Pluggable circuit bonded by 3D printing material and elastomer and preparation method

Abstract

The invention relates to the field of liquid metal micro-fluidic chips, in particular to a pluggable circuit bonded by a 3D printing material and an elastomer and a preparation method of the pluggable circuit. The pluggable circuit bonded by the 3D printing material and the elastomer comprises an elastomer base layer circuit which comprises an elastomer circuit channel and a packaging film; the 3D printing component comprises a component channel and a component outer wall; and an elastomer encapsulation block; wherein the elastomer circuit channel and the component channel are filled with liquid metal; fins are arranged in the component channel; and the component channel is connected with the elastomer circuit channel. According to the pluggable circuit bonded by the 3D printing material and the elastomer provided by the invention, the 3D printing material and the micro-fluidic chip can be well combined based on the liquid metal pluggable circuit design connected by the novel 3D printing material and the thermosetting elastomer, and the liquid metal can be prevented from leaking.

Description

Technical Field

[0001] The present invention relates to the field of liquid metal microfluidic chips, and in particular to a pluggable circuit bonded by a 3D printing material and an elastomer and a preparation method thereof. Background Art

[0002] Integration is an inevitable trend in the development of modern circuits. Among them, making the circuit three-dimensional is a good idea. By increasing the dimension of the circuit, the diversity and complexity of the circuit design can be improved. Microfluidics is a discipline that precisely controls microfluids. It realizes the preparation of functional devices by designing microchannels into various shapes and connecting them with some external equipment.

[0003] In microfluidic chips, in addition to manipulating some conventional fluids, liquid metal is also a good choice. Liquid metal is named for its liquid state at room temperature. It is a multifunctional material that combines the properties of metal and fluid, showing properties such as high conductivity, high thermal conductivity, and good fluidity. At present, how to better integrate 3D printing, microfluidic chips and liquid metal into a composite chip, combine the advantages of the three, make it have more unique excellent performance, and play a greater role is an important topic in this field. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a pluggable circuit bonded by a 3D printing material and an elastomer and a preparation method thereof.

[0005] According to the research of the present invention, 3D printed microfluidic liquid metal chips have their unique advantages, but it is difficult to combine 3D printed materials and microfluidic chips well. Since liquid metal requires a certain pressure to be poured into the microchannel, if the 3D printed material and the microfluidic chip are not tightly connected, the liquid metal will leak, resulting in the failure of chip production, and the subsequent design cannot be completed. Therefore, how to connect the 3D printed material and the elastomer well to avoid liquid metal leakage is a difficult problem worthy of attention. The present invention provides a liquid metal pluggable circuit design based on the connection of a new 3D printed material and a thermosetting elastomer.

[0006] In a first aspect, the pluggable circuit bonded by a 3D printing material and an elastomer provided by the present invention comprises:

[0007] an elastomeric substrate circuit, including an elastomeric circuit channel and an encapsulation film;

[0008] 3D printed parts, including part channels and part outer walls;

[0009] and an elastomer encapsulation block;

[0010] The component channel is connected to the elastic body circuit channel, and the connected structural channel is filled with liquid metal; and ribs are arranged in the component channel.

[0011] In the present invention, the design of the liquid metal pluggable circuit based on the connection between the new 3D printing material and the thermosetting elastomer provides a good connection method between the elastomer and the 3D printing material, so that the 3D printing material and the microfluidic chip can be well combined, and the complete liquid metal perfusion and the pluggable circuit can be realized, and the leakage of the liquid metal can be avoided.

[0012] Preferably, the elastomer circuit channel is provided with a first through hole and a second through hole, the first through hole is used to connect to an external power source, the second through hole is used to connect to a 3D printed component, and the second through hole is communicated with the component channel.

[0013] Preferably, the elastomer packaging block is provided with a small hole; the small hole, the component channel and the elastomer circuit channel are connected.

