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3D printed capacitive smart skin and its preparation method

A smart skin and 3D printing technology, applied in manufacturing, additive processing, etc., can solve the problems of complex hydrogel assembly structure, unfavorable large-scale production and application, difficult to process precise microstructure, etc., and achieve broad industrial application prospects , easy to mass-produce, and universally applicable

Inactive Publication Date: 2019-07-05
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high sensitivity of the reported ionic skin is mainly reflected in the higher pressure, at least under the pressure above 1 KPa, the capacitive response has a high sensitivity, while under the lower pressure, the capacitive response effect is weak.
In 2016, in "Natural Communications" (Nat. Commun. 2016, 7, 12316), it was reported that composite capacitive materials prepared by nanoparticle assemblies with special branched structures and hydrogel matrix can achieve higher sensitivity , even surpassing the function of human skin to realize the underwater acoustic perception effect, but the hydrogel assembly structure is relatively complicated, which is not conducive to the promotion and realization of large-scale production and application
However, the current 3D printing technology has limited applicable materials, and there are certain requirements for the rheological properties and curing effect of the material. It is difficult for ordinary hydrogel materials to process precise microstructures through 3D printing technology.

Method used

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  • 3D printed capacitive smart skin and its preparation method
  • 3D printed capacitive smart skin and its preparation method
  • 3D printed capacitive smart skin and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 1.5 mol∙L to 22 wt% sodium lauryl sulfate aqueous solution -1 of sodium chloride, and a total of 1 mol∙L was added to the obtained emulsion -1 The comonomers DMA and C18, in which the ratio of DMA and C18 monomers is 1:1, the polymerization reaction is co-initiated by ammonium persulfate and sodium metabisulfite at 55 °C, and the amount of ammonium persulfate is 0.79 mmol∙L -1 , the dosage of sodium metabisulfite is 1 mmol∙L -1 . The polymerization reaction time was 24 hours. The polymerized hydrogel can be 3D printed after melting. The specific printing parameters are: extrusion pressure 0.3 MPa, extrusion needle diameter 0.4 mm, extrusion temperature 45 °C, molding temperature 10 °C, printing speed 6 mm∙s -1 . Two layers of the same porous hydrogel ion-conducting layer were prepared respectively, and a layer of polyethylene film was embedded in the middle to construct a sandwich capacitive smart skin device.

[0023] figure 1 is a photograph of the printed...

Embodiment 2

[0027] Add 0.1 mol∙L to 1 wt% sodium lauryl sulfate aqueous solution -1 of sodium chloride, and a total of 1 mol∙L was added to the obtained emulsion -1 The comonomers DMA and C18, in which the ratio of DMA and C18 monomers is 2, the polymerization reaction is co-initiated by ammonium persulfate and sodium metabisulfite at 55 °C, and the amount of ammonium persulfate is 0.7 mmol∙L -1 , the dosage of sodium metabisulfite is 1 mmol∙L -1 . The polymerization reaction time was 15 hours. The polymerized hydrogel can be 3D printed after melting. The specific printing parameters are: extrusion pressure 0.7 MPa, extrusion needle diameter 0.01 mm, extrusion temperature 90 °C, molding temperature 80 °C, printing speed 10 mm∙s -1 . Two layers of the same porous hydrogel ion-conducting layer were prepared respectively, and a layer of polyethylene film was embedded in the middle to construct a sandwich capacitive smart skin device.

Embodiment 3

[0029] Add 3 mol∙L to 30 wt% sodium lauryl sulfate aqueous solution -1 of sodium chloride, and a total of 3 mol∙L was added to the obtained emulsion -1 Comonomers DMA and C18, the ratio of DMA and C18 monomers is 0.5, and the polymerization reaction is co-initiated by ammonium persulfate and sodium metabisulfite at 70 °C, and the amount of ammonium persulfate is 0.1 mmol∙L -1 , the dosage of sodium metabisulfite is 0.1 mmol∙L -1. The polymerization reaction time was 48 hours. The polymerized hydrogel can be 3D printed after melting. The specific printing parameters are: extrusion pressure 0.5 MPa, extrusion needle diameter 1 mm, extrusion temperature 50°C, molding temperature 20°C, printing speed 0.1 mm∙s -1 . Two layers of the same porous hydrogel ion-conducting layer were prepared respectively, and a layer of polystyrene film was embedded in the middle to construct a sandwich-type capacitive smart skin device.

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Abstract

The invention belongs to the technical field of functional materials, in particular to 3D printing capacitive intelligent skin and a preparation method thereof. According to the 3D printing capacitive intelligent skin and the preparation method thereof, a hydrogel material which can be molten is prepared through free radicals; the hydrogel can be further designed into bionic intelligent skin with high sensitivity through 3D printing. The bionic intelligent skin prepared by the preparation method is expected to be applied to the field of wearable intelligent equipment; a preparation process is simple in operation; the production cost is low. Compared with the intelligent skin material which is reported at present, the high-sensitivity bionic intelligent designed by the preparation method can be subjected to large-area printing and large-scale production preparation, and has a wide commercial application prospect.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a 3D printed capacitive smart skin and a preparation method thereof. Background technique [0002] In recent years, the research and development of bionic smart skin materials has received extensive attention. On the one hand, wearing bionic smart skin for the robot to achieve the effect of simulating human skin can make the robot perceive different temperature, humidity and touch stimuli, and better realize the effect of human-computer interaction; on the other hand, as a flexible wearable device for the human body, it can Record and monitor the healthy movement of the human body, and provide feedback results in time for reference. However, the materials and technologies currently used to prepare and produce bionic smart skin are still relatively limited. How to improve the sensitivity of bionic skin, prepare smart materials that are closer to human rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/10B33Y10/00B33Y70/00
CPCB33Y10/00B33Y70/00
Inventor 雷周玥王铨康武培怡
Owner FUDAN UNIV
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