CN112663346B - High-strength stress absorption film material and preparation method thereof - Google Patents

High-strength stress absorption film material and preparation method thereof Download PDF

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CN112663346B
CN112663346B CN202011585521.XA CN202011585521A CN112663346B CN 112663346 B CN112663346 B CN 112663346B CN 202011585521 A CN202011585521 A CN 202011585521A CN 112663346 B CN112663346 B CN 112663346B
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thermoplastic elastomer
film material
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CN112663346A (en
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顾世俊
徐青松
孙玉
吴金伟
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Nantong Traffic Construction Engineering Co ltd
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Nantong Traffic Construction Engineering Co ltd
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Abstract

The application relates to the field of building construction, and particularly discloses a high-strength stress absorption film material and a preparation method thereof, wherein the high-strength stress absorption film material comprises a base cloth layer and an absorption layer, and the absorption layer comprises the following substances in parts by weight: 6-8 parts of HDPE resin; 35-45 parts of matrix asphalt; 10-15 parts of modified fiber; the modified fiber comprises thermoplastic elastomer fiber with the diameter of 0.2-0.5 mm. This application has adopted the discarded rubber tire or the rubber granule material that adopt in the thermoplastic elastomer substitution tradition scheme, optimizes the stress absorption intensity to the stress absorption membrane, and this application has adopted fibrous structure to replace traditional rubber powder structure simultaneously to further improve the high strength stress that the stress absorption membrane material can bear in-service use and restoration, thereby effectively improved stress absorption membrane material mechanical properties.

Description

High-strength stress absorption film material and preparation method thereof
Technical Field
The application relates to the field of building construction, in particular to a high-strength stress absorption film material and a preparation method thereof.
Background
The pavement structure generally adopted in cold areas is a semi-rigid base asphalt concrete pavement structure, the semi-rigid base has good integrity and elasticity, and the stability of the highway subgrade can be effectively ensured by arranging the semi-rigid base on the subgrade. However, the semi-rigid base layer is very easy to crack due to untimely maintenance during construction or under the influence of temperature change, if the surface layer is a cement concrete pavement structure, the influence of the crack generated by the semi-rigid base layer on the cement concrete pavement is not obvious in a short period, but for the asphalt concrete pavement, the crack of the semi-rigid base layer can be upwards reflected to the asphalt concrete pavement in the early stage of road operation, so that the asphalt concrete pavement generates a reflection crack, and the stress absorption film material can effectively prevent and control the generation and development of the reflection crack.
The existing commonly used stress absorbing layer is a rubber asphalt stress absorbing layer prepared from waste tires, rubber powder with different thicknesses is prepared from the waste tires through industrial processing, the rubber powder can be applied to infrastructure construction through formation, and the rubber powder can be reacted and fused with asphalt to prepare rubber asphalt, so that a good prevention and control effect on cracks is formed.
In view of the above-mentioned related technologies, the inventor believes that in the existing technical solution of preparing the stress absorbing material by mixing rubber and asphalt, the mechanical strength of the prepared rubber and asphalt stress absorbing film is deficient due to poor bonding strength between the rubber particles and the asphalt and poor durability of the rubber particles.
Disclosure of Invention
In order to overcome the defect that the mechanical property of a stress absorption film material is poor, the application provides a high-strength stress absorption film material and a preparation method thereof, and the following technical scheme is adopted:
in a first aspect, the present application provides a high-strength stress absorption film material, which adopts the following technical scheme:
a high-strength stress absorption film material comprises a base cloth layer and an absorption layer, wherein the absorption layer comprises the following substances in parts by weight: 6-8 parts of HDPE resin; 35-45 parts of matrix asphalt; 10-15 parts of modified fiber; the modified fiber comprises thermoplastic elastomer fiber with the diameter of 0.2-0.5 mm.
Through adopting above-mentioned technical scheme, because this application has adopted the discarded rubber tire or the rubber granule material that the thermoplastic elastomer adopted in replacing the traditional scheme, through the good elastic strength that the elastomer has, make it in the use, optimize the stress absorption intensity to the stress absorption membrane, this application has adopted fibrous structure to replace traditional rubber powder structure simultaneously, form good entanglement of performance through the fiber material between to resin and pitch, thereby further improve the high strength stress that the stress absorption membrane material can bear in actual use and restoration, thereby effectively improved stress absorption membrane material mechanical properties.
