CN109252287A - A kind of acetate fiber composite material and preparation method - Google Patents
A kind of acetate fiber composite material and preparation method Download PDFInfo
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- CN109252287A CN109252287A CN201810927569.0A CN201810927569A CN109252287A CN 109252287 A CN109252287 A CN 109252287A CN 201810927569 A CN201810927569 A CN 201810927569A CN 109252287 A CN109252287 A CN 109252287A
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- acetate fiber
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- acetate
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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
- D04H1/4374—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 using different kinds of webs, e.g. by layering webs
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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
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
-
- 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
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
- D01D5/0084—Coating by electro-spinning, i.e. the electro-spun fibres are not removed from the collecting device but remain integral with it, e.g. coating of prostheses
-
- 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
- D04H1/425—Cellulose series
- D04H1/4258—Regenerated cellulose series
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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
- D04H1/58—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/587—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
-
- 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
- D04H1/58—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
-
- 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
- D04H1/72—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 the fibres being randomly arranged
- D04H1/728—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 the fibres being randomly arranged by electro-spinning
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The present invention provides a kind of acetate fiber composite material and preparation methods.Composite material includes nanometer acetate fiber layer and acetate fiber nonwoven layer, and the layer of nanometer acetate fiber layer is interior bonding in the form of bonding point, also bonding in the form of bonding point between nanometer acetate fiber layer and acetate fiber nonwoven layer.Preparation method includes: that spinning solution is first made of cellulose acetate, solvent and binder, then electrostatic spinning, finally removes solvent and solidifies, obtains acetate fiber composite material.Composite material of the invention makes nanometer acetate fiber layer and acetate fiber nonwoven layer form a stress entirety by the way of point bonding, thus it is not easy to fall off, and be not easy to block the gap between nanometer acetate fiber, there is good nano effect.
Description
Technical field
The invention belongs to acetate fiber complex technique field, in particular to a kind of acetate fiber composite material and its preparation side
Method.
Background technique
Nanometer acetate fiber has the characteristics that small diameter, specific surface area and surface can be big, in filtering, sensing, medicine, biology
Etc. various fields be applied.However, its strength is poor, above it is restricted in application, therefore usually compound with non-woven base fabric, system
At the preferable material of strength, to solve the problems, such as that nanometer acetate fiber intensity is poor.
Conventional complex method receives the nanofiber of method of electrostatic spinning preparation using non-woven base fabric, and nanofiber is made to exist
It is deposited on non-woven base fabric, obtains the fibrous material of nanofiber Yu non-woven cloth stratiform structure.However, only making nanofiber heavy
Product will cause that layers of nanofibers is not close in conjunction with non-woven base fabric layer, and layers of nanofibers is easy non-on non-woven base fabric surface
It deforms or moves on woven base fabric layer, to be easy to fall off from its surface, this will cause the unstable of structure.
In order to overcome the problems, such as above, it need to further enhance the binding ability of the two using consolidation technique.However, due to
The relative movability of layers of nanofibers and non-woven base fabric layer, if the former two in consolidation technique relatively moves, then
It necessarily will affect the quality of consolidation effect and final products.In addition, common concretion technology includes needle thorn, spun lacing, heat bonding, change
Bonding etc. is learned, it is excessive to be formed by single bounding point area, for opposite nanofiber, easily causes nanometer fiber net Hole
Blocking, this can reduce its nano effect significantly.Furthermore rear consolidation technique often destroys the nano junction of layers of nanofibers
Structure.These factors can all influence product quality.
Summary of the invention
The first purpose of this invention is to provide a kind of acetate fiber composite material.
Second object of the present invention is to provide a kind of preparation method of above-mentioned acetate fiber composite material.
To achieve the above object, the invention adopts the following technical scheme:
A kind of acetate fiber composite material comprising: nanometer acetate fiber layer and acetate fiber nonwoven layer, nanometer vinegar
It is bonding in the form of bonding point by first binder between nanometer acetate fiber in sour fibrous layer, nanometer acetate fiber layer
Surface and the surface (i.e. the contact surface of the two) of acetate fiber nonwoven layer are mutually glued in the form of bonding point by the second binder
Knot.
Wherein, first binder and the second binder are the non-volatile substance that can be dissolved each other with acetate fiber, the first bonding
Agent and the second binder also dissolve each other.First binder and the type of the second binder may be the same or different.If first is viscous
Knot agent is identical with the type of the second binder, then first binder and the second binder are triacetyl glycerine.
