CN110066428A - A kind of modified NSF/NR composite material and preparation method and application - Google Patents
A kind of modified NSF/NR composite material and preparation method and application Download PDFInfo
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- CN110066428A CN110066428A CN201910439894.7A CN201910439894A CN110066428A CN 110066428 A CN110066428 A CN 110066428A CN 201910439894 A CN201910439894 A CN 201910439894A CN 110066428 A CN110066428 A CN 110066428A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
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Abstract
The present invention provides a kind of modified NSF/NR composite material and preparation method and application, the method includes carrying out being surface-treated the NSF system dispersed twice to NSF, the system and natural rubber be kneaded modified NSF/NR composite material is prepared；The first time surface treatment to NSF includes the operation for be modified again after solvent processing to NSF；Second of surface treatment to NSF includes using CH2=CH2Si(OH)3Solution is further processed the NSF after being surface-treated for the first time.This method is other than the mechanical properties such as wearability, stress at definite elongation, the tearing strength that can improve composite material, more particularly to improve dispersibility of the fiber on rubber matrix, it greatly reduces and generates cavity due to there is a situation where unsticking between fiber and rubber, improve the interfacial adhesion between fiber and natural rubber matrix, fiber/rubber composite material comprehensive performance is promoted, while solving the problems such as difficult processing, sizing material rheological property is poor.
Description
Technical field
The present invention relates to field of composite material preparation, and in particular to a kind of modified NSF/NR composite material and preparation method
And application.
Background technique
Disclosing the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without certainty
It is considered as recognizing or implying in any form that information composition has become existing skill well known to persons skilled in the art
Art.
Natural rubber occupies an important position in national economy and national defense construction as one of four big raw materials of industry.Naturally
Rubber is usually used in the manufacture of tyre industry, but there are some problems for discovery tire in practical applications, for example are easy tread flaking, resistance to
Cutting performance is bad, is easy to collapse and uses up block.The study found that suitable staple fiber is added in rubber matrix, have rubber product
There are the excellent performances such as high-modulus, high rigidity, cut resistant, tear-resistant, being folded without breaking, load resistance fatigue and creep resistant.
The composite material of fiber and rubber, when due to not forming chemical bond between rubber matrix and fiber, between interface
Active force be mainly that london dispersion force and polar forces or soda acid combine, interface cohesion is weaker, therefore, using coupling agent to fiber
It is to improve interfacial structure and then improve the most common method of interfacial combined function that surface, which is modified,.But inventors have found that conventional
The composite material that the fiber and rubber that method of modifying obtains are prepared may have the mechanical property of composite material preferable
Improve, but it is limited to the improvement of interfacial combined function, often or dispersibility of the fiber on rubber matrix can be generated
The adhesive effect of the bad, fiber of energy and rubber matrix is bad, causes when by stress, and hair is easy between fiber and rubber
Raw unsticking causes fiber integrally to be extracted interface or pulled out completely and generate hole, serious to restrict answering for cut-fiber reinforcement rubber
With.
Summary of the invention
Therefore, the purpose of the present invention is to provide a kind of modified NSF/NR composite material and preparation method, the present invention is provided
Modification NSF/NR composite material be a kind of heterogeneous system, wherein NSF is as dispersed phase, and NR is as continuous phase.Boundary layer is to determine
Surely an important factor for modified NSF/NR composite property, interface area plays transmitting stress, bears due to Thermal Contraction Coefficient difference
And the stress generated.Method of the invention is in addition to wearability, stress at definite elongation, the tearing strength etc. that can improve composite material
Outside mechanical property, more particularly to improve dispersibility of the fiber on rubber matrix, greatly reduce between fiber and rubber because occurring
Unsticking and be pulled out interface or pulled out the situation for generating cavity completely, the interface improved between fiber and natural rubber matrix is viscous
Knot promotes fiber/rubber composite material comprehensive performance, while solving the problems such as difficult processing, sizing material rheological property is poor.This hair
Bright method easily realizes industrialized feature since operation is simple and feasible, in mining and logging tyre, sebific duct, adhesive tape, sealing element, damping
The fields such as part have good development prospect.
Specifically, the present invention is realized by technical solution as described below:
The present invention provides a kind of preparation method of modification of nylon staple fiber/native rubber composite material, the method packets
Include and nylon short fibre (NSF) carried out to be surface-treated the NSF system dispersed twice, by the system and natural rubber (NR) into
Row is kneaded and modified NSF/NR composite material is prepared；
Wherein, the first time surface treatment to NSF includes the behaviour for be modified again after solvent processing to NSF
Make；Second of surface treatment to NSF includes using CH2=CH2Si(OH)3Solution is further processed through the first subsurface
Treated NSF.
In the present invention, the nylon short fibre (NSF) is nylon66 fiber staple fiber, also referred to as PA66 staple fiber, because
This, NSF system of the present invention is nylon66 fiber staple fiber system, modified NSF/NR composite material of the present invention namely
66 staple fibers of modification of nylon/native rubber composite material, or be 6 staple fibers of modified Pa 6/NR composite material.It is described herein fixed
Justice unless otherwise specified, the elaboration suitable for full text of the present invention.
In certain embodiments of the present invention, the first time surface treatment to NSF include: NSF is added to it is molten
It in agent, dries, is obtained through solvent treated NSF after ultrasonication；It will treated that NSF is added to modifying agent through solvent
In, heating water bath under alkaline condition, washing and drying after heating water bath obtains the NSF after being surface-treated for the first time.
