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Full-silk-fibroin-based conductive gel sensor and preparation method thereof

A conductive gel and silk fibroin technology, applied in the field of wearable sensors, can solve the problems of high manufacturing cost of a single device, complex sensor preparation process, and difficulty in integrating sensors with multiple functions, and achieves good fit and conductivity. The effect of preserving solubility, high adhesion and biocompatibility

Inactive Publication Date: 2021-12-07
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a full silk fibroin-based conductive gel sensor and its preparation method and its application in the field of intelligent wearable sensors, so as to overcome the complicated preparation process of the existing sensor, the high manufacturing cost of a single device, and the multi-functionality of the sensor. Defects such as difficulty in integration

Method used

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  • Full-silk-fibroin-based conductive gel sensor and preparation method thereof

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Embodiment 1

[0034] Add the degummed silk fiber with a mass fraction of 5% to the acid addition system, and the mass fraction of the carbonized silk fiber is 0.1 wt%. After stirring, ultrasonication, and centrifugation to remove insoluble impurities, it can be added to the silk fiber / carbonized silk fiber. A mixed acid solution of formic acid / calcium chloride. Immediately afterwards, slowly pour the above acid solution onto the bottom of the glass dish in the fume hood. After the formic acid evaporates, an acid gel will form at the bottom. Gel, also named carbonized silk gel. It should be noted that residual traces of formic acid may cause skin irritation and corrosion. For personal safety, the corresponding follow-up operations should be performed after the formic acid is completely volatilized. For example, when the carbonized silk gel is formed, it can be peeled off from the bottom of the glass dish (for details, refer to Figure 6 ), prepare carbonized silk gel, be embodiment 1.

Embodiment 2

[0036] The degummed silk fiber with a mass fraction of 5% was added to the acid addition system, the mass fraction of carbonized silk fiber was 0.2 wt%, and the carbonized silk gel was prepared according to the preparation steps in Example 1, which was recorded as Example 2. Further, embodiment 2 can be improved as a conductive gel used as an ECG substitute electrode for acquiring electrocardiographic signals, so as to realize accurate measurement of electrocardiographic signals after human rest or exercise.

Embodiment 3

[0038] Degummed silk fibers with a mass fraction of 8% were added to the acid addition system, and the mass fraction of carbonized silk fibers was 0.5wt%. Carbonized silk gel was prepared according to the preparation steps in Example 1, which was recorded as Example 3. Furthermore, Example 3 can be prepared by VHB sandwich packaging to obtain a gel sensor for temperature sensing, which realizes a sensitive response to external temperature changes under non-contact conditions, and early warning of potential dangers around people.

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Abstract

The invention belongs to the technical field of wearable sensors, and particularly relates to a full-silk-fibroin-based conductive gel sensor and a preparation method thereof. According to the preparation method, firstly, carbonized silk fibers with good dispersing performance and high conductivity are prepared through a gradient carbonization procedure, and then the conductive full-silk-fibroin-based gel is prepared by combining the carbonized silk fibers and degummed silk fibers; the preparation process is rapid and efficient, prepared gel is stable in performance, and large-scale preparation can be carried out; and the novel silk protein gel sensor is obtained through sandwich type packaging of a VHB adhesive tape. The silk protein gel sensor can be used for realizing temperature sensing, electrocardiosignal measurement and auxiliary braille recognition, and shows excellent stability, safety, accuracy and high efficiency. The silk protein gel sensor can also be used for individual health monitoring to realize contact perception and non-contact perception, and is expected to become a next-generation wearable flexible electronic product.

Description

technical field [0001] The invention belongs to the technical field of wearable sensors, and in particular relates to a full silk fibroin-based conductive gel sensor and its preparation method and application. Background technique [0002] In recent decades, with the development opportunities brought about by the new round of scientific and technological revolution and industrial transformation, global scientific and technological innovation has become unprecedentedly intensive and active, showing an explosive and rapid development trend. Among them, the new generation of information technology represented by big data management and analysis, cloud computing, blockchain, Internet of Things (IoT), artificial intelligence (AI), and fifth-generation mobile communication technology (5G) is changing with each passing day. Social production and daily life have brought a comprehensive and far-reaching impact. Nowadays, all kinds of smart wearable devices have gradually entered the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L89/00C08K7/06
CPCC08J3/075C08J2389/00C08K7/06C08K2201/001
Inventor 程宝昌冯嘉春武培怡
Owner FUDAN UNIV
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