CN105038249A - Stretchable conductive composite and preparing method and application thereof - Google Patents
Stretchable conductive composite and preparing method and application thereof Download PDFInfo
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- CN105038249A CN105038249A CN201510559516.4A CN201510559516A CN105038249A CN 105038249 A CN105038249 A CN 105038249A CN 201510559516 A CN201510559516 A CN 201510559516A CN 105038249 A CN105038249 A CN 105038249A
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Abstract
The invention discloses stretchable conductive composite and a preparing method and application thereof. A grid structure of cotton is utilized, cotton in a proper shape is selected, then a silver nanowire is loaded to form a silver nanowire grid structure, next the silver nanowire grid structure is loaded on PDMS, and the stretchable conductive composite with excellent performance is prepared. The prepared stretchable conductive composite still maintains excellent electrical conductivity under certain deformation and multiple times of cyclic action. Besides, the prepared stretchable conductive composite can be used as a wire and can be used for the fields of bent display screens, flexible sensors, wearable electronic equipment and the like.
Description
Technical field
The present invention relates to elastic conduction field of compound material, be specifically related to a kind of stretchable conducing composite material and preparation method thereof and application.
Background technology
Along with the fast development of science and technology, some emerging fields such as rollable indicating meter, Multifunctional electronic observer, flexible electronic device, Multifunction Sensor etc. propose flexible stretchable performance requriements to electro-conductive material.By the polymer matrix composite that the conductivity of the electro-conductive materials such as the deformability of elastomeric polymer and metal nano combines, pay close attention to widely because the features such as its easy preparation, light weight cause.Can there is deformation in elastomeric polymer, and the electrical-conductive nanometer such as metal nano material, carbon nanotube material has high conductivity but do not possess deformability, thus will prepare elastic conducting material, elastomeric polymer and electrical-conductive nanometer material need be carried out compound.Prepare this matrix material it is crucial that electrical-conductive nanometer material dispersing mode in the polymer, still can keep conductive path to make this matrix material when deformation such as bending stretchs.
Material according to the loose grid structure of sky can realize it in stretching, the deformation situation such as bending due to its special structure, and the connection of various piece is complete.Just based on this, a lot of research reports and utilizes the ordered arrangement such as carbon nanotube, Graphene to be formed can the grid of deformation to be then carried in elastomeric polymer, the flexible materials of forming property excellence.But its most preparation process all needs special condition to realize electrical-conductive nanometer material ordered arrangement in the polymer, thus the grid structure needed for being formed.Therefore, preparation process more complicated, and cost is higher.
Summary of the invention
[technical problem that will solve]
The object of the invention is the problem solving above-mentioned prior art, propose a kind of stretchable conducing composite material and preparation method thereof and application.Stretchable conducing composite material prepared by the present invention repeatedly still keeps excellent electroconductibility after Circulation under certain deformation.And electro-conductive material of the present invention can be used for comprising the fields such as bending display screen, flexible sensor, wearable electronic.
[technical scheme]
In order to reach above-mentioned technique effect, the present invention takes following technical scheme:
The present invention utilizes the grid structure of cotton, and by selecting suitable shape cotton, then load nano silver wire forms nano silver wire network structure, then by being carried in PDMS, prepares the stretchable conducing composite material of excellent performance.
A kind of stretchable conducing composite material, it is by after cotton load nano silver wire, wraps up the conducing composite material that can stretch of formation with PDMS.
A preferred embodiment of the present invention, described cotton is fluffy degrease cotton, its density≤0.07g/cm
3.
Another preferred embodiment of the present invention, described nano silver wire is bar-shaped, its diameter >=8 μm.
A preparation method for above-mentioned stretchable conducing composite material, it comprises the following steps:
A, the preparation of nano silver wire solution
First, nano silver wire is dissolved in ethanol or Virahol, obtains the nano silver wire solution that concentration is 4 ~ 20mg/mL;
B, the preparation of the cotton of load nano silver wire
Getting cotton, infiltrate in the obtained nano silver wire solution of steps A, then take out, is dry 5 ~ 30min in the baking oven of 70 ~ 100 DEG C in temperature;
This step repeats 1 ~ 5 time, obtains the cotton of described load nano silver wire;
C, the preparation of stretchable conducing composite material
The cotton of the load nano silver wire obtained by step B puts into mould, then after pouring PDMS performed polymer into mould, vacuum drying oven 30 ~ 100min put into by mould, and then mould being put into temperature is reaction 1 ~ 5h after the baking oven of 50 ~ 120 DEG C, obtains described stretchable conducing composite material.
