CN110284210A - A kind of inside has the flexible extensible fiber and the preparation method and application thereof of micro-structure - Google Patents
A kind of inside has the flexible extensible fiber and the preparation method and application thereof of micro-structure Download PDFInfo
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- CN110284210A CN110284210A CN201910523381.4A CN201910523381A CN110284210A CN 110284210 A CN110284210 A CN 110284210A CN 201910523381 A CN201910523381 A CN 201910523381A CN 110284210 A CN110284210 A CN 110284210A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/76—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from other polycondensation products
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- General Chemical & Material Sciences (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
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Abstract
The present invention using corona treatment, stick by being applied, being pre-stretched, replicated and the technologies preparation flexible extensible fiber such as shift and roll; the amplitude and width of internal continuous wavy micro-structure can be regulated and controled by regulating and controlling the size of prestretching stretching strain; to realize the regulation of different stretch sensitivity; in addition, rolling stability and recycling that the internal helicoid layer structure to be formed is conducive to protect inner conductive material.The present invention has many advantages, such as that preparation method is simple, at low cost, structure is controllable and is conducive to realize large-scale production, utilize clothing knitting skill, it can be made into the fabric with strain sensing and flexible interconnection function, there is huge application potential on flexible wearable electronic device.
Description
Technical field
The present invention relates to the flexible extensible fibers that a kind of inside has micro-structure, relate further specifically to the preparation side of the fiber
Method and application.
Background technique
With the continuous development of science and technology, in recent years, wearable fitness and entertainment equipment constantly enters into people
The visual field, bring huge change and raising to people's production and life mode.And with the increase of people's demand and
Scientific research is constantly progressive, these wearable fitness and entertainment equipment are become having light and handy, portable and bio-compatibility etc.
The flexible wearable electronic product of feature becomes a kind of trend of mainstream.On the one hand, these flexible wearable electronic products can
Bring simpler direct operating experience, at the same again can the physiological health activity in real time to human body be monitored.
On the other hand, due to the deficiencies in the prior art, how to be still suffered from and chosen using the technique of low cost, high efficiency large-scale production
War.
In flexible wearable electronic product, flexible strain transducer and flexible interconnection conductor are its important components,
For this purpose, people also conduct extensive research this two kinds of flexible electronics.Patent of invention before us proposes respectively
A kind of a kind of method and three-dimensional structure with highly sensitive stretchable strain transducer prepared based on micro-crack mechanism
Composite material is used for flexible interconnection conductor, both flexible wearable electronic materials have important application value.Guangxi University
A kind of utilization graphene oxide dispersion and multi-walled carbon nanotube aqueous solution are given, is then carried out at ultrasonic wave after mixing
Reason adds to place after sealing in implantation glass pipe after anti-bad sepsis acid and be reacted in baking oven, a kind of flexible fiber electricity is made
The preparation method of pole has good chemical property and mechanical property.Institutes Of Technology Of Zhejiang is prepared by solution mixing method
Compliant conductive fiber, wherein with Styrene-Butadiene-Styrene Block Copolymer (styrene-butadiene-benzene second
Alkene block copolymer) it is flexible substrates, using poly- 3,4-rthylene dioxythiophene-polystyrolsulfon acid-graphene as conductive material, and
With silver nanowires modified electrode, a kind of s-B-S/graphene/poly- 3 based on silver nanowires modification are obtained,
4- ethene dioxythiophene-polystyrolsulfon acid flexible fiber sensor electrode is used for the fields such as medical biological monitoring.
In addition, Hua Xiang (China) Gao Xian Co., Ltd gives based on quiet for the research with micro-structure flexible fiber
Electrospinning process and one kind of establishment winding weaving have high-ratio surface porous fibre and preparation method thereof.South Korea is at Jun Guan university
Siyeon Jang et al. propose a kind of carbon-based superlastic there is the fiber of hierarchical structure to be used for flexible strain transducer, can be with
Monitoring human body is bent over and ancon activity.The method that Yunmeng Zhao of Monash University et al. uses dry spinning
It is prepared for a kind of stretchable conductive fiber of gold/elastomeric interface structure inspired by moss, in wearable weaving electronic field
With important application potentiality.Xiaodong Wu of macromolecule research institute, Sichuan University et al. is using spraying conductive material in flexibility
In substrate and the mode rolled, a kind of conducing composite material fiber of telescopic in height has been prepared.
