CN106521805B - A kind of preparation method of conduction-toughening melt-blown compound nonwoven cloth - Google Patents
A kind of preparation method of conduction-toughening melt-blown compound nonwoven cloth Download PDFInfo
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- CN106521805B CN106521805B CN201710025191.0A CN201710025191A CN106521805B CN 106521805 B CN106521805 B CN 106521805B CN 201710025191 A CN201710025191 A CN 201710025191A CN 106521805 B CN106521805 B CN 106521805B
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
-
- 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
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
- D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/106—Radiation shielding agents, e.g. absorbing, reflecting agents
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
Abstract
The present invention provides a kind of preparation method of conduction-toughening melt-blown compound nonwoven cloth, and the non-woven fabrics is obtained by three kinds of polymer chips, one-dimensional electric Nano filling, dispersant raw materials.Its detailed process includes：(1) preparation of conductive agglomerate；(2) preparation of conduction-toughening melt-blown compound nonwoven cloth.Shearing and collision when its feature is using mixed at high speed and the synergistic effect of dispersant, then through double screw extruder extrusion one-dimensional electric Nano filling to may be implemented evenly dispersed in the polymer；One-dimensional electric Nano filling may be implemented in fibrous inside and surface along fiber axial orientation using the drawing-off effect of the high velocity, hot air in meltblown, the conductive percolation threshold of this composite material is significantly reduced while ensureing conductive network structure.This conduction-toughening can effectively realize that the structure-function of composite material is modified the effect of integrated design with melt-blown compound nonwoven cloth.Step is simple and convenient to operate, is highly practical.
Description
Technical field
The invention belongs to non-woven fabrics and its technical field of composite materials, more particularly to a kind of conduction-toughening melt-blown is compound
The preparation method of non-woven fabrics.
Background technology
Carbon fiber enhancement resin base composite material (CFRP) is because it is with high specific strength, high ratio modulus and lightweight, corrosion resistant
The advantages such as erosion, designability be strong and be widely used in aerospace field.This composite material usually using thermosetting resin as
Matrix, the low tenacity and electrical insulating property of thermosetting resin matrix make CFRP easily cause damage when being struck by lightning or low velocity impact
Wound.
For the conductive modified of CFRP, the method for mainstream is by conductive micro Nano material one both at home and abroad at present
As include spherical micro-nano conductive particle, one-dimensional carbon nanotube or metal nanometer line, two-dimensional graphene and nanometer stone
Ink sheet, the resin-rich area being added in composite material.The interlayer toughened of CFRP is modified, correlative study layer both domestic and external goes out not
Thoroughly, research is to add a kind of thermoplastic resin or particle in the resin-rich area of composite material (such as rubber particles add earlier
Add) in-situ flexible modification is carried out, some later scholars propose that the resin-rich area in composite material is laid with a kind of nano-high molecule film
Or the non-woven fabrics of areal density, high porosity carries out toughening modifying of offing normal.Wherein nano-high molecule film is usually to utilize casting film
Made of method manufacture, non-woven fabrics is usually to be produced using electrostatic spinning, spunbond or melt blown technology.Nearest CFRP's leads
The integrated designing technique of electricity-toughening modifying is gradually taken seriously.
Chinese patent (a kind of toughening non-woven fabrics and preparation method containing the coat of metal, 103552318 B of CN) is utilized
A kind of toughening non-woven fabrics containing the coat of metal, makes composite material pass through the method for chemical deposit while ensureing Toughening Properties
The conductive characteristic of composite material is greatly improved.But the method for this chemical deposit can consume a large amount of water and chemical drugs
Product cause a large amount of heavy metal pollution and the waste of water resource, and can not be carried out finely to the thickness of the coat of metal
Control, the addition of coated metal is but also entire composite material quality increased, while in the non-woven fabrics fiber-of composite material
The insufficient problem of Presence of an interface strength, leads to the decline of fracture strength between composite layer between metal-matrix resin.
