阅读说明：本技术 一种微针贴片导电电极 (Conductive electrode of microneedle patch ) 是由 朱向阳 孙瑜 于 2021-07-28 设计创作，主要内容包括：本发明公开了一种微针贴片导电电极,包括：导电层,所述导电层的底端固定连接有高分子微针结构,所述高分子微针结构设置为微针贴片,所述微针贴片中的微针内部开设有中空通道。本发明的有益效果是：本发明利用导电层作为电极层收集信号,而且由于导电层以硅胶为基材,该电极可以附着于柔性硅胶的基材上,进而可以更好地贴附皮肤；本发明利用微针贴片进行导电增强,并且将其复合到柔性材料的基材上,可以有效减少噪音,微针因为其针头一般只有几十个微米厚度,比头发丝还细,所以可以无损地进入表皮而不接触神经,在微针贴片拿走时,表皮可以无损闭合,可以透过表皮干扰,更接近神经,增强信号收集。(The invention discloses a conductive electrode of a micro-needle patch, which comprises: the conducting layer, the bottom fixedly connected with polymer micropin structure of conducting layer, polymer micropin structure sets up to the micropin paster, hollow channel has been seted up to micropin inside in the micropin paster. The invention has the beneficial effects that: the conducting layer is used as the electrode layer to collect signals, and the conducting layer takes the silica gel as the base material, so that the electrode can be attached to the base material of the flexible silica gel, and the skin can be better attached; the micro-needle patch is used for conducting enhancement, and is compounded on the base material of the flexible material, so that noise can be effectively reduced, the needle head of the micro-needle is generally only dozens of microns in thickness and thinner than hair, so that the micro-needle can enter the epidermis without damage and is not contacted with nerves, when the micro-needle patch is taken away, the epidermis can be closed without damage, can be interfered by the epidermis and is closer to the nerves, and signal collection is enhanced.)

1. A microneedle patch conductive electrode, comprising:

the conductive layer (1), the bottom fixedly connected with polymer micropin structure (2) of conductive layer (1).

2. A microneedle patch conductive electrode according to claim 1, wherein: the high-molecular microneedle structure (2) is arranged as a microneedle patch, and a hollow channel is formed in the interior of a microneedle in the microneedle patch.

3. A microneedle patch conductive electrode according to claim 1, wherein: the conductive layer (1) is prepared from uniformly mixed CNT/PDMS, and the conductive layer (1) is arranged inside the hollow channel of the microneedle.

4. A microneedle patch conductive electrode according to claim 1, wherein: the conductive layer (1) is prepared from a conductive material and a conductive base material, wherein the conductive material comprises Carbon Nano Tubes (CNT), graphene, conductive high Polymers (PEDOT), Ag/AgCl and Au, and the conductive base material comprises PDMS, silica gel, TPE and PET.

5. A microneedle patch conductive electrode according to claim 1, wherein: the material of the high-molecular microneedle structure (2) comprises:

metal: comprises nickel and titanium;

inorganic substances: including silicon, silicon dioxide, ceramics;

high polymer material: PMMA, PC, PP, PE;

water-soluble polymer: PU;

biodegradable material: PLA, PGA, PBAT, PHA.

6. A microneedle patch conductive electrode according to claim 1, wherein: the preparation method of the conducting layer (1) and the high-molecular microneedle structure (2) mainly comprises the following steps:

the method comprises the following steps: manufacturing a hollow microneedle patch;

step two: preparing a conductive material and a conductive base material into conductive slurry;

step three: coating and pressing the conductive slurry into the microneedle patch;

step four: and curing and molding the conductive slurry.

Technical Field

The invention relates to a conductive electrode, in particular to a micro-needle patch conductive electrode, and belongs to the technical field of flexible electronics.

Background

At present, the field of flexible electronics has been widely applied, and particularly, flexible wearable devices are gradually popular recently, so that the application of flexible materials is further expanded. However, how to better manufacture flexible electrodes that can conform to the skin has been an industry challenge. The traditional Ag/AgCl method is hard, cannot form perfect fit with skin, and causes high signal noise due to electrode friction in the motion process. The general flexible electrode is made of materials similar to carbon nanotubes or organic conductive materials, but relatively speaking, the resistance is easy to change in the process of stretching and deforming the flexible material, so that the output signal noise is also relatively large. In order to better solve the problem that the flexible electrode is attached to the skin. The present invention proposes to incorporate flexible electrodes onto current microneedle patch technologies.

Disclosure of Invention

An object of the present invention is to provide a microneedle patch conductive electrode in order to solve the above problems.

The invention achieves the above object by the following technical scheme, a microneedle patch conductive electrode, comprising:

the bottom fixedly connected with polymer micropin structure of conducting layer.

Preferably, the polymer microneedle structure is a microneedle patch, and a hollow channel is formed in a microneedle in the microneedle patch.

Preferably, the conductive layer is uniformly mixed CNT/PDMS, and the conductive layer is disposed inside the hollow channel of the microneedle.