It is by first between the nanometer acetate fiber in nanometer acetate fiber layer in acetate fiber composite finished product
Class bonding point form is bonding, and therefore, the contact area of first kind bonding point and nanometer acetate fiber can account for whole nanometers
The 0.01% to 30% of the sum of the surface area of acetate fiber can also account for 0.05% to 25%, can also account for 0.1% to 20%,
0.5% to 15% can further be accounted for.
It is to pass through between nanometer acetate fiber layer and acetate fiber nonwoven layer in acetate fiber composite finished product
Second class bonding point form is bonding, therefore, the contact surface on the surface of the second class bonding point and acetate fiber nonwoven layer
Product can account for the 0.01% to 25% of the surface area of acetate fiber nonwoven layer, or and 0.05% to 20%, may be used also
Think 0.1% to 15%, can further be 0.15% to 10%.
The diameter of nanometer acetate fiber in nanometer acetate fiber layer can be 1-1000nm, or 5-800nm, also
It can be 10-500nm, may further be 100-300nm.Diameter herein refers to that nanometer acetate fiber is above-mentioned each model
Any one numerical value in enclosing, that is, the diameter of nanometer acetate fiber of the invention is uniform.Gram of nanometer acetate fiber layer
Weight can be 3.0-4.0g/m2。
The diameter of acetate fiber in acetate fiber non-woven cloth can be 1-100 μm, or 3-95 μm, can be with
It is 5-90 μm, may further is 10-80 μm, further can is 50-60 μm.The grammes per square metre of acetate fiber nonwoven layer can
Think 25-130g/m2, or 30-120g/m2, can also be 50-100g/m2, may further be 60-80g/m2。
In the present invention, between the internal fiber of acetic acid nanometer fiber net in the form of bonding point stick to each other；In Nanowire
Net and non-woven cloth interface are tieed up, is also in the form of bonding point between the nanofiber to contact with each other and non-woven cloth outer layer fiber
Stick to each other.
A kind of preparation method of acetate fiber composite material comprising following steps:
(1), spinning solution is at least made using cellulose acetate, solvent and non-volatile liquid binder；
(2), the cellulose acetate in spinning solution is made to form nanometer acetate fiber and in acetate fiber using method of electrostatic spinning
It is deposited on non-woven cloth, obtains stratified material；
(3), it removes the solvent in stratified material and solidifies the non-volatile liquid binder in stratified material, obtain acetic acid
Fibrous composite.
In step (1), cellulose acetate is cellulose diacetate, and weight average molecular weight can be 50,000-15 ten thousand.Solvent
It can be one or more of acetone, acetic acid, water or dimethyl acetamide.Non-volatile liquid binder is three triacetins
Ester.
In step (1), the mass ratio of cellulose acetate and non-volatile liquid binder can be (5-25): 1, it can also
Think (10-20): 1, can also be (15-18): 1.
In step (1), the mass ratio of solvent and non-volatile liquid binder can be (50-150): 1, or
(60-100): 1, can also be (70-85): 1.
In step (2), the spinning voltage of method of electrostatic spinning is 15-30kV, spinning speed 0.5-1.9m/min, is received
Distance is 17-30cm.
In step (3), it is removed and is solidified using heating.
By adopting the above scheme, the beneficial effects of the present invention are:
Firstly, non-volatile liquid binder of the invention enables to for " face bonding " compared with the existing technology
In nanometer acetate fiber layer between adjacent nanometer acetate fiber and nanometer acetate fiber layer and acetate fiber nonwoven layer
Between with " point bonding " of nanoscale, therefore, bonding mode of the invention can not only make nanometer acetate fiber layer and a vinegar
Sour fiber non-woven layer of cloth is combined into a whole force structure, to make not relatively move therebetween, it is not easy to produce
The problem of raw nanometer acetate fiber layer falls off from acetate fiber nonwoven layer, and be not easy to block nanometer acetate fiber layer
In gap between each nanometer acetate fiber, to obtain good nano effect.
Secondly, preparation method of the invention makes nanometer acetate fiber layer and acetate fiber nonwoven layer pass through Static Spinning
Silk method being capable of the integral force structure of direct combination, it is not necessary to using subsequent fixation or composite steps, to will not generate
The problem of nanostructure for being easily destroyed nanometer acetate fiber layer caused by later period is compound, and it is compound to save the later period
Process flow.