Chinese patent (conductive programmable toughening non-woven fabrics and composite material, 104589743 A of CN) proposes that one kind is led
The programmable toughening non-woven fabrics of electricity and composite material.This method is that organic silver solution is coated in non-woven fabrics by arbitrary graphic pattern
Surface, it is then thermally treated again after a certain amount of solvent of volatilization removing at a certain temperature, it obtains with pattern conductive structure
Non-woven fabrics.But the process is more complicated for this conductive modified, certain dirt can be caused by handling the organic silver solution of non-woven fabrics
Dye and the wasting of resources, and the stability of this coating processes in nonwoven surface is more difficult to control, additional increased organic silver
The weight of applicator influences the weight of composite material entirety, and material cost is higher.
In Chinese patent (a kind of the conductive fiber of carbon nanotubes and preparation method thereof, 1226472 C of CN) by polyester,
Carbon nanotube and coupling agent are mixed according to certain mass ratio, are squeezed out by screw extruder and spinning technique is prepared into
Conductive fiber, its main feature is that the good conductive properties of carbon nanotube are utilized and high draw ratio prepares conductive fiber,
Coupling agent special simultaneously can enhance the interaction between carbon nanotube and polyester molecule, but be drawn used by this method
Stretching process is small to the drafting multiple of fiber, causes carbon nanotube random or degree of orientation is small in the distribution of fibrous inside, therefore this
Kind mode is limited for the function and effect for reducing the content of carbon nanotube and being formed simultaneously conductive network.Importantly, passing
In the experimental branch line technique of system, drawing process generates enough orientations insufficient for carbon nanotube to the draw ratio of fiber,
Therefore it can cause it less than the conductive percolation threshold of the carbon nanotube in the fiber when content of carbon nanotubes is relatively low, be not enough to shape
At conductive network.In addition, necessarily conductive agglomerate raw material is squeezed from different screw extruders composite spinning respectively from polyester slice
Go out, then from being sprayed in profiled-cross-section, different aperture on spinneret, and the conductive filler percentage composition in conductive agglomerate
The percentage composition being necessarily higher than in the conductive fiber finally obtained, especially when conductive filler content is higher, this may lead
The spinneret hole plug for causing conductive agglomerate raw material, is not easy smooth spinning.
To sum up, exploitation is a kind of has high conductance, higher heat-conductivity, lower conductive filler content and produces simultaneously
At low cost, production process non-environmental-pollution, the nonwoven fabric technology that the technological process of production is short, production efficiency is high, for aerospace
It is of great significance, and is in urgent need with the integrated realization of conduction-toughening modifying of carbon fiber enhancement resin base composite material.
Invention content
In order to overcome above-mentioned deficiency, the present invention to provide a kind of preparation method of conduction-toughening melt-blown compound nonwoven cloth,
Technology of preparing route is as shown in Figure 1, include：(1) preparation of conductive agglomerate specifically utilizes the height of dispersant and high-speed mixer
The double action of speed shearing and collision makes one-dimensional electric Nano filling uniformly be mixed with polymer beads, then passes through twin-screw
Extruder squeeze out prepare be uniformly dispersed, the conductive agglomerate of high concentration；(2) preparation of conduction-toughening melt-blown compound nonwoven cloth, tool
Body is to realize one-dimensional electric Nano filling in fiber using the drawing-off effect of the high velocity, hot air in melt spraying non-woven fabrics production process
Internal and surface is also ensured along fiber axial orientation to substantially reduce the conductive percolation threshold of electrically conductive composite fibre simultaneously
The excellent conductive performance of the non-woven fabrics.It is high by the non-woven fabrics porosity obtained by meltblown, fibre diameter it is thin (generally 1~
10 μm), it is convenient for the abundant infiltration of liquid thermosetting resin, forms fine two-arch tunnel structure after CFRP curing moldings,
The interlaminar fracture toughness of CFRP, the conductivity of shock resistance and thickness direction are improved in turn.In addition, the technique of melt spraying non-woven fabrics
Flow is short, product thickness and grammes per square metre are controllable, production process non-environmental-pollution, production cost are low so that it is in aerospace field
It is worth with huge applications.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of conduction-toughening melt-blown compound nonwoven cloth, the conductivity in the nonwoven thickness direction is 1.8 × 10-4~
1.0×10-1S/cm, wherein the mass fraction of one-dimensional electric Nano filling is 0.05~6%, and average fibre diameter is 1~10 μ
m。
Existing conductive fiber generally uses mechanical traction during subsequent forming, and tractive force is small, conductive filler is in fibre
The internal irregular distribution of dimension so that the conductive percolation threshold of conductive fiber is higher, cannot be satisfied the fields such as aerospace to thermoplastic
The requirement of property non woven cloth in polymer high conductivity, high-fire resistance and high-durability.For this purpose, present system has studied existing spinning
Technique prepares the arrangement rule of conductive filler in the fibre during conductive fiber, finds：It is different from common spinning technique, by
There is the drawing-off of special high-temperature high-speed airflow to act in meltblown spinning phase, the drawing-off great efforts to fiber, drawing-off
Effect may make that the one-dimensional electric Nano filling of certain draw ratio is orientated in an axial direction in the fibre, reduce leading for fiber
Electric percolation threshold makes the electric conductivity of non-woven fabrics greatly enhance.