The present invention is technical scheme further, and in step, the preparation process of described nano silver wire solution is as follows:
First, get PVP and join in glycerol, be heated to 90 DEG C, until PVP dissolves completely; Then, after being cooled to 50 DEG C, add Silver Nitrate, glycerol, sodium-chlor, water successively, stir and quickly heat up to 210 DEG C simultaneously; Stop heating, the mixing solutions obtained is poured in beaker, add with mixed liquor volume than the deionized water for 0.8:1 ~ 1.2:1, stir, after leaving standstill a week, remove supernatant, after the bottom nano silver wire cleaning of acquisition, obtain described nano silver wire solution.
The present invention is technical scheme further, and in stepb, cotton, before infiltration is in nano silver wire solution, is got bulk, sheet or strip by described cotton.
The present invention is technical scheme further, in step C, described PDMS performed polymer be by dimethyl siloxane performed polymer and solidifying agent in mass ratio 10:1 mix and make; Described solidifying agent is octamethylcyclotetrasiloxane.
A kind of stretchable conducing composite material as above is used as wire.
The present invention will be explained below.
A kind of stretchable conducing composite material, it is by after cotton load nano silver wire, wraps up the stretchable conducing composite material of formation with PDMS.
A preferred embodiment of the present invention, described cotton is fluffy degrease cotton, its density≤0.07g/cm
3.
Cotton fiber is a kind of common and cheap material, and the network structure that natural formation is fluffy in atmosphere, possesses the most important condition preparing elastic conduction matrix material.Can be used for preparing novel elastic composite by after itself and electrical-conductive nanometer Material cladding.
The present invention use cotton loft higher, the nano silver wire of load is more, prepare can elastomeric compositions electroconductibility better, tensility is better.
The present invention utilizes the network structure of cotton, overcomes and utilizes merely nano silver wire to prepare reunion in matrix material, disperse unequal problem; Utilize the conductive structure in its Topological expansion matrix material simultaneously, improve the conductivity under its pulled out condition.
Another preferred embodiment of the present invention, described nano silver wire is bar-shaped, its diameter >=8 μm.
The nano silver wire AgNWs layer of load on cotton fiber is close and evenly, it forms the conductive path in elastic composite, can effectively reduce its resistance, improve its electric conductivity.The longer the better for described nano silver wire.
Can the conductive network of the deformation such as bending stretch based on being formed after the network structure nano silver wire load of cotton.Nano silver wire and cotton wetting property good.
A preparation method for above-mentioned stretchable conducing composite material, it comprises the following steps:
A, the preparation of nano silver wire solution
First, nano silver wire is dissolved in ethanol or Virahol, obtains the nano silver wire solution that concentration is 4 ~ 20mg/mL;
In the nano silver wire solution of above-mentioned concentration, only carry out the preparation of stretchable conducing composite material, close and uniform silver nanowire layer could be obtained.
B, the preparation of the cotton of load nano silver wire
Getting cotton, infiltrate in the obtained nano silver wire solution of steps A, then take out, is dry 5 ~ 30min in the baking oven of 70 ~ 100 DEG C in temperature;
This step repeats 1 ~ 5 time, obtains the cotton of described load nano silver wire;
Repeatedly repeat to be to increase silver nanowire layer density on cotton fiber and uniformity coefficient, making the more nano silver wire of its load, to obtain the higher matrix material of electric conductivity.
C, the preparation of stretchable conducing composite material
The cotton of the load nano silver wire obtained by step B puts into mould, then after pouring PDMS performed polymer into mould, vacuum drying oven 30 ~ 100min put into by mould, and then mould being put into temperature is reaction 1 ~ 5h after the baking oven of 50 ~ 120 DEG C, obtains described stretchable conducing composite material.
