MXene only, providing functional range (0–80.7%), high sensitivity (up to 1265.18), and excellent stability and durability (stable sensing under 2300 fatigue tests, viable to the initial resistance), endurably cycled under large strains with serious damage to the conductive network. Finally, the MXene/CNTs/TPU/PSF film sensor is usable for monitoring pulse, swallow, tiptoe, and various joint bends in real time and distributing effective electrical signals. This paper implies that the MXene/CNTs/TPU/PSF film sensor has broad prospects in pragmatic applications.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yun-Fan Wang,Xiao-Yang Zhang,Jun-Yang Liu,Yuan-Jun Song,Yu-Qing Ni,Ze-Xian Chen,Yuan-Chun Li,Tong Zhang
The widespread use of human–computer interaction has generated enormous interest in stretchable and wearable electronic devices, such as smart gloves, wearable mice, electronic skins, and other sensors capturing deformation signals on human skins. The main challenge of such devices lies in monitoring multi-level human motions such as bending, stretching, and pressing. Developing new materials and fabrication methods is indispensable to tackle this challenge. In this paper, we propose a multi-model and naked-hand wearable sensing system based on Ag and thermoplastic polyurethane (Ag-TPU) composite with porous microstructure and direct writing technology which implements pressure sensing and strain sensing simultaneously. Dynamic response test illustrates that motion frequencies from 0.24 s −1 to 0.88 s −1 can be detected, covering the typical frequency of clicking operation on a mouse, with the response time between 156 ms and 609 ms at the frequency of 0.88 s −1 . Due to the protection of TPU polymer, this material remains stable and effective in1400 bends at a bending curvature from 0.17 to 0.2. These characteristics, along with the low cost, high sensing sensitivity, simple production procedure, biocompatibility, and wearability on the naked hand, make our material match the actual requirements of human–computer interaction mice. With an extra inertial measurement unit, the mouse can distinguish different gestures and finger movements in various frequencies. Through our test, it can control the cursor and paint on computers with the multi-model characteristic. Therefore, our wearable virtual mouse demonstrates a new way to match flexible materials with human–computer interaction interfaces, extending the application of Ag-TPU composite with multi-model sensing while ensuring the timeliness and accuracy of information transfer in the process of human–computer interaction.
研究领域:
材料科学
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电子工程
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生物医学工程
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 8
·期 1
·1-14
·
IF 23.2
Zhang Minyue,Liu Si,Liu Shun,Jia Gaoen,Zhan Pengfei,Liu Chuntai,Shen Changyu,Liu Hu
In recent years, as wearable electronics continue to advance toward flexible, lightweight, and versatile designs, flexible pressure sensors with wide response ranges and high sensitivity have shown tremendous research value and application potential. In this study, we fabricated TPU-based flexible pressure sensors with a multistage gradient porous structure using layer-by-layer freezing and solvent templating techniques. Due to the layered differences in Young’s modulus from varying porosities, these sensors exhibit high pressure sensitivity ( S , S MAX = 34.08 MPa −1 ) and can accurately distinguish stresses across a wide range (0–1.2 MPa). Additionally, they demonstrate rapid response and recovery times (140 ms), durability over 3000 compression cycles, and the ability to detect both subtle movements (facial expressions and swallowing) and larger actions (joint bends, walking, and running). Furthermore, we developed a smart glove using these gradient-structured pressure sensors combined with a K-nearest neighbor (KNN) algorithm, enabling accurate identification of various fruit types. Notably, the TPU sensors also exhibit excellent thermal insulation and Joule heating properties, making them effective for human thermal management even in extreme temperatures.
研究领域:
材料科学
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电子工程
·
人工智能
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2024
·
IF 7.6
Zhihua Zhao,Zijie Su,Zhenli Lv,Pu Shi
The potential applications of wearable sensors in health monitoring, micro-environment detection, and advanced soft electronic noses have attracted widespread attention. However, due to the inherent limitations of traditional organic flexible substrates, simultaneously achieving excellent flexibility, high sensitivity, robustness, and breathability remains a significant challenge. Herein, using the electrospinning method, a flexible TPU substrate film was prepared, and Bi 2 S 3 /Ti 3 C 2 T x nanocomposite materials were synthesized through a simple one-step hydrothermal method. Au nanoparticles were attached to the surface of the composite material using sodium borohydride, and finally, the surface impregnation method was used to successfully prepare the Au-Bi 2 S 3 /Ti 3 C 2 T x -TPU flexible electrospun mat. The as-prepared sensor demonstrated an outstanding response of 154 % to 100 ppm NH 3 at room temperature, coupled with high selectivity, repeatability, and long-term stability. The strain properties of the sensor were also evaluated, showcasing its potential for human motion and physiological feature detection, such as breathing, swallowing, and limb movements. The study’s findings indicated that the Au-Bi 2 S 3 /Ti 3 C 2 T x -TPU electrospun mat sensor has promising applications in flexible electronics, wearable environmental monitoring devices, and human healthy monitoring.
研究领域:
材料科学
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传感器技术
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环境监测
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 8
·1-16
·
IF 2.8
Yang Rui,Zheng Guangli,Liu Sucheng,Yan Tong,Song Huiyu
The solid polymer electrolyte (SPE) is always a hot topic in both academia and industry but the ionic conductivity of SPE, such as polyurethane-type electrolytes, is generally low. In this article, we prepared a TPU-based polymer solid electrolyte by incorporating polyethylene oxide-grafted polysiloxane (PDMS-PEO), and characterized it through a series of characterization methods including FTIR, SEM, XRD, DSC and DMA, investigating the influence of PDMS-PEO on the structure and conventional properties of the SPE. Furthermore, electrochemical workstation and battery tester were utilized for relevant characterization of SPE. Experimental results demonstrated that the addition of 5wt% TPU-based polymer solid electrolyte exhibited an ion conductivity of 2.0 × 10 −4 S/cm at room temperature. Additionally, the pouch-type symmetric cell assembled with this electrolyte achieved a cycling time exceeding 800 h at room temperature while the ion transference number of this electrolyte also increased with addition of PDMS-PEO.
研究领域:
材料科学
·
高分子化学
·
电化学
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固态电解质
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储能技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）