In existing heterotypic fibre, the barrier due to abnormally-structured middle different component and larger fibre diameter, carbon nanometer
It is difficult to be cross-linked with each other between pipe component.And the present invention is realized by the drawing-off effect of high-temperature high-speed airflow and is taken to one-dimensional electric filler
To effective control, make the one-dimensional electric filler interlaced formation conductive network node (as shown in Figure 3) in somewhere in the fibre, into
And conductive network is formed, it is effectively reduced the conductive percolation threshold of non-woven fabrics.I.e.：Under identical one-dimensional electric filer content,
The conductive percolation threshold of the present invention is lower.
The present invention also provides a kind of conduction-toughening preparation methods of melt-blown compound nonwoven cloth, including：
Using polymer chips I, one-dimensional electric Nano filling as raw material, under the conditions of existing for dispersant, mechanical pelleting obtains
Conductive agglomerate；
With conductive agglomerate and polymer chips II be raw material using meltblown produce non-woven fabrics to get.
Preferably, the mechanical pelleting the specific steps are：By polymer chips I, one-dimensional electric Nano filling, dispersant
After mixed at high speed, screw extrusion molding, be granulated to get.
Preferably, the polymer chips I, one-dimensional electric Nano filling, dispersant mass ratio be 75~94：5~15：
1~10.
Preferably, the polymer chips I, II be polyester, makrolon, polybutylene terephthalate (PBT), polyamide,
In polyesteramide, polystyrene, polytetrafluoroethylene (PTFE), poly(aryl ether ketone), polyether-ether-ketone, polysulfones or polyphenylene sulfide thermoplastic polymer
It is a kind of.
In research, in order to match with air velocity when subsequent high-temperature high-speed airflow drawing-off, currently preferred one
Dimension electrical-conductive nanometer filler use a diameter of 20~50nm, draw ratio for 500~1100 metal nanometer line or it is a diameter of 0.6~
One kind in 10nm, the carbon nanotube that draw ratio is 1000~2000 or nickel-plating carbon nanotube.
Research shows that：Conductive filler draw ratio is bigger to require drawing-off wind speed bigger, and fibre diameter is also smaller.If draw ratio
Less than 500, it is unfavorable for the formation of conductive network；If draw ratio is more than 2000, one-dimensional electric Nano filling can be caused long,
Reach fibre diameter rank, is unfavorable for being smoothed out for follow-up drafting process.
Preferably, the dispersant is one kind or more in polyacrylic acid sodium salt, polyvinyl alcohol, polyethylene glycol or paraffin
Kind.
Preferably, the mass ratio of the conductive agglomerate and polymer chips II is 1:1~10.
The present invention also provides a kind of preferably conduction-toughening preparation methods of melt-blown compound nonwoven cloth, including：
First, it is the preparation of the one-dimensional electric Nano filling containing high concentration and finely dispersed conductive agglomerate, raw material packet
Include three kinds of components：Polymer chips, one-dimensional electric Nano filling, dispersant, quality proportioning are：Polymer chips 75~94
Part, 5~15 parts of one-dimensional electric Nano filling, 1~10 part of dispersant.Double spiral shells are passed through after three kinds of group lease making high-speed mixers are mixed again
Bar extruder squeezes out, be cooled and shaped be made be uniformly dispersed, the conductive agglomerate of one-dimensional electric Nano filling containing high concentration.