By the above-mentioned summary to flexible strain transducer and flexible interconnection conductor progress it can be found that although at present
People have been achieved for certain progress to the research of both flexible electronics, but how to realize low cost, method letter
Singly preparing the flexible strain transducer that can be mass produced and flexible interconnection conductor material still has very big challenge, together
When, how to realize that the flexible strain transducer of controllability preparation different application demand and flexible interconnection are led on a kind of flexible material
Body is also a problem.
Summary of the invention
For current flexible strain transducer is at high cost, preparation method is complicated, tensility is lower, sensitivity regulation degree is low
The features such as, and flexible strain transducer with flexible interconnection conductor as two kinds of different materials from working mechanism with certain contradiction point
Material has the characteristics that at low cost, preparation method is simple, tensility is higher, sensitivity is controllable the present invention provides a kind of
Flexible electronics and preparation method thereof.It is applied by corona treatment, stick and the technologies such as pre-stretching is obtained first with wave
The masterplate material of shape micro-structure prepares the internal flexible extensible fibre with micro-structure by replicating the methods of to shift, roll
Dimension both can be used for according to actual needs flexible interconnection and lead by realizing the control to internal continuous wave wave-like microstructure appearance
Body can be used for flexible wearable strain transducer, realizes the structure-controllable on a kind of fiber and has different application function
The preparation of the flexible extensible fiber of energy.By can be made into after the fiber and apparel fabrics Co-knit with strain sensing
The fabric of function and flexible interconnection function.
In a first aspect, the present invention provides a kind of inside have micro-structure flexible extensible fiber, the fiber be by
Stick applies electrical-conductive nanometer material after the polymeric base material of pre-stretching carries out hydrophily processing, then discharges pre-tensile stress and obtains
Continuous wavy micro-structure is then turned the continuous wavy micro-structure and electrical-conductive nanometer material by way of duplication transfer
Another new surface of polymer material is moved to, is then obtained by the way of rolling new polymer material internal with micro-structure
Flexible extensible fiber.
Preferably, the polymeric base material is dimethyl silicone polymer (PDMS).
Preferably, the nanometer conductive material is selected from metal nanometer line, graphene, carbon nanotube, metal nanoparticle
It is one or more, the preferably composite material of graphene and silver nanowires, the Yin Na that the silver nanowires is 20-200 μm of length
Rice noodles.
Preferably, the new polymer material be selected from the composition of dimethyl silicone polymer and curing agent, polyurethane,
Ecoflex, the preferably described polymer are the composition of dimethyl silicone polymer and curing agent.
Second aspect, the present invention provide the flexible extensible fiber that a kind of inside as described in relation to the first aspect has micro-structure
Preparation method, the preparation method comprises the following steps:
(1) it after polymeric base material being cut into the strip with certain size, is placed on pre-stretching fixture and clamps
Both ends, applying certain strain makes polymeric base material be stretched, by the polymer matrix ground under this tensional state
Material is placed in plasma atmosphere after progress hydrophily processing, using the method that stick applies in the polymeric base material table being stretched
Face is uniformly coated with the aqueous nancomposite dispersion liquid of graphene and silver nanowires and dries；
(2) it is made to be restored to initial original length by way of discharging external prestress the polymeric base material after drying
State is simultaneously paved on the glass sheet, the new polymerization of uniform drop coating on the surface for the composite material that it is coated with graphene and silver nanowires
Object material PDMS pre-polymer solution simultaneously solidifies, and removes new polymer material PDMS from polymeric substrates after solidification；
(3) the new polymer material PDMS that removing obtains is had and shifts the compound of obtained graphene and silver nanowires
The one side of material upward, and after the both ends at middle part are stained with thin copper foil with conductive silver paste respectively, along vertical original pre-stretching
New PDMS is rolled in direction, is rolled onto after last tail portion PDMS pre-polymer solution blocks and solidify, and obtains internal having micro-structure
Flexible extensible fiber.