The present invention is technical scheme further, and in step, the preparation process of described nano silver wire solution is as follows:
First, get PVP and join in glycerol, be heated to 90 DEG C, until PVP dissolves completely; Then, after being cooled to 50 DEG C, add Silver Nitrate, glycerol, sodium-chlor, water successively, stir and quickly heat up to 210 DEG C simultaneously; Stop heating, the mixing solutions obtained is poured in beaker, add with mixed liquor volume than the deionized water for 0.8:1 ~ 1.2:1, stir, after leaving standstill a week, remove supernatant liquid, after obtaining the cleaning of bottom nano silver wire, obtain described nano silver wire solution.
The all ingredients added in the preparation method of nano silver wire solution of the present invention carries out corresponding preparation by the concentration of the nano silver wire solution obtained.
The present invention is technical scheme further, and in stepb, cotton, before infiltration is in nano silver wire solution, is got bulk, sheet or strip by described cotton.
The present invention is technical scheme further, in step C, described PDMS performed polymer be by dimethyl siloxane performed polymer and solidifying agent in mass ratio 10:1 mix and make; Described solidifying agent is octamethylcyclotetrasiloxane.
A kind of stretchable conducing composite material as above is used as wire.The bulb brightness of path can be ensured in the deformation situations such as the present invention prepares stretchable conducing composite material in the conductive path closed, stretching bending at it, prove its stretching conductivity.This material can circulate 100 times and keep good conductivity under 50% deformation.
[beneficial effect]
The present invention compared with prior art, has following beneficial effect:
Preparation method of the present invention utilizes the network structure of cotton, overcomes and utilizes merely nano silver wire to prepare reunion in matrix material, disperse unequal problem; Utilize the conductive structure in its Topological expansion matrix material group simultaneously, improve the conductivity under its pulled out condition.
The stretchable flexible conductive composite material that the present invention obtains still keeps excellent electroconductibility under certain deformation repeatedly Circulation.
And stretchable conducing composite material prepared by the present invention can be used as wire, can be used for comprising bending display screen, the field such as flexible sensor, wearable electronic.
Accompanying drawing explanation
Fig. 1 is nano silver wire solution scanning electron microscope (SEM) photograph prepared by the embodiment of the present invention 1;
Fig. 2 is the cotton scanning electron microscope (SEM) photograph that the present invention uses;
Fig. 3 is the scanning electron microscope (SEM) photograph of cotton load nano silver wire in the embodiment of the present invention 1;
Fig. 4 is the scanning electron microscope (SEM) photograph of the embodiment of the present invention 2 cotton load nano silver wire;
Fig. 5 is the resistance change curves under stretchable conducing composite material 50% deformation of the embodiment of the present invention 1 and 2 preparation, and 1 shown in figure is infiltration 1 time; 3 is infiltration 3 times;
Fig. 6 is the resistance change curves after lower 1000 stretchings of stretchable conducing composite material 50% deformation prepared by the embodiment of the present invention 1 and 2, and numerical value shown in figure is the number of times stretched.
Embodiment
Below in conjunction with embodiments of the invention, the invention will be further elaborated.
Embodiment 1:
A preparation method for stretchable conducing composite material, it comprises the following steps:
A, the preparation of nano silver wire solution
Get PVP5.86g to join in 190mL glycerol, be heated to 90 DEG C, until it dissolves completely.Then temperature is down to 50 DEG C, adds 1.58gAgNO successively
3, 10mL glycerol, 59mgNaCl, 0.5mlH
2after O, when stirring, be heated to 210 DEG C at 25min.Stop heating, after mixing solutions being poured into beaker, add the deionized water of 200mL.After one week, remove supernatant liquid, utilize Virahol to clean bottom nano silver wire, obtain nano silver wire solution, carry out electron-microscope scanning,
As shown in Figure 1, gained nano silver wire is bar-shaped;
B, the preparation of the cotton of load nano silver wire
Getting density is 0.039g/cm
3as shown in Figure 2, infiltrate in the obtained nano silver wire solution of steps A, then take out, be dry 10min in the baking oven of 70 ~ 100 DEG C in temperature to degrease cotton; Obtain the cotton of load nano silver wire, electron-microscope scanning as shown in Figure 3.
Cotton as shown in Figure 2 has loose network structure, more smooth on fiber; As shown in Figure 3, on the load nano silver wire cotton fiber after infiltration and have nano silver wire between grid, define the network structure of electrical-conductive nanometer material;
C, the preparation of stretchable conducing composite material
First, the model that dimethyl siloxane performed polymer and Dow Corning Corporation that the trade mark provided with Dow Corning Corporation is SYLGARD184 provide be the octamethylcyclotetrasiloxane of SYLGARD184 in mass ratio for 10:1 mixes, obtain described PDMS performed polymer.
