CN112853743A - Preparation method and application of fabric strain sensor for monitoring physiological information of human body - Google Patents
Preparation method and application of fabric strain sensor for monitoring physiological information of human body Download PDFInfo
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- 239000004744 fabric Substances 0.000 title claims abstract description 85
- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 75
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 75
- 239000002048 multi walled nanotube Substances 0.000 claims abstract description 43
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 27
- 239000006185 dispersion Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 18
- 239000004677 Nylon Substances 0.000 claims description 16
- 229920002334 Spandex Polymers 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 229920001778 nylon Polymers 0.000 claims description 16
- 239000004759 spandex Substances 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 11
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 5
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
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- 239000011259 mixed solution Substances 0.000 claims description 3
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- 239000011248 coating agent Substances 0.000 claims description 2
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- 239000004952 Polyamide Substances 0.000 abstract 2
- 239000000835 fiber Substances 0.000 abstract 2
- 229920002647 polyamide Polymers 0.000 abstract 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000004814 polyurethane Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 6
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- 239000000463 material Substances 0.000 description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
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- 239000004753 textile Substances 0.000 description 2
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- 210000000707 wrist Anatomy 0.000 description 2
- -1 Polydimethylsiloxane Polymers 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229920005839 ecoflex® Polymers 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/681—Wristwatch-type devices
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/34—Polyamides
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/38—Polyurethanes
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- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
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- Biophysics (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
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Abstract
The invention discloses a preparation method of a fabric strain sensor for monitoring physiological information of a human body, wherein the fabric-based flexible strain sensor takes common Polyurethane (PU) fiber and Polyamide (PA) fiber as raw materials, a multi-walled carbon nanotube and reduced graphene oxide are adsorbed on the surface of a fabric by a cross-stretch dip-coating method to form a conductive layer so as to obtain a conductive fabric, then a lead is led out of the conductive fabric through conductive silver adhesive, and the preparation of the strain sensor is completed. The cross stretch dip-coating method adopts conductive materials with different sizes to be combined so as to improve the stability of the sensor and ensure that the sensor can still ensure good stability in a stretching state.
Description
The technical field is as follows:
the invention belongs to the field of intelligent textiles and flexible electronic elements, and particularly relates to a preparation method and application of a fabric strain sensor for monitoring human physiological information.
Technical background:
soft strain sensors capable of withstanding large strains are of great interest in various applications, such as wearable devices for monitoring physiological information of the human body, soft body robots for detecting the degree of deformation thereof. With the development of materials and manufacturing techniques, different measurement mechanisms such as capacitance, resistivity, piezoelectricity and inductance have been successfully applied to soft strain sensors. In particular, soft resistive strain sensors based on strain response have received much attention due to their ease of manufacture and low power consumption.
Generally, a soft resistive strain sensor is composed of two parts, one being a conductive film as a sensing part and the other being an elastic substrate as a supporting part. Thus, the deformation of the substrate changes the conductive path in the conductive film to induce a change in resistance. The materials for conventional elastomeric substrates are typically selected from Polydimethylsiloxane (PDMS), Ecoflex and thermoplastic elastomers (TPE).
Recently, strain sensors using fabric as an elastic substrate have also received a great deal of attention, showing advantages in various structures and strong adhesion of conductive nanomaterials compared to elastomer-based strain sensors. Furthermore, textile based strain sensors may provide better wearing comfort and are therefore more suitable for wearable sensing devices.
The invention content is as follows:
the invention aims to: aiming at the defects in the prior art, a preparation method and application of a fabric strain sensor for monitoring human physiological information are provided. The nylon spandex fabric is used as an elastic substrate, and the multiwalled carbon nanotube (MWCNT) and the reduced graphene oxide (rGO) provide conductive paths for the sensor, so that the linearity and the stability of the strain sensor can be effectively improved. Through the elastic substrate nylon spandex fabric receive outside contact force when, thereby its deformation will lead to the change of electrically conductive path to arouse resistance change, thereby realize the effective monitoring to outside contact force through monitoring resistance change.