As the optimal technical scheme of the method for the invention, the strip shaped polymer of certain size described in step (1)
Base material length be 1~100cm, such as 1cm, 5cm, 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm,
90cm,100cm；Width be 1~100cm, such as 1cm, 5cm, 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm,
80cm,90cm,100cm；With a thickness of 50~1000 μm, such as 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, 500 μm, 600 μ
M, 700 μm, 800 μm, 900 μm, 1000 μm；Pre-stretching operation it is certain strain be 0%~500%, such as 0%, 10%,
30%, 50%, 100%, 150%, 200%, 250%, 300%, 350%, 400%, 450%, 500%.
As the optimal technical scheme of the method for the invention, hydrophily is carried out in gas ions atmosphere described in step (1)
The machine power of processing be 1W~100W, such as 1W, 5W, 10W, 15W, 20W, 25W, 30W, 35W, 40W, 45W, 50W, 55W,
60W,65W,70W,75W,80W,85W,90W,95W,100W；Time be 1~30min, for example, 1min, 5min, 10min,
15min、20min、25min、30min。
As the optimal technical scheme of the method for the invention, it is being stretched described in step (1) using stick coating method
In the aqueous nancomposite dispersion liquid of the graphene that polymeric base material surface is uniformly coated with and silver nanowires, graphene concentration is
1~20mg/mL, such as 1mg/mL, 5mg/mL, 10mg/mL, 15mg/mL, 20mg/mL；Silver nanowires concentration is 1~10mg/
ML, 1mg/mL, 2mg/mL, 4mg/mL, 6mg/mL, 8mg/mL, 10mg/mL；Coating post-baking temperature is 20~90 DEG C, such as 20
℃,25℃,30℃,35℃,40℃,45℃,50℃,55℃,60℃,65℃,70℃,75℃,80℃,85℃,90℃；Drying
Time be 30~90min, such as 30min, 35min, 40min, 45min, 50min, 55min, 60min, 65min, 70min,
75min、80min、85min、90min。
Preferably, the volume ratio of graphene and silver nanowire composite material aqueous dispersions is 1:0.1~1, such as 1:
0.1,1:0.2,1:0.3,1:0.4,1:0.5,1:0.6,1:0.7,1:0.8,1:0.9 or 1:1 etc..
Preferably, in silver nanowires solution, the length of silver nanowires is 20~200 μm, preferably 50~120 μm, such as 50 μ
M, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, 105 μm, 110 μm, 115 μm or 120 μm
Deng；Diameter is 30~70nm, preferably 40~60nm, such as 40nm, 45nm, 50nm, 55nm or 60nm etc..
As the optimal technical scheme of the method for the invention, step (2) PDMS is dimethylsilane and curing agent
Compounding substances form flexible solid material after solidification.Wherein, the mass ratio of dimethylsilane used and curing agent be 20~
5:1, for example, 20:1,18:1,15:1,
12:1,10:1,8:1 or 5:1 etc., preferably 10:1.The solidification temperature be 60 DEG C~90 DEG C, such as 60 DEG C, 65 DEG C,
70 DEG C, 75 DEG C, 80 DEG C, 85 DEG C, 90 DEG C etc., preferably 70 DEG C.The curing time be 1~5h, such as 1h, 1.5h, 2h, 2.5h,
3h、3.5h、4h、4.5h、
5h etc., preferably 3h.
As the optimal technical scheme of the method for the invention, step (3) both ends in the middle part of new PDMS refer to
After new PDMS tiling, the one side of the composite material with the obtained graphene of transfer and silver nanowires upward, in both ends
Between and the position that is no more than in 20% range of middle position, such as middle position range 1%, 5%, 10%, 15%, 20%.
As the optimal technical scheme of the method for the invention, step (3) solidification temperature is 50~90 DEG C, such as 50
DEG C, 55 DEG C, 60 DEG C, 65 DEG C, 70 DEG C, 75 DEG C, 80 DEG C, 85 DEG C or 90 DEG C etc.；The curing time be 1~5h, such as 1h,
1.5h, 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 5h etc., preferably 3h.
The third aspect, the present invention, which provides a kind of inside, has the flexible extensible fiber of micro-structure can as flexible extensible
Dress the purposes of strain transducer and flexible interconnection conductor.
