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A flexible temperature sensor based on pectin/xanthan gum blend film and its preparation method

A technology of temperature sensor and xanthan gum, which is applied in the field of sensors, can solve the problems that flexible sensors are not biodegradable, not suitable for human body temperature detection, and difficult to obtain raw materials, etc., and achieve real-time monitoring of human body temperature changes, simple structure, and low price.

Active Publication Date: 2019-07-30
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some other sensors are more flexible and soft, and can work in a wider temperature range, in many cases, the sensitivity is not high, the response time is too long, and the preparation process is cumbersome, the raw materials are not easy to obtain, the prepared flexible sensor is not biodegradable, and Opaque, not suitable for human body temperature detection

Method used

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  • A flexible temperature sensor based on pectin/xanthan gum blend film and its preparation method
  • A flexible temperature sensor based on pectin/xanthan gum blend film and its preparation method
  • A flexible temperature sensor based on pectin/xanthan gum blend film and its preparation method

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Experimental program
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preparation example Construction

[0026] The preparation method of the flexible temperature sensor based on the pectin / xanthan gum blend film of the present invention comprises the following steps:

[0027] Step 1, preparing pectin sol.

[0028] Specifically, the pectin powder was dissolved in deionized water at 80° C. and stirred at a speed of 800 rpm until a uniform pectin sol with a concentration of 2% w / v was obtained.

[0029] Step 2, preparing a blend system solution.

[0030] In one embodiment, xanthan gum at a concentration of 0.3% w / v and 0.6 mL of glycerol are added to the pectin sol, and stirred at a speed of 1000 rpm to form a uniform blend system solution.

[0031] Step 3, preparing the mixed system sol.

[0032] In one embodiment, a 32 mM calcium chloride solution is configured in deionized water at a temperature of 80° C., wherein R=[Ca 2+ ] / 2[COO - ]=1, R is the molar ratio, the calcium chloride solution is added dropwise in the blending system solution by titration, and is stirred at a spe...

Embodiment 1

[0051] Fabrication of pectin / xanthan gum blend film flexible temperature sensor and testing of its sensing characteristics

[0052] The difference between the present embodiment one and the comparative example one is that before adding sodium chloride solution in step 2, add 0.3% (w / v) xanthan gum and plasticizer glycerin 0.6mL, stirring speed is 1000rpm, the rest The steps are the same as in Comparative Example 1.

[0053] The responsiveness performance reference of this embodiment figure 2 , figure 2 It is the time response curve of the flexible temperature sensor based on the pectin / xanthan gum blend film in the present invention. like figure 2 As shown, it can be seen that its temperature response is high and its performance is good.

[0054] For the results of the performance tests of the above two examples, please continue to refer to image 3 , image 3 It is a sensitivity comparison chart of the flexible temperature sensor based on the pectin / xanthan gum blend...

Embodiment 2

[0056] Fabrication of pectin / xanthan gum blend film flexible temperature sensor and testing of its sensing characteristics

[0057] The difference between the second embodiment and the first embodiment is that the thickness of the flexible substrate layer prepared in step 1 is about 550 μm, the thickness of the flexible temperature-sensitive layer prepared in step 2 is 90 μm, and the rest of the steps are the same as in the first embodiment .

[0058] The response performance of this embodiment is similar to that of the first embodiment: the temperature response is very high and the performance is good.

[0059] Those of ordinary skill in the art should be able to understand that one of the characteristics or purposes of the present invention is: the temperature sensor uses a pectin film as a temperature-sensitive material, and xanthan gum is added to improve the flexibility of the film and increase its responsiveness; PDMS is used as a flexible transparent substrate with upp...

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Abstract

The invention relates to a flexible temperature sensor and a preparation method thereof. The temperature sensor uses pectin film as the temperature-sensitive material, and xanthan gum is added to improve the flexibility and responsivity of the film; PDMS is used as the flexible transparent substrate of the upper and lower layers; its electrodes are prepared by sputtering, and the electric shock can be made of carbon. Tape or copper foil leads. The pectin / xanthan gum blended film temperature sensor provided by the invention has simple structure, high sensitivity, flexibility and good biocompatibility, and has very good applications in the fields of electronic skin and human body temperature measurement, and the raw materials are easy to obtain. Available for mass production.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a flexible temperature sensor based on a pectin / xanthan gum blend film and a preparation method thereof. Background technique [0002] In recent years, due to the great potential of wearable electronic skin applications, flexible sensors that can effectively detect various stimuli related to specific environments or biological species have been extensively studied, so the development of new flexible and miniaturized electronic skin sensors is beneficial to human health. , Real-time monitoring of environmental dynamics has important scientific significance. A number of research groups around the world are currently developing flexible electronic skins for prosthetics that could help replicate our human sensory abilities. Artificial heat-sensitive skin, nature's most sensitive heat detector, could help prosthetic and robotic extremities detect small changes in temperature, allowing prosthet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K13/00C08J5/18C08L5/06C08L5/00C08K5/053
Inventor 袁宁一郝利丁建宁
Owner CHANGZHOU UNIV
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