CN113370519A - Integrated flexible visual wearable device based on 3D printing and preparation method thereof - Google Patents
Integrated flexible visual wearable device based on 3D printing and preparation method thereof Download PDFInfo
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- CN113370519A CN113370519A CN202110682301.7A CN202110682301A CN113370519A CN 113370519 A CN113370519 A CN 113370519A CN 202110682301 A CN202110682301 A CN 202110682301A CN 113370519 A CN113370519 A CN 113370519A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
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Abstract
The invention belongs to the field of flexible wearable equipment, and particularly relates to integrated flexible visual wearable equipment based on 3D printing and a preparation method thereof. The invention provides a preparation method of integrated flexible visual wearable equipment based on 3D printing, which comprises the following steps: preparing a sensing ink which is mixed with stimulus responders and has shear thinning performance; preparing a supporting bath which is elastic, transparent and has shear thinning performance; printing sensing ink into the interior of the support bath by using a 3D printer; and (5) curing treatment. The invention also comprises wearable equipment manufactured by the method. The invention can adopt color change as a detection signal without the preparation of complex electronic circuits and the post-processing of electronic signals. The invention can realize the embedding and the packaging of the visual stimulus responder and the flexible body in one step, and has convenient operation. The invention can integrate a plurality of stimuli-responsive substances at the same time by using the support bath printing, thereby realizing multifunctional visual sensing.
Description
Technical Field
The invention belongs to the field of flexible wearable equipment, and particularly relates to integrated flexible visual wearable equipment based on 3D printing and a preparation method thereof.
Background
As emerging medical health monitoring instrument, flexible wearable equipment can help people real-time supervision human sign and environmental change, is receiving more and more the favor of consumer. The wearable devices currently in use are mainly flexible electronic wearable devices, and mainly include carbon-based materials represented by graphene, various forms of metals, and conductive polymers to prepare sensing conductive elements for collecting physiological electrical signals, physical electrical signals, chemical electrical signals, and the like. In the process of preparing the flexible electronic wearable device, in order to integrally manufacture the active material, the electrode and the substrate, the commonly adopted manufacturing method comprises coating, physical or chemical vapor deposition, photoetching, screen printing, layer-by-layer self-assembly and the like, and the single-yarn ammonia gas sensor is manufactured through the layer-by-layer self-assembly of the graphene oxide film and the cotton yarn. The manufacturing of flexible wearable electronic devices often involves the integration of a large number of active devices, acquisition boards, electronic circuitry and complex step-by-step assembly, which is cumbersome and costly. In addition, data acquisition mostly involves processing of a large number of electrical signals, which is time consuming.
3D printing is a new additive manufacturing technology, compared with the traditional manufacturing methods such as coating, deposition, injection printing and the like, the method has unique technical advantages, and can realize special structure design and precise manufacturing which cannot be achieved by the traditional processing method. However, due to the complexity of manufacturing flexible electronic circuits, the application of 3D printing in wearable electronic devices remains limited.
Disclosure of Invention
According to the integrated flexible visual wearable device based on 3D printing and the preparation method thereof, the flexible visual wearable device with the color visualized is prepared by printing the visual sensing ink through the 3D support bath, the flexible visual wearable device can be integrally prepared by the method, complicated circuit connection, an external power supply and a data transmission unit are not needed, and the human body and environment changes can be directly visually perceived.
The invention provides a preparation method of integrated flexible visual wearable equipment based on 3D printing, which comprises the following steps:
s1: preparing a sensing ink which is mixed with stimulus responders and has shear thinning performance;
s2: preparing a supporting bath which is elastic, transparent and has shear thinning performance;
s3: printing sensing ink into the interior of the support bath by using a 3D printer;
s4: and (5) curing treatment.
As a further optimization of the invention, the stimulus-response substance is an acoustic, optical, electric, thermal or magnetic stimulus-response substance, or an acid or alkali stimulus-response substance, or a chemical molecule or ion stimulus-response substance.
As a further refinement of the invention, the stimulus-responsive substance is a substance that changes color upon stimulation.
