CN109199339A - A kind of wearable flexibility temperature sensor and preparation method thereof for monitoring body temperature - Google Patents
A kind of wearable flexibility temperature sensor and preparation method thereof for monitoring body temperature Download PDFInfo
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- CN109199339A CN109199339A CN201811061762.7A CN201811061762A CN109199339A CN 109199339 A CN109199339 A CN 109199339A CN 201811061762 A CN201811061762 A CN 201811061762A CN 109199339 A CN109199339 A CN 109199339A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
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- 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
- A61B5/683—Means for maintaining contact with the body
- A61B5/6832—Means for maintaining contact with the body using adhesives
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Abstract
本发明公开了一种用于监测人体体温的可穿戴柔性温度传感器及其制备方法，其具有由可粘贴绷带‑中间温度敏感层‑柔性可透气膜构成的三明治结构，其中的中间温度敏感层是以聚偏氟乙烯为基体、以聚乙二醇为温度敏感材料、以石墨粉为导电填料，成膜获得。本发明的柔性温度传感器灵敏度高、检测效果好，具有良好的可穿戴性和良好的柔性，且具有良好的透气性能。
The invention discloses a wearable flexible temperature sensor for monitoring human body temperature and a preparation method thereof, which has a sandwich structure composed of an adhesive bandage-intermediate temperature sensitive layer-flexible breathable film, wherein the intermediate temperature sensitive layer is It is obtained by forming a film with polyvinylidene fluoride as the matrix, polyethylene glycol as the temperature sensitive material, and graphite powder as the conductive filler. The flexible temperature sensor of the invention has high sensitivity, good detection effect, good wearability, good flexibility, and good air permeability.
Description
Technical field
The invention belongs to flexibility temperature sensor fields, and in particular to a kind of wearable flexibility of sandwich structure breathable
Temperature sensor and preparation method thereof is used for body temperature monitoring.
Background technique
Body temperature is one of most important physiological parameter in physiology, closely related with the chemical reaction in physiological system, is
The important indicator for determining human health and disease is usually determined whether to start the basis for the treatment of.Precise measurement soft tissue part
Temperature change (regardless of whether being to move on a large scale), for understand the complicated health status of the thermal phenomenon of body temperature balance, assessment with
And a possibility that further providing for building intelligent medical and medical system, is most important.Therefore, accurate to the temperature curve of human body
The detection value and meaning that with record there is certain depth to excavate.
In traditional medical treatment and nursing, skin thermal imaging is by the medical infrared thermal imaging system for aerial image or to be used for
The mercurial thermometer of body temperature is measured to realize.Medical infrared thermal imaging system can provide superhigh precision and high-resolution in imaging
Rate, but disadvantage is with high costs and needs immobilized patients, and immovable, flexibility is poor.As for mercurial thermometer, for new life
It is inconvenient for baby or anaesthesia patient, because mercurial thermometer steadily cannot be maintained at armpit as requested by them
Under.Importantly, mercurial thermometer is more easily damaged, and the mercury leaked is toxic, pollutes the environment.Therefore, as can wear
The temperature sensor of wearing electronic equipment should it is soft, flexibly, it is high sensitivity, good biocompatibility, light-weight, be pasted on naturally
Skin surface and have sufficiently high resolution ratio, this is very important for health care and medical applications.
In the past few decades, people are made that many in terms of the temperature sensor with flexible, biocompatibility
Effort.Bao et al. develops a kind of temperature sensor based on Ni particle filled polymer composite, the temperature sensor by
The binary polymer composite material composition of nickel particle filling, with polyethylene (PE) and polyethylene oxide (PEO) for matrix, for supervising
Survey body temperature.But still there are some problems in such method: on the one hand, the sensing prepared using the method for high temperature hot pressing
Device has lower flexibility；On the other hand, the repeatability of the sensor is also not highly desirable, is unfavorable for being used repeatedly.Separately
Outside, the temperature that Salvatore et al. develops a kind of biodegradable and alterable height shape based on Mg film and ecoflex passes
Sensor, the sensor can keep the mechanical stability of height, and when equipment is wrinkled, folded and be stretched to 10%, performance is not
It will receive influence.But its rigidity is larger and resolution ratio is inadequate, can not be suitable for the application of flexible wearable device.Yokata et al.
Devise oversoul based on graphite packing copolymer temperature sensor living, resistivity can be within the temperature range of only 5.0 DEG C
Show the variation of 6 orders of magnitude or more.But this sensor is only capable of changing within the temperature range of 5 DEG C, and highest is sensitive
Temperature is only 34 DEG C, does not meet the temperature range of body temperature, is unsuitable for measuring body temperature.