[0014] Further preferably, it further comprises a pluggable device, wherein the pluggable device is connected to the pluggable circuit through the small hole; preferably, the pluggable device is a pluggable LED lamp.

[0015] Further preferably, the component channels correspond to the positions of the second through holes one by one; preferably, the number, size and position of the component channels are determined by the elastomer base circuit and the elastomer base circuit.

[0016] Further preferably, the elastomeric packaging block, the elastomeric circuit channel, and the packaging film are made of thermosetting elastomeric materials; preferably, the thermosetting elastomeric materials are selected from one or more of PDMS, ECOFLEX, and human silicone.

[0017] In a second aspect, the present invention provides a method for preparing a pluggable circuit bonded with a 3D printing material and an elastomer, comprising:

[0018] 1) using a thermosetting elastomer material to encapsulate a thermosetting elastomer substrate having a circuit structure to provide the elastomer base circuit;

[0019] 2) connecting the elastomer base circuit to the 3D printed component;

[0020] 3) connecting the 3D printed component to the elastomer packaging block;

[0021] 4) Pour liquid metal into the structural channel.

[0022] Preferably, in step 2), hot melt adhesive is attached between the elastomer base circuit and the 3D printed component, and connection is performed by high temperature and pressure.

[0023] Preferably, in step 2), a liquid thermosetting elastomer material is coated on the surface of the 3D printed component, heated to a viscous state, and then the elastomer-based circuit is placed for connection.

[0024] Preferably, in step 2), the surface of the 3D printed component is subjected to air plasma treatment, and then placed in an APTES solution or a TMSPMA solution or a GPTMS solution or an MPS solution for surface modification, the modified thermosetting elastomer material of the 3D printed component and the elastomer-based circuit are subjected to air plasma treatment, and the plasma-treated 3D printed component and the elastomer-based circuit are connected.

[0025] Preferably, in step 3), hot melt adhesive is attached between the elastomer packaging block and the 3D printed component, and they are connected by high temperature and pressure.

[0026] Preferably, in step 3), a liquid thermosetting elastomer material is coated on the surface of the 3D printed component, heated to a viscous state, and then the elastomer packaging block is placed for connection.

[0027] Preferably, in step 3), the surface of the 3D printed component is subjected to air plasma treatment, and then placed in an APTES solution or a TMSPMA solution or a GPTMS solution or an MPS solution for surface modification, the modified thermosetting elastomer material of the 3D printed component and the elastomer packaging block are subjected to air plasma treatment, and the plasma-treated 3D printed component and the elastomer packaging block are connected.

[0028] Further preferably, it also includes: inserting an LED lamp; and / or providing a wire for connecting to an external power source.

[0029] The beneficial effects of the present invention are at least that: the pluggable circuit bonded by 3D printing material and elastomer provided by the present invention is based on the design of liquid metal pluggable circuit connected by new 3D printing material and thermosetting elastomer, 3D printing material and microfluidic chip can be well combined, and liquid metal leakage can be avoided. The present invention is relatively convenient and fast to manufacture and can realize the three-dimensionalization of the circuit, and can realize more complex functions. The present invention can design the circuit into different schemes according to different design requirements to realize circuit diversification. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a schematic diagram of the structure of a pluggable circuit provided in a specific embodiment of the present invention;

[0032] Figure 2 is a schematic top view of an elastomer-based circuit provided in a specific embodiment of the present invention;

[0033] Figure 3 is a front cross-sectional schematic diagram of a 3D printed connection component provided in a specific embodiment of the present invention;

[0034] In the figure: 1. Elastomer base circuit; 2. Connecting component; 3. Elastomer packaging block; 4. Elastomer circuit channel; 5. First through hole; 6. Packaging film; 7. Component outer wall; 8. Component channel; 9. Rib; 10. Second through hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] If no specific technology or conditions are specified in the examples, the technology or conditions described in the literature in the field or the product instructions are used. If the manufacturer of the instruments is not specified, they are all conventional products that can be purchased through regular channels. The methods are conventional methods unless otherwise specified, and the raw materials can be obtained from public commercial channels unless otherwise specified.

