High-Performance Wearable Strain Sensor Based on MXene@Cotton Fabric with Network Structure

doi:10.21203/rs.3.rs-184921/v1

PDF

Research Article

High-Performance Wearable Strain Sensor Based on [email protected] Fabric with Network Structure

https://doi.org/10.21203/rs.3.rs-184921/v1

This work is licensed under a CC BY 4.0 License

Version 1

posted 05 Feb, 2021

You are reading this latest preprint version

Although 2D nanomaterials such as MXene Ti₃C₂T_x have been used in flexible electronic devices for their unique properties such as high conductivity, excellent mechanical performance, flexibility, and good hydrophilicity, less research has focused on of MXene-based cotton fabric strain sensors. Moreover, fabrication of wearable strain sensors with a low cost, high sensitivity, good biocompatibility, and broad sensing range is still a challenge. In this work, a high-performance wearable strain sensor composed of 2D MXene d-Ti₃C₂T_x nanomaterials and cotton fabric is reported. As the active material in the sensor, MXene d-Ti₃C₂T_x exhibited an excellent conductivity and hydrophilicity and adhered well to the fabric fibers by electrostatic adsorption. Due to the unique structure of the fabric substrate and the properties of MXene sheets, the fabricated pressure sensor achieved a high sensitivity. The gauge factor of the [email protected] fabric strain sensor reached up to 4.11 within the strain range of 15 %. Meanwhile, the sensor possessed high durability (>500 cycles) and a low strain detection limit of 0.3%. Finally, the encapsulated strain sensor was used to detect subtle or large body movements and exhibited a rapid response. This study shows that the [email protected] fabric strain sensor reported here have great potential for use in flexible, comfortable, and wearable devices for health monitoring and motion detection.

Ceramics

MXene

Cotton Fabric

Strain Sensor

Flexible

Compared to traditional electronic devices, flexible electronic devices have good flexibility, ductility, and can be easily bended, twisted, or folded ^[1]. Therefore, these flexible devices can meet the deformation requirements of equipment under different working conditions and have broad applications in flexible electronic displays ^[2], thin-film solar cells ^[3], flexible sensors ^[4], and wearable devices ^[5]. Among these, flexible wearable electronic devices have attracted considerable attention due to their enormous potential applications in personal health monitoring, biomedical research, and artificial intelligence ^[6–8]. Moreover, due to their simple structure and operating principles, superior sensing properties to various types of deformations, and good expansibility, resistance-type flexible stress/strain sensors have very broad application prospects in many fields ^{[9, 10]}. Wearable stress/strain sensors are in great demand with the rapid development of intelligent electronic devices. However, obtaining high-performance pressure sensors that simultaneously have a high sensitivity, wide response range, and low detection limit is still a considerable challenge Considerable research into the processing, structures, and materials of different sensors has been conducted in recent years to meet the demands for intelligent wearable devices and manufacture wearable electronic sensors with high sensitivity, high resolution, and fast responses.

The choice of the underlying flexible substrate has an important impact on the ultimate performance of the flexible stress/strain sensor. According to the material dimensions, flexible substrates can be divided into three types: one-dimensional fibers or yarn ^{[11, 12]}, two-dimensional films ^[13] and fabrics ^[14], and three-dimensional sponges/foams ^[15], gels ^[16] and other architectures ^[17]. Fabric-based flexible stress/strain sensors have obvious advantages in flexible electronic devices as they can withstand complicated deformations, such as bending, stretching, and twisting, and are made from simple and low-cost materials ^{[18, 19]}. Compared with other intelligent electronic devices such as membranes and foams, textile-based flexible mechanical sensors also can achieve a seamless connection with clothing, home textiles and other fabric products, and realize an integrated design. On the other hand, the active layer and the morphologies and microstructures of the sensing materials also have been widely recognized as important factors for improving the sensitivity of sensors. Carbon nanotubes ^{[20, 21]}, graphene ^[22], metal nanowires ^[23], and other nanomaterials often are used in the active layer due to their excellent properties. Yet it is still difficult and complicated to fabricate highly sensitive fabric-based flexible sensors due to low signal responses. Therefore, more research efforts should focus on developing of sensing materials and the fabrication processes of sensors.