The cotton of the load nano silver wire obtained by step B puts into mould, then after PDMS performed polymer being imported mould, vacuum drying oven 30 ~ 100min put into by mould, and then mould being put into temperature is reaction 1 ~ 5h after the baking oven of 50 ~ 120 DEG C, obtains described stretchable conducing composite material.
In order to detect the electric conductivity of stretchable conducing composite material, in the preparation of step C, the cotton two ends of load nano silver wire are utilized silver-colored wire electricity glue and conductive line fabrication electrode.
Embodiment 2
Only different from the number of times that embodiment 1 infiltrates in nano silver wire solution, the present embodiment infiltrates 3 times, and all the other steps are consistent.As shown in Figure 4, its cotton fibre surface nano silver wire concentration obviously increases the cotton of the load nano silver wire obtained, and further increases the conductivity of stretchable conducing composite material.
Electrode is utilized to carry out the detection of conductivity embodiment 1 and embodiment 2.Obtained stretchable conducing composite material tests its resistance change as shown in Figure 5 under stretching, the condition such as bending.Infiltrate the elastic conducting material once prepared afterwards and there is good conductivity; Contrast finds, after infiltrating for three times, the elastic conducting material conductivity of its matrix material is more excellent.For confirming the stability in its matrix material repeated stretching situation, stretched by prepared matrix material 1000 times, known to Fig. 6, matrix material stretches at 1000 times and still keeps excellent conductivity.
Using stretchable conducing composite material as wire, set up a conductive path.Bulb in path stretches 0% at electro-conductive material, still keeps same brightness when 100% deformation, confirms the conductivity of matrix material excellence.
The present invention utilizes the network structure of cotton, overcomes and utilizes merely nano silver wire to prepare reunion in matrix material, disperse unequal problem; Utilize the conductive structure in its Topological expansion matrix material group simultaneously, improve the conductivity under its pulled out condition.
Although with reference to explanatory embodiment of the present invention, invention has been described here, above-described embodiment is only the present invention's preferably embodiment, embodiments of the present invention are not restricted to the described embodiments, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.
Claims (8)
1. a stretchable conducing composite material, is characterized in that it is by after cotton load nano silver wire, wraps up the conducing composite material that can stretch of formation with PDMS.
2. stretchable conducing composite material according to claim 1, is characterized in that described cotton is fluffy degrease cotton, its density≤0.07g/cm
3.
3. stretchable conducing composite material according to claim 1, is characterized in that described nano silver wire is bar-shaped, its diameter >=8 μm.
4. a preparation method for the stretchable conducing composite material described in claims 1 to 3 any one, is characterized in that it comprises the following steps:
A, the preparation of nano silver wire solution
First, nano silver wire is dissolved in ethanol or Virahol, obtains the nano silver wire solution that concentration is 4 ~ 20mg/mL;
B, the preparation of the cotton of load nano silver wire
Getting cotton, infiltrate in the obtained nano silver wire solution of steps A, then take out, is dry 5 ~ 30min in the baking oven of 70 ~ 100 DEG C in temperature;
This step repeats 1 ~ 5 time, obtains the cotton of described load nano silver wire;
C, the preparation of stretchable conducing composite material
The cotton of the load nano silver wire obtained by step B puts into mould, then after pouring PDMS performed polymer into mould, vacuum drying oven 30 ~ 100min put into by mould, and then mould being put into temperature is reaction 1 ~ 5h after the baking oven of 50 ~ 120 DEG C, obtains described stretchable conducing composite material.
5. the preparation method of stretchable conducing composite material according to claim 4, is characterized in that in step, and the preparation process of described nano silver wire solution is as follows:
First, get PVP and join in glycerol, be heated to 90 DEG C, until PVP dissolves completely; Then, after being cooled to 50 DEG C, add Silver Nitrate, glycerol, sodium-chlor, water successively, stir and quickly heat up to 210 DEG C simultaneously; Stop heating, the mixing solutions obtained is poured in beaker, add with mixed liquor volume than the deionized water for 0.8:1 ~ 1.2:1, stir, after leaving standstill a week, remove supernatant liquid, after the bottom nano silver wire cleaning of acquisition, obtain described nano silver wire solution.