[0037] The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0038] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0039] like Figure 1-3 As shown, a specific embodiment of the invention provides a liquid metal pluggable circuit bonded with a new 3D printing material and an elastomer, including an elastomer base circuit 1, a 3D printing component 2 (intermediate connecting component) and an elastomer packaging block 3. Specifically, the elastomer base circuit 1 includes an elastomer circuit channel 4 and a packaging film 6; the 3D printing component 2 includes a component channel 8 and a component outer wall 7; wherein the component channel 8 is connected to the elastomer circuit channel 4, and the connected structural channel is filled with liquid metal; and a rib 9 is provided in the component channel 8. The pluggable circuit provided in the embodiment of the present invention is based on the design of a liquid metal pluggable circuit connected with a new 3D printing material and a thermosetting elastomer, and provides a good connection method between the elastomer and the 3D printing material, so that the 3D printing material and the microfluidic chip can be well combined, and the complete liquid metal infusion and the realization of the pluggable circuit can be realized, and the leakage of the liquid metal can be avoided.

[0040] According to some embodiments of the present invention, the packaging film 6 and the elastomer circuit channel 4 are tightly bonded to package the elastomer base circuit 1 .

[0041] In some embodiments of the present invention, in the pluggable circuit bonded with the 3D printing material and the elastomer, the 3D printed component is designed by 3D modeling software and manufactured by 3D printing. The 3D printed components are divided into an outer wall, a fluid channel and a fin structure (i.e., the outer wall of the component, the component channel and the fin). The outer wall is used to support the entire component, and the fluid channel is connected to the elastomer base circuit to complete the conduction of the circuit. Some fins are also designed on the inner side wall of the fluid channel. The structural design direction of the fins is the same as the direction in which the pluggable device is inserted. It will not block the pluggable device when it enters, and scrape off the liquid metal adhering to the pluggable device when the pluggable device leaves, thereby reducing the leakage of liquid metal.

[0042] As a preferred embodiment, the elastic body circuit channel 4 is provided with a first through hole 5 and a second through hole 10, wherein the first through hole 5 is used to connect an external power source, the second through hole 10 is used to connect a 3D printed component 2, and the second through hole 10 is connected to the component channel 8. In the bonding process, alignment is a key factor, and the alignment of the second through hole 10 with the component channel 8 ensures that the liquid metal can be smoothly poured from the upper layer to the lower layer without leakage.

[0043] In a preferred embodiment of the present invention, the first through hole 5 and the second through hole 10 are formed by a puncher, and the hole diameter is determined by the punch of the puncher.

[0044] As a preferred embodiment, the elastomer packaging block 3 is provided with a small hole; the small hole, the component channel 8 and the elastomer circuit channel 4 are connected. Similarly, in the bonding process, alignment is a key factor, which ensures that the liquid metal can be smoothly poured from the upper layer to the lower layer without leakage.

[0045] A further preferred embodiment further includes a pluggable device, which is connected to the pluggable circuit through the small hole; preferably, the pluggable device is a pluggable LED lamp; preferably, the insertion direction of the LED lamp is the same as the arrangement direction of the ribs, so that there is no obstruction when the device enters, and the liquid metal adhering to the pluggable device is scraped off when the pluggable device leaves, thereby reducing the leakage of the liquid metal.

[0046] In a further preferred embodiment, the positions of the component channels 8 and the second through holes 10 correspond one to one; preferably, the number, size and position of the component channels 8 are determined by the elastomer base circuit 1 and the elastomer base circuit 10 .

[0047] In a further preferred embodiment, the elastomeric packaging block 3, the elastomeric circuit channel 4, and the packaging film 6 are made of thermosetting elastomeric materials; preferably, the thermosetting elastomeric materials are selected from one or more of PDMS, ECOFLEX, and human silicone.