Due to their large specific surface area, strong mechanical properties, and adjustable electrical properties, two-dimensional (2D) materials are very suitable for use as flexible piezoresistive sensor materials that can meet the performance requirements of high sensitivity over a wide sensing range in flexible strain/stress sensors ^[24]. As a new type of 2D materials, early transition metal carbides and/or nitrides, MXene, have attracted great attention ^[25–27]. Due to its unique 2D structure, MXene has displayed excellent performance in many fields, such as catalysis ^[28], energy storage ^{[29, 30]}, electromagnetic shielding ^[31], reinforced materials ^{[32, 33]}, and other fields ^[34–36]. For example, Guo et al. ^[37] fabricated a highly sensitive, flexible, and degradable pressure sensor by sandwiching porous MXene-impregnated tissue paper, which exhibited high sensitivity with a low detection limit (10.2 Pa), broad range (up to 30 kPa), fast response (11 ms), low power consumption (10 − 8 W), great reproducibility over 10 000 cycles, and excellent degradability. Li et al. ^[38] prepared a 2D MXene/ (0D-1D) silver nanocomposite-based strain sensor, which when incorporated into fabric, could act as an electrothermal device. Their composite yarn strain sensor had a remarkably high strain sensitivity, effectively monitoring both large and small deformations of various parts of the human body. Li et al. ^[39] proposed a flexible piezoresistive pressure sensor based on MXene–textiles prepared by a facile dip-coating process. The resulting pressure sensor exhibited high sensitivity with a rapid response time of 26 ms and excellent cycling stability. Liu et al. ^[40] fabricated a MXene-coated cotton fabric pressure sensor that showed a high gauge factor (7.67 kPa^− 1), a rapid response and relaxation speed (< 35 ms), excellent stability (> 2000 cycles), and good durability after washing. However, theoretical research of fabric sensors and industrially-applicable research still needs to be improved in many ways and studied more in depth.

Herein, a highly sensitive MXene-based flexible strain sensor was fabricated. An immersion method was employed to uniformly deposit a single-layer of Ti₃C₂T_x MXene nanosheets onto fabric through electrostatic interactions. As the applied strain increased, the network structure of the fabric effectively increased the contact area between the conductive channels, which led to an improved sensing performance of the strain sensor. The obtained strain sensor exhibited outstanding sensitivity (GF = 4.11), subtle strain detection limit (0.3%), and excellent stability over 500 cycles.

2.1. Preparation of MXene Ti₃C₂T_X and exfoliated d-Ti₃C₂T_X nanosheets

MAX phase Ti₃AlC₂, the precursor of MXene Ti₃C₂T_x, was synthetized by pressless sintering technology and passed 500 mesh sieves in the previous report ^[41]. MXene Ti₃C₂T_x were synthesized by selectively exfoliated “A” atoms from Ti₃AlC₂ in hydrochloric acid solution of sodium fluoride ^[42]. Subsequently, Ti₃C₂T_x powders were added to DMSO and magnetically stirred at room temperature for 18 h. Then the mixture was centrifuged at 8000 rpm for 10 min to obtain the precipitate, which was redispersed in 500 mL DI water, and ultrasonicated for 6 h under Ar flow. After that, the suspension was centrifuged at 3500 rpm for 1 h. The supernatant was collected to obtain the delaminated MXene suspension, and labelled as “d-Ti₃C₂T_x”.