The polymer chips selects polyester, makrolon, polybutylene terephthalate (PBT), polyamide, polyamide
One kind in ester, polystyrene, polytetrafluoroethylene (PTFE), poly(aryl ether ketone), polyether-ether-ketone, polysulfones or polyphenylene sulfide thermoplastic polymer.
The melt index (MFI) of the polymer chips is generally 400~1500g/10min.
The one-dimensional electric Nano filling use a diameter of 20~50nm, draw ratio for 500~1100 metal nano
One kind in line or a diameter of 0.6~10nm, the carbon nanotube that draw ratio is 1000~2000 or nickel-plating carbon nanotube.
The dispersant is one or more in polyacrylic acid sodium salt, polyvinyl alcohol, polyethylene glycol or paraffin.
The present invention provides the preparation of a kind of one-dimensional electric Nano filling containing high concentration and finely dispersed conductive agglomerate
Method, this method carry out in accordance with the following steps：
(1) processing is dried to polymer chips and one-dimensional electric Nano filling in advance, it then will according to mass ratio
Polymer chips, one-dimensional electric Nano filling and dispersant are added in high-speed mixer together, mixing temperature control 90~
150 DEG C, it is made to be sufficiently mixed uniformly.
(2) above-mentioned mixture is fed from the hopper of screw extruder, screw speed is controlled in 30~100r/min, spiral shell
The extruding end melt temperature of bar extruder controls 20~80 DEG C on melting point polymer, extruded, cooling, molding, chopping system
Obtain the composition polymer master batch of the one-dimensional electric Nano filling containing high concentration.
Secondly, it is the preparation of conduction-toughening melt-blown compound nonwoven cloth, technological process is as shown in Fig. 2, specific prepare step
It is rapid as follows：
(1) by obtained above, the composition polymer master batch of the one-dimensional electric Nano filling containing high concentration is cut with the polymer
Piece is dry and mixes, mass ratio 1:1~10.
(2) and then the mixed material of composition polymer master batch and the polymer chips from the hopper of screw extruder it feeds
Enter, screw speed control is controlled in 10~60r/min, the extruding end melt temperature of screw extruder 40 on melting point polymer
~110 DEG C.
(3) melt sprays after filter, metering pump are transported to meltblown beam from spinneret orifice, in the air of high temperature and high speed
And melt stream is made to be formed superfine fibre by extreme drawing-off under the action of cooling air.General conductive filler draw ratio is got over
Require drawing-off wind speed bigger greatly, fibre diameter is also smaller, therefore the temperature of high temperature and high speed air 5 generally on melt temperature~
10 DEG C, speed is traditionally arranged to be 15000~20000m/min.To realize the high-orientation of one-dimensional electric Nano filling, for straight
The metal nanometer line that diameter is 20~100nm, draw ratio is 500~1100, drawing-off wind speed are set as 15000~17000m/min；
A diameter of 0.6~10nm, the carbon nanotube that draw ratio is 1000~2000 or nickel-plating carbon nanotube, drawing-off wind speed are set as
17000~20000m/min.Wherein, high temperature and high speed air draft and one-dimensional electric Nano filling orientation process and fiber cross section
As shown in figure 3, mixing polymer melts are sprayed from melt canal (5-1), it is empty by the high temperature blown out from hot-air channel (5-2)
The high speed drawing-off of gas acts on so that polymer melt is stretched by extreme and forms ultra-fine melt stream, and ultra-fine melt stream is again
It is cooled cooling down and being shaped to superfine fibre for air (5-3).The one-dimensional electric Nano filling (5-4) of fibrous inside is with big point
Subchain is orientated in an axial direction, is finally substantially axially arranged on fibrous inside and surface, the interlaced formation conductive mesh in part
Network node.
(4) superfine fibre obtained above gathers networking roller or at web is formed on lace curtaining, and wherein spinneret arrives
Networking roller is known as receiving distance at the distance of lace curtaining, and general control is in 20~60cm.Wherein at the conveying speed root of lace curtaining
According to final required non-woven fabrics grammes per square metre control, ensure the grammes per square metre of last non-woven fabrics in 5~50g/m2Between.
It (5) finally will be at melt spraying non-woven fabrics cutting, winding and the packing obtained on lace curtaining.