Compared with prior art, the present invention using corona treatment, stick by being applied, pre-stretching, replicating and shift and roll
Etc. technologies prepare flexible extensible fiber, internal continuous wavy micro- knot can be regulated and controled by regulating and controlling the size of prestretching stretching strain
The amplitude and width of structure, so that the regulation of different stretch sensitivity is realized, in addition, rolling the internal helicoid layer structure to be formed has
Conducive to the stability and recycling of protection inner conductive material.Simple, at low cost, structure can with preparation method by the present invention
Regulate and control and be conducive to the advantages that realizing large-scale production, using clothing knitting skill, can be made into has the function of strain sensing and flexibility
The fabric of interconnection function has huge application potential on flexible wearable electronic device.
Specific embodiment
Embodiment 1
By polymeric base material be cut into after long 100 μm of 60cm wide 30cm thickness of strip, be placed in pre-stretching folder
On tool and both ends are clamped, applying 10% strain makes polymer matrix
Bottom material is stretched, by the polymeric base material under this tensional state be placed in plasma atmosphere into
The processing of row hydrophily, wherein machine power is 10W, and time 10min is being stretched after hydrophily processing using the method that stick applies
Polymeric base material surface be uniformly coated with the aqueous nancomposite dispersion liquid of graphene and silver nanowires and dry, wherein moisture
Graphene concentration is 10mg/L in dispersion liquid, and silver nanowires concentration is 6mg/L, and the length of silver nanowires is 50 μm, diameter 50nm,
The two volume ratio is 1:1；50 DEG C of drying temperature, time 50min.
It is set to be restored to initial original length shape by way of discharging external prestress the polymeric base material after drying
State is simultaneously paved on the glass sheet, the new polymer of uniform drop coating on the surface for the composite material that it is coated with graphene and silver nanowires
Material PDMS pre-polymer solution simultaneously solidifies, and wherein the mass ratio of PDMS and curing agent is 10:1, solidification temperature in PDMS prepolymer
70 DEG C, curing time 3h, new polymer material PDMS is removed from polymeric substrates after solidification；
Composite wood of the new polymer material PDMS that removing is obtained with transfer obtained graphene and silver nanowires
The one side of material upward, and is stained with thin copper foil with conductive silver paste respectively no more than the position in middle position 20% among both ends
Afterwards, new polymer material PDMS is rolled along vertical original pre-stretching direction, is rolled onto last tail portion PDMS pre-polymer solution
It blocks and solidifies, wherein the mass ratio of PDMS and curing agent is 10:1 in PDMS prepolymer, and 70 DEG C of solidification temperature, curing time is
3h obtains the internal flexible extensible fiber with micro-structure after solidification.
According to existing conventional techniques, wearable strain transducer is made in above-mentioned flexible extensible fiber.
Embodiment 2
By polymeric base material be cut into after long 200 μm of 100cm wide 50cm thickness of strip, be placed in pre-stretching folder
On tool and both ends are clamped, applying 100% strain makes polymeric base material be stretched, will be poly- under this tensional state
Polymer substrates material is placed in plasma atmosphere progress hydrophily processing, and wherein machine power is 100W, time 30min,
Graphene and silver nanoparticle are uniformly coated on the polymeric base material surface being stretched using the method that stick applies after hydrophily processing
The aqueous nancomposite dispersion liquid of line is simultaneously dried, and wherein graphene concentration is 20mg/L in aqueous dispersions, and silver nanowires concentration is
10mg/L, the length of silver nanowires are 50 μm, diameter 50nm, and the two volume ratio is 1:1；50 DEG C of drying temperature, the time
50min。
It is set to be restored to initial original length shape by way of discharging external prestress the polymeric base material after drying
State is simultaneously paved on the glass sheet, the new polymer of uniform drop coating on the surface for the composite material that it is coated with graphene and silver nanowires
Material PDMS pre-polymer solution simultaneously solidifies, and wherein the mass ratio of PDMS and curing agent is 10:1, solidification temperature in PDMS prepolymer
70 DEG C, curing time 3h, new polymer material PDMS is removed from polymeric substrates after solidification；
Composite wood of the new polymer material PDMS that removing is obtained with transfer obtained graphene and silver nanowires
The one side of material upward, and is stained with thin copper foil with conductive silver paste respectively no more than the position in middle position 20% among both ends
Afterwards, new polymer material PDMS is rolled along vertical original pre-stretching direction, is rolled onto last tail portion PDMS pre-polymer solution
It blocks and solidifies, wherein the mass ratio of PDMS and curing agent is 10:1 in PDMS prepolymer, and 70 DEG C of solidification temperature, curing time is
3h obtains the internal flexible extensible fiber with micro-structure after solidification.