Further, the modified fiber also comprises aramid fiber, and the mass ratio of the aramid fiber to the thermoplastic elastomer is 2-3: 1.
By adopting the technical scheme, since the aramid fiber is added into the stress absorption membrane material for modification, the aramid fiber has the characteristics of high strength and high modulus and has excellent performances of high temperature resistance, corrosion resistance, low density and the like, and the aramid fiber is added into the stress absorption membrane material to be used as a framework of an internal structure of the absorption membrane, so that the pressure borne by the stress membrane is effectively dispersed, the stress is uniformly dispersed and effectively relieved, and the mechanical property of the stress absorption membrane material is further improved.
Further, the aramid fiber is surface-modified aramid fiber, and the surface-modified aramid fiber is prepared by the following method:
(1) adding aramid fibers into a calcium chloride solution according to the mass ratio of 1: 6-8, carrying out heat preservation reaction at 75-80 ℃, standing and cooling to room temperature, washing and drying to obtain modified aramid fibers;
(2) respectively weighing 45-50 parts by weight of dopamine aqueous solution, 10-15 parts by weight of modified aramid fiber and 45-50 parts by weight of deionized water, stirring, mixing, standing for 20-24 hours, centrifuging, collecting lower-layer precipitates, and performing vacuum freeze drying to obtain the modified filling fiber.
Through adopting above-mentioned technical scheme, because this application is earlier through calcium chloride modified aramid fiber, take place the complex reaction through calcium chloride and aramid fiber, the hydrogen bond between aramid fiber molecular chain has been destroyed, lead to the regularity of aramid fiber molecular chain to be destroyed, fibrous surface structure is destroyed, make its surface form unevenness's structure, rethread polydopamine modification back, the polydopamine coating of fibre surface can form good compatibility with the asphalt material, thereby in the in-service use process, through the fibre that the cladding has polydopamine coating, effectively improve its bonding strength with the pitch, thereby effectively improved stress absorption membrane material mechanical properties.
Further, the thermoplastic elastomer fiber is prepared by melt spinning of a thermoplastic elastomer, and the thermoplastic elastomer comprises any one or more of SBS resin, TPV resin or TPU resin.
Through adopting above-mentioned technical scheme, because this application chooses for use the thermoplastic elastomer to prepare as the main material, because the thermoplastic elastomer can form good thermoplastic elastomer fibre at its processing temperature melt spinning, these types of resins that this application adopted simultaneously, the cost is lower, be convenient for processing and shaping, have simplified the time of preparation, have improved the efficiency of processing.
Further, the absorption layer further comprises 3-5 parts by weight of silica sol, and the solid content of the silica sol is 15%.
By adopting the technical scheme, the stress absorption membrane material is modified by adopting the silica sol, and the silica sol is nano-level silica particles and is added into the stress absorption membrane material prepared from the asphalt, so that the mechanical property of the stress absorption membrane material can be effectively improved, and the internal structure of the stress absorption membrane material is effectively improved by dispersing the silica sol in the stress absorption membrane material, so that the mechanical property of the stress absorption membrane material is effectively improved.
Further, the base cloth layer is any one of glass fiber cloth or filament polyester geotextile.
Through adopting above-mentioned technical scheme, because this application chooses for use glass fiber cloth or filament polyester geotechnique cloth that has higher mechanical strength from as the raw materials, make it in the use, through the payload pitch material and form good mechanics bearing effect, make its in-process at actual preparation, can effectively improve stress absorption membrane material mechanical properties, glass fiber and polyester geotechnique cloth all have good joint strength with the pitch material simultaneously, have effectively improved stress absorption membrane material's mechanical properties.