In order to solve the problems of the flexible strain sensor prepared by the traditional method, the invention provides a preparation method of a fabric strain sensor for monitoring human physiological information, which comprises the following steps:
s1: pre-stretching the pre-treated nylon spandex fabric, and fixing the pre-stretched fabric on a glassware by using a transparent adhesive tape; soaking the stretched nylon spandex fabric in reduced graphene oxide dispersion liquid in an ultrasonic environment; soaking for 30 minutes, taking out and drying to obtain a reduced graphene oxide fabric;
s2: and (4) immersing the reduced graphene oxide fabric obtained in the step S1 into the multi-walled carbon nanotube dispersion liquid in the same way. After soaking for 30 minutes, taking out and drying to obtain the reduced graphene oxide/multi-walled carbon nanotube fabric;
s3: relaxing the graphene/multi-walled carbon nanotube fabric obtained in the step S2 to 30% strain, immersing the graphene/multi-walled carbon nanotube fabric into the reduced graphene oxide dispersion liquid again for 30 minutes, taking out the graphene/multi-walled carbon nanotube fabric and drying the graphene/multi-walled carbon nanotube fabric to obtain the reduced graphene oxide/reduced graphene oxide fabric;
s4: finally, obtaining the graphene/multi-walled carbon nanotube conductive fabric by releasing the graphene/multi-walled carbon nanotube conductive fabric to an initial state;
s5: based on the obtained graphene/multi-walled carbon nanotube composite conductive fabric, the reduced graphene oxide/multi-walled carbon nanotube/reduced graphene oxide fabric strain sensor can be obtained by coating conductive silver paste on the surface of the fabric and leading out a lead.
Further, the preprocessing method in step S1 is: and respectively putting the nylon spandex fabric into ethanol and deionized water for ultrasonic treatment, taking out and drying to obtain the pretreated nylon spandex fabric.
Further, the pre-stretched nylon spandex fabric in the step S1 has a pre-stretching strain degree of not more than 50%.
Further, the preparation method of the multi-walled carbon nanotube dispersion liquid in the step S2 is as follows: adding the multi-walled carbon nanotube powder into the TSiPD solution, carrying out ultrasonic treatment for 30 minutes at 40KHZ, and standing for 2 hours to obtain the multi-walled carbon nanotube dispersion liquid with the concentration of 2 mg/ml.
Further, the preparation method of the reduced graphene oxide dispersion liquid in steps S1 and S3 is as follows:
s11: adding graphene oxide powder into deionized water, and uniformly dispersing in a 40KHZ ultrasonic environment to obtain a 5mg/ml graphene oxide solution;
s12: adding a 50% hydrazine hydrate solution into the graphene oxide solution obtained in the step S11, wherein the ratio of the hydrazine hydrate solution to the graphene oxide solution is 1-1.5: 1, mixing in proportion, placing the mixed solution in a water bath, heating for 2 hours at 90 ℃, and carrying out hydrothermal reduction to prepare a reduced graphene oxide solution;
s13: and finally, mixing the reduced graphene oxide solution obtained in the step S12 with the TSiPD solution according to the ratio of 1: mixing the components in a ratio of 0.7-1, and performing ultrasonic treatment to prepare the reduced graphene oxide dispersion liquid.
The fabric strain sensor prepared based on the method is applied to monitoring of human physiological information.
Description of the drawings:
FIG. 1 is a flow chart of a method of making a fabric-based strain sensor of the present invention.
Fig. 2 is a flow chart of a method for preparing a reduced graphene oxide dispersion according to the present invention.
FIG. 3 is a flow chart of a method for preparing a multi-walled carbon nanotube dispersion according to the present invention.
Fig. 4 is a characterization image of the conductive fabric by electron microscope scanning.
Fig. 5 is a graph showing changes in relative resistance of the strain sensor when monitoring the pulse of the human body.
Has the advantages that:
the cross stretch dip coating method is to stretch and dip coat, so that the conductive network on the surface of the fabric can be shrunk and superposed each time of relaxation, and the conductive path is more abundant. The first dip coating of the graphene with small size is also to attach more conductive materials on the surface of the fabric, and the multi-walled carbon nanotube with larger size can provide certain stretchability. And the cross-stretching dip-coating method can further increase conductive materials and can also compensate path damage caused by stretching.