According to existing conventional techniques, flexible interconnection conductor is made in above-mentioned flexible extensible fiber.
Comparative example 1
Polymeric base material is cut into long 200 μm of 100cm wide 50cm thickness of length
After strip, it is placed in plasma atmosphere progress hydrophily processing, wherein machine power is 50W, and the time is
20min is uniformly coated with graphene and silver nanowires on polymeric base material surface using the method that stick applies after hydrophily processing
Aqueous nancomposite dispersion liquid and dry, wherein in aqueous dispersions graphene concentration be 20mg/L, silver nanowires concentration be 10mg/
L, the length of silver nanowires are 50 μm, diameter 50nm, and the two volume ratio is 1:1；50 DEG C of drying temperature, time 50min.
Polymeric base material after drying is paved on the glass sheet, is coated with the compound of graphene and silver nanowires at it
The new polymer material PDMS pre-polymer solution of the uniform drop coating in the surface of material simultaneously solidifies, wherein PDMS and solid in PDMS prepolymer
The mass ratio of agent is 10:1,
70 DEG C of solidification temperature, curing time 3h, new polymer material PDMS is removed from polymeric substrates after solidification；
Composite wood of the new polymer material PDMS that removing is obtained with transfer obtained graphene and silver nanowires
The one side of material upward, and is stained with thin copper foil with conductive silver paste respectively no more than the position in middle position 20% among both ends
Afterwards, new polymer material PDMS is rolled along width direction, is rolled onto last tail portion PDMS pre-polymer solution and is blocked and solidify,
Wherein the mass ratio of PDMS and curing agent is 10:1 in PDMS prepolymer, 70 DEG C of solidification temperature, curing time 3h, is obtained after solidification
To the internal flexible extensible fiber with micro-structure.
According to existing conventional techniques, above-mentioned flexible extensible fiber is made.
Embodiment 1-2 compared with comparative example 1 it can be found that although comparative example 1 also obtains flexible extensible fiber,
Since it does not carry out pre-stretching operation to polymeric base material, internal continuous wavy micro-structure cannot be obtained,
Also it cannot achieve the controllable operating of the internal microstructure to flexible extensible fiber, and then the flexible fiber prepared cannot achieve
Application accurately towards flexible extensible wearable strain transducer and flexible interconnection conductor.
Protection scope of the present invention should be defined by the scope defined by the claims..For the common skill of the art
For art personnel, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these are improved and profit
Decorations also should be regarded as protection scope of the present invention.
Claims (10)
1. the flexible extensible fiber that a kind of inside has micro-structure, which is characterized in that the fiber is the polymerization that will be pre-stretched
Stick applies electrical-conductive nanometer material after object base material carries out hydrophily processing, and then release pre-tensile stress obtains continuous wavy micro-
The continuous wavy micro-structure and electrical-conductive nanometer material are then transferred to by way of duplication transfer another new by structure
Then surface of polymer material obtains the internal flexible extensible with micro-structure by the way of rolling new polymer material
Fiber；
Preferably, the polymeric base material is dimethyl silicone polymer (PDMS)；
Preferably, the nanometer conductive material is selected from metal nanometer line, graphene, carbon nanotube, one kind of metal nanoparticle
Or a variety of, the preferably composite material of graphene and silver nanowires, the silver nanowires that the silver nanowires is 20-200 μm of length；
Preferably, the new polymer material be selected from the composition of dimethyl silicone polymer and curing agent, polyurethane,
Ecoflex, the preferably described polymer are the composition of dimethyl silicone polymer and curing agent.