[0048] The embodiment of the present invention also provides a method for preparing a pluggable circuit bonded with the 3D printing material and an elastomer, comprising:

[0049] 1) using a thermosetting elastomer material to encapsulate a thermosetting elastomer substrate having a circuit structure to provide the elastomer base circuit 1;

[0050] 2) connecting the elastomer base circuit 1 to the 3D printed component 2;

[0051] 3) connecting the 3D printed component 2 to the elastomer packaging block 3;

[0052] 4) Pour liquid metal into the structural channel.

[0053] As a preferred embodiment, in step 2), hot melt adhesive is attached between the elastomer base circuit 1 and the 3D printed component 2, and they are connected by high temperature and pressure.

[0054] As a preferred embodiment, in step 2), a liquid thermosetting elastomer material is coated on the surface of the 3D printed component 2, heated to a viscous state, and then the elastomer-based circuit 1 is placed for connection.

[0055] As a preferred embodiment, in step 2), the surface of the 3D printed component 2 is subjected to air plasma treatment, and then placed in an APTES (TMSPMA / GPTMS / MPS) solution for surface modification, the modified 3D printed component thermosetting elastomer material and the elastomer base circuit 1 are subjected to air plasma treatment, and the plasma-treated 3D printed component 2 and the elastomer base circuit 1 are connected.

[0056] As a preferred embodiment, in step 3), hot melt adhesive is attached between the elastomer packaging block 3 and the 3D printed component 2, and they are connected by high temperature and pressure.

[0057] As a preferred embodiment, in step 3), a liquid thermosetting elastomer material is coated on the surface of the 3D printed component 2, heated to a viscous state, and then the elastomer packaging block 3 is placed for connection.

[0058] As a preferred embodiment, in step 3), the surface of the 3D printed component 2 is subjected to air plasma treatment, and then placed in an APTES (TMSPMA / GPTMS / MPS) solution for surface modification, the modified 3D printed component thermosetting elastomer material and the elastomer packaging block 3 are subjected to air plasma treatment, and the plasma-treated 3D printed component 2 and the elastomer packaging block 3 are connected.

[0059] A further preferred embodiment further includes: inserting an LED lamp; and / or providing a wire for connecting to an external power source.

[0060] A further preferred embodiment further comprises: before pouring the liquid metal, a small hole is pierced with a syringe at a position on the elastomer packaging block connected to the component channel to exhaust air.

[0061] Furthermore, in some embodiments of the present invention, the pluggable circuit bonded with 3D printing material and elastomer and the preparation method thereof are completed by 3D printing of the intermediate connection channel, which is convenient and quick to manufacture, and can realize the three-dimensionalization of the circuit and complete more complex functions. The irreversible bonding between the 3D printing material and the elastomer material is completed by surface coating or modification of the 3D printing material. At the same time, the pluggable circuit is realized by the irreversible bonding between the 3D printing material and the elastomer material. The circuit can also be designed into different schemes according to different design requirements to realize the diversification of the circuit.

[0062] In one embodiment of the present invention, the 3D printed connecting component varies according to the chip size.

[0063] In one embodiment of the present invention, the elastomer packaging block can be changed according to the size of the 3D printing material, and only needs to cover the upper liquid metal outlet, with a thickness of 1±0.2 mm.

[0064] In one example of the present invention, the elastomer-based chip needs to be designed and changed according to the required circuit, the outlet of the chip liquid metal and the inlet of the 3D-printed channel need to correspond to each other, and the thickness is 1±0.2 mm.

[0065] In one embodiment of the present invention, the hot melt adhesive is a porous hot melt adhesive having a melting point of 80±2°C.

[0066] In one embodiment of the present invention, the APTES solution is used to treat the 3D printing material, and the concentration is 5% by volume. The solution only needs to cover the surface of the 3D printing material.