The specific implementation scheme is as follows:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1, the invention provides a method for preparing a fabric strain sensor for monitoring physiological information of a human body, which mainly comprises the following steps:
s1: pre-stretching the pre-treated nylon spandex fabric to 50% strain, and fixing the pre-stretched fabric on a glass ware by using a transparent adhesive tape. And soaking the stretched nylon spandex fabric in the reduced graphene oxide dispersion liquid in an ultrasonic environment. And after soaking for 30 minutes, taking out and drying to obtain the reduced graphene oxide fabric.
The pretreatment method comprises the following steps: and respectively putting the nylon spandex fabric into ethanol and deionized water for ultrasonic treatment, taking out and drying to obtain the pretreated nylon spandex fabric.
The preparation method of the reduced graphene oxide dispersion liquid is shown in fig. 2: adding graphene oxide powder into deionized water to prepare a 5mg/ml graphene oxide solution, and uniformly dispersing in a 40KHZ ultrasonic environment; a 50% hydrazine hydrate solution was added to the graphene oxide solution at a ratio of 1.2: 1, mixing in proportion, placing the mixed solution in a water bath, heating for 2 hours at 90 ℃, and carrying out hydrothermal reduction to prepare a reduced graphene oxide solution; and finally, mixing the reduced graphene oxide solution and the TSiPD solution according to the ratio of 1: 0.8 ratio and ultrasonic treatment to prepare reduced graphene oxide dispersion, wherein the graphene oxide powder (diameter: 0.5-5 μm, thickness: 0.8-1.2nm, purity: about 99%).
S2: the graphene fabric was immersed in the multi-walled carbon nanotube dispersion in the same way. And after soaking for 30 minutes, taking out and drying to obtain the reduced graphene oxide/multi-walled carbon nanotube fabric.
Wherein the multi-wall carbon nanotube dispersion liquid is shown in figure 3: adding the multi-walled carbon nanotube powder into the TSiPD solution, carrying out ultrasonic treatment for 30 minutes at 40KHZ, and standing for 2 hours to obtain the multi-walled carbon nanotube dispersion liquid with the concentration of 2 mg/ml. The material used by the multi-walled carbon nanotube dispersion liquid comprises multi-walled carbon nanotube powder (the outer diameter is 5-15nm, the length is 10-30 mu m, the purity is more than 95%, the SA is more than 200m2/g, the true density is 2.1g/cm3, and the EC is more than 100 s/cm).
S3: and (3) relaxing the graphene/multi-walled carbon nanotube fabric to 30% strain, immersing the graphene/multi-walled carbon nanotube fabric into the reduced graphene oxide dispersion liquid again for 30 minutes, taking out the graphene/multi-walled carbon nanotube fabric and drying the graphene/multi-walled carbon nanotube fabric to obtain the reduced graphene oxide/reduced graphene oxide fabric.
S4: finally, the conductive fabric is obtained by releasing to the initial state. According to the needs of actual conditions, the times of cross soaking and the strain degree of the fabric in each soaking can be automatically adjusted.
S5: based on the obtained conductive fabric, the surface of the fabric is coated with conductive silver paste, and a lead is led out, so that the reduced graphene oxide/multi-walled carbon nanotube/reduced graphene oxide fabric strain sensor can be obtained.
Example 2:
the surface morphology of the conductive fabric was characterized by Scanning Electron Microscopy (SEM), as shown in fig. 4. It can be seen that the reduced graphene oxide is uniformly coated on the fabric threads. The rectangular area in fig. 4(a) is enlarged in order to show the structure of the microfolded reduced graphene oxide. As shown in fig. 4(b), two micro-folded graphene layers resulting from two reduced graphene oxide impregnated coatings can be clearly distinguished. When the conductive fabric is stretched, relative sliding between the lower graphene layer and the upper graphene layer causes their overlapping area to decrease, resulting in an increase in contact resistance therebetween.
Example 3:
application of a fabric strain sensor for monitoring human physiological information is provided. The pulse of the human body is monitored so as to test the monitoring capability of the strain sensor on the physiological information of the human body. The radial artery is located on the thumb side of the wrist, and is a commonly used heart rate measuring method in clinical traditional Chinese medicine. Therefore, to simulate the actual application, we attached the strain sensor to the wrist radial artery with transparent tape. The waveform signal of the strain sensor within 3 seconds is shown in fig. 5. It can be seen that although the relative change in resistance is small, the maximum is 1.2% and there is no significant drift over four consecutive cycles. Therefore, the strain sensor shows good measurement stability for monitoring the physiological information of the human body.