2.2. Fabrication of [email protected] Fabric pressure/strain sensors

Typically, cotton fabric was wrapped by MXene sheets by immersion process. First, the cotton fabric was cut into rectangle shape with proper dimensions, which were washed with deionized water and ethanol several times to remove the impurities, and dried in a vacuum oven. Then, cotton fabric was immersed in an aqueous PEI solution (0.5 mg mL^− 1) for 24h. The PEI was adsorbed on the surface of the cotton fabric, and forming positively charged cotton [email protected], and drying in vacuum at 60°C for 2 h. Second, cotton [email protected] was immersed into the delaminated d-Ti₃C₂T_x dispersions for 1 h. Due to the strong electrostatic interaction between MXene sheets and PEI, the negatively charged d-Ti₃C₂T_x nanosheets were wrapped on the cotton fabric. Finally, the samples were dried in vacuum at 50°C for 5 h, and [email protected] Fabric strain sensors were obtained, labelled as “MCF” strain sensor.

2.3. Characterization

The morphologies and microstructures of MXene, Cotton Fabric, and MCF strain sensors were observed by field emission scanning electron microscope (FESEM, Hitachi S4800) with integrated Energy-dispersive X-ray spectroscopy (EDS) for element analysis. The crystal structure of samples was determined by X-ray diffractometer (XRD, D8 Advance Bruker X-ray diffractometer equipment with Cu Kα1 radiation (λ = 0.154 nm) with a scanning rate of 15°/min and a step size of 0.02° from 5° to 80°. Thickness of d-Ti₃C₂T_x was characterized by the atomic force microscopy (AFM, FM-Nanoview6800, Jiangsu, China,). The FTIR spectra were recorded on a PerkinElmer FT-IR spectrometer which was operated within 4000 − 500 cm^− 1 to characterize the surface structure of the samples. Thermogravimetric analysis (TGA) experiments were performed under an argon atmosphere between 30 and 550°C at a heating rate of 10°C/min in a Setaram Evolution 2400 instruments. The mechanical performances of the sensor were characterized with a Shandong Liangong CMT-20 universal testing machine. The Electrical signals of the MCF strain sensor were recorded with a source meter (Fluke 8845A).

SEM images of the Ti₃AlC₂ and MXenes Ti₃C₂T_x powder are shown in Fig. 1 (a, b). The Ti₃AlC₂ raw material had the typical structure of a layered MAX phase (Fig. 2a). After removing the Al atomic layers from the Ti₃AlC₂, the resulting MXene, Ti₃C₂T_x, had an accordion-like multi-layered structure (Fig. 1b). As seen in the SEM image of the d-Ti₃C₂T_x (as shown in Fig. 1c), the MXene (Ti₃C₂T_x) was delaminated into single- or few-layered d-Ti₃C₂T_x nanosheets. The thickness of the exfoliated MXene nanosheets was characterized by atomic force microscope (AFM) (Fig. 1d). AFM analysis indicated that the nanosheets had a thickness of about 1.5 nm (Fig. 1d inset), confirming the d- Ti₃C₂T_x was composed of a single or a few-layers of sheets. Moreover, the obtained, dark green MXene nanosheet solution was a stable dispersion in water (Fig. 1e) and an exhibited an obvious Tyndall effect. The XRD patterns of the MAX phase, MXene, and exfoliated MXene nanosheets are shown in Fig. 1f. Compared with MAX phase, the characteristic peak of Ti₃AlC₂ disappeared in the MXene pattern and a new diffraction peak appeared at 6.9° that belonged to the (002) orientation of MXene Ti₃C₂T_x ^[42]. After exfoliation, the (002) diffraction peak significantly shifted from 6.9° to a smaller angle of 5.86°, indicating that Ti₃C₂ was effectively delaminated into single- or few-layered nanosheets.

Figure 2a shows a schematic of the highly sensitive MXene/Cotton fabric strain sensor fabrication process. First, surface-modified cotton fabric was obtained by immersing clean fabric into a PEI solution for 24 h, followed by drying the fabric in an oven at 60°C (Fig. 2b). Then, the PEI-modified fabric was dipped into the MXene solution for a given time. The MXene was adsorbed onto the fabric fiber due to the electrostatic attraction between the MXene and the positively charged PEI on the fabric (Fig. 2c) during impregnation. Finally, the ends of the obtained MCF were coated with silver paste and attached to copper tape electrodes, and the material packaged within PDMS silicone rubber (Fig. 2d).