[0067] In one embodiment of the present invention, the TMSPMA solution is used to treat the 3D printing material, and the concentration is 6% by volume. The solution only needs to cover the surface of the 3D printing material.

[0068] In one embodiment of the present invention, the GPTMS solution is used to treat the 3D printing material, and the concentration is 1% by volume. The solution only needs to cover the surface of the 3D printing material.

[0069] In one embodiment of the present invention, the MPS solution is used to treat the 3D printing material, and the concentration is 5% by volume. The solution only needs to cover the surface of the 3D printing material.

[0070] In one embodiment of the present invention, the liquid metal is Ga 75 In 25 (75% gallium, 25% indium, melting point is 15.7°C).

[0071] In a specific embodiment of the present invention, a method for preparing a pluggable circuit based on a liquid metal bonded with a novel 3D printing material and an elastomer is provided, comprising:

[0072] 1) preparing an elastomer substrate having a circuit structure;

[0073] 2) encapsulating the elastomer substrate with the circuit structure with a thin elastomer layer to complete the preparation of the elastomer-based circuit;

[0074] 3) Draw the structural diagram of 3D printed parts and perform 3D printing;

[0075] 4) Connecting the completed elastomer-based circuit to the 3D printed component;

[0076] 5) Encapsulating the circuit on the circuit where the elastomer base circuit and the 3D printed component have been connected;

[0077] 6) Fill the packaged structural channel with liquid metal to complete the production of the entire circuit.

[0078] The liquid metal pluggable circuit provided in some embodiments of the present invention has an elastomer substrate selected as a cured elastomer sheet. Taking PDMS as an example, the PDMS substrate colloid and the curing agent are mixed in a ratio of 10:1, and then evacuated in a vacuum box for about 40 minutes. After the bubbles disappear, the PDMS mixture is poured on a SU-8 mold made by a soft lithography process. The SU-8 mold is made on a 4-inch silicon wafer substrate. Then, the SU8 mold covered with PDMS is placed on a heating plate and cured at a heating temperature of 75°C for 2 hours. Cut the cured PDMS into a suitable shape and punch holes with a punch.

[0079] The liquid metal pluggable circuit provided in some embodiments of the present invention comprises a method for encapsulating a PDMS substrate having a circuit structure with a thin elastomer layer, wherein the structured elastomer substrate and the elastomer film are subjected to standard air plasma treatment to bond the two, and then an elastomer-based circuit is formed.

[0080] The 3D printed components provided in some embodiments of the present invention are designed by 3D modeling software and manufactured by 3D printing. The 3D printed components are divided into an outer wall, a fluid channel and a fin structure. The outer wall is used to support the entire component, and the fluid channel is connected to the elastomer base circuit to complete the conduction of the circuit. Some ribs are also designed on the inner side wall of the fluid channel. The structural design direction of the ribs is the same as the direction in which the pluggable device is inserted. It will not block the pluggable device when it enters, and will scrape off the liquid metal stuck on the pluggable device when the pluggable device leaves, thereby reducing the leakage of liquid metal.

[0081] The liquid metal pluggable circuit provided in some embodiments of the present invention includes a physical method and a chemical method for connecting the elastomer base circuit and the 3D printed component, wherein the physical method is as follows: 1) cutting the hot melt adhesive into a suitable size and attaching it between the elastomer base circuit and the 3D printed component, placing it on a 120°C baking plate for heating, and pressing a heavy object on top during the heating process to help better bonding until the two are tightly connected; 2) evenly coating the liquid PDMS (ECOFLEX / human silicone and its mixture, etc.) on the surface of the 3D printed component, placing it on a heating table at 75°C for heating, heating and waiting for the PDMS (ECOFLEX / human silicone and its mixture, etc.) to a slightly sticky state, placing the PDMS (ECOFLEX / human silicone and its mixture, etc.) base circuit on the 3D printed component and continuing to heat it until the two are tightly connected; 3) evenly coating the liquid glue (for example, 705) on the surface of the 3D printed component, placing the elastomer base circuit on the 3D printed component, and pressing it with a heavy object until the two are tightly connected. Chemical method: The 3D printed parts were subjected to standard air plasma treatment, and the 3D printed parts after plasma treatment were immersed in APTES (TMSPMA / GPTMS / MPS) solution for 20 minutes. The 3D printed parts and the elastomer base circuit after soaking in the solution were subjected to air plasma treatment, and the two surfaces after plasma treatment were bonded and placed on a heating table at 95°C for 10 minutes.