In a second aspect, the present application provides a method for preparing a high-strength stress absorbing film material, including: s1, preparing the entanglement modified fiber: respectively weighing 45-50 parts by weight of absolute ethyl alcohol, 3-5 parts by weight of extruded fiber, 6-10 parts by weight of modified filling fiber and 1-2 parts by weight of silane coupling agent, mixing, grinding and sieving with a 100-mesh sieve to obtain entangled modified fiber; s2, asphalt preheating: taking matrix asphalt, placing at 175-180 ℃, and carrying out heat preservation and preheating for 25-30 min to obtain preheated matrix asphalt; s3, HDPE swelling: weighing HDPE according to the formula, adding the HDPE into preheated matrix asphalt, and carrying out heat preservation and swelling to obtain a mixed swelling material; s4, stirring and shearing: respectively weighing the mixed swelling material, the entangled modified fiber and the silica sol according to the formula, placing the materials in a stirring device, stirring and shearing, collecting the sheared materials, and performing heat preservation and development to obtain sheared materials; and S5, pouring the shearing material on the surface of the glass fiber cloth, standing and cooling to room temperature, cutting and winding to obtain the high-strength stress absorbing film material.
Through adopting above-mentioned technical scheme, because this application is earlier through effectively entangling modified aramid fiber and elastomer fiber to supplementary silane coupling agent is modified material, when the crack produces, aramid fiber structure effectively fixes the structural configuration of stress absorption membrane material, rethread elastic fiber is as good stress uninstallation fibre, makes holistic stress absorption membrane have good service strength, follow-up cover on base member cloth surface of watering simultaneously, the structural strength of stress absorption membrane material has effectively been stabilized, thereby stress absorption membrane material mechanical properties has effectively been improved.
Further, the shore hardness of the UHMWPE extrusion coating elastic material in step S3 is 45D.
By adopting the technical scheme, the Shore hardness of the prepared UHMWPE is optimized by adopting the paraffin oil as the modified material, on one hand, the addition and introduction of the paraffin oil can reduce the overall system viscosity of the UHMWPE and improve the molding processing fluidity of the ultrahigh molecular weight polyethylene, and on the other hand, the ultrahigh molecular weight polyethylene has an obvious pressure oscillation phenomenon in the extrusion process, so that the processing window is narrow, and therefore, the pressure oscillation which can be effectively relieved by adding the paraffin oil can improve the stability of the ultrahigh molecular weight polyethylene in the processing process.
Further, the thickness of the shear material casting in the step S5 is 0.8-1.2 mm.
Through adopting above-mentioned technical scheme, this application is watered through optimizing the shearing material and is covered thickness, prevents that its thickness is too high to lead to the bonding strength between absorbed layer and the base cloth layer not good, easily produces the phenomenon of segregation under the high-strength pressure effect, also can effectively prevent the absorbed layer simultaneously and too thin reduced the mechanical strength of whole stress absorption membrane material, and then effectively improved the durability of stress absorption membrane material.
In summary, the present application includes at least one of the following beneficial technical effects:
first, this application has adopted the discarded rubber tire or the rubber granule material that the thermoplastic elastomer adopted in replacing the traditional scheme, through the good elastic strength that the elastomer has, make it in the use, optimize the stress absorption intensity to the stress absorption membrane, this application has adopted fibrous structure to replace traditional rubber powder structure simultaneously, through the fibrous material to forming good entanglement of performance between resin and the pitch, thereby further improve the stress that can bear in the in-service use and the restoration of stress absorption membrane material, thereby effectively improved stress absorption membrane material mechanical properties.
Secondly, this application is modified through having added aramid fiber in stress absorption membrane material, because aramid fiber has high strength and high modulus's characteristics, still has simultaneously high temperature resistant, corrosion-resistant, density low grade excellent performance, adds it to stress absorption membrane material inside, makes it as the skeleton of absorption membrane inner structure, the pressure that the effective dispersion stress membrane received to evenly disperse and effective unloading, further improved stress absorption membrane material mechanical properties.
Third, this application is through calcium chloride modified aramid fiber, take place the complex reaction through calcium chloride and aramid fiber, it is destroyed aramid fiber surface structure and is destroyed, make its surface form unevenness's structure, behind the modification treatment of rethread polydopamine, the polydopamine coating on fibrous surface can form good compatibility ability with the asphalt material, thereby in the in-service use process, through the fibre that the cladding has polydopamine coating, effectively improve its bonding strength with the pitch, thereby effectively improved stress absorption membrane material mechanical properties.
Fourth, this application chooses glass fiber cloth or filament polyester geotechnological cloth that has higher from mechanical strength as the raw materials, makes it in the use, through effective load pitch material and form good mechanics bearing effect, makes it in the in-process of actual preparation, can effectively improve stress absorption membrane material mechanical properties.