Figure 2e shows the FTIR spectra of the fabric, [email protected], and MCF, which gave insights into the functional groups present in the materials. As seen in Fig. 1f, the broad peak around 3200 ~ 3500 cm^− 1 was attributed to the O-H/N-H stretching from the PEI and cotton cellulose of the fabric. The peak near 2910 cm^− 1 was assigned to the C-H stretching vibration band. The characteristic peaks at 1652, 1430 ~ 1310, and 1017 cm^− 1 were assigned to C = O stretching, C-H bending, and C-O stretching ^[43], respectively. These characteristic absorption peaks weakened obviously after adsorption of the MXene. Therefore, it could be inferred that the fabric was wrapped in MXene nanosheets. To verify this, the sample also was characterized by XRD (Fig. 2f). It can be found that in addition to the characteristic diffraction peak of the cotton fabric, a new peak appeared at 5.86° which was attributed to d-Ti₃C₂T_x. In summary, the analytical results provided good evidence that the fabric surface was successfully capped with MXene d-Ti₃C₂T_x nanosheets. As can be seen from the TGA curves in Fig. 2g, all samples completely evaporated at temperatures higher than 400°C, and the MCF had the most ash residue. However, the thermal decomposition temperature was slightly lower due to the surface effect of nanomaterials.

SEM images of the clean, conductive cotton fabric and the MCF strain sensor are shown in Fig. 3. Figure 3a shows the morphology of the clean cotton fabric at different magnifications. It can be seen that the fabric consisted of woven cotton fiber bundles, and the surface of fibers were relatively smooth. Figure 3(c-e) shows the SEM imagess of the conductive MCF from different angles after dipping the fabric in the MXene suspension and drying. The smooth cotton fiber surface became rough after the flexible 2D MXene nanosheets decorated the fiber surface, and the assembled MXene nanosheets were observed on the cotton fibers. Hence, MXene decorated cotton fibers with a core-shell structure were obtained. Figure 3g is an SEM image of a MXene wrapped fiber and the corresponding elemental mapping. It was observed that Ti, C, and O were uniformly distributed on the cotton fiber surface, indicating the fiber was tightly wrapped by a layer of MXene nanosheets. Figure 3f shows that the conductive cotton fibers were well encapsulated by the PDMS layers that play a protective and restrictive role for the inner conductive cotton fibers, and the fabric structure was maintained after the encapsulation process.

Figure 4(a,b) shows the resistance change rates (ΔR/R₀) at different strains with repeated loading-unloading cycles under a tensile speed of 4 mm/min. During the stretching process, the tension led to a decrease in the yarn spacing, which resulted in the formation of conductive networks and a decrease in the resistance. The results showed that the greater the applied tension, the greater the measured change in the resistance rates. In addition, the corresponding ΔR/R₀ values were almost constant after different loading-unloading cycles, which indicated the high cyclic stability of the MCF strain sensor material. Figure 3c shows the tensile stress-strain curves at different strains with repeated loading-unloading cycles. It could be found that the strain of the sensor returned to the initial value after five cycles under different strains. These results indicated that the MCF strain sensor exhibited excellent cyclic stability performance in mechanics. Figure 4d gives the ΔR/R₀ of MCF strain sensor at different stretching frequencies under the same strain of 9%. These data suggested that the sensor also had a steady dynamic response to frequency changes from 0.01 to 0.375 Hz. The durability of the strain sensor under a tensile strain of 6% at a 150 mm/min strain rate is shown in Fig. 4e. The strain sensor had a very stable signal output after 500 cycles of loading-unloading tests, showing excellent repeatability, which revealed that the different components in the MCF strain sensor were highly compatible, structurally stability, and able to stretch and recover these properties during loading and unloading cycles.