[0082] The liquid metal pluggable circuit provided in some embodiments of the present invention is packaged on a circuit that has already completed the connection between the elastomer base circuit and the 3D printed component. The other surface of the 3D printed component of the circuit that has completed the connection between the elastomer base circuit and the 3D printed component is tightly fitted to the elastomer packaging block in the same way.

[0083] In some embodiments of the present invention, the method for filling the packaged structural channel with liquid metal in the liquid metal pluggable circuit is to use a syringe to inject liquid metal into the base elastomer circuit with holes punched in it to ensure that the liquid metal fills the entire circuit.

[0084] In a further preferred embodiment, the aperture size of the elastomer is determined by the size of the punching hole, and the size of the 3D printing channel is determined by the aperture size of the elastomer, and its size should be slightly larger than the aperture size of the elastomer.

[0085] In a further preferred embodiment, the height of the 3D printed channel is determined by the size of the pluggable components, and the size of the fins inside the channel is half of the radius of the channel and is distributed at a position above half of the channel height.

[0086] Some embodiments of the present invention provide a pluggable liquid metal circuit bonded with a novel 3D printing material and an elastomer. After the 3D printing material is coated or modified, the upper and lower surfaces are bonded with the corresponding elastomer to complete the overall packaging of the chip, the packaged chip is filled with liquid metal, and an external power supply is connected, and an LED lamp is inserted into the position of the channel corresponding to the 3D printing component to realize a pluggable circuit.

[0087] A specific embodiment of the present invention, a specific physical preparation method of the pluggable circuit:

[0088] (1) According to the specific circuit, the size of the elastic body is determined by the designed circuit, and the thickness is generally about 1mm. It can take into account both flexibility and aesthetics;

[0089] (2) The preparation of the elastomer-based circuit is as follows: Taking PDMS as an example, mix 20g of PMDS colloid and 2g of curing agent in a disposable plastic cup, stir with a glass rod for 5 minutes, and then put the mixed PDMS liquid glue into a vacuum drying oven for 40 minutes to eliminate bubbles generated during the stirring process. The liquid PDMS after the bubbles are eliminated is poured on a patterned silicon wafer made by the soft lithography process, placed on an optical platform for leveling treatment, and then baked on a 75°C heating plate for 1.5 hours. Take out the cured PDMS and cut it according to the edge of the pattern, and use a puncher to punch holes at the corresponding positions of the first through hole and the second through hole. After punching, put the structured side and the PDMS backing film into a plasma treatment machine for air plasma treatment, so that the PDMS backing film and the PDMS circuit layer can fit tightly together;

[0090] (3) Use SOLIDWOKS software to design the structure of the intermediate connecting parts, import the designed drawings into the 3D printing machine for 3D printing, and the selected material is precision photosensitive resin;

[0091] (4) Surface coating of the printed 3D connectors. Specific processing methods: 1) Cut the hot melt adhesive into suitable sizes and attach it between the elastomer base circuit and the 3D printed component, place it on a 120°C baking plate for heating, and press a heavy object on top during the heating process to help better adhesion until the two are tightly connected; or 2) Evenly apply liquid PDMS (ECOFLEX / human silicone and its mixture, etc.) on the surface of the 3D printed component, place it on a 75°C heating table for heating, wait for the PDMS (ECOFLEX / human silicone and its mixture, etc.) to be slightly sticky, place the PDMS (ECOFLEX / human silicone and its mixture, etc.) base circuit on the 3D printed component and continue heating until the two are tightly connected; or 3) Evenly apply liquid glue (such as 705) on the surface of the 3D printed component, place the elastomer base circuit on the 3D printed component, and press it with a heavy object until the two are tightly connected. The second through hole and the component channel should be aligned when the two surfaces are bonded;