Figure of description
Fig. 1 is the electron microscope of acetate fiber composite material of the invention.
Fig. 2 is the bonding schematic diagram of acetate fiber composite material of the invention
Attached drawing mark
Nanometer acetate fiber 1, connecting bridge 2, connecting bridge 3, acetate fiber non-woven cloth 4.
Specific embodiment
The present invention provides a kind of acetate fiber composite material and preparation methods.
<acetate fiber composite material>
A kind of acetate fiber composite material comprising: acetate fiber nonwoven layer and it is formed in that the acetate fiber is non-to be knitted
Make the nanometer acetate fiber layer at least one surface of layer of cloth.For example, the structure of the acetate fiber composite material can be " vinegar
Sour fiber non-woven layer of cloth/nanometer acetate fiber layer ", or " nanometer acetate fiber layer/acetate fiber nonwoven layer/
Nanometer acetate fiber layer " sandwich structure, can also be multiple " nanometer acetate fiber layers/acetate fiber nonwoven layer/nanometer vinegar
The laminated construction that sour fibrous layer " is combined.
[nanometer acetate fiber layer]
The grammes per square metre of nanometer acetate fiber layer can be 3.0-4.0g/m2, it is made of nanometer acetate fiber.This nanometer of acetic acid
The diameter of fiber can be 1-1000nm, or 5-800nm can also be 10-500nm, may further be 100-
300nm。
Nanometer acetate fiber is that the spinning solution of specific composition is formed by method of electrostatic spinning, which includes acetate fiber
Element, solvent and non-volatile liquid binder.The mass ratio of cellulose acetate and non-volatile liquid binder is (5-25): 1,
May be (10-20): 1, can also be (15-18): 1.The mass ratio of solvent and non-volatile liquid binder is (50-
150): 1, or (60-100): 1, can also be (70-85): 1.Matter of the non-volatile liquid binder in spinning solution
Amount percentage is 0.5-2%.
Wherein, cellulose acetate is preferably cellulose diacetate, and weight average molecular weight can be 50,000-15 ten thousand, or
60000-12 ten thousand, it can also be 70,000-10 ten thousand, can further be 80,000-9 ten thousand.
Solvent is the substance that can dissolve cellulose diacetate or acetate fiber and non-volatile liquid binder, example
Such as, can in acetone, acetic acid, water or dimethyl acetamide any one or it is two or more.The additive amount of solvent should ensure that
The mobility of spinning solution is preferable, and can form fibre bundle by method of electrostatic spinning.
Non-volatile liquid binder can dissolve each other with cellulose acetate, for example, it can be triacetyl glycerine.Because
Containing non-volatile liquid binder and it is with non-volatile in spinning solution, thus this kind of binder in electrostatic spinning not
It can volatilize and liquid is presented.After the cellulose diacetate electrostatic spinning in spinning solution forms nanometer acetate fiber, this kind viscous
Knot agent is discontinuously distributed in the surface of nanometer acetate fiber.Pass through this binder phase between adjacent nanometer acetate fiber
Even.Subsequent solidification process is cured this kind of liquid-containing binder, to be formed between adjacent nanometer acetate fiber
" bridge ", plays a supporting role.Since the size of nanometer acetate fiber is nanoscale, the liquid-containing binder after solidifying is being received
Being formed by support construction between rice acetate fiber is also nanoscale, will not block the hole between nanometer acetate fiber, as a result,
The combination of both materials forms the space structure with nanoscale hole hole, can be used as a stress entirety, has fine
Nano effect.
As depicted in figs. 1 and 2, it is connected between two nanometer acetate fibers by connecting bridge 2.The connecting bridge 2 is by spinning solution
In non-volatile liquid binder it is cured after formed.When the cellulose diacetate in spinning solution forms nanometer acetate fiber 1
Afterwards, non-volatile liquid binder can discontinuously be covered on the surface of nanometer acetate fiber 1, and tension force effect makes part is non-to wave
Hair property liquid-containing binder forms " bridge " between adjacent nanometer acetate fiber 1.In subsequent solvent removal and solidification process
After the completion, " bridge " of liquid is cured, to be developed across the solid connecting bridge between two nanometer acetate fibers
2.Because non-volatile liquid binder is not the surface that nanometer acetate fiber is completely covered, but is connected by spells adjacent
Nanometer acetate fiber, so nanometer acetate fiber 1 and connecting bridge 2 will form the space structure with nanoscale hole hole.In Fig. 1
The cross section of nanometer acetate fiber be Y type, the cross section of the nanometer acetate fiber in Fig. 2 is circle.