Detailed Description
The present application will be described in further detail with reference to examples.
In the examples of the present application, the raw materials used are as follows, but not limited thereto:
raw materials:
SBS resin: SBS resin with the trade name KY1303H, produced by Jinhua market Baojia plastic science and technology Limited.
TPV resin: TPV resin manufactured by Dongguan Shanghai Chong Plastic Co., Ltd under the trademark GPV30C 1.
TPU resin: TPV resin with the product number of 55A-75D produced by Fushan City minister trade Co.
Examples
Preparation example 1
Preparing modified aramid fibers: adding 1000g of aramid fiber into 6000g of calcium chloride solution with mass fraction of 8%, reacting for 3h at 75 ℃, standing and cooling to room temperature, washing for 3 times by using deionized water, and drying to obtain pretreated aramid fiber; taking 100g of the pretreated aramid fiber, 450g of dopamine aqueous solution with the mass fraction of 2% and 450g of deionized water, stirring, mixing, standing at room temperature for 20 hours, performing centrifugal separation, collecting lower-layer precipitates, and performing vacuum freeze drying to obtain modified aramid fiber 1;
preparing thermoplastic elastomer fibers: taking 1000g of thermoplastic elastomer, placing the thermoplastic elastomer into a trace mixing extruder, carrying out melt spinning treatment, collecting spinning blending elastomer fibers, controlling the spinning temperature to be 160 ℃, the winding temperature to be 15r/min and the screw rotation speed to be 25r/min, and collecting thermoplastic elastomer fibers 1 with the diameter of 0.2mm, wherein the thermoplastic elastomer is SBS resin, TPV resin and TPU resin which are mixed in equal mass.
Preparation example 2
Preparing modified aramid fibers: adding 1000g of aramid fiber into 7000g of calcium chloride solution with mass fraction of 8%, reacting at 77 ℃ for 4h, standing, cooling to room temperature, washing with deionized water for 4 times, and drying to obtain pretreated aramid fiber; taking 125g of the pretreated aramid fiber, 475g of dopamine aqueous solution with the mass fraction of 2% and 475g of deionized water, stirring, mixing, standing at room temperature for 22 hours, performing centrifugal separation, collecting lower-layer precipitates, and performing vacuum freeze drying to obtain modified aramid fiber 2;
preparing thermoplastic elastomer fibers: taking 1500g of thermoplastic elastomer, placing the thermoplastic elastomer in a trace mixing extruder, carrying out melt spinning treatment, collecting spinning blended elastomer fibers, controlling the spinning temperature to be 165 ℃, the winding temperature to be 17r/min and the screw rotation speed to be 26r/min, and collecting thermoplastic elastomer fibers 2 with the diameter of 0.3mm, wherein the thermoplastic elastomer is SBS resin, TPV resin and TPU resin which are mixed in equal mass.
Preparation example 3
Preparing modified aramid fibers: adding 1000g of aramid fiber into 8000g of calcium chloride solution with the mass fraction of 8%, preserving heat at 80 ℃ for reaction for 5 hours, standing and cooling to room temperature, washing with deionized water for 5 times, and drying to obtain pretreated aramid fiber; taking 150g of the pretreated aramid fiber, 500g of dopamine aqueous solution with the mass fraction of 2% and 500g of deionized water, stirring, mixing, standing at room temperature for 24 hours, performing centrifugal separation, collecting lower-layer precipitates, and performing vacuum freeze drying to obtain modified aramid fiber 3;
preparing thermoplastic elastomer fibers: taking 2000g of thermoplastic elastomer, placing the thermoplastic elastomer into a trace mixing extruder, carrying out melt spinning treatment, collecting spinning blending elastomer fibers, controlling the spinning temperature to be 170 ℃, the winding temperature to be 18r/min and the screw rotation speed to be 28r/min, and collecting thermoplastic elastomer fibers 3 with the diameter of 0.5mm, wherein the thermoplastic elastomer is SBS resin, TPV resin and TPU resin which are mixed in equal mass.