As a further optimization of the invention, the stimulus-responder comprises several species.
As a further refinement of the invention, the components of the sensor ink and the support bath comprise an elastomeric polymer.
As a further optimization of the present invention, the step of mixing the stimulus-responsive substance in step S1 further comprises the step of evacuating to remove air bubbles.
As a further optimization of the present invention, the stimulus-responsive substance of step S1 is added at a concentration of 0.5 wt% to 50 wt%.
As a further optimization of the present invention, the curing process in step S4 is heat curing, photo curing or drying.
As a further optimization of the invention, the printing pressure of the printer in the step S2 is 0.01MPa-0.6 MPa.
The invention also comprises wearable equipment manufactured by the method.
The invention has the following beneficial effects:
1. the invention can adopt color change as a detection signal without the preparation of complex electronic circuits and the post-processing of electronic signals.
2. The invention can realize the embedding and the packaging of the visual stimulus responder and the flexible body in one step, and has convenient operation.
3. The invention can integrate a plurality of stimuli-responsive substances at the same time by using the support bath printing, thereby realizing multifunctional visual sensing.
4. The invention utilizes 3D support bath printing, and can rapidly prepare visual wearable equipment in batches with high precision.
Drawings
FIG. 1 is a first schematic diagram of the present invention;
FIG. 2 is a second schematic diagram of the present invention;
fig. 3 is a comparison graph of ultraviolet visualization wearable devices prepared by 3D printing according to the present invention under different intensities of ultraviolet rays;
fig. 4 is a comparison graph of the visual temperature sensing flexible wearable device of the present invention at different temperatures;
fig. 5 is a comparison graph of the visual temperature and uv dual-functional flexible wearable device of the present invention under different conditions;
FIG. 6 is a diagram of a starch-based temperature wearable device according to the present invention;
fig. 7 is a real object diagram of the wearable device manufactured by 3D printing according to the present invention.
Wherein, support bath 1, sensing ink 2, feed cylinder 3, printing needle 4.
Detailed Description
Example 1
Weighing 10g of Polydimethylsiloxane (PDMS) prepolymer and a curing agent, wherein the proportion of the PDMS prepolymer to the curing agent is 10:1, mixing, adding 0.2g of spiropyran serving as a photochromic substance, mixing and stirring, vacuumizing to eliminate bubbles, and preparing the ultraviolet-responsive sensing ink 2.
Weighing 10g of PDMS prepolymer and curing agent, wherein the ratio of PDMS prepolymer to curing agent is 10:1, and mixing to prepare a material for the support bath 1.
As shown in fig. 1 and 2, the prepared sensor ink 2 is placed as a printing material in a cartridge 3 of a 3D printer, and the prepared support bath 1 is placed on a printing platform of the 3D printer. The specification that the printing needle 4 of 3D printer adopted is 25G, and printing pressure sets up 0.3Mpa, and printing speed sets up 30mm/s, and printing needle 4 is located support 1 inside and sets up 1.0mm apart from the height of platform, carries out patterning 3D and prints.
After printing, the printed sample is placed on a heating table, and the temperature is adjusted to 100 ℃ for heating and curing for 60 min. Finally obtain the visual wearable equipment that can detect different ultraviolet intensity, this equipment can judge ultraviolet intensity in real time according to the change of colour, and the person of facilitating the use judges ultraviolet intensity, does well individual protection. Fig. 3 is a photograph showing the simulation of ultraviolet irradiation with different intensities without ultraviolet irradiation indoors, and the intensity of ultraviolet rays can be determined according to the shade of the displayed color.