The formation of " bridge " and gap structure needs to guarantee that non-volatile liquid binder is discontinuously covered on a nanometer vinegar
The surface of sour fiber 1, therefore, can by non-volatile liquid binder 1 surface of nanometer acetate fiber area coverage define
For contact area, and the non-volatile liquid binder and the contact area of nanometer acetate fiber is made to account for whole nanometer acetic acid
The 0.01% to 30% of the sum of the surface area of fiber, or 0.05% to 25%, it can also be 0.1% to 20%, it can also
Further for 0.5% to 15%.
Certainly, Fig. 1 and Fig. 2 are merely illustrative, and the cross section of nanometer acetate fiber may be other shapes.Spinneret
The shape in hole determines the shape of cross section, i.e., which type of spinneret orifice which type of cross section will be generated using.
[acetate fiber nonwoven layer]
The grammes per square metre of acetate fiber nonwoven layer can be 25-130g/m2, or 30-120g/m2, can also be
50-100g/m2, may further be 60-80g/m2.Acetate fiber nonwoven layer is logical by raw materials for production of cellulose acetate
It crosses made of Nonwovens In Technology.The diameter of acetate fiber in acetate fiber non-woven cloth is 1-100 μm, or 3-95
μm, it can also be 5-90 μm, may further be 10-80 μm, further can be 50-60 μm.
As shown in Figure 1, when nanometer acetate fiber 1 is formed in the surface of acetate fiber non-woven cloth 4 by method of electrostatic spinning
Afterwards, because the surface of nanometer acetate fiber 1 is discontinuously covered with non-volatile liquid binder, and the non-volatile liquid
Binder can be dissolved in acetate fiber, so at the contact surface of nanometer acetate fiber 1 and acetate fiber non-woven cloth 4, it is non-to wave
Hair property liquid-containing binder can be partly dissolved the acetate fiber on the surface of acetate fiber non-woven cloth 4, and tension force effect can also make nanometer
" bridge " is formed between acetate fiber 1 and the contact surface of acetate fiber non-woven cloth 4.In subsequent solvent removal and solidification process
After the completion, " bridge " of liquid is cured, to be developed across in nanometer acetate fiber 1 and acetate fiber non-woven cloth 4
Connecting bridge 3 between contact surface.Because non-volatile liquid binder is not the surface that nanometer acetate fiber is completely covered, but
Adjacent nanometer acetate fiber is connected by spells, so acetate fiber non-woven cloth 4 will not be completely covered in connecting bridge 3
Surface, but also formed in the interface of nanometer acetate fiber layer and acetate fiber nonwoven layer vertical with nanoscale hole hole
Body cross-linked structure.Meshed reticular structure can be presented in the cross section of the 3 D cross-linked structure.
The formation of " bridge " and gap structure needs to guarantee that non-volatile liquid binder is discontinuously covered on acetic acid fibre
The surface for tieing up non-woven cloth 4 therefore can be by non-volatile liquid binder covering on the surface of acetate fiber non-woven cloth 4
Capping product is defined as contact area, so that the contact of the non-volatile liquid binder and the surface of acetate fiber nonwoven layer
Area accounts for the 0.01% to 25% of the surface of acetate fiber nonwoven layer, or and 0.05% to 20%, can also be
0.1% to 15%, it can further be 0.15% to 10%.
It is of course also possible to realize acetate fiber non-woven cloth 4 external coating can simultaneously with cellulose acetate and non-wave
Other non-volatile binders that hair property liquid-containing binder dissolves each other, can also play equivalent effect in this way.
Therefore, non-volatile liquid binder of the invention enables to be formed between adjacent nanometer acetate fiber 1 solid
The connecting bridge 2 of state, and the contact surface of nanometer acetate fiber layer and acetate fiber nonwoven layer is made also to form solid company
Bridge 3 is connect, these connecting bridges can play a supporting role, can will be between nanometer acetate fiber and nanometer acetate fiber and acetic acid
It links together between fiber non-woven, plays the role of whole stress, and prevent nanometer acetate fiber layer relative to acetic acid
The displacement of fiber non-woven layer of cloth.On the other hand, non-volatile liquid binder of the invention is formed at a nanometer acetate fiber
Surface, being formed by connecting bridge is also nano-scale, to will not block the gap in nanometer acetate fiber layer, have
Good nano effect.