Ultrasound can change morphosis, the degree of polymerization and the distribution of fiber, and the processing mode of this field routine is ultrasonic
Modifying agent (such as carboxyl end group class I liquid I rubber) is added simultaneously, using the cavitation generated in ultrasonic procedure, accelerate it is modified or
The speed of grafting reduces reaction condition, plays the role of similar catalysis.However unlike this, ultrasound procedure of the invention with change
Property the operation processing that is carried out separately, and is dried after ultrasound, such processing mode is in technology of the invention
In scheme can preferably realize technical effect of the invention.
In some embodiments of the present invention, solvent described in the first time surface treatment process includes but unlimited
In one of ethyl alcohol, ether, toluene, acetone, gasoline, hexamethylene or a variety of combinations.In more preferred embodiment,
The solvent is acetone.
In some embodiments of the present invention, ultrasonic time can choose 1-5h, under normal circumstances, with ultrasonic time
Extension, the influence to NSF is deeper, the development of subsequent step may be more conducive to, but find in research of the invention,
It after when ultrasonic time is 2 small, can preferably promote the progress of subsequent operation, realize more preferably technical effect.
In some embodiments of the present invention, modifying agent described in first time surface treatment process is selected from ethyl alcohol, second
One of acid, formaldehyde, phenol and cresols or a variety of combinations.
In certain embodiments of the present invention, inventor screens a variety of modifying agent, and discovery is compared to using
Conventional fiber surface modification agent, such as sodium hydroxide, maleic anhydride, acetic anhydride or dopamine are grasped in individual fibre modification
In work, what these modifying agent often played the role of fiber is physical etchings, although can carry out to fiber surface certain
Surface treatment, however essence of the invention is not identical, is especially unsuitable for further spreading out for subsequent operation of the present invention.And this hair
First step surface treatment in bright is then for the chemical modification to fiber, ethyl alcohol, acetic acid, formaldehyde, phenol and the first that the present invention selects
One of phenol or the more suitable technical solution of the present invention of a variety of combinations, in the premise for obtaining superior chemical modified effect
Under, it is particularly helpful to promote the progress of second of surface treatment of the present invention.In particular, In some embodiments of the present invention, making
Use formaldehyde more significant as modifying agent, modified effect and to the power-assisted of second of surface treatment.
In some embodiments of the present invention, the concentration of the modifying agent is 5%-20% (mass fraction)；When this is dense
Degree is easier preferably to realize modified effect when being 10%.Especially, when modifying agent is formaldehyde, 10% concentration is selected,
It can be relatively beneficial to modified operation.
In certain embodiments of the present invention, the condition of heating water bath described in first time surface treatment process are as follows:
60~90 DEG C of 2~4h of progress.In one more preferred embodiment, which is heating water bath 2h at a temperature of 80 DEG C.
In certain embodiments of the present invention, it is described include to second of NSF surface treatment will be through the first subsurface
Treated, and NSF is added to CH2=CH2Si(OH)3It is handled in solution, is washed out drying, the CH2=CH2Si(OH)3Solution
Mass concentration be 3%~30%, the processing time be 1-4h.
In certain embodiments of the present invention, the CH2=CH2Si(OH)3Solution is hydrolyzed by silane coupling agent
It arrives, the silane coupling agent is KH171.
Contain amido bond, terminal hydroxy group and amino, after being surface-treated for the first time, fiber in NSF (PA66 staple fiber)
The CH that the methylol on surface obtains after capable of hydrolyzing with KH1712=CH2Si(OH)3Hydrogen bond is formed, intermolecular force is enhanced.This
Outside, the CH obtained after KH171 hydrolysis2=CH2Si(OH)3Solution, can be with the hydroxyl on the NSF after being surface-treated for the first time
It has an effect, upper double bond and silicon is grafted on fiber, and with rubber constituent subchain can be easier to that total sulphur occurs in sulfidation
Change, make two kinds of materials " coupling " of different nature, improve the interfacial adhesion ability between two-phase, realizes comprehensive to composite material
The promotion of energy.
CH2=CH2Si(OH)3The concentration of solution can have an impact the present invention, can be compared with when its concentration is 3%-30%
Good realization said effect, however various concentration is to the having differences property of promotion of comprehensive performance in the range, specifically, at this
In some embodiments of invention, work as CH2=CH2Si(OH)3When the concentration of solution is 10%-20%, the promotion meeting to performance
Better than it is higher or lower on this basis when the case where, in particular, in some embodiments, working as CH2=CH2Si(OH)3Solution it is dense
It is especially pronounced to the promotion of composite material combination property when degree is 15%.
Silane coupling agent commonly used in the art is RSiX3, wherein R is nonhydrolyzable reactive organic functional base, such as
Epoxy group, vinyl, methacrylate etc.；X is hydrolyzable groups, such as halogen, alkoxy, acyloxy.This field is normal
Silane coupling agent such as KH550, KH560, KH570, NXT and other class coupling agent phosphoric acid.But with these couplings
The composite material that the nylon short fibre and natural rubber of agent processing are kneaded can promote composite material to a certain extent
Mechanical property, such as according to conventional methods in the art, and in the case where containing white carbon black, KH570 can be good at being promoted
Stress at definite elongation, relative to the composite material handled without KH570,100% stress at definite elongation improves 57%, to tearing strength
It is promoted limited, only improves 10.3%.But its to fiber rubber surface dispersibility almost without improvement, to fiber and natural
The improvement of the interfacial bond property of rubber is general, under normal circumstances, if to use traditional silane coupling agents such as KH570 etc.,
And fiber is promoted in the dispersibility and interface adhesion, reduction nylon short fibre/native rubber composite material table of rubber surface
The cavity in face will often be added compatilizer when using these silane coupling agents, be responsible for ineffective.In addition, these silane are even
The case where connection agent is primarily adapted for use in containing white carbon black.