[0092] (5) Bonding the elastomer encapsulation block to the other surface of the 3D printed component, the specific steps are the same as (4);

[0093] (6) Use a syringe to inject liquid metal into the entire channel at the first through hole position. In order to exhaust the gas well, a few small holes can be pierced with a syringe at the position where the elastic packaging block is connected to the component channel before injecting the liquid metal to exhaust the gas;

[0094] (7) Insert a wire into the first through hole to connect it to an external power source, and insert a pluggable LED lamp into the pierced hole. The direction in which the LED lamp is inserted is the same as the direction in which the ribs are arranged, which will not hinder the insertion of the LED lamp. The direction in which the LED lamp is pulled out is opposite to the direction in which the ribs are arranged. At this time, the ribs will scrape away the liquid metal, and the upper elastic encapsulation block will also prevent the leakage of the liquid metal.

[0095] A specific embodiment of the present invention provides a specific chemical preparation method for the pluggable circuit:

[0096] (1) According to the specific circuit, the size of the elastic body is determined by the designed circuit. The thickness is generally about 1mm, which can take into account both flexibility and aesthetics;

[0097] (2) The preparation of the elastomer-based circuit is as follows: Taking PDMS as an example, mix 20g of PMDS colloid and 2g of curing agent in a disposable plastic cup, stir with a glass rod for 5 minutes, and then put the mixed PDMS liquid glue into a vacuum drying oven for 40 minutes to eliminate bubbles generated during the stirring process. The liquid PDMS after the bubbles are eliminated is poured on a patterned silicon wafer made by the soft lithography process, placed on an optical platform for leveling treatment, and then baked on a 75°C heating plate for 1.5 hours. Take out the cured PDMS and cut it according to the edge of the pattern, and use a puncher to punch holes at the corresponding positions of the first through hole and the second through hole. After punching, put the structured side and the PDMS bottom film (encapsulation film) into a plasma treatment machine for air plasma treatment, so that the PDMS bottom film and the PDMS circuit layer can fit tightly together;

[0098] (3) Use SOLIDWOKS software to design the structure of the intermediate connecting parts, import the designed drawings into the 3D printing machine for 3D printing, and the selected material is precision photosensitive resin;

[0099] (4) The printed 3D connection component is surface modified. The specific treatment method is to prepare an APTES (TMSPMA / GPTMS / MPS) solution, treat the 3D printed component with standard air plasma, and then immerse it in the APTES (TMSPMA / GPTMS / MPS) solution for 20 minutes. The 3D printed component and the elastomer packaging block after immersion in the solution are treated with standard air plasma. The two surfaces after plasma treatment are bonded and placed on a 95°C heating table for 10 minutes. When the two surfaces after plasma treatment are bonded, the second through hole 10 and the component channel should be aligned;

[0100] (5) Bonding the elastomer encapsulation block to the other surface of the 3D printed component, the specific steps are the same as step (4);

[0101] (6) Using a syringe to inject liquid metal into the entire channel at the first through hole position; in addition, in order to enable good exhaust, before injecting liquid metal, a small hole is pierced with a syringe at the position connected to the component channel on the elastomer packaging block to exhaust gas;

[0102] (7) Insert a wire into the first through hole to connect it to an external power source, and insert a pluggable LED lamp into the pierced small hole. The arrangement direction of the ribs is the same as the insertion direction of the LED lamp. Since the insertion direction of the LED is the same as the arrangement direction of the ribs, the insertion of the LED will not be hindered. The removal direction of the LED lamp is opposite to the arrangement direction of the ribs. At this time, the ribs will scrape away the liquid metal, and the upper elastic encapsulation block will also prevent the leakage of the liquid metal.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pluggable circuit bonded by a 3D printing material and an elastomer, characterized in that: include: an elastomeric substrate circuit, including an elastomeric circuit channel and an encapsulation film; 3D printed parts, including part channels and part outer walls; and an elastomer encapsulation block; The component channel is connected to the elastic body circuit channel, and the connected structural channel is filled with liquid metal; and ribs are arranged in the component channel.