<preparation method of acetate fiber composite material>
A kind of preparation method of acetate fiber composite material comprising following steps:
(1), spinning solution is at least made using cellulose acetate, solvent and non-volatile liquid binder；
(2), spinning solution is made to form nanometer acetate silk and on acetate fiber non-woven cloth using method of electrostatic spinning
Deposition, obtains stratified material；
(3), it removes remaining solvent in stratified material and solidifies the non-volatile liquid binder in the stratified material,
Obtain acetate fiber composite material.
Wherein, in step (1), cellulose acetate is cellulose diacetate, and weight average molecular weight is 50,000-15 ten thousand.
Solvent is the volatile materials that can dissolve cellulose diacetate and non-volatile liquid binder, for example, can be with
For one or more of acetone, acetic acid, water or dimethyl acetamide.
Non-volatile liquid binder is the substance that can be dissolved each other with cellulose acetate, for example, triacetyl glycerine.
The mass ratio of cellulose acetate and non-volatile liquid binder is (5-25): 1, or (10-20): 1, also
Can be (15-18): 1.
The mass ratio of solvent and non-volatile liquid binder is (50-150): 1, or (60-100): 1, may be used also
Think (70-85): 1.
In step (2), the spinning voltage of method of electrostatic spinning is 15-30kV, spinning speed 0.5-1.9m/min, is received
Distance is 17-30cm.
In step (2), spinning solution will form a nanometer acetate silk, this nanometer of acetate fiber by method of electrostatic spinning
Tow includes nanometer acetate fiber and is not exclusively covered on the non-volatile liquid binder on this nanometer of acetate fiber surface.Its
In, the cellulose acetate in spinning solution forms nanometer acetate fiber, and the non-volatile liquid binder in spinning solution is then discontinuous
Ground is covered on the surface of nanometer acetate fiber.
In step (3), solvent and solidification are removed using heating.Solvent is volatile substances, in the item of heating
It is easy to volatilize under part.And non-volatile liquid binder is involatile substance, will not be volatilized under heating conditions concurrent
Raw solidification, forms solid matter.
<embodiment 1>
Present embodiments provide a kind of preparation method of acetate fiber composite material comprising following steps:
(1), cellulose diacetate, solvent (acetone) and non-volatile liquid binder (triacetyl glycerine) are mixed equal
It is even, spinning solution is made.
(2), so that spinning solution is formed nanometer acetate silk using method of electrostatic spinning, be to connect with acetate fiber non-woven cloth
Material is received, deposits nanometer acetate silk on acetate fiber non-woven cloth.
(3), step (2) products therefrom is placed in drying device (baking oven), it is 3 minutes dry at 100 DEG C, to vapor away
Solvent and solidify non-volatile liquid binder, finally obtains acetate fiber composite material.
Wherein, in step (2), in the forming process of nanometer acetate silk, non-volatile liquid binder meeting
Remain in the surface of nanometer acetate fiber.When the nanometer acetate silk newly formed is in deposition, with deposited nanometer vinegar
Sour fibre bundle or acetate fiber non-woven cloth are in contact, and the non-volatile liquid binder of surface covering can dissolve contact
Point forms bonding point, will form " bridge " between bonding point.
In step (3), the solvent of effumability volatilizees under the action of high temperature, and non-volatile liquid binder is formed
" bridge " be cured at high temperature, become the connecting bridge for playing support and connection function.
In short, the present invention is added appropriate triacetyl glycerine and is stirred evenly in cellulose acetate electrostatic spinning liquid, with
Acetate fiber non-woven cloth is to receive material, prepares acetic acid nanofiber by solution method of electrostatic spinning, nanofiber is forming
In the process, non-volatile solvents triacetyl glycerine remains in nanofiber surface, when nanofibres deposit, with non-woven base
Cloth or depositing nanofibers contact, and dissolve contact point by surface layer triacetyl glycerine, so that bonding point is formed, subsequently into
Drying device dries remaining solvent and triacetyl glycerine.The present invention in spinning solution by adding a certain proportion of non-wave
Hair property and dissolve acetate fiber triacetyl glycerine, by spinning realize acetic acid nanofiber inside and its with acetate fiber it is non-
Bonding point is formed between woven cloths surface fibre, solves that nanometer fiber net strength is poor, asking of being easy to fall off from non-woven cloth
Topic, and this method be it is online compound, process flow is greatly shortened, saves later period combination process.