However, the present invention selects to use KH171 as silane coupling agent, do not need to be obviously improved using compatilizer
While NSF/NR composite materials property, improve fiber in the dispersibility of rubber surface, while reducing composite material surface
Hole, promote the interfacial adhesion between fiber and rubber.In certain embodiments of the present invention, using KH171 as silicon
Alkane coupling agent reaches 4.496MPa to 100% stress at definite elongation, and the technical solution compared to unused KH171 improves 60.7%,
300% stress at definite elongation improves 35.6%, and tearing strength improves 56.8%.And it is used through the discovery of SEM test analysis
The trace for having apparent fiber to pull off on the NSF/NR composite material Tensile fracture that KH171 is obtained, surface hole defect are reduced, and DMA is surveyed
Examination limits the fortune of rubber molecular chain analysis shows KH171 enhances the adhesiveness of fiber and rubber interface to the processing of NSF
It is dynamic, to reduce fissipation factor peak value.
In certain embodiments of the present invention, the CH2=CH2Si(OH)3The preparation method of solution includes by silane idol
Connection agent KH171 is added to the water-alcohol solution prepared and is fully hydrolyzed.
In some embodiments of the present invention, the volume ratio of water and alcoholic solution is 1:1-2:8 in the water-alcohol solution.Institute
Alcohol such as dehydrated alcohol etc. is stated, the ratio of the water and alcohol such as can be 1:1,1:2,1:3 or 1:4.
In certain embodiments of the present invention, the mixing includes: that NR and the NSF system of dispersion are added in mixer
First time mixing is carried out, after mixing, obtained film will be kneaded for the first time and be cooled to room temperature；First time mixing is obtained
Film and stearic acid, zinc oxide, SPC, promotor are added in open mill, be kneaded for the second time after S is added, after mixing,
Film out is placed to eliminate internal stress；The film for taking second of mixing to obtain is vulcanized, and sample preparation is up to NSF/NR composite wood
Material.
In some embodiments of the present invention, the temperature that the first time is kneaded is 90-140 DEG C, revolving speed 70-85r/
Min, mixing time 6-10min.
In some embodiments of the present invention, it described second is kneaded and is carried out in double rod open mills, the mill time is
5-10min, roller speed ratio are 1:1.22, and the roller temperature of open mill is 35-45 DEG C.
And the present invention also provides a kind of 66 staple fibers of modification of nylon/native rubber composite materials, pass through institute as above
The method stated is prepared.
66 staple fibers of modification of nylon/native rubber composite material that method of the invention is prepared has excellent mechanics
The dispersibility of performance and fiber between rubber gets a promotion, and has the bonding force at interface between improved fiber and rubber, subtracts
The hole of composite material surface is lacked.
In certain embodiments of the present invention, 66 staple fibers of the modification of nylon/native rubber composite material being prepared
With excellent wear-resisting property and mechanical property, 100% stress at definite elongation improves 58~65%, and 300% stress at definite elongation improves
32~38%, tearing strength improves 52~58%；It is different degrees of through having on SEM test analysis composite material Tensile fracture
The trace that fiber pulls off, surface hole defect are reduced, and dispersibility of the modified nylon 66 fiber on natural rubber improves；DMA is surveyed
Examination analysis fiber and the adhesiveness of rubber interface enhance, and the movement of rubber molecular chain are limited, to reduce fissipation factor peak
Value.
And the present invention also provides above-mentioned 66 staple fibers of modification of nylon/native rubber composite materials in preparation mine wheel
Application in tire, sebific duct, adhesive tape, sealing element or shock absorber part.
The advantage and effect of this technology invention:
For tire easy tread flaking in actual use, cutting resistance is poor, is easy to collapse the problems such as using up block, present invention benefit
Have many advantages, such as high-modulus, high puncture and high-tear strength with nylon66 fiber staple fiber, adds it in rubber matrix, by rubber
The flexibility of glue and the rigidity of staple fiber organically combine, and to improve the above problem, prepare wear-resisting, excellent in mechanical performance answer
Condensation material.But inventors have found that the compatibility of fiber and rubber is bad, simple reaches fiber applications into rubber matrix
Less than required performance, simple and routine modification can only often promote mechanical property to a certain extent, it is virtually impossible to realize
Advantageous improvement to performance between fiber and rubber matrix interface, so being often had in the prior art in modified fiber
On the basis of screen suitable compatilizer again attempt improve interface between performance, the use of compatilizer can be to a certain extent
Improve interface performance, but disadvantage is also obvious, for example side reaction is larger, and the requirement to compounding conditions is relatively high etc..
The present invention is in view of will comprehensive performance (including wear-resisting, mechanical property and interface performance to Short Fiber/rubber Composites
Deng) promoted, while other function class auxiliary element (such as compatilizer etc.) is added without additional again, the present inventor is through wisdom
Property consider combine selectively experiment, using organo silane coupling agent KH171 its be fully hydrolyzed post-processing the short fibre of nylon66 fiber
Dimension, and necessary processing is carried out to nylon66 fiber staple fiber before this, composite wood is prepared be kneaded with natural rubber
Material, method of the invention have not only been obviously improved wear-resisting property, the mechanical property of composite material on the whole, have also significantly improved
Boundary layer problem after PA66 and natural rubber are compound enhances the compatibility of the two, so that preparation has the compound of excellent properties
Material is applied in tyre industry, can significantly improve tyre surface problem.