The spiropyran in this embodiment is a kind of stimulus-responsive substance as a photochromic substance, and the stimulus-responsive substance includes organic and inorganic substances, such as an acoustic, optical, electrical, thermal, magnetic stimulus-responsive substance, or an acid or alkali stimulus-responsive substance, or a chemical molecule or an ion stimulus-responsive substance. Wherein the photochromic substance is spiroheterocyclic spiropyran, spirooxazine, spirothiopyran, diarylethene, azobenzene, naphthopyran, zinc oxide, etc.; electrochromic materials such as tungsten oxide, magnesium oxide, molybdenum oxide; thermochromic conjugated polymers include Polydiacetylenes (PDAs), Polythiophenes (PTs), poly (phenylenevinylenes) (PPVs), poly (phenylenevinylenes) (PPEs), and the like. A substance whose stimulus-responsive substance changes color upon stimulation.
The detection range of the sensing ink relates to environment monitoring and detection of health indexes such as human motion physiology, and the method can also be used for sensing of single-function or dual-function or multifunctional wearable equipment, such as motion sensing, touch sensing, infrared sensing, sweat physiological indexes and other visual wearable equipment for sensing detection.
The PDMS prepolymer, the curing agent, and the spiropyran of this example were mixed to prepare the sensor ink 2, which has shear thinning properties. The supporting bath prepared by mixing the PDMS prepolymer and the curing agent also has shear thinning performance. In fact, as long as the shear thinning property is satisfied, the manufacturing components of the sensor ink 2 are not limited to the PDMS prepolymer, but other elastic polymers, such as natural or synthetic polymer materials or their mixed materials, specifically, resin, rubber, hydrogel, polyimide, polyacrylic acid, polyacrylamide, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene terephthalate, polydimethylsiloxane, polyurethane, chitosan, chitin, gelatin, polypeptide, hyaluronic acid, sodium alginate, starch, cellulose, etc., may be used.
Likewise, the PDMS prepolymer in the support bath may be made of other elastic polymers with elasticity and permeability, such as natural or synthetic polymers or mixtures thereof, as long as the support bath meets the shear thinning properties of Bingham fluids.
Example 2
In this embodiment, 10g of silicone rubber prepolymer and curing agent are weighed, the ratio of silicone rubber to curing agent is 10-20: 1, 1 wt% of thermochromic powder is added, and after mixing and stirring, bubbles are taken out by vacuumizing, and the temperature-responsive sensing ink is prepared.
Weighing 10g of PDMS prepolymer and curing agent, wherein the ratio of PDMS prepolymer to curing agent is 10:1, mixing, and preparing the support bath.
The prepared composite sensing ink is placed into a charging barrel of a 3D printer, the prepared support bath is placed on a printing platform of the 3D printer, a printing needle head is 23G, the printing pressure is 0.35Mpa, the printing speed is 35mm/s, the printing needle head is positioned inside the support bath and is 1.0mm away from the platform, and patterned printing is carried out.
And then, placing the printed sample on a heating table at 100 ℃ for heating and curing for 60min, and finally obtaining the visual wearable equipment capable of detecting the ambient temperature in real time. The final effect of this embodiment is shown in fig. 4.
Example 3
In this embodiment, 15g of PDMS prepolymer and a curing agent are weighed, the ratio of the PDMS prepolymer to the curing agent is 10:1, 0.5 wt% of thermochromic powder is added, the mixture is stirred and vacuumized to take out air bubbles, temperature-responsive sensing ink is prepared, then 0.3g of photochromic substances such as spiropyran are added, the mixture is stirred and vacuumized to eliminate air bubbles, and the composite sensing ink with ultraviolet response is prepared.
25g of PDMS prepolymer and curing agent were weighed in a 10:1 ratio and mixed to prepare a support bath.
The prepared composite sensing ink is placed into a 3D printer charging barrel, the prepared support bath 1 is placed on a platform of a 3D printer, a printing needle head is 22G, the printing pressure is 0.6Mpa, the printing speed is 25mm/s, the printing needle head is positioned inside the support bath and is 1.5mm away from the platform, and patterned printing is carried out.
And (3) placing the printed sample on a heating table at 120 ℃ for heating and curing for 30min, and finally obtaining the visual wearable equipment capable of detecting the environmental temperature and the ultraviolet intensity in real time. The final effect of this embodiment is shown in fig. 5.