This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art
It is bright；Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiments without having to go through creative labor；Therefore, the present invention is not limited to implementations here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (11)
1. a kind of acetate fiber composite material, it is characterised in that: include: nanometer acetate fiber layer and acetate fiber non-woven cloth
Layer, bonding in the form of bonding point by first binder between the nanometer acetate fiber in the nanometer acetate fiber layer, institute
The contact surface for stating nanometer acetate fiber layer and the acetate fiber nonwoven layer passes through the second binder phase in the form of bonding point
Bonding.
2. acetate fiber composite material according to claim 1, it is characterised in that: the first binder and described second
Binder is the non-volatile substance that can be dissolved each other with acetate fiber；And/or
The first binder and the type of second binder are identical or different.
3. acetate fiber composite material according to claim 2, it is characterised in that: the first binder and described second
Binder is triacetyl glycerine.
4. acetate fiber composite material according to claim 1, it is characterised in that: the first binder and the nanometer
The contact area of acetate fiber accounts for the 0.01% to 30% of the sum of surface area of whole nanometer acetate fibers；And/or
The first binder and the contact area of the nanometer acetate fiber account for the sum of the surface area of whole nanometer acetate fibers
0.05% to 25%.
5. acetate fiber composite material according to claim 1, it is characterised in that: second binder and the acetic acid
The contact area on the surface of fiber non-woven layer of cloth account for the 0.01% of the surface area of the acetate fiber nonwoven layer to
25%；And/or
The contact area on second binder and the surface of the acetate fiber nonwoven layer accounts for that the acetate fiber is non-to be knitted
Make the 0.05% to 20% of the surface area of layer of cloth.
6. acetate fiber composite material according to claim 1, it is characterised in that: receiving in the nanometer acetate fiber layer
The diameter of rice acetate fiber can be 1-1000nm, or 5-800nm can also be 10-500nm, may further be
100-300nm；And/or
The grammes per square metre of the nanometer acetate fiber layer is 3.0-4.0g/m2。
7. acetate fiber composite material according to claim 1, it is characterised in that: in the acetate fiber non-woven cloth
The diameter of acetate fiber can be 1-100 μm, or 3-95 μm, can also be 5-90 μm, may further be 10-80 μ
M further can be 50-60 μm；And/or
The grammes per square metre of the acetate fiber nonwoven layer is 25-130g/m2。
8. a kind of preparation method of acetate fiber composite material, characterized by the following steps:
(1), spinning solution is at least made using cellulose acetate, solvent and non-volatile liquid binder；
(2), the cellulose acetate in the spinning solution is made to form nanometer acetate fiber and in acetate fiber using method of electrostatic spinning
It is deposited on non-woven cloth, obtains stratified material；
(3), it removes the solvent in layered material and solidifies the non-volatile liquid binder in layered material, obtain
Acetate fiber composite material.
9. the preparation method of acetate fiber composite material according to claim 8, it is characterised in that: in step (1), institute
Stating cellulose acetate is cellulose diacetate, and weight average molecular weight is 50,000-15 ten thousand；And/or
The solvent is one or more of acetone, acetic acid, water or dimethyl acetamide；And/or
The non-volatile liquid binder is triacetyl glycerine；And/or
The mass ratio of the cellulose acetate and the non-volatile liquid binder can be (5-25): 1, or (10-
20): 1, can also be (15-18): 1；And/or
The mass ratio of the solvent and the non-volatile liquid binder can be (50-150): 1, or (60-
100): 1, can also be (70-85): 1.
10. the preparation method of acetate fiber composite material according to claim 8, it is characterised in that: in step (2),
The spinning voltage of the method for electrostatic spinning is 15-30kV, spinning speed 0.5-1.9m/min, and receiving distance is 17-30cm.
11. the preparation method of acetate fiber composite material according to claim 8, it is characterised in that: in step (3),
The removal and the solidification are carried out using heating.
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Cited By (1)
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| WO2021082090A1 (en) * | 2019-10-30 | 2021-05-06 | 博裕纤维科技（苏州）有限公司 | Anti-backflushing nanofiber composite filter material having anchor points |
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