2. The pluggable circuit bonded by 3D printing material and elastomer according to claim 1, characterized in that: The elastic body circuit channel is provided with a first through hole and a second through hole, wherein the first through hole is used to connect to an external power source, the second through hole is used to connect to a 3D printed component, and the second through hole is communicated with the component channel.

3. The pluggable circuit bonded by 3D printing material and elastomer according to claim 1 or 2, characterized in that: The elastomer packaging block is provided with a small hole; the small hole, the component channel and the elastomer circuit channel are connected.

4. The pluggable circuit bonded by 3D printing material and elastomer according to any one of claims 1 to 3, characterized in that: Also included is a pluggable device, which is connected to the pluggable circuit through the small hole.

5. The pluggable circuit bonded by 3D printing material and elastomer according to any one of claims 1 to 4, characterized in that: The positions of the component channels and the second through holes correspond one to one.

6. The pluggable circuit bonded by 3D printing material and elastomer according to any one of claims 1 to 5, characterized in that: The elastomer packaging block, the elastomer circuit channel, and the packaging film are made of thermosetting elastomer material; Preferably, the thermosetting elastomer material is selected from one or more of PDMS, ECOFLEX, and human silicone.

7. The method for preparing a pluggable circuit bonded by a 3D printing material and an elastomer according to any one of claims 1 to 6, characterized in that: include: 1) using a thermosetting elastomer material to encapsulate a thermosetting elastomer substrate having a circuit structure to provide the elastomer base circuit; 2) connecting the elastomer base circuit to the 3D printed component; 3) connecting the 3D printed component to the elastomer packaging block; 4) Pour liquid metal into the structural channel.

8. The method for preparing a pluggable circuit bonded by a 3D printing material and an elastomer according to claim 7, characterized in that: In step 2), hot melt adhesive is attached between the elastomer base circuit and the 3D printed component, and they are connected by high temperature and pressure; Or, a liquid thermosetting elastomer material is coated on the surface of the 3D printed component, heated to a viscous state, and then the elastomer base circuit is placed for connection; Alternatively, the surface of the 3D printed component is subjected to air plasma treatment, and then placed in an APTES solution, a TMSPMA solution, a GPTMS solution, or an MPS solution for surface modification, the modified 3D printed component thermosetting elastomer material and the elastomer base circuit are subjected to air plasma treatment, and the plasma-treated 3D printed component and the elastomer base circuit are connected.

9. The method for preparing a pluggable circuit bonded by a 3D printing material and an elastomer according to claim 7 or 8, characterized in that: In step 3), hot melt adhesive is attached between the elastomer packaging block and the 3D printed component, and they are connected by high temperature and pressure; Alternatively, a liquid thermosetting elastomer material is coated on the surface of the 3D printed component, heated to a viscous state, and then the elastomer encapsulation block is placed for connection; Alternatively, the surface of the 3D printed component is subjected to air plasma treatment, and then placed in an APTES solution, a TMSPMA solution, a GPTMS solution, or an MPS solution for surface modification, the modified thermosetting elastomer material of the 3D printed component and the elastomer packaging block are subjected to air plasma treatment, and the plasma-treated 3D printed component and the elastomer packaging block are connected.

10. The method for preparing a pluggable circuit bonded by a 3D printing material and an elastomer according to any one of claims 7 to 9, characterized in that: Also includes: Insert the LED light; And / or, a wire for connecting to an external power source is provided.

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