The mass fraction of one-dimensional electric Nano filling in the conduction-toughening melt-blown compound nonwoven cloth is 0.05~
6%, average fibre diameter is 1~10 μm, and the conductivity in nonwoven thickness direction is 1.8 × 10-4~1.0 × 10-1S/cm。
The present invention also provides non-woven fabrics prepared by any above method.
The present invention also provides above-mentioned non-woven fabrics to manufacture in aerospace equipment, and conductive, electromagnetic shielding, antistatic neck
Application in domain.
Beneficial effects of the present invention
(1) polymer masterbatch for preparing the one-dimensional electric Nano filling containing higher concentration in the present invention first, convenient for follow-up
Proportioning and its again with the mixing of polymer chips.
(2) synergistic effect of the shearing in the present invention using high-speed mixer in mixed at high speed, collision and dispersant, then
One-dimensional electric Nano filling may be implemented through double screw extruder extrusion at high temperature in the polymer preferably to disperse.
(3) in the present invention in meltblown nonwovens preparation process one-dimensional lead is realized using the drawing-off of high velocity, hot air effect
Electric Nano filling, along fiber axial orientation, this is significantly reduced while ensureing conductive network structure in fibrous inside and surface
The conductive percolation threshold of kind composite material.
(4) the drafting multiple higher in the present invention by the fiber of meltblown production compared with traditional textile chemical fibre, it is obtained
Fibre diameter is thinner, and generally at 1~10 μm, and melt spraying non-woven fabrics porosity is high, consequently facilitating liquid thermosetting resin is abundant
Infiltration forms fine two-arch tunnel structure after CFRP curing moldings, and then improves the interlaminar fracture toughness of CFRP, anti-impact
Hit performance and the conductivity of thickness direction.
(5) conduction-toughening of the invention has both high conductivity and toughening effect with melt-blown compound nonwoven cloth, can be effectively real
Existing CFRP conductions-integrated design object of toughening modifying.And this one-step method at cloth technological process is short, production efficiency
High, production cost is low and non-environmental-pollution.
(6) preparation method of the present invention is simple, highly practical, easy to spread.
Description of the drawings
The production technology route map of Fig. 1 conductions-toughening melt-blown compound nonwoven cloth.
Fig. 2 conductions-toughening melt-blown compound nonwoven cloth production technological process；
Wherein, 1-hopper, 2-screw extruders, 3-fondant filters, 4-metering pumps, 5-meltblown beams, 6-at
Lace curtaining, 7-webs, 8-suction units, 9-winding devices.
Fig. 3 hot-airs drawing-offs and one-dimensional electric Nano filling orientation process schematic diagram；
Wherein, 5-1-polymer melt channel, 5-2-hot-air channel, 5-3-cooling air channel, 5-4-are one-dimensional
Electrical-conductive nanometer filler.
Specific implementation mode
Feature of present invention and other correlated characteristics are described in further detail by the following examples, in order to the same industry
The understanding of technical staff.
Embodiment 1：
Select 85 parts of polyphenylene sulfide slice, MFI 460g/10min, a diameter of 40nm, the silver nanoparticle that draw ratio is 800
10 parts of line, 5 parts of polyacrylic acid sodium salt are squeezed out through double screw extruder after mixing three kinds of group lease making high-speed mixers, are cooled to
The composite polyphenylene sulfide master batch of the nano silver wire containing high concentration is made in type.
The specific preparation process of the composite polyphenylene sulfide master batch of this nano silver wire containing high concentration is as follows：
(1) poly-p-phenylene sulfide ether slice nano silver wire and processing is dried in advance, then according to mass ratio by polyphenylene sulfide
Ether slice, nano silver wire and polyacrylic acid sodium salt are added in high-speed mixer together, and mixing temperature is controlled at 120 DEG C, makes it
It is sufficiently mixed uniformly.
(2) above-mentioned mixture is fed from the hopper of screw extruder, screw speed control is squeezed in 60r/min, screw rod
The extruding end melt temperature control for going out machine is 320 DEG C, and the nano silver wire containing high concentration is made in extruded, cooling, molding, chopping
Composite polyphenylene sulfide master batch.
Secondly, it is the preparation of conduction-toughening nano silver wire/polyphenylene sulfide meltblown compound nonwoven cloth, preparation process is such as
Under：
(3) the composite polyphenylene sulfide master batch of the nano silver wire obtained above containing high concentration is pressed with polyphenylene sulfide slice
It is 1 according to mass ratio:1 dries and mixes.