2. the preparation method that a kind of inside has the flexible extensible fiber of micro-structure, which is characterized in that the preparation method packet
Include following steps:
(1) after polymeric base material being cut into the strip with certain size, both ends are placed on pre-stretching fixture and clamp,
Applying certain strain makes polymeric base material be stretched, and the polymeric base material under this tensional state is placed in
After carrying out hydrophily processing in plasma atmosphere, the method applied using stick is uniform on the polymeric base material surface being stretched
The aqueous nancomposite dispersion liquid for alkene and the silver nanowires of graphiting simultaneously is dried；
(2) it is made to be restored to initial original length state by way of discharging external prestress the polymeric base material after drying
And it paves on the glass sheet, another new polymerization of uniform drop coating on the surface for the composite material that it is coated with graphene and silver nanowires
Object material PDMS pre-polymer solution simultaneously solidifies, and removes new polymer material PDMS from polymeric substrates after solidification；
(3) composite material of the new polymer material PDMS for obtaining removing with transfer obtained graphene and silver nanowires
One side upward, and after the both ends at middle part are stained with thin copper foil with conductive silver paste respectively, along vertical original pre-stretching direction
New PDMS is rolled, is rolled onto after last tail portion PDMS pre-polymer solution blocks and solidify, obtains internal there is the soft of micro-structure
The stretchable fiber of property.
3. fiber producing processes as claimed in claim 2, which is characterized in that the strip of certain size described in step (1)
The length of polymeric base material is 1~100cm, and width is 1~100cm, with a thickness of 50~1000 μm；The one of pre-stretching operation
Fixed strain is 0%~500%.
4. fiber producing processes as claimed in claim 2, which is characterized in that carried out in gas ions atmosphere described in step (1)
The machine power of hydrophily processing is 1W~100W, and the time is 1~30min.
5. fiber producing processes as claimed in claim 2, which is characterized in that using stick coating method in quilt described in step (1)
In the polymeric base material surface graphene being uniformly coated with of stretching and the aqueous nancomposite dispersion liquid of silver nanowires, wherein institute
The concentration for stating graphene is 1~20mg/mL, and the concentration of the silver nanowires is 1~10mg/mL, the graphene and silver nanoparticle
Volume ratio both in line aqueous nancomposite dispersion liquid is 1:0.1~1, and coating post-baking temperature is 20~90 DEG C, when drying
Between be 30~90min.
6. fiber producing processes as claimed in claim 2, which is characterized in that PDMS pre-polymer solution described in step (2) is
The mass ratio of dimethylsilane and curing agent mixture matter, dimethylsilane used and curing agent be 20~5:1, preferably 10:
1, the solidification temperature is 60 DEG C~90 DEG C, and the curing time is 1~5h.
7. fiber producing processes as claimed in claim 2, which is characterized in that step (3) is described to be referred at the both ends at middle part
After new PDMS tiling, the one side of the composite material with the obtained graphene of transfer and silver nanowires upward, among both ends
And it is no more than the position in 20% range of middle position.
8. fiber producing processes as claimed in claim 2, which is characterized in that step (3) is described along vertical original pre-stretching
New PDMS is rolled in direction, is fitted closely between the layer that the tightness degree rolled will be such that PDMS often rolls.
9. a kind of preparation method of hollow structure flexible extensible Multifunction Sensor fiber described in a kind of claim 2, special
Sign is that step (3) solidification temperature is 50~90 DEG C, and the curing time is 1~5h.
10. there is the flexible extensible fiber of micro-structure to answer flexible extensible is wearable for a kind of inside described in claim 1
Become the application in sensor and flexible interconnection conductor.
Priority Applications (1)
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| CN112900080A (en) * | 2021-02-03 | 2021-06-04 | 西安交通大学 | Preparation method of composite nanofiber membrane and flexible strain sensor |
| CN112957030A (en) * | 2021-02-03 | 2021-06-15 | 西安交通大学 | Wearable flexible strain intelligent sensing system for cervical vertebra bending monitoring |
| CN114395152A (en) * | 2022-02-21 | 2022-04-26 | 浙江理工大学 | Preparation method of Ag-rGO-PDMS flexible sensor with low cost and large-area preparation |
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