Figure 4g is the schematic diagram of the formation of the conductive pathways in the stretching direction (L direction) and vertical direction (T direction). Figure 4g1 is the cross section of fiber bundle in an unstretched state, g2 is a stretched state in the L direction, and g3 is a stretched state in the T direction. Stretching the fabric in the L direction decreased the yarn spacing and made more contacts elsewhere on the surface of parallel fiber, which led to the formation of a conductive network between the conductive strands of yarn (g2) and the measured decrease in resistance. Meanwhile, stretching in the T direction increased the yarn spacing which led to the reconstruction of the conductive networks and the increase in resistance (g3). In both cases, the formation of conductive networks in L direction played a major role in the resistance variation.

As mentioned above, the MCF strain sensor possessed high sensitivity under different strains. A series of tests were carried out to detect different human motions to verify the feasibility of using this strain sensor as a wearable electronic device. As a result, the ΔR/R₀ value of MCF strain sensor increased and then returned to its initial state when the wearer tautologically bent his or her finger and leg (Fig. 5a and 5b, respectively), achieving detection from small to large human body movements. Figure 5c demonstrates the detection of eye movements by attaching the MCF strain sensor to the corner of eye. The MCF sensor accurately recorded strain changes and showed regular variations in the resistance due to the repeated eye motions during blinking. When the sensor was attached to the neck, it showed a repeatable electrical signal instantaneously for twisting motions of the neck joint, as shown in Fig. 5d. Furthermore, Fig. 5e and 5f show the stable response of the strain sensor under different pressures ranging from 0.98 to 3.92 kPa. Therefore, the MCF strain sensor may have potential application in wearable devices to monitor joint movements during human motion and health monitoring.

We have prepared a flexible, high-performance strain sensor based on cotton fabric and 2D MXene via a simple electrostatic self-assembly method. This flexible MCF piezoresistive pressure strain sensor had high sensitivity, a wide response range, and good stability. The MXene coated cotton fabric acted as a flexible and simple strain sensor and produced a variety of signals according to body motions, such as bending of a finger, squatting, blinking of an eye, and twisting of the neck. In addition, the flexible substrate, low active material content, and simple preparation process make the reported sensor more suitable for large-scale preparation and electronic skin applications. Moreover, this sensor is easily integrated into fabrics, which is significant for future applications in intelligent wearable devices.

Acknowledgements

This work was supported by National Natural Science Foundation of China (51772077), Program for Innovative Research Team (in Science and Technology) in the University of Henan Province (No. 19IRTSTHN027), Fundamental Research Funds for the Universities of Henan Province (NSFRF200101).