Contain amido bond, terminal hydroxy group and amino, after being surface-treated for the first time, fiber surface in PA66 staple fiber
The CH that methylol obtains after capable of hydrolyzing with KH1712=CH2Si(OH)3Hydrogen bond is formed, intermolecular force is enhanced.In addition,
The CH obtained after KH171 hydrolysis2=CH2Si(OH)3Solution can occur with the hydroxyl on the NSF after being surface-treated for the first time
Effect is grafted double bond and silicon on fiber, and can be easier to that co-vulcanization occurs in sulfidation with rubber constituent subchain, make two
Kind material " coupling " of different nature, improves the interfacial adhesion ability between two-phase, and realization mentions composite material combination property
It rises.
In addition, the preparation method of composite material of the present invention is easy to operate, it is readily produced, environmental pollution is small, in tire row
The fields such as industry, plastic industry, composite product have a good application prospect.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.Hereinafter, coming in conjunction with attached drawing detailed
Describe bright embodiment of the present invention in detail, in which:
Fig. 1 is the scanning electron microscope (SEM) photograph of the PA66 of different surface treatment in embodiment 1,2,4.1# is corresponding embodiment 1,2#
It is corresponding embodiment 2,3# is corresponding embodiment 4, and 4# is the enlarged drawing of 3#.
Fig. 2 is the SEM energy spectrum analysis of the nylon66 fiber staple fiber in embodiment 1 after processing.
Fig. 3 is the SEM energy spectrum analysis of the nylon66 fiber staple fiber after processing twice of the present invention in embodiment 4.
Fig. 4 is the scanning electron microscope (SEM) photograph of composite material Tensile fracture after different surface treatment in embodiment 1 and 4,1# in Fig. 4,
2# is embodiment 1, and 3#, 4# are embodiments 4.
Fig. 5 is the dynamic mechanical analysis of modification NSF/ native rubber composite material prepared by embodiment 1 and embodiment 4
Figure, wherein 1# represents the composite material test of embodiment 1 as a result, 4# represents the composite material test result of embodiment 4.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to conventional strip
Part or according to the normal condition proposed by manufacturer.
Unless otherwise defined, it anticipates known to all professional and scientific terms as used herein and one skilled in the art
Justice is identical.Unless otherwise specified, experimental material of the invention, reagent, tool are commonly used in the art, can pass through routine
Commercially available approach obtains, and usage mode can be used according to the conventional method of this field, or can also be used according to the description of product.This
Outside, any method similar to or equal to what is recorded and material can be applied to the method for the present invention.It is described in the text compared with
Good implementation method is for illustrative purposes only with material.
Unless otherwise specified, KH171 solution described in the embodiment of the present invention refers both to the solution after KH171 hydrolysis, or
It is also referred to as CH in the present invention2=CH2Si(OH)3Solution is filled by the way that KH171 to be added in the water-alcohol solution prepared
Hydrolysis is divided to obtain, the water-alcohol solution is ethanol water, and wherein the volume ratio of water and dehydrated alcohol is 1:1-2:8, wherein with
Volume ratio used in lower embodiment is 1:2.
Embodiment 1
(1) surface treatment of nylon66 fiber staple fiber:
1. taking the nylon66 fiber staple fiber of 20mm long, suitable acetone soln is added, with ultrasonic cleaning 2h, is placed in baking oven
It is dried for standby.
2. weighing the fiber that 8g acetone treatment is crossed, the formaldehyde of 10% concentration of 100ml is added in the environment of 0.5N NaOH
Solution, heating water bath 2h at a temperature of 80 DEG C, is washed with deionized 2 times later, is dried for standby.
Using scanning electron microscope analysis (SEM), section of the observation through the present embodiment treated nylon66 fiber short fibre sample, such as
In Fig. 1 shown in 1#.
With the energy spectrum analysis of scanning electron microscope analysis (SEM), the surface-element of processed nylon66 fiber staple fiber is analyzed, such as
Fig. 2.
(2) 6 staple fibers of modified Pa 6/native rubber composite material preparation:
1. by 100g NR and 8g treated NSF the is sequentially placed into rubber and plastic test mixer (Shanghai XSM-500 Kechuang rubber and plastic
Mechanical equipment Co., Ltd) in, be kneaded 7min in 140 DEG C and 80r/min revolving speed under conditions of, it is to be mixed uniformly after, will be kneaded
Film (i.e. masterbatch) afterwards is cooled to room temperature rear spare.
2. uniform masterbatch will be kneaded, stearic acid, zinc oxide, SPC (anti-aging agent), captax, DM, D, TT successively add
Enter and be kneaded 7min in two-roll mill (Φ 160*320, Dongguan City Chang Feng rubber and plastics machine Co., Ltd), is eventually adding S mixing
Internal stress is eliminated in 3min, slice (i.e. mixed sheet), placement for 24 hours.
3. suitable placement mixed sheet after cooling is cut, with no rotor vulcameter (MD-3000A, the detection of Taiwan high-speed rail
Instrument Ltd.) measurement film sulfurizing time, sample is laid in mould inner cavity, when further according to the optimum cure measured
Between, in vulcanizing press (XLB, 25t, Jiangdu jewel test machinery plant) vulcanization sample preparation to get.