(4) and then composite polyphenylene sulfide master batch and the mixed material of polyphenylene sulfide slice it is fed from the hopper of screw extruder
Enter, in 50r/min, the extruding end melt temperature control of screw extruder is 330 DEG C for screw speed control.
(5) melt sprays after filter, metering pump are transported to meltblown beam from spinneret orifice, in the air of high temperature and high speed
And melt stream is made to be formed superfine fibre by extreme drawing-off under the action of cooling air.The wherein temperature of high temperature and high speed air
Degree is 290 DEG C, and speed 16000m/min, wherein cooling air are air at room temperature.
(6) superfine fibre obtained above gathers networking roller or at web is formed on lace curtaining, and wherein spinneret arrives
Networking roller is known as receiving distance at the distance of lace curtaining, controls in 50cm.Wherein at the conveying speed of lace curtaining according to final institute
The non-woven fabrics grammes per square metre control needed ensures that the grammes per square metre of last non-woven fabrics is 15g/m2。
(7) quality of nano silver wire of the conduction-toughening made from nano silver wire/polyphenylene sulfide meltblown compound nonwoven cloth
For score 5%, average fibre diameter is 7 μm, and the conductivity in nonwoven thickness direction is 8.2 × 10-2S/cm。
Embodiment 2：
Select 85 parts of polyamide 6 section, MFI 1100g/10min, a diameter of 7nm, draw ratio 1600:1 carbon is received
12 parts of mitron, 3 parts of polyvinyl alcohol squeeze out after mixing three kinds of group lease making high-speed mixers through double screw extruder, are cooled and shaped
6 master batch of composite polyamide of the carbon nanotube containing high concentration is made.
The specific preparation process of 6 master batch of composite polyamide of this carbon nanotube containing high concentration is as follows：
(1) processing is dried to polyamide 6 section and carbon nanotube in advance, then according to mass ratio by polyamide 6
Slice, carbon nanotube and polyvinyl alcohol are added in high-speed mixer together, and mixing temperature is controlled at 100 DEG C, keep it fully mixed
It closes uniform.
(2) above-mentioned mixture is fed from the hopper of screw extruder, screw speed control is squeezed in 65r/min, screw rod
The extruding end melt temperature control for going out machine is 280 DEG C, and the carbon nanotube containing high concentration is made in extruded, cooling, molding, chopping
6 master batch of composite polyamide.
Secondly, it is the preparation of conduction-melt-blown compound nonwoven cloth of toughening carbon nano tube/polyamide 6 amine 6, preparation process is such as
Under：
(3) by 6 master batch of composite polyamide of the carbon nanotube obtained above containing high concentration and polyamide 6 section according to
Mass ratio is 1:1 dries and mixes.
(4) and then the mixed material of 6 master batch of composite polyamide and polyamide slice it is fed from the hopper of screw extruder,
In 45r/min, the extruding end melt temperature control of screw extruder is 290 DEG C for screw speed control.
(5) melt sprays after filter, metering pump are transported to meltblown beam from spinneret orifice, in the air of high temperature and high speed
And melt stream is made to be formed superfine fibre by extreme drawing-off under the action of cooling air.The wherein temperature of high temperature and high speed air
Degree is set as 230 DEG C, and speed 20000m/min, wherein cooling air are air at room temperature.