Preferably, the conductive layer is prepared from a conductive material and a conductive base material, the conductive material comprises carbon nano tube CNT, graphene, conductive polymer PEDOT, Ag/AgCl and Au, and the conductive base material comprises PDMS, silica gel, TPE and PET.

Preferably, the material of the high molecular microneedle structure includes:

metal: comprises nickel and titanium;

inorganic substances: including silicon, silicon dioxide, ceramics;

high polymer material: such as PMMA, PC, PP, PE;

water-soluble polymer: such as a PU;

biodegradable material: such as PLA, PGA, PBAT, PHA.

Preferably, the preparation method of the conductive layer and the polymer microneedle structure mainly comprises the following steps:

the method comprises the following steps: manufacturing a hollow microneedle patch;

step two: preparing conductive slurry from a conductive material (2-50%) and a conductive base material;

step three: coating and pressing the conductive slurry into the microneedle patch;

step four: and curing and molding the conductive slurry.

The invention has the beneficial effects that:

firstly, the invention utilizes the conducting layer as an electrode layer to collect signals, and because the conducting layer takes silica gel as a substrate, the electrode can be attached to the substrate of the flexible silica gel, thereby being better attached to the skin.

The micro-needle patch is used for conducting enhancement, and is compounded on the base material of the flexible material, so that noise can be effectively reduced, the needle head of the micro-needle is generally only dozens of microns in thickness and thinner than hair, so that the micro-needle can enter the epidermis without damage and is not contacted with nerves, when the micro-needle patch is taken away, the epidermis can be closed without damage, can penetrate through epidermis interference and is closer to the nerves, and signal collection is enhanced.

Drawings

Fig. 1 is a schematic view of a microneedle patch structure according to the present invention.

In the figure: 1. a conductive layer; 2. a polymeric microneedle structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a conductive electrode of a microneedle patch includes:

the bottom end of the conducting layer is fixedly connected with a high-molecular microneedle structure.

As a technical optimization scheme of the invention, the high-molecular microneedle structure is arranged as a microneedle patch, and a hollow channel is arranged inside a microneedle in the microneedle patch.

As a technical optimization scheme of the invention, the conductive layer is uniformly mixed CNT/PDMS, and is arranged in the hollow channel of the microneedle.

As a technical optimization scheme of the invention, the conducting layer is prepared from a conducting material and a conducting base material, the conducting material comprises carbon nano tube CNT, graphene, conducting high polymer PEDOT, Ag/AgCl and Au, and the conducting base material comprises PDMS, silica gel, TPE and PET.

As a technical optimization scheme of the present invention, the material of the high molecular microneedle structure includes:

metal: including nickel, titanium, and the like;

inorganic substances: including silicon, silicon dioxide, ceramics, etc.;

high polymer material: such as PMMA, PC, PP, PE, etc.;

water-soluble polymer: such as PU, etc.;

biodegradable material: such as PLA, PGA, PBAT, PHA, etc.

As a technical optimization scheme of the invention, the preparation method of the conducting layer and the high-molecular microneedle structure mainly comprises the following steps:

the method comprises the following steps: manufacturing a hollow microneedle patch;

the microneedle manufacturing method can refer to patent 201880026724.X, and the microneedle manufacturing method is based on a high polymer material, and has a certain channel after the high polymer material is solidified;

step two: preparing a conductive material and a conductive base material into conductive slurry;

dispersing Carbon Nanotubes (CNT) in the silica gel liquid PDMS, wherein the concentration of the carbon nanotubes is set to be 4.5%, and stirring in an internal mixer (the condition is more than 250rpm) for 10 hours to fully mix the carbon nanotubes and the silica gel liquid PDMS;

step three: coating and pressing conductive slurry (2-50%) into the microneedle patch;

pouring the uniformly mixed CNT/PDMS on the surface of the microneedle, uniformly coating the uniformly mixed CNT/PDMS on the top end of the microneedle, and pressing the uniformly mixed CNT/PDMS into a hollow channel of the microneedle;

step four: curing and molding the conductive slurry;

baking the microneedle patch coated with the uniformly mixed CNT/PDMS for 3 hours at a constant temperature of 80 ℃, curing the microneedle patch coated with the uniformly mixed CNT/PDMS, and forming a conductive circuit constructed by the carbon nanotube CNT in a channel of the microneedle by the cured CNT/PDMS.

To those skilled in the art;

firstly, the invention utilizes the conducting layer 1 as an electrode layer to collect signals, and because the conducting layer 1 takes silica gel as a substrate, the electrode can be attached to the substrate of flexible silica gel, thereby being better attached to the skin.

The micro-needle patch is used for conducting enhancement, and is compounded on the base material of the flexible material, so that noise can be effectively reduced, the needle head of the micro-needle is generally only dozens of microns in thickness and thinner than hair, so that the micro-needle can enter the epidermis without damage and is not contacted with nerves, when the micro-needle patch is taken away, the epidermis can be closed without damage, can penetrate through epidermis interference and is closer to the nerves, and signal collection is enhanced.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.