Claims (6)
1. A method for preparing a fabric strain sensor for monitoring physiological information of a human body is characterized by comprising the following steps:
s1: pre-stretching the pre-treated nylon spandex fabric, and fixing the pre-stretched fabric on a glassware by using a transparent adhesive tape; soaking the stretched nylon spandex fabric in reduced graphene oxide dispersion liquid in an ultrasonic environment; soaking for 30 minutes, taking out and drying to obtain a reduced graphene oxide fabric;
s2: and (4) immersing the reduced graphene oxide fabric obtained in the step S1 into the multi-walled carbon nanotube dispersion liquid in the same way. After soaking for 30 minutes, taking out and drying to obtain the reduced graphene oxide/multi-walled carbon nanotube fabric;
s3: relaxing the graphene/multi-walled carbon nanotube fabric obtained in the step S2 to 30% strain, immersing the graphene/multi-walled carbon nanotube fabric into the reduced graphene oxide dispersion liquid again for 30 minutes, taking out the graphene/multi-walled carbon nanotube fabric and drying the graphene/multi-walled carbon nanotube fabric to obtain the reduced graphene oxide/reduced graphene oxide fabric;
s4: finally, the graphene/multi-walled carbon nanotube composite conductive fabric is obtained by releasing the graphene/multi-walled carbon nanotube composite conductive fabric to an initial state;
s5: based on the obtained graphene/multi-walled carbon nanotube composite conductive fabric, the reduced graphene oxide/multi-walled carbon nanotube/reduced graphene oxide fabric strain sensor can be obtained by coating conductive silver paste on the surface of the fabric and leading out a lead.
2. The method for preparing a fabric strain sensor for monitoring physiological information of a human body according to claim 1, wherein the preprocessing method in the step S1 is as follows: and respectively putting the nylon spandex fabric into ethanol and deionized water for ultrasonic treatment, taking out and drying to obtain the pretreated nylon spandex fabric.
3. The method for manufacturing a fabric strain sensor for monitoring physiological information of a human body as claimed in claim 1, wherein the pre-stretched nylon spandex fabric in step S1 has a pre-stretching strain degree of not more than 50%.
4. The method for preparing a fabric strain sensor for monitoring physiological information of a human body according to claim 1, wherein the method for preparing the multi-walled carbon nanotube dispersion in the step S2 comprises: adding the multi-walled carbon nanotube powder into the TSiPD solution, carrying out ultrasonic treatment for 30 minutes at 40KHZ, and standing for 2 hours to obtain the multi-walled carbon nanotube dispersion liquid with the concentration of 2 mg/ml.
5. The method for preparing a fabric strain sensor for monitoring physiological information of human body as claimed in claim 1, wherein the reduced graphene oxide dispersion solution prepared in steps S1 and S3 is prepared by:
s11: adding graphene oxide powder into deionized water, and uniformly dispersing in a 40KHZ ultrasonic environment to obtain a 5mg/ml graphene oxide solution;
s12: adding a 50% hydrazine hydrate solution into the graphene oxide solution obtained in the step S11, wherein the ratio of the hydrazine hydrate solution to the graphene oxide solution is 1-1.5: 1, mixing in proportion, placing the mixed solution in a water bath, heating for 2 hours at 90 ℃, and carrying out hydrothermal reduction to prepare a reduced graphene oxide solution;
s13: and finally, mixing the reduced graphene oxide solution obtained in the step S12 with the TSiPD solution according to the ratio of 1: mixing the components in a ratio of 0.7-1, and performing ultrasonic treatment to prepare the reduced graphene oxide dispersion liquid.
6. Use of a fabric strain sensor prepared according to the method of claims 1-5 for monitoring physiological information of a human body.
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Cited By (2)
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| CN113737523A (en) * | 2021-09-09 | 2021-12-03 | 天津工业大学 | Preparation method of high-strength flexible tension sensing fiber rope |
| CN115125728A (en) * | 2022-07-07 | 2022-09-30 | 武汉纺织大学 | Preparation method of polyurethane film loaded with redox graphene and carbon nano tubes |
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