The mechanical property of composite material obtained is tested using universal testing machine, test condition: test temperature (25 ±
2) DEG C, rate of extension 500mm/min.The form of NSF/NR vulcanizate tension failure is characterized by SEM.As a result such as the 1# in Fig. 4
With shown in 2#, wherein 2# is the enlarged drawing of 1#, the results showed that, fiber is improved with the adhesiveness on rubber matrix, fiber have by
The trace pulled off, the macroscopic surface being pulled out have the rubber grain of bonding, but still have the longer and more fiber being pulled out.It adopts
(DMA) is analyzed with dynamic mechanical, test condition: double cantilever beam strain mode, frequency 1Hz；Amplitude is 8 μm；Temperature is swept
Retouching range is -70~80 DEG C；Heating rate is 5 DEG C/min.As a result as shown in the #1 in Fig. 5.The result shows that fissipation factor peak value
It is higher.
Embodiment 2
(1) surface treatment of nylon66 fiber staple fiber:
1. taking the nylon66 fiber staple fiber of 20mm long, suitable acetone soln is added, with ultrasonic cleaning 2h, is placed in baking oven
It is dried for standby.
2. weighing the fiber that 8g acetone treatment is crossed, the formaldehyde of 10% concentration of 100ml is added in the environment of 0.5N NaOH
Solution, heating water bath 2h at a temperature of 80 DEG C, is washed with deionized 2 times later, is dried for standby.
3. it is that 5%KH171 solution handles 2h that concentration, which is added, into processed nylon66 fiber staple fiber early period, spend later
It ion water washing 3 times, is dried for standby, the NSF system handled.
With the energy spectrum analysis of scanning electron microscope analysis (SEM), to the surface-element of nylon66 fiber staple fiber after KH171 solution modification
Analysis, the method for the KH171 solution graft copolymerization modification of nylon 66 that this experiment is taken as the result is shown can significantly improve the short fibre of nylon66 fiber
Dimension table face is carbon containing, oxygen groups quantity and increases element silicon.Using scanning electron microscope analysis (SEM), sample section hair is observed
Now the surface of the nylon66 fiber staple fiber of the KH171 solution processing through 5% concentration begins with tiny graft product, as shown in figure 1
Shown in 2#.
(2) 6 staple fibers of modified Pa 6/native rubber composite material preparation:
1. by 100g NR and 8g treated NSF the is sequentially placed into rubber and plastic test mixer (Shanghai XSM-500 Kechuang rubber and plastic
Mechanical equipment Co., Ltd) in, be kneaded 7min in 140 DEG C and 80r/min revolving speed under conditions of, it is to be mixed uniformly after, will be kneaded
Film (i.e. masterbatch) afterwards is cooled to room temperature rear spare.
2. uniform masterbatch will be kneaded, stearic acid, zinc oxide, SPC (anti-aging agent), captax, DM, D, TT successively add
Enter and be kneaded 7min in two-roll mill (Φ 160*320, Dongguan City Chang Feng rubber and plastics machine Co., Ltd), is eventually adding S mixing
Internal stress is eliminated in 3min, slice (i.e. mixed sheet), placement for 24 hours.
3. suitable mixed sheet after cooling is cut, with no rotor vulcameter (MD-3000A, Taiwan High Speed Rail Testing Instruments
Co., Ltd) measurement film sulfurizing time, sample is laid in mould inner cavity, further according to the sulfurizing time measured,
In vulcanizing press (XLB, 25t, Jiangdu jewel test machinery plant) vulcanization sample preparation to get.
The mechanical property of composite material obtained is tested using universal testing machine, test condition: test temperature (25 ±
2) DEG C, rate of extension 500mm/min.It was found that 6 staple fibers of modified Pa 6/native rubber composite material stress at definite elongation and tearing are strong
Degree significantly improves, wherein discovery 6 staple fibers of modified Pa 6/native rubber composite material stress at definite elongation and tearing strength obviously mention
Height, 100% stress at definite elongation improve 57.6% compared to embodiment 1, and 300% stress at definite elongation improves 28.3%, tearing strength
Improve 50.6%.The trace for thering is apparent fiber to pull off on SEM test analysis composite material Tensile fracture, the fiber being pulled out
Quantity reduced relative to embodiment 1.The processing of DMA test analysis surface nylon66 fiber staple fiber grafting KH171 enhances
The adhesiveness of fiber and rubber interface, limits the movement of rubber molecular chain, and fissipation factor peak value reduces bright compared to embodiment 1
It is aobvious.
Embodiment 3
(1) surface treatment of nylon66 fiber staple fiber:
1. taking the nylon66 fiber staple fiber of 20mm long, suitable acetone soln is added, with ultrasonic cleaning 2h, is placed in baking oven
It is dried for standby.
2. weighing the fiber that 8g acetone treatment is crossed, the formaldehyde of 10% concentration of 100ml is added in the environment of 0.5N NaOH
Solution, heating water bath 2h at a temperature of 80 DEG C, is washed with deionized 2 times later, is dried for standby.
3. it is that 10%KH171 solution handles 2h that concentration, which is added, into processed nylon66 fiber staple fiber early period, spend later
It ion water washing 3 times, is dried for standby, the NSF system handled.
With the energy spectrum analysis of scanning electron microscope analysis (SEM), to the surface-element of nylon66 fiber staple fiber after KH171 solution modification
Analysis.The method for the KH171 solution graft copolymerization modification of nylon 66 that this experiment is taken as the result is shown, can significantly improve the short fibre of nylon66 fiber
Dimension table face is carbon containing, oxygen groups quantity and increases element silicon, and incrementss are higher than compared to embodiment 2.Using scanning electricity
Mirror analyzes (SEM), and the surface of the nylon66 fiber staple fiber of KH171 solution processing of the observation sample section discovery through 10% concentration is tiny
Graft product have increase compared to embodiment 2.