Although flexibility temperature sensor has been achieved with greater advance, but the temperature sensor for measuring body temperature is also
It is to come with some shortcomings: is suitable for the suitable temperature sensitive range and sufficiently high resolution ratio that body temperature measures, lacks
Weary preferable flexible and portability, is not easy to stick with human skin.Currently, there are no a kind of temperature models at 34 DEG C to 42 DEG C
In enclosing, it is used to measure the wearable flexibility temperature sensor of body temperature with high-resolution, breathable.
Summary of the invention
To avoid above-mentioned existing deficiencies in the technology, the present invention is based on positive temperature effect principles, propose one
Wearable flexibility temperature sensor and preparation method thereof of the kind for monitoring body temperature, it is intended to solve existing body temperature temperature sensing
Device is difficult to the problem of human epidermal sticks, is unable to the monitoring body temperature of long-term portable, and reinforces temperature sensor as body
The ability of temperature detector survey device.
The present invention solves technical problem, adopts the following technical scheme that
It is a kind of for monitoring the wearable flexibility temperature sensor of body temperature, it is characterized in that: the wearable flexibility
Temperature sensor is sandwich structure, is to be provided with medium temperature in the Pasting bandage using Pasting bandage as substrate
Sensitive layer covers flexible ventilative film on the medium temperature sensitive layer；
The medium temperature sensitive layer be using Kynoar as matrix, using polyethylene glycol as temperature-sensitive material, with stone
Ink powder is conductive filler, and film forming obtains.
Wearable flexibility temperature sensor of the invention is based on positive temperature effect principle: as temperature increases, polyethylene glycol
Gradually become amorphous state from crystalline state, lead to volume expansion, dilutes the volume fraction for the graphite powder being present in sensitive layer, from
And the resistance of temperature sensor is increased；When the temperature decreases, polyethylene glycol is just recrystallized from amorphous state, volume contraction,
Indigenous graphite powder causes the graphite composite powder fraction in sensitive layer to increase, so that resistance reduces.
Further, being added in the medium temperature sensitive layer has kayexalate, for improving polyethylene glycol
Crystallinity.In the medium temperature sensitive layer, hydrogen bond is easily formed between polyethylene glycol and Kynoar, influences poly- second two
The crystallinity of alcohol, to influence the sensitivity of sensor.And kayexalate is added in the present invention, can be allowed to and poly- second two
Alcohol preferentially forms hydrogen bond, prevent Kynoar greatly increases polyethylene glycol from forming hydrogen bond with polyethylene glycol in this way
Crystallinity, the high duplication for improving the sensitivity of sensor, while it being made to have 200 times and the fast response time for reaching 30s
With excellent interference free performance.
Further, the molecular weight of the polyethylene glycol is 1500.Wearable flexibility temperature sensor of the invention, design
It is detected for body temperature, therefore selecting molecular weight is 1500 polyethylene glycol, temperature sensitive range and body temperature change
Range is consistent, is 34 DEG C to 42 DEG C.
The preparation method of the wearable flexibility temperature sensor of the present invention, includes the following steps:
Step 1, preparation medium temperature sensitive layer
11, polyethylene glycol styrene sulfonic acid sodium solution is prepared
0.6g polyethylene glycol and 2~4mL kayexalate are weighed, is added in 20~30mL deionized water, is stirred
To dissolution, polyethylene glycol styrene sulfonic acid sodium solution is obtained.
12, the composite solution of graphite powder is prepared
0.6~0.9g graphite powder is added in the polyethylene glycol styrene sulfonic acid sodium solution, is stirred 30 minutes
Afterwards, re-ultrasonic dispersion 30 minutes, obtain mixed solution；
13, polyethylene glycol/Kynoar/graphite mixture is prepared
0.6~0.8g Kynoar and 10~30mL n,N-Dimethylformamide are added in the mixed solution,
Magnetic agitation obtains film slurry to grume at 200 DEG C；
14, flexible temperature sensitive is prepared
The film slurry spin coater spin-coating film is put into vacuum oven, it is 4 hours dry at 60 DEG C, then
It cuts to required size, obtains medium temperature sensitive layer；
Step 2, wearable flexibility temperature sensor
The medium temperature sensitive layer is pasted and fixed on Pasting bandage, area is then greater than the intermediate temperature again
The ventilative film of flexibility of degree sensitive layer area is pasted and fixed on Pasting bandage, and covers the medium temperature sensitive layer；Most
Release paper is pasted on the Pasting bandage again afterwards to be protected, and wearable flexibility temperature sensor is obtained.
