CN115196868A

CN115196868A - Carbon fiber rainwater collection module core material and preparation method thereof

Info

Publication number: CN115196868A
Application number: CN202210912428.8A
Authority: CN
Inventors: 邱峰
Original assignee: Suzhou Mahayana Environmental Protection New Material Co ltd
Current assignee: Suzhou Mahayana Environmental Protection New Material Co ltd
Priority date: 2022-07-30
Filing date: 2022-07-30
Publication date: 2022-10-18
Anticipated expiration: 2042-07-30
Also published as: CN115196868B

Abstract

The application relates to the technical field of inorganic fiber materials, and particularly discloses a carbon fiber rainwater collection module core material and a preparation method thereof. The carbon fiber rainwater collection module core material is prepared from the following raw materials in parts by weight: 60-80 parts of mineral raw materials, 5-10 parts of carbon fibers and 3-5 parts of a binder; the mineral raw materials are a mixture of volcanic rock, limestone and coke, and the mass ratio of the volcanic rock, the limestone and the coke is (3-7): (1-5): (1-3). The preparation method of the carbon fiber rainwater collection module core material comprises the following steps: mixing the raw materials in parts by weight, and heating and melting; melt the formed melt, centrifugal spinning and cooling to form inorganic fiber; and placing the inorganic fiber in a mold to be extruded and molded into a cuboid core material. The utility model provides a module core is collected to carbon fibre rainwater has good compressive strength, hydroscopicity and the rate of permeating water.

Description

Carbon fiber rainwater collection module core material and preparation method thereof

Technical Field

The application relates to the technical field of inorganic fiber materials, in particular to a carbon fiber rainwater collection module core material and a preparation method thereof.

Background

Rainwater collection becomes more and more important due to shortage of water resources in China. The rainwater collection module can effectively collect rainwater, the rainwater collected by the rainwater collection module can solve the problem of water resource shortage, and the rainwater collection module is buried underground without destroying the ecological environment and can be recycled.

Most of the existing rainwater collection modules comprise a core material with good water absorbability and a permeable surface cloth wrapping the core material, wherein the core material is buried underground, so that the bearing capacity is poor, and the service life of the rainwater collection module can be shortened.

In view of the above-mentioned related art, the inventors have considered that the core material of the conventional rainwater collection module has a problem of poor compressive strength, thus limiting the use and development thereof.

Disclosure of Invention

In order to improve the compressive strength of the rainwater collection module core material, the application provides the carbon fiber rainwater collection module core material and the preparation method thereof.

First aspect, the application provides a carbon fiber rainwater collection module core, adopts following technical scheme:

a carbon fiber rainwater collection module core material is prepared from the following raw materials in parts by weight: 60-80 parts of mineral raw materials, 5-10 parts of carbon fibers and 3-5 parts of a binder; the mineral raw materials are a mixture of volcanic rock, limestone and coke, and the mass ratio of the volcanic rock, the limestone and the coke is (3-7): (1-5): (1-3).

By adopting the technical scheme, the volcanic rock surface is uniformly distributed with air holes, has no sharp particles, has small resistance to water flow, not only has stronger water absorption and water permeability, but also can resist the shearing action of water power with different strengths, and has excellent mechanical strength; volcanic rock has the characteristics of porosity and large surface area, can adsorb harmful bacteria in water and heavy metal ions such as chromium, arsenic and the like which have influence on organisms, even contains residual chlorine in water, and has good adsorption and filtration effects on pollutants in water;

dissolving limestone in underground water or surface water to form an over-saturated calcium carbonate solution, and slowly precipitating the over-saturated calcium carbonate solution through the physical and chemical actions in the nature to gradually agglomerate to form absorbent stones;

the coke is a solid product of high-temperature dry distillation, has a crack and irregular Kong Bao porous structure, is expanded when meeting water and has good water absorption;

the carbon fiber has good mechanical strength, is used as a reinforcing material, has the biggest characteristic of high tensile strength, is an inorganic fiber, has good chemical resistance, and is added on the carbon fiber rainwater collection module core material to effectively improve the compressive strength of the core material.