(2) 6 staple fibers of modified Pa 6/native rubber composite material preparation:
1. by 100g NR and 8g treated NSF the is sequentially placed into rubber and plastic test mixer (Shanghai XSM-500 Kechuang rubber and plastic
Mechanical equipment Co., Ltd) in, be kneaded 7min in 140 DEG C and 80r/min revolving speed under conditions of, it is to be mixed uniformly after, will be kneaded
Film (i.e. masterbatch) afterwards is cooled to room temperature rear spare.
2. uniform masterbatch will be kneaded, stearic acid, zinc oxide, SPC (anti-aging agent), captax, DM, D, TT successively add
Enter and be kneaded 7min in two-roll mill (Φ 160*320, Dongguan City Chang Feng rubber and plastics machine Co., Ltd), is eventually adding S mixing
Internal stress is eliminated in 3min, slice (i.e. mixed sheet), placement for 24 hours.
3. suitable mixed sheet after cooling is cut, with no rotor vulcameter (MD-3000A, Taiwan High Speed Rail Testing Instruments
Co., Ltd) measurement film sulfurizing time, sample is laid in mould inner cavity, further according to the sulfurizing time measured,
In vulcanizing press (XLB, 25t, Jiangdu jewel test machinery plant) vulcanization sample preparation to get.
The mechanical property of composite material obtained is tested using universal testing machine, test condition: test temperature (25 ±
2) DEG C, rate of extension 500mm/min.It was found that 6 staple fibers of modified Pa 6/native rubber composite material stress at definite elongation and tearing are strong
Degree significantly improves, wherein discovery 6 staple fibers of modified Pa 6/native rubber composite material stress at definite elongation and tearing strength obviously mention
Height, 100% stress at definite elongation improve 58.1% compared to embodiment 1, and 300% stress at definite elongation improves 31.5%, tearing strength
Improve 52.3%.The trace for thering is apparent fiber to pull off on SEM test analysis composite material Tensile fracture, the fiber being pulled out
Negligible amounts, the fiber being pulled out are whole shorter due to being pulled off.DMA test analysis surface nylon66 fiber staple fiber is grafted KH171
Processing enhance the adhesiveness of fiber and rubber interface, limit the movement of rubber molecular chain, fissipation factor peak value compared to
Embodiment 2 has reduction again.
Embodiment 4
(1) surface treatment of nylon66 fiber staple fiber:
1. taking the nylon66 fiber staple fiber of 20mm long, suitable acetone soln is added, with ultrasonic cleaning 2h, is placed in baking oven
It is dried for standby.
2. weighing the fiber that 8g acetone treatment is crossed, the formaldehyde of 10% concentration of 100ml is added in the environment of 0.5N NaOH
Solution, heating water bath 2h at a temperature of 80 DEG C, is washed with deionized 2 times later, is dried for standby.
3. it is that 15%KH171 solution handles 2h that concentration, which is added, into processed nylon66 fiber staple fiber early period, spend later
It ion water washing 3 times, is dried for standby, the NSF system handled.
With the energy spectrum analysis of scanning electron microscope analysis (SEM), to the surface-element of nylon66 fiber staple fiber after KH171 solution modification
Analysis, as shown in figure 3, the method for the KH171 solution graft copolymerization nylon66 fiber that this experiment is taken as the result is shown, can obviously significantly improve
Nylon66 fiber staple fiber surface is carbon containing, oxygen groups quantity and increases element silicon.Using scanning electron microscope analysis (SEM), observation
There are apparent graft product, phase in the surface of the nylon66 fiber staple fiber of KH171 solution processing of the sample section discovery through 15% concentration
It increased significantly compared with embodiment 3, shown in 3# and 4# as shown in figure 1, wherein 4# is the enlarged drawing of 3#.
(2) 6 staple fibers of modified Pa 6/native rubber composite material preparation:
1. by 100g NR and 8g treated NSF the is sequentially placed into rubber and plastic test mixer (Shanghai XSM-500 Kechuang rubber and plastic
Mechanical equipment Co., Ltd) in, be kneaded 7min in 140 DEG C and 80r/min revolving speed under conditions of, it is to be mixed uniformly after, will be kneaded
Film (i.e. masterbatch) afterwards is cooled to room temperature rear spare.
2. uniform masterbatch will be kneaded, stearic acid, zinc oxide, SPC (anti-aging agent), captax, DM, D, TT successively add
Enter and be kneaded 7min in two-roll mill (Φ 160*320, Dongguan City Chang Feng rubber and plastics machine Co., Ltd), is eventually adding S mixing
Internal stress is eliminated in 3min, slice (i.e. mixed sheet), placement for 24 hours.
3. suitable mixed sheet after cooling is cut, with no rotor vulcameter (MD-3000A, Taiwan High Speed Rail Testing Instruments
Co., Ltd) measurement film sulfurizing time, sample is laid in mould inner cavity, further according to the sulfurizing time measured,
Vulcanize sample preparation in vulcanizing press (XLB, 25t, Jiangdu jewel test machinery plant).