Compared with the prior art, the beneficial effects of the present invention are embodied in:
1, flexibility temperature sensor of the invention, using Pasting bandage-medium temperature sensitive layer-ventilative film of flexibility
Sandwich structure: high sensitivity, detection effect are good；It, can be with human epidermal with good wearable property and good flexibility
Perfection sticks, and can substitute traditional rigid temperature meter in the fields such as medicine to monitor body temperature；With good
Gas performance makes it that can carry out long-term body temperature prison to specific groups such as old man, child, paralysed patients with long-term skin contact
It surveys.
2, flexibility temperature sensor of the invention, joined kayexalate during the preparation process, greatly improve
The sensitivity of sensor, compared with the temperature sensor that kayexalate preparation is not added, resistance change rate increase is about
One times.
3, flexibility temperature sensor stability of the invention is good, under the influence of the external environments such as bending, water, wind, sensing
The performance of device is able to maintain stabilization.
4, flexibility temperature sensor raw materials of the invention are cheap, and production method is simple, and it is raw to be easy to batch
It produces.
Detailed description of the invention
Fig. 1 is the sandwich structure schematic diagram of wearable flexibility temperature sensor of the present invention for monitoring body temperature,
Figure label: 1 is Pasting bandage, and 2 be medium temperature sensitive layer, and 3 be flexible ventilative film.
Fig. 2 is the pictorial diagram of wearable flexibility temperature sensor of the present invention for monitoring body temperature.
Fig. 3 (a), (b) are that the medium temperature of wearable flexibility temperature sensor of the present invention for monitoring body temperature is quick
Feel scanning electron microscope diagram of the layer surface under different amplification.
Fig. 4 is the present invention for monitoring the wearable flexibility temperature sensor and non-plus polystyrene sulfonic acid of body temperature
The repeated comparison diagram of the sensor of sodium.
Fig. 5 is the slight temperature variation detection of wearable flexibility temperature sensor of the present invention for monitoring body temperature
Figure.
Fig. 6 is the response time figure of wearable flexibility temperature sensor of the present invention for monitoring body temperature.
Fig. 7 is the varying environment stability diagram of wearable flexibility temperature sensor of the present invention for monitoring body temperature
Specific embodiment
It elaborates with reference to the accompanying drawing to the embodiment of the present invention, following embodiments are being with technical solution of the present invention
Under the premise of implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment 1
As shown in Figure 1, the wearable flexibility temperature sensor of the present embodiment is sandwich structure, it is with Pasting bandage 1
For substrate, medium temperature sensitive layer 2 is provided in Pasting bandage, covered on medium temperature sensitive layer 2 it is flexible can be saturating
Air film 3；Wherein, medium temperature sensitive layer be using Kynoar as matrix, using polyethylene glycol as temperature-sensitive material, with graphite
Powder is conductive filler, and film forming obtains.
The preparation step of the present embodiment flexibility temperature sensor is as follows:
Step 1, preparation medium temperature sensitive layer
11, polyethylene glycol styrene sulfonic acid sodium solution is prepared
0.6g polyethylene glycol and 2mL kayexalate are weighed, is added in 20mL deionized water, stirring to dissolution,
Obtain polyethylene glycol styrene sulfonic acid sodium solution.
12, the composite solution of graphite powder is prepared
0.8g graphite powder is added in polyethylene glycol styrene sulfonic acid sodium solution, after stirring 30min, then ultrasound point
It dissipates 30 minutes, obtains mixed solution；
13, polyethylene glycol/Kynoar/graphite mixture is prepared
0.6g molecular weight is added to mixed solution for 1500 Kynoar and 10mL N,N-dimethylformamide
In, magnetic agitation obtains film slurry to grume at 200 DEG C；
14, flexible temperature sensitive is prepared
Film slurry spin coater spin-coating film is put into vacuum oven, dry 4 hours at 60 DEG C, then cut to
Required size obtains medium temperature sensitive layer；
Step 2, wearable flexibility temperature sensor
Medium temperature sensitive layer is pasted and fixed on Pasting bandage, area is then greater than medium temperature sensitive layer again
Area the ventilative film of flexibility (0.5mm is thick, and purchase is pasted and fixed on Pasting bandage from Opsite, Smith&Nephew),
And cover medium temperature sensitive layer；Release paper is finally pasted on Pasting bandage again to be protected, and wearable flexibility is obtained
Temperature sensor, pictorial diagram are as shown in Figure 2.