Example 1
Respectively weighing 450g of absolute ethyl alcohol, 30g of thermoplastic elastomer fiber 1, 60g of modified aramid fiber 1 and 10g of silane coupling agent, mixing, grinding and sieving by a 100-mesh sieve to obtain entanglement modified fiber; taking No. 90 matrix asphalt for preheating treatment, controlling the preheating temperature to be 175 ℃, keeping the temperature for preheating for 25min, adding 1kg of HDPE into 6kg of preheated matrix asphalt according to the mass ratio of 1:6, and keeping the temperature for swelling for 10min to obtain a mixed swelling material; respectively weighing 450g of mixed swelling material, 100g of entangled modified fiber and 30g of silica sol with the solid content of 15%, placing the materials in a stirring device, stirring and shearing for 25min, collecting the shearing material, preserving the heat for development for 1h, pouring the shearing material onto the surface of glass fiber cloth while the shearing material is hot, controlling the thickness of the pouring material to be 0.8mm, standing and cooling the glass fiber cloth to room temperature, cutting and winding the glass fiber cloth to obtain the high-strength stress absorbing film material.
Example 2
Respectively weighing 475g of absolute ethyl alcohol, 40g of thermoplastic elastomer fiber 2, 80g of modified aramid fiber 2 and 15g of silane coupling agent, mixing, grinding and sieving by a 100-mesh sieve to obtain entangled modified fiber; taking No. 90 matrix asphalt for preheating treatment, controlling the preheating temperature to be 177 ℃, keeping the temperature for preheating for 27min, adding 1kg of HDPE into 7kg of preheated matrix asphalt according to the mass ratio of 1:7, and keeping the temperature for swelling for 12min to obtain a mixed swelling material; respectively weighing 475g of mixed swelling material, 125g of entangled modified fiber and 40g of silica sol with the solid content of 15%, placing the materials in a stirring device, stirring and shearing for 27min, collecting the shearing material, preserving the temperature and developing for 1h, pouring the shearing material onto the surface of glass fiber cloth while the shearing material is hot, controlling the thickness of the pouring material to be 1mm, standing and cooling the glass fiber cloth to room temperature, cutting and winding the glass fiber cloth to obtain the high-strength stress absorbing film material.
Example 3
4500g of absolute ethyl alcohol, 50g of thermoplastic elastomer fiber 3, 100g of modified aramid fiber 3 and 20g of silane coupling agent are respectively weighed, mixed, ground and sieved by a 100-mesh sieve to obtain entanglement modified fiber; taking No. 90 matrix asphalt for preheating treatment, controlling the preheating temperature at 180 ℃, preserving heat and preheating for 30min, adding 1kg of HDPE into 8kg of preheated matrix asphalt according to the mass ratio of 1:8, preserving heat and swelling for 15min to obtain a mixed swelling material; respectively weighing 500g of mixed swelling material, 150g of entangled modified fiber and 50g of silica sol with the solid content of 15%, placing the materials in a stirring device, stirring and shearing for 30min, collecting the shearing material, preserving the heat for 2h, pouring the shearing material onto the surface of glass fiber cloth while the shearing material is hot, controlling the thickness of the pouring material to be 1.2mm, standing and cooling the glass fiber cloth to room temperature, cutting and winding the glass fiber cloth to prepare the high-strength stress absorbing film material.
Example 4
In example 4, only the thermoplastic elastomer fiber was used as the modified fiber to prepare a stress absorbing film material, and the other conditions and components were the same as those of example 1.
Example 5
The stress absorbing film material was prepared using unmodified aramid fibers and the thermoplastic elastomer to prepare modified fibers in example 5, with the same conditions and components as in example 1.
Example 6
The elastic fiber prepared by using only 30g of pure SBS resin in example 6 was used instead of the elastic fiber in example 1 to prepare the stress absorbing film material, and the remaining conditions and components were the same as the component ratio of example 1.
Example 7
The elastomer fiber of example 7, prepared using only 30g of pure TPV resin, was used in place of the elastomer fiber of example 1 to prepare a stress absorbing film material, and the remaining conditions and components were the same as those of example 1.
Example 8
The elastomeric fiber of example 8, prepared using only 30g of pure TPU resin, was used in place of the elastomeric fiber of example 1 to prepare a stress absorbing film material, with the remaining conditions and components being the same as the component ratios of example 1.
Performance test
The mechanical properties of the stress absorption films prepared in examples 1 to 8 were measured.