Wang J L, Hassan M, Liu J W, et al. Nanowire assemblies for flexible electronic devices: recent advances and perspectives. Advanced materials, 2018, 30(48): 1803430.
Koo J H, Kim D C, Shim H J, et al. Flexible and stretchable smart display: materials, fabrication, device design, and system integration. Advanced Functional Materials, 2018, 28(35): 1801834.
Lee T D, Ebong A U. A review of thin film solar cell technologies and challenges. Renewable and Sustainable Energy Reviews, 2017, 70: 1286-1297.
Han S T, Peng H, Sun Q, et al. An overview of the development of flexible sensors. Advanced Materials, 2017, 29(33): 1700375.
Kim H, Ahn J H. Graphene for flexible and wearable device applications. Carbon, 2017, 120: 244-257.
Gao W, Ota H, Kiriya D, et al. Flexible electronics toward wearable sensing. Accounts of chemical research, 2019, 52(3): 523-533.
Wang X, Liu Z, Zhang T. Flexible sensing electronics for wearable/attachable health monitoring. Small, 2017, 13(25): 1602790.
Ding Y, Xu T, Onyilagha O, et al. Recent Advances in Flexible and Wearable Pressure Sensors Based on Piezoresistive 3D Monolithic Conductive Sponges. ACS Applied Materials & Interfaces, 2019, 11(7):6685-6704
Peng W, Han L, Huang H, et al. Direction-aware and Ultrafast Self-healing Dual Network Hydrogel for Flexible Electronic Skin Strain Sensor. Journal of Materials Chemistry A, 2020.
Xia S, Song S, Jia F, et al. A flexible, adhesive and self-healable hydrogel-based wearable strain sensor for human motion and physiological signal monitoring. Journal of Materials Chemistry B, 2019, 7(30): 4638-4648.
Li Q, Li K, Fan H, et al. Reduced graphene oxide functionalized stretchable and multicolor electrothermal chromatic fibers[J]. Journal of Materials Chemistry C, 2017, 5(44): 11448-11453.
CHOI C, LEE J M, KIM S H, et al. Twistable and Stretchable Sandwich Structured Fiber for Wearable Sensors and Supercapacitors. Nano Letters, 2016, 16 (12): 7677-7684.
Dagdeviren C, Su Y, Joe P, et al. Conformable amplified lead zirconate titanate sensors with enhanced piezoelectric response for cutaneous pressure monitoring. Nature communications, 2014, 5(1): 1-10.
Zhang M, Wang C, Wang H, et al. Carbonized cotton fabric for high‐performance wearable strain sensors. Advanced Functional Materials, 2017, 27(2): 1604795.
CHEN W, GUI X, LIANG B, et al. Structural Engineering for High Sensitivity, Ultrathin PressureSensors Based on Wrinkled Graphene and Anodic Aluminum Oxide Membrane. Acs AppliedMaterials & Interfaces, 2017, 9 (28): 24111-24117.
AN B, MA Y, LI W, et al. Three-dimensional multi-recognition flexible wearable sensor viagraphene aerogel printing. Chemical Communications, 2016, 52 (73): 10948-10951.
LI J, XU B. Novel highly sensitive and wearable pressure sensors from conductive three-dimensional fabric structures. Smart Materials and Structures, 2015, 24 (12): 125022.
Seyedin S, Zhang P, Naebe M, et al. Textile strain sensors: a review of the fabrication technologies, performance evaluation and applications. Materials Horizons, 2019, 6(2): 219-249.
Wang J, Lu C, Zhang K. Textile‐Based Strain Sensor for Human Motion Detection. Energy & Environmental Materials, 2020, 3(1): 80-100.
Jian, M, Wang, C, Wang, Q, et al. Advanced carbon materials for flexible and wearable sensors. Science China Materials, 2017, 60(11), 1026-1062.
Wang L, Chen Y, Lin L, et al. Highly stretchable, anti-corrosive and wearable strain sensors based on the PDMS/CNTs decorated elastomer nanofiber composite. Chemical Engineering Journal, 2019, 362: 89-98.
Zheng Y, Li Y, Zhou Y, et al. High-Performance Wearable Strain Sensor Based on Graphene/Cotton Fabric with High Durability and Low Detection Limit. ACS Appl Mater Interfaces, 2020, 12(1):1474-1485.
Kim S R, Kim J H, Park J W. Wearable and transparent capacitive strain sensor with high sensitivity based on patterned Ag nanowire networks. ACS applied materials & interfaces, 2017, 9(31): 26407-26416.
Yang H, Xue T, Li F, et al. Graphene: diversified flexible 2D material for wearable vital signs monitoring. Advanced Materials Technologies, 2019, 4(2): 1800574.