The pictorial diagram of flexibility temperature sensor prepared by the present invention is as shown in Figure 2.
Fig. 3 (a), (b) are scanning of the medium temperature sensitivity layer surface under different amplification obtained by the present embodiment
Electron microscope picture.From Fig. 3 (a) it can be seen that polyethylene glycol, Kynoar and graphite are uniformly distributed on surface.Fig. 3 (b)
Middle A is polyethylene glycol, B is Kynoar, it can be seen that the two objectionable intermingling, is still presented the state mutually separated.
It is first quick in medium temperature when preparing sensor for the performance for testing flexibility temperature sensor obtained by the present embodiment
Feel layer two sides coating conductive silver paste and extraction wire, then covers flexible ventilative film.Then to the repeatability of gained sample, resolution
Rate, response time and varying environment stability carry out dependence test.
Fig. 4 is the repeatability figure (Fig. 4 (b)) of wearable flexibility temperature sensor obtained by the present embodiment, while not to be added
(when preparation, difference is only that in step 11 is added without polystyrolsulfon acid to temperature sensor prepared by kayexalate
Sodium) (Fig. 4 (a)) is compared, it can be seen from the figure that the temperature sensor being added after kayexalate improves has
Bigger temperature sensitive properties, in same range of temperature, resistance variations are bigger, largely improve sensor
Sensitivity.It heats up and tests by 200 repetitions, sensor still keeps good temperature sensitivity energy, shows sensor
Repeatability it is good.
For the high-resolution for characterizing flexibility temperature sensor obtained by the present embodiment, Fig. 5 is slight temperature variation detection figure, when
When people blows to the sensor, sensor resistance changes, and shows that the flexibility temperature sensor is able to detect that faint temperature
The variation of degree possesses high temperature sensitivity.
Fig. 6 is the response time figure of flexibility temperature sensor obtained by the present embodiment, it can be seen from the figure that the sensor
Response time is only 30 seconds, more much faster up to 5 minutes response times than traditional mercurial thermometer, is expected to substitute traditional temperature
Degree meter obtains application in medical industry.
For the practicability for characterizing flexibility temperature sensor obtained by the present embodiment, sensor is tested respectively under various circumstances
Stability, in which: the test under water environment is carried out in the water for be immersed directly in sample 25 DEG C；The survey being bent under environment
Examination is by sample bent to angle as shown in the figure, which is greater than the angle after sample sticks in human body arbitrary surface skin
Degree；Test under wind environment is to carry out adding wind to sample with the power of 2.5W by fan, and wind-force is greater than the nature in environment
Wind；It is compared simultaneously with laying flat test.Fig. 7 is stability test as a result, it can be seen that water, bending, wind are to sensing
The performance of device does not influence significantly, and therefore, during monitoring body temperature, flexibility temperature sensor of the invention will not be by
The influence of natural wind into wet environment, human body contoured skin and environment.As can be seen that flexible temperature sensing obtained by the present embodiment
Device all has good stability in different external environment, can be able in medical industry for it further using making
Guarantee.
The above is only exemplary embodiment of the present invention, are not intended to limit the invention, all in spirit of the invention
With any modifications, equivalent replacements, and improvements made within principle etc., should all be included in the protection scope of the present invention.
Claims (5)
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Cited By (4)
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| CN113973494A (en) * | 2019-05-23 | 2022-01-25 | 活跃骨科技术服务有限公司 | Sensor layer for determining a temperature profile on a skin surface, auxiliary means for wearing on a skin surface, method for producing an auxiliary means and method for determining a relative temperature difference on a skin surface |
| CN111286185A (en) * | 2020-02-28 | 2020-06-16 | 苏州珀力玛高分子材料有限公司 | Temperature-change dimming material, color-change glass containing temperature-change dimming material and preparation method of color-change glass |
| CN112857605A (en) * | 2021-01-05 | 2021-05-28 | 电子科技大学 | Temperature sensor, application thereof and method for preparing temperature sensing module |
| CN112857605B (en) * | 2021-01-05 | 2021-12-31 | 电子科技大学 | Temperature sensor, application thereof and method for preparing temperature sensing module |
| CN114479662A (en) * | 2022-01-25 | 2022-05-13 | 浙江水利水电学院 | Preparation method of flexible wearable film temperature sensor of graphene phase change capsule |
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