The mechanical property of composite material obtained is tested using universal testing machine, test condition: test temperature (25 ±
2) DEG C, rate of extension 500mm/min.It was found that 6 staple fibers of modified Pa 6/native rubber composite material stress at definite elongation and tearing are strong
Degree significantly improves, and 100% stress at definite elongation reaches 4.496MPa and improves 60.7%, and 300% stress at definite elongation improves 35.6%, tears
Resistance to spalling improves 56.8%.SEM Measurement results have bright as shown in the 3# and 4# in Fig. 4 on composite material Tensile fracture
The trace that aobvious fiber pulls off, the fiber number being pulled out is seldom, and is the fiber pulled off, the cavity presented in picture
Interior is mostly the residual fiber left pulled off, shows the preferable adhesiveness of fiber and rubber interface.DMA test analysis surface nylon
The processing of 66 staple fibers grafting KH171 enhances the adhesiveness of fiber and rubber interface, limits the movement of rubber molecular chain, pole
Big reduces fissipation factor peak value, and reduces degree and be higher than other embodiments, as a result as shown in 4# in Fig. 5.
Embodiment 5
(1) surface treatment of nylon66 fiber staple fiber:
1. taking the nylon66 fiber staple fiber of 20mm long, suitable acetone soln is added, with ultrasonic cleaning 2h, is placed in baking oven
It is dried for standby.
2. weighing the fiber that 8g acetone treatment is crossed, the formaldehyde of 10% concentration of 100ml is added in the environment of 0.5N NaOH
Solution, heating water bath 2h at a temperature of 80 DEG C, is washed with deionized 2 times later, is dried for standby.
3. it is that 20%KH171 solution handles 2h that concentration, which is added, into processed nylon66 fiber staple fiber early period, spend later
It ion water washing 3 times, is dried for standby, the NSF system handled.
With the energy spectrum analysis of scanning electron microscope analysis (SEM), to the surface-element of nylon66 fiber staple fiber after KH171 solution modification
Analysis, the method for the KH171 solution graft copolymerization modification of nylon 66 that this experiment is taken as the result is shown can significantly improve the short fibre of nylon66 fiber
Dimension table face is carbon containing, oxygen groups quantity and increases element silicon, does not increase compared to embodiment 4.Using scanning electricity
Mirror analyzes (SEM), and the surface of the nylon66 fiber staple fiber of KH171 solution processing of the observation sample section discovery through 20% concentration has carefully
Small graft product, but slightly reduced instead compared to embodiment 4.
(2) 6 staple fibers of modified Pa 6/native rubber composite material preparation:
1. by 100g NR and 8g treated NSF the is sequentially placed into rubber and plastic test mixer (Shanghai XSM-500 Kechuang rubber and plastic
Mechanical equipment Co., Ltd) in, be kneaded 7min in 140 DEG C and 80r/min revolving speed under conditions of, it is to be mixed uniformly after, will be kneaded
Film (i.e. masterbatch) afterwards is cooled to room temperature rear spare.
2. uniform masterbatch will be kneaded, stearic acid, zinc oxide, SPC (anti-aging agent), captax, DM, D, TT successively add
Enter and be kneaded 7min in two-roll mill (Φ 160*320, Dongguan City Chang Feng rubber and plastics machine Co., Ltd), is eventually adding S mixing
Internal stress is eliminated in 3min, slice (i.e. mixed sheet), placement for 24 hours.
3. suitable mixed sheet after cooling is cut, with no rotor vulcameter (MD-3000A, Taiwan High Speed Rail Testing Instruments
Co., Ltd) measurement film sulfurizing time, sample is laid in mould inner cavity, further according to the sulfurizing time measured,
Vulcanize sample preparation in vulcanizing press (XLB, 25t, Jiangdu jewel test machinery plant).
The mechanical property of composite material obtained is tested using universal testing machine, test condition: test temperature (25 ±
2) DEG C, rate of extension 500mm/min.It was found that 6 staple fibers of modified Pa 6/native rubber composite material stress at definite elongation and tearing are strong
Degree significantly improves, wherein discovery 6 staple fibers of modified Pa 6/native rubber composite material stress at definite elongation and tearing strength obviously mention
Height, 100% stress at definite elongation improve 59.4% compared to embodiment 1, and 300% stress at definite elongation improves 34.8%, tearing strength
Improve 54.9%.The trace for thering is apparent fiber to pull off on SEM test analysis composite material Tensile fracture, the fiber being pulled out
It is different in size, it is more compared to the fiber number that long fibre is pulled off.DMA test analysis surface nylon66 fiber staple fiber is grafted KH171
Processing enhance the adhesiveness of fiber and rubber interface, limit the movement of rubber molecular chain, fissipation factor peak value compared to
Embodiment 3 has reduction again.
Embodiment 6
(1) surface treatment of nylon66 fiber staple fiber:
1. taking the nylon66 fiber staple fiber of 20mm long, suitable acetone soln is added, with ultrasonic cleaning 2h, is placed in baking oven
It is dried for standby.
2. weighing the fiber that 8g acetone treatment is crossed, the formaldehyde of 10% concentration of 100ml is added in the environment of 0.5N NaOH
Solution, heating water bath 2h at a temperature of 80 DEG C, is washed with deionized 2 times later, is dried for standby.
3. it is that 15%KH570 solution handles 2h that concentration, which is added, into processed nylon66 fiber staple fiber early period, spend later
It ion water washing 3 times, is dried for standby, the NSF system handled.
(2) 6 staple fibers of modified Pa 6/native rubber composite material preparation:
1. by 100g NR and 8g treated NSF the is sequentially placed into rubber and plastic test mixer (Shanghai XSM-500 Kechuang rubber and plastic
Mechanical equipment Co., Ltd) in, be kneaded 7min in 140 DEG C and 80r/min revolving speed under conditions of, it is to be mixed uniformly after, will be kneaded
Film afterwards is cooled to room temperature rear spare.