Naguib M, Kurtoglu M, Presser V, et al. Two-dimensional nanocrystals produced by exfoliation of Ti₃AlC₂. Advanced Materials, 2011, 23(37):4248-4253.
Hasan M M, Hossain M M, Chowdhury H K. Two-dimensional mxene-based flexible nanostructures for functional nanodevices: a review. Journal of Materials Chemistry A, 2021.
Anasori B, Lukatskaya M R, Gogotsi Y. 2D metal carbides and nitrides (MXenes) for energy storage. Nature Reviews Materials, 2017, 2(2): 1-17.
Morales-García A, Calle-Vallejo F, Illas F. MXenes: new horizons in catalysis. ACS Catalysis, 2020, 10(22): 13487-13503.
Tang H, Hu Q, Zheng M, et al. MXene-2D layered electrode materials for energy storage. Progress in Natural Science: Materials International, 2018, 28(2): 133-147.
Sun S, Liao C, Hafez A M, et al. Two-dimensional MXenes for energy storage. Chemical Engineering Journal, 2018, 338: 27-45.
Yun T, Kim H, Iqbal A, et al. Electromagnetic shielding of monolayer MXene assemblies. Advanced Materials, 2020, 32(9): 1906769.
Zhang H, Wang L, Chen Q, et al. Preparation, mechanical and anti-friction performance of MXene/polymer composites. Materials & Design, 2016;92:682-689.
Wan Y J, Li X M, Zhu P L, et al. Lightweight, flexible MXene/polymer film with simultaneously excellent mechanical property and high-performance electromagnetic interference shielding. Composites Part A: Applied Science and Manufacturing, 2020, 130: 105764.
Hwang S K, Kang S M, Rethinasabapathy M, et al. MXene: an emerging two-dimensional layered material for removal of radioactive pollutants. Chemical Engineering Journal, 2020: 125428.
Jeon M, Jun B M, Kim S, et al. A review on MXene-based nanomaterials as adsorbents in aqueous solution. Chemosphere, 2020: 127781.
Sinha A, Zhao H, Huang Y, et al. MXene: An emerging material for sensing and biosensing. TrAC Trends in Analytical Chemistry, 2018, 105: 424-435.
Guo Y, Zhong M, Fang Z, et al. A wearable transient pressure sensor made with MXene nanosheets for sensitive broad-range human–machine interfacing. Nano letters, 2019, 19(2): 1143-1150.
Li H, Du Z. Preparation of a highly sensitive and stretchable strain sensor of MXene/silver nanocomposite-based yarn and wearable applications. ACS Appl Mater Interfaces, 2019,11(49):45930-45938.
Li T, Chen L, Yang X, et al. A flexible pressure sensor based on an MXene-textile network structure. Journal of Materials Chemistry C, 2019, 7(4): 1022-1027.
Liu R, Li J, Li M, et al. MXene-coated air-permeable pressure-sensing fabric for smart wear. ACS Appl Mater Interfaces, 2020, 12(41):46446-46454.
Li L, Zhou A, Xu L, et al. Synthesis of high pure Ti₃AlC₂ and Ti₂AlC powders from TiH₂ powders as Ti source by tube furnace. Journal of Wuhan University of Technology-Mater. Sci. Ed., 2013, 28(5): 882-887.
Liu F, Zhou A, Chen J, et al. Preparation of Ti₃C₂ and Ti₂C MXenes by fluoride salts etching and methane adsorptive properties. Applied Surface Science, 2017, 416: 781-789.
Cai G, Xu Z, Yang M, et al. Functionalization of cotton fabrics through thermal reduction of graphene oxide. Applied Surface Science, 2017, 393: 441-448.

PDF

Version 1

posted 05 Feb, 2021

You are reading this latest preprint version

High-Performance Wearable Strain Sensor Based on [email protected] Fabric with Network Structure

Status:

Version 1

Abstract

Figures

1. Introduction

2. Experimental

2.1. Preparation of MXene Ti₃C₂T_X and exfoliated d-Ti₃C₂T_X nanosheets

2.2. Fabrication of [email protected] Fabric pressure/strain sensors

2.3. Characterization

3. Results And Discussions

4. Conclusion

Declarations

Acknowledgements

References

Status:

Version 1

High-Performance Wearable Strain Sensor Based on [email protected] Fabric with Network Structure

Status:

Version 1

Abstract

Figures

1. Introduction

2. Experimental

2.1. Preparation of MXene Ti3C2TX and exfoliated d-Ti3C2TX nanosheets

2.2. Fabrication of [email protected] Fabric pressure/strain sensors

2.3. Characterization

3. Results And Discussions

4. Conclusion

Declarations

Acknowledgements

References

Status:

Version 1

2.1. Preparation of MXene Ti₃C₂T_X and exfoliated d-Ti₃C₂T_X nanosheets