The carbon fibers and the inorganic mineral are well bonded together by the bonding agent, so that the compatibility among all components of the carbon fiber rainwater collection module core material is improved.

In conclusion, the carbon fiber rainwater collecting material is reasonable in formula, and under the combined action of the components, the prepared carbon fiber rainwater collecting material has excellent water absorption and water permeability and higher compressive strength.

In a specific embodiment, the carbon fibers are 1-3mm chopped carbon fibers.

By adopting the technical scheme, the short fiber is made of carbon fibers through a fiber cutting machine, the strength of the short fiber is higher than that of steel, the density of the short fiber is lower than that of aluminum, the short fiber is more corrosion-resistant than stainless steel, the short fiber has more excellent mechanical properties than common carbon fibers, and the compressive strength of the carbon fiber rainwater collection module core material can be further improved.

In a specific possible embodiment, the binder is a mixture of sodium silicate, palygorskite powder and sepiolite wool, and the mass ratio of the sodium silicate to the palygorskite powder is (8-10): (1-5): (1-3).

By adopting the technical scheme, the sodium silicate is a mineral adhesive, when the non-metallic material is bonded, the active points on the surface of the bonded substrate form an oxide film under the action of oxygen, the oxide film can activate terminal hydroxyl groups under the action of water, and silicate ions can react with the terminal hydroxyl groups to form-Si-O-, so that different inorganic substances are bonded.

The palygorskite powder belongs to sepiolite group in the mineralogical classification and is a crystalline hydrated magnesium aluminum silicate mineral; the palygorskite powder has unique layer chain structure characteristics, lattice displacement exists in the structure, and crystals are in a symptom shape, a fiber shape or a fiber aggregation shape; meanwhile, the adhesive has an intermediate structure between a chain structure and a layered structure, and has good bonding capability with mineral raw materials and fibers.

The sepiolite wool is prepared from sepiolite, is a white high-magnesium fibrous laurate clay mineral which is light in weight and can float on the water surface, has good mixing property with sodium silicate and palygorskite powder, and can improve the compatibility of mineral raw materials and carbon fibers.

In conclusion, the binding agent consisting of the sodium silicate, the palygorskite powder and the sepiolite wool has good binding property to the mineral raw materials and the carbon fibers, and the compatibility of the mineral raw materials and the carbon fibers is further improved by controlling the mass ratio of the sodium silicate, the palygorskite powder and the sepiolite wool.

In a specific embodiment, the binder is prepared by the following steps: mixing and stirring sodium silicate, palygorskite powder and sepiolite wool, wherein the stirring speed is 1500-2000r/min, and the mixing time is 30-60min.

By adopting the technical scheme, the preparation method is simple, and the preparation efficiency can be improved by controlling the stirring speed and the mixing time.

In a second aspect, the application provides a preparation method of a carbon fiber rainwater collection module core material, which adopts the following technical scheme:

a preparation method of a carbon fiber rainwater collection module core material comprises the following steps:

mixing and heating and melting the raw materials in parts by weight;

melt the formed melt, centrifugal spinning and cooling to form inorganic fiber;

and placing the inorganic fiber in a mould to be extruded and molded into a cuboid core material.

By adopting the technical scheme, the preparation method of the carbon fiber rainwater collection module core material is simple in process and low in cost, and the prepared carbon fiber rainwater collection module core material has the characteristics of high compressive strength, high water absorption rate and high water permeability.

In a specific practical implementation scheme, the raw materials are heated and melted by a smelting furnace, the heating temperature is 900-1300 ℃, the pressure is 15-20MPa, and the rotating speed is 350-450r/min.

By adopting the technical scheme, each parameter of the raw materials during heating and melting is optimized, so that the carbon fiber rainwater collection module core material is more favorably prepared, and the preparation efficiency is improved.