Example 4
In this example, 1.8g of tapioca starch is weighed into 25mL of water, 25% of glycerol and 50% of thermochromic powder are added, and after mixing, the emulsion is gelatinized for 2 hours at 85 ℃ to prepare the temperature-responsive sensing ink.
Weighing 8g of cassava starch in 100mL of water, adding 0.5% of epoxy chloropropane and 25 wt% of glycerol, mixing, and gelatinizing the emulsion at 85 ℃ for 2h to prepare the supporting bath.
The prepared sensing ink is used as a printing material and is placed in a charging barrel of a 3D printer, the prepared support bath is placed in a 3D printing platform, a printing needle head 4 is 27G, the printing pressure is 0.01Mpa, the printing speed is 25mm/s, the printing needle head is positioned in the support bath and is 1mm away from the platform, and patterning printing is carried out.
And then, the printed sample is placed in an oven and dried for 8 hours at 40 ℃, and finally, the visual wearable equipment capable of detecting the temperature in real time can be obtained. The final effect of this embodiment is shown in fig. 6.
Of course, the curing method may be other methods such as photo-curing, besides heating and drying in the above embodiments.
In addition to the evacuation, the bubble removing step in the above 4 embodiments may also adopt other modes such as still standing or centrifugation, and the like.
The wearable device can detect different indexes according to different printed sensing inks, has different color changes under different stimulus responses, and can detect environmental indexes and human health indexes in real time.
It should be noted that the color change of the sensor ink 2 shown in fig. 1 to 7 is not limited to the shade change, and includes color changes such as red, blue, green, and purple.
The preparation method of the invention can be used for flexibly preparing the wearable devices with various shapes and requirements, and can be used for the current personalized product requirements.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A preparation method of integrated flexible visual wearable equipment based on 3D printing is characterized by comprising the following steps:
s1: preparing a sensing ink which is mixed with stimulus responders and has shear thinning performance;
s2: preparing a supporting bath which is elastic, transparent and has shear thinning performance;
s3: printing sensing ink into the interior of the support bath by using a 3D printer;
s4: and (5) curing treatment.
2. The method of claim 1, wherein the stimulus-responsive substance is an acoustic, optical, electrical, thermal, magnetic stimulus-responsive substance, or an acid or base stimulus-responsive substance, or a chemical molecule or ion stimulus-responsive substance.
3. A method according to claim 1 or 2, wherein the stimulus-responsive substance is a substance which changes colour upon stimulation.
4. The method of claim 1, wherein the stimulus-responsive substance comprises a plurality of substances.
5. The method of claim 1, wherein the components of the sensing ink and the support bath comprise an elastomeric polymer.
6. The method of claim 1, wherein the step of mixing the stimulus-responsive substance in step S1 further comprises the step of removing bubbles by vacuum.
7. The method according to claim 1, wherein the stimulus-responsive substance of step S1 is added at a concentration of 0.5 wt% to 50 wt%.
8. The production method according to claim 1, wherein the curing treatment in step S4 is heat curing, light curing, or drying.
9. The method of claim 1, wherein the printer printing pressure of step S2 is 0.01Mpa-0.6 Mpa.
10. A wearable device, characterized by being made using the method of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110682301.7A CN113370519A (en) | 2021-06-20 | 2021-06-20 | Integrated flexible visual wearable device based on 3D printing and preparation method thereof |
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| CN202110682301.7A CN113370519A (en) | 2021-06-20 | 2021-06-20 | Integrated flexible visual wearable device based on 3D printing and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413744A (en) * | 2022-03-07 | 2022-04-29 | 西安交通大学 | 3D printing composite material flexible strain sensor based on auxetic structure and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413744A (en) * | 2022-03-07 | 2022-04-29 | 西安交通大学 | 3D printing composite material flexible strain sensor based on auxetic structure and preparation method thereof |
| CN114413744B (en) * | 2022-03-07 | 2023-04-07 | 西安交通大学 | 3D printing composite material flexible strain sensor based on auxetic structure and preparation method thereof |
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