6. the preparation method of stretchable conducing composite material according to claim 4, is characterized in that in stepb, and cotton, before infiltration is in nano silver wire solution, is got bulk, sheet or strip by described cotton.
7. the preparation method of stretchable conducing composite material according to claim 4, is characterized in that in step C, described PDMS performed polymer be by dimethyl siloxane performed polymer and solidifying agent in mass ratio 10:1 mix and make; Described solidifying agent is octamethylcyclotetrasiloxane.
8. the stretchable conducing composite material as described in any one of claims 1 to 3 is used as wire.
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Cited By (9)
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| CN105761949A (en) * | 2016-04-08 | 2016-07-13 | 华南理工大学 | Silver nanowire-based electric conduction cotton cloth, preparation method therefor and application thereof |
| CN106084268A (en) * | 2016-06-15 | 2016-11-09 | 东华大学 | A kind of preparation method of nano silver wire/dimethyl silicone polymer laminated film |
| CN106129040A (en) * | 2016-07-21 | 2016-11-16 | 北京科技大学 | A kind of stretchable conductor cable and preparation method thereof |
| CN107068235A (en) * | 2017-03-06 | 2017-08-18 | 华东理工大学 | A kind of three-dimensional stretchable conductive material and preparation method thereof |
| CN107907255A (en) * | 2017-10-17 | 2018-04-13 | 天津大学 | Pulling force sensor preparation method based on carbon black silver nano-grain composite material |
| CN109799663A (en) * | 2019-01-25 | 2019-05-24 | 中山大学 | Electronics paper product and its packaging method based on stretchable substrate |
| CN112980126A (en) * | 2021-02-22 | 2021-06-18 | 青岛科技大学 | Self-repairing stretchable electrode and preparation method and application thereof |
| CN114773823A (en) * | 2022-04-18 | 2022-07-22 | 中国科学技术大学 | Viscoelastic polymer composite conductive material and preparation method and application thereof |
| CN114794625A (en) * | 2022-04-14 | 2022-07-29 | 浙江理工大学 | Manufacturing method of intelligent waistband based on loofah sponge sensor |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761949A (en) * | 2016-04-08 | 2016-07-13 | 华南理工大学 | Silver nanowire-based electric conduction cotton cloth, preparation method therefor and application thereof |
| CN106084268A (en) * | 2016-06-15 | 2016-11-09 | 东华大学 | A kind of preparation method of nano silver wire/dimethyl silicone polymer laminated film |
| CN106129040A (en) * | 2016-07-21 | 2016-11-16 | 北京科技大学 | A kind of stretchable conductor cable and preparation method thereof |
| CN107068235A (en) * | 2017-03-06 | 2017-08-18 | 华东理工大学 | A kind of three-dimensional stretchable conductive material and preparation method thereof |
| CN107068235B (en) * | 2017-03-06 | 2019-04-19 | 华东理工大学 | A kind of stretchable conductive material of three-dimensional and preparation method thereof |
| CN107907255A (en) * | 2017-10-17 | 2018-04-13 | 天津大学 | Pulling force sensor preparation method based on carbon black silver nano-grain composite material |
| CN107907255B (en) * | 2017-10-17 | 2020-10-23 | 天津大学 | Preparation method of tension sensor based on carbon black-silver nanoparticle composite material |
| CN109799663A (en) * | 2019-01-25 | 2019-05-24 | 中山大学 | Electronics paper product and its packaging method based on stretchable substrate |
| CN112980126A (en) * | 2021-02-22 | 2021-06-18 | 青岛科技大学 | Self-repairing stretchable electrode and preparation method and application thereof |
| CN114794625A (en) * | 2022-04-14 | 2022-07-29 | 浙江理工大学 | Manufacturing method of intelligent waistband based on loofah sponge sensor |
| CN114773823A (en) * | 2022-04-18 | 2022-07-22 | 中国科学技术大学 | Viscoelastic polymer composite conductive material and preparation method and application thereof |
| CN114773823B (en) * | 2022-04-18 | 2024-02-23 | 中国科学技术大学 | Viscoelastic polymer composite conductive material and preparation method and application thereof |
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