2. uniform masterbatch will be kneaded, stearic acid, zinc oxide, SPC, captax, DM, D, TT sequentially add double roller and open
It is kneaded 7min in mill (Φ 160*320, Dongguan City Chang Feng rubber and plastics machine Co., Ltd), is eventually adding S and is kneaded 3min, slice,
Internal stress is eliminated in placement for 24 hours.
3. suitable mixed sheet after cooling is cut, with no rotor vulcameter (MD-3000A, Taiwan High Speed Rail Testing Instruments
Co., Ltd) measurement film sulfurizing time, sample is laid in mould inner cavity, further according to the sulfurizing time measured,
Vulcanize sample preparation in vulcanizing press (XLB, 25t, Jiangdu jewel test machinery plant).
The mechanical property of composite material obtained is tested using universal testing machine, test condition: test temperature (25 ±
2) DEG C, rate of extension 500mm/min.It was found that 6 staple fibers of modified Pa 6/native rubber composite material stress at definite elongation and tearing are strong
Degree significantly improves, and 100% stress at definite elongation improves 58.6% compared to embodiment 1, and 300% stress at definite elongation improves 34.8%,
Tearing strength improves 15.2%.Hole is more on SEM test analysis composite material Tensile fracture, and fiber is on rubber matrix
Poor dispersion, no apparent fiber pull off phenomenon.The processing pair of DMA test analysis surface nylon66 fiber staple fiber grafting KH570
Fiber and the adhesiveness of rubber interface are not improved, and fissipation factor peak value is in a slight decrease compared with Example 1.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of modified NSF/NR composite material, which is characterized in that the method includes carrying out table twice to NSF
The system and NR are carried out mixing and modified NSF/NR composite material are prepared by the NSF system that surface treatment is dispersed；
Wherein, the first time surface treatment to NSF includes the operation for be modified again after solvent processing to NSF；
Second of surface treatment to NSF includes using CH2=CH2Si(OH)3Solution is further processed through the first subsurface
Treated NSF.
2. the method according to claim 1, wherein the NSF is nylon66 fiber staple fiber；
Preferably, the first time to NSF is surface-treated the following steps are included: NSF is added in solvent, ultrasonication
After dry, obtain through solvent treated NSF；Will through solvent, treated that NSF is added in modifying agent, water-bath under alkaline condition
It heats, washing and drying after heating water bath obtains the NSF after being surface-treated for the first time.
3. according to the method described in claim 2, it is characterized in that, the solvent include but is not limited to ethyl alcohol, ether, toluene,
One of acetone, gasoline, hexamethylene or a variety of combinations；
Preferably, the modifying agent is selected from one of ethyl alcohol, acetic acid, formaldehyde, phenol and cresols or a variety of combinations；
Preferably, the concentration of the modifying agent is 5%-20% (mass fraction)；
Preferably, the condition of the heating water bath are as follows: 60~90 DEG C of 2~4h of progress.
4. the method according to claim 1, wherein it is described include to second of NSF surface treatment will be through the
Treated that NSF is added to CH for one-time surface2=CH2Si(OH)3It is handled in solution, is washed out drying, the CH2=CH2Si
(OH)3The mass concentration of solution is 3%~30%, and the processing time is 1-4h.
5. method according to claim 1 or 4, which is characterized in that the CH2=CH2Si(OH)3Solution passes through silane idol
Connection agent hydrolyzes to obtain, and the silane coupling agent is KH171.
6. according to the method described in claim 5, it is characterized in that, the CH2=CH2Si(OH)3The preparation method of solution includes
Silane coupling agent KH171 is added to the water-alcohol solution prepared to be fully hydrolyzed；
Preferably, the volume ratio of water and alcoholic solution is 1:1-2:8 in the water-alcohol solution.
7. the method according to claim 1, wherein the mixing includes: that NR and the NSF system of dispersion are added
First time mixing is carried out in mixer, after mixing, will be kneaded obtained film for the first time and is cooled to room temperature；First time is mixed
It refines obtained film and stearic acid, zinc oxide, SPC, promotor is added in open mill, carry out second after addition S and be kneaded, be kneaded
After, film, is placed to eliminate internal stress out；The film for taking second of mixing to obtain is vulcanized, and sample preparation is up to NSF/NR
Composite material.
8. the method according to the description of claim 7 is characterized in that the first time be kneaded temperature be 90-140 DEG C, revolving speed
For 70-85r/min, mixing time 6-10min；
Preferably, second of mixing carries out in double rod open mills, and the mill time is 5-10min, and roller speed ratio is 1:
1.22, the roller temperature of open mill is 35-45 DEG C.
9. modified NSF/NR composite material, is prepared by preparation method described in any one of claims 1 to 9.
10. modified NSF/NR composite material as claimed in claim 9 is preparing mining and logging tyre, sebific duct, adhesive tape, sealing element or damping
Application in part.
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| CN107522910A (en) * | 2017-09-25 | 2017-12-29 | 芜湖凯奥尔环保科技有限公司 | A kind of preparation method of nylon fiber surface-modified rubber composite |
| CN109183405A (en) * | 2018-08-24 | 2019-01-11 | 贵州大学 | A kind of processing method on nylon 66 fiber surface |
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| CN103243561A (en) * | 2013-05-29 | 2013-08-14 | 贵州大学 | Surface modification method of aramid, and reinforced natural rubber material and preparation method thereof |
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