(6) superfine fibre obtained above gathers networking roller or at web is formed on lace curtaining, and wherein spinneret arrives
Networking roller is known as receiving distance at the distance of lace curtaining, controls in 40cm.Wherein at the conveying speed of lace curtaining according to final institute
The non-woven fabrics grammes per square metre control needed ensures that the grammes per square metre of last non-woven fabrics is 12g/m2。
(7) quality of carbon nanotube of the conduction made from-toughening in 6 compound nonwoven cloth of melt-blown carbon nano tube/polyamide 6 amine
For score 6%, average fibre diameter is 4 μm, and the conductivity in nonwoven thickness direction is 5.9 × 10-2S/cm。
Finally it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not limited to this hair
It is bright, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still
It can modify to the technical solution recorded in previous embodiment, or equivalent replacement is carried out to which part.It is all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not to the scope of the present invention
Limitation, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not required to
Make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (8)
1. a kind of conduction-toughening melt-blown compound nonwoven cloth, which is characterized in that the conductivity in the nonwoven thickness direction is
1.8×10-4~1.0 × 10-1S/cm, wherein the non-woven fabrics includes：One-dimensional electric Nano filling and polymer raw material, institute
It includes polymer chips I, polymer chips II to state polymer raw material, and the non-woven fabrics fiber average diameter is 1~10 μm；
The mass fraction of the one-dimensional electric Nano filling is 0.05~6%, in terms of non-woven fabrics gross mass；
The polymer chips I is polyester, makrolon, polybutylene terephthalate (PBT), polyamide, polyesteramide, polyphenyl
One kind in ethylene, polytetrafluoroethylene (PTFE), poly(aryl ether ketone), polyether-ether-ketone, polysulfones or polyphenylene sulfide thermoplastic polymer；
The polymer chips II is polyester, makrolon, polybutylene terephthalate (PBT), polyamide, polyesteramide, polyphenyl
One kind in ethylene, polytetrafluoroethylene (PTFE), poly(aryl ether ketone), polyether-ether-ketone, polysulfones or polyphenylene sulfide thermoplastic polymer；
The one-dimensional electric Nano filling uses metal nanometer line, the diameter of a diameter of 20~50nm, draw ratio for 500~1100
For 0.6~10nm, draw ratio be 1000~2000 carbon nanotube or a diameter of 0.6~10nm, draw ratio be 1000~2000
Nickel-plating carbon nanotube in one kind.
2. a kind of conduction-toughening preparation method of melt-blown compound nonwoven cloth, which is characterized in that including：
Using polymer chips I, one-dimensional electric Nano filling as raw material, under the conditions of existing for dispersant, mechanical pelleting obtains conductive
Master batch；
With conductive agglomerate and polymer chips II be raw material using meltblown produce non-woven fabrics to get；
The polymer chips I is polyester, makrolon, polybutylene terephthalate (PBT), polyamide, polyesteramide, polyphenyl
One kind in ethylene, polytetrafluoroethylene (PTFE), poly(aryl ether ketone), polyether-ether-ketone, polysulfones or polyphenylene sulfide thermoplastic polymer；
The polymer chips II is polyester, makrolon, polybutylene terephthalate (PBT), polyamide, polyesteramide, polyphenyl
One kind in ethylene, polytetrafluoroethylene (PTFE), poly(aryl ether ketone), polyether-ether-ketone, polysulfones or polyphenylene sulfide thermoplastic polymer；
The one-dimensional electric Nano filling uses metal nanometer line, the diameter of a diameter of 20~50nm, draw ratio for 500~1100
For 0.6~10nm, draw ratio be 1000~2000 carbon nanotube or a diameter of 0.6~10nm, draw ratio be 1000~2000
Nickel-plating carbon nanotube in one kind.
3. method as claimed in claim 2, which is characterized in that the mechanical pelleting the specific steps are：By polymer chips
I, after one-dimensional electric Nano filling, dispersant mixed at high speed, screw extrusion molding, be granulated to get.
4. method as claimed in claim 2, which is characterized in that the polymer chips I, one-dimensional electric Nano filling, dispersion
The mass ratio of agent is 75~94：5~15：1~10.
5. method as claimed in claim 2, which is characterized in that the dispersant is polyacrylic acid sodium salt, polyvinyl alcohol, poly- second
It is one or more in glycol or paraffin.
6. method as claimed in claim 2, which is characterized in that the mass ratio of the conductive agglomerate and polymer chips II is 1：
1~10.
7. non-woven fabrics prepared by any one of claim 2-6 the methods.
8. the non-woven fabrics of claim 1 or 7 is manufactured in aerospace equipment, and in conductive, electromagnetic shielding, antistatic field
Application.
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| WO2022099570A1 (en) * | 2020-11-13 | 2022-05-19 | 浙江大学 | Nanofiber and manufacturing method therefor |
| CN113215816A (en) * | 2021-04-29 | 2021-08-06 | 任国峰 | Graphene composite functional electromagnetic shielding film and preparation method thereof |
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