Detection method/test method
(1) Forming the cement board: and rolling and forming the cement stable base layer by adopting a track plate forming machine, and rolling and forming. The mold can be removed after 2 days of wet culture, and the thickness of the cement board is 5 cm.
(2) And (3) additionally laying a stress absorption layer of 2cm on the prepared cement board.
(3) The stress absorbing film of the example was then overlaid on top of the stress absorbing layer using a thickened rut plate experiment. And cooling for 48 hours, and then removing the mold.
(4) Finally, coring is carried out by a core drilling machine with the diameter of being equal to the diameter of the stress absorption film, and the mechanical property of the stress absorption film is measured.
The specific detection results are shown in the following table 1:
table 1 table for testing performance of stress absorbing film in examples 1 to 8
Figure 502194DEST_PATH_IMAGE002
Referring to the comparison of the performance tests of table 1, it can be found that:
the performances of the stress absorption film materials prepared in the embodiments 1-3 are compared, so that the mechanical performance of the stress absorption film material in the embodiment 2 is obviously improved, and the stress absorption film material in the embodiment 2 is suitable for the component proportion.
Comparing the performances of the embodiment 1 and the embodiment 4, as the embodiment 4 only adopts the thermoplastic elastomer fiber as the modified fiber to prepare the stress absorbing film material, and the performance of the embodiment 4 is obviously reduced, it is shown that the aramid fiber is added in the stress absorbing film material to modify, the pressure applied to the stress film is effectively dispersed, so that the stress is uniformly dispersed and effectively discharged, and the mechanical property of the stress absorbing film material is further improved.
Comparing the performances of example 1 and example 5, since the unmodified aramid fiber and the thermoplastic elastomer are used to prepare the modified fiber in example 5 to prepare the stress absorbing film material, and the performance of example 5 is significantly reduced, this shows that the modified aramid fiber of the present technical scheme effectively improves the bonding strength between the modified aramid fiber and the asphalt through the fiber coated with the polydopamine coating, thereby effectively improving the mechanical properties of the stress absorbing film material.
The performance of the embodiment 1 is compared with that of the embodiments 6 to 8, and the stress absorption film material is prepared by adjusting the composition of the thermoplastic elastomer in the embodiments 6 to 8, and the performance of the embodiment 5 is significantly reduced, which shows that the mechanical property of the stress absorption film material is significantly improved by adopting a multi-component mixed preparation scheme in the technical scheme of the application.
Comparative example
Comparative example 1
In comparative example 1, aramid fibers are directly used to replace the modified fibers in example 1 of the present application, and the rest conditions and components are the same as the component ratio of example 1.
Comparative example 2
In comparative example 2, 100-mesh thermoplastic elastomer particles were used as a substitute for the modified fibers in the preparation of the stress absorbing film material, and the remaining conditions and components were the same as those in example 1.
Comparative example 3
In comparative example 3, no silica sol was added during the preparation of the stress absorbing film material, and the remaining conditions and components were the same as those of example 1.
Comparative example 4
In comparative example 4, the shear-applied thickness was adjusted to 0.5mm, and the other conditions and components were the same as those of example 1.
Comparative example 5
In comparative example 5, the shear-applied thickness was adjusted to 1.5mm, and the other conditions and components were the same as those of example 1.
The specific detection results are shown in the following table 2:
TABLE 2 comparative examples 1-5 Performance test Table
Figure 888176DEST_PATH_IMAGE004
Referring to the comparison of the performance tests of table 2, it can be found that:
compared with the example 1, the comparison of the comparative example 1 and the example 1 shows that the mechanical property of the comparative example 1 is remarkably reduced from the table 2, and the application can show that the whole stress absorption film has good use strength by effectively intertwining the modified aramid fiber and the elastomer fiber, assisting the silane coupling agent to be a modified material and taking the elastomer fiber as a good stress unloading fiber, and meanwhile, the structural strength of the stress absorption film material is effectively stabilized by subsequently pouring the elastic fiber on the surface of the base cloth, so that the mechanical property and the durability of the stress absorption film material are effectively improved.
Comparing comparative example 2 with example 1, it can be seen that, in comparative example 2, 100-mesh thermoplastic elastomer particles are used as a substitute material for the modified fibers in the preparation process of the stress absorbing film material, and as can be seen from table 2, the mechanical properties of the modified fibers are significantly reduced, which indicates that the elastic fibers are used as good stress unloading fibers, so that the stress absorbing film has good use strength, and the mechanical properties and durability of the stress absorbing film material are effectively improved.
Comparing the performance of the comparative example 3 with that of the example 1 shows that, in the preparation process of the stress absorbing film material, the comparative example 3 does not add silica sol and the mechanical property is slightly reduced, which shows that the modification of the silica sol effectively improves the internal structure of the stress absorbing film material, thereby effectively improving the mechanical property and the durability of the stress absorbing film material.
Compare comparative example 4 ~ 5 with this application embodiment 1, because comparative example 4 ~ 5 adjusted the thickness of watering of shearing material, lead to mechanical properties to descend to some extent, this application is through optimizing the thickness of watering of shearing material, prevent that its thickness is too high to lead to the bonding strength between absorbed layer and the base cloth layer not good, easily produce the phenomenon of segregation under the high-strength pressure effect, also can effectively prevent the absorbed layer too thin simultaneously and reduce the mechanical strength of whole stress absorption membrane material, and then effectively improved the durability of stress absorption membrane material.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (5)

1. The high-strength stress absorption film material is characterized by comprising a base cloth layer and an absorption layer, wherein the absorption layer comprises the following substances in parts by weight:
6-8 parts of HDPE resin;
35-45 parts of matrix asphalt;
10-15 parts of modified fiber;
3-5 parts of silica sol with the solid content of 15%, wherein the modified fiber comprises thermoplastic elastomer fiber with the diameter of 0.2-0.5 mm; the thermoplastic elastomer fiber is prepared by melt spinning of a thermoplastic elastomer, and the thermoplastic elastomer comprises any one or more of SBS resin, TPV resin or TPU resin; the thickness of the absorption layer is 0.8-1.2 mm.
2. A high-strength stress absorption film material as claimed in claim 1, wherein the modified fibers further comprise aramid fibers, and the mass ratio of the aramid fibers to the thermoplastic elastomer fibers is 2-3: 1.
3. The high-strength stress absorption film material according to claim 2, wherein the aramid fiber is a surface-modified aramid fiber, and the surface-modified aramid fiber is prepared by the following method:
(1) adding aramid fibers into a calcium chloride solution according to the mass ratio of 1: 6-8, carrying out heat preservation reaction at 75-80 ℃, standing and cooling to room temperature, washing and drying to obtain modified aramid fibers;
(2) respectively weighing 45-50 parts by weight of dopamine aqueous solution, 10-15 parts by weight of modified aramid fiber and 45-50 parts by weight of deionized water, stirring, mixing, standing for 20-24 hours, centrifuging, collecting lower-layer precipitates, and performing vacuum freeze drying to obtain the modified filling fiber.
4. A strong stress-absorbing film according to claim 1, wherein said base fabric layer is one of glass fiber cloth and filament polyester geotextile.
5. A method for preparing a high-strength stress absorbing film material according to any one of claims 1 to 4, wherein the step of preparing the high-strength stress absorbing film material comprises:
s1, preparing the entanglement modified fiber: respectively weighing 45-50 parts by weight of absolute ethyl alcohol, 3-5 parts by weight of thermoplastic elastomer fiber, 6-10 parts by weight of modified filling fiber and 1-2 parts by weight of silane coupling agent, mixing, grinding and sieving with a 100-mesh sieve to obtain entangled modified fiber;
s2, asphalt preheating: taking matrix asphalt, placing at 175-180 ℃, and carrying out heat preservation and preheating for 25-30 min to obtain preheated matrix asphalt;
s3, HDPE swelling: weighing HDPE according to the formula, adding the HDPE into preheated matrix asphalt, and carrying out heat preservation and swelling to obtain a mixed swelling material;
s4, stirring and shearing: respectively weighing the mixed swelling material, the entangled modified fiber and the silica sol according to the formula, placing the materials in a stirring device, stirring and shearing, collecting the sheared materials, and performing heat preservation and development to obtain sheared materials;
and S5, pouring the shearing material on the surface of the glass fiber cloth, standing and cooling to room temperature, cutting and winding to obtain the high-strength stress absorbing film material.
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