In a specific embodiment, the melting is carried out by introducing a combustion aid selected from air, oxygen or oxygen-enriched air into the furnace.

By adopting the technical scheme, the carbon-containing raw materials in the premelting furnace are subjected to combustion reaction in air, oxygen or oxygen-enriched air, and the heat emitted by the reaction enables other raw materials to reach the melting temperature, so that the overall melting speed of the raw materials is improved, and the preparation speed of the carbon fiber rainwater collection module core material is further accelerated.

In a specific embodiment, the component materials are mixed by ball milling to reduce the average particle size of the mixture to 50-100 mesh.

By adopting the technical scheme, the mixture is crushed to the enough fineness to obtain higher powder uniformity and contact area, so that the melting rate of the mixture under the high-temperature condition of the melting furnace is accelerated, the melt components are uniform, and the quantity of unmelted objects in the melt is less; when the size of the mixture is large, the external surface area of the mixture is small, the material melting speed in the melting furnace is low, the size is small, the gas flow in the melting furnace is unsmooth, the resistance of a bed layer is large, the components of the melt are not uniform enough, the melt is easy to contain unmelted materials, the quality of the prepared inorganic fiber is reduced, the fiber is not long enough, the strength is not high enough, and the compressive strength of the finally prepared carbon fiber rainwater collection core material is reduced.

In a specific possible embodiment, the melt is flapped by a roller type flail mill, and the rotating speed of the flail mill is 5500-7000r/mim; the diameter of the inorganic fiber is 1-10mm, and the length-diameter ratio is 10-100.

By adopting the technical scheme, the rotating speed of the spinning roller and the diameter of the prepared inorganic fiber are controlled, so that the compressive strength and the water absorption of the prepared carbon fiber rainwater collection module core material are better.

In a specific embodiment, the inorganic fibers are extruded in a die at a pressure of 5 to 10MPa for a time of 0.5 to 1 hour.

Through adopting above-mentioned technical scheme, pressure and time when control extrusion for the core shaping of carbon fiber rainwater collection module is fast, does not produce the compressive strength that the product was influenced in the space.

In summary, the present application has the following beneficial effects:

1. according to the carbon fiber rainwater collection module core material, the mineral raw materials and the carbon fibers are added into the carbon fiber rainwater collection module core material, the mineral raw materials comprise volcanic rock, limestone and coke in a certain proportion, the volcanic rock, the limestone and the coke are porous in surface and have excellent water absorption and water permeability, the water absorption and water permeability of the carbon fiber rainwater collection module core material are ensured, and the compressive strength of the carbon fiber rainwater collection module core material is improved through the carbon fibers, so that the carbon fiber rainwater collection module core material not only has excellent absorption and water permeability, but also has good compressive strength;

2. according to the application, sodium silicate, palygorskite powder and sepiolite wool in a certain ratio are added into a carbon fiber rainwater collection module core material as an adhesive, so that the compatibility of a mineral raw material and carbon fibers is good;

3. according to the method, the average particle size of the mixture is controlled, so that the powder has a high melting speed in the melting furnace, the obtained melt is uniform in component, and meanwhile, the unmelted substances in the melt are reduced.

Detailed Description

The present application will be described in further detail with reference to the following preparation examples and examples.

Among the relevant raw materials used in the preparation examples and examples:

the average particle size of the volcanic rock is 6-9mm; limestone was purchased from Liaoning middling mechanical equipment, inc.; the particle size of the coke is 40-60 meshes; the chopped carbon fiber is purchased from Shanghaihong composite science and technology company; sodium silicate was purchased from johnson georges technologies ltd; the specific surface area of the palygorskite powder is 9.6-36m ² (ii)/g; the sepiolite velvet had a velvet length of 3mm.

Preparation example

Preparation examples 1 to 7

As shown in Table 1, the main difference between the preparation examples 1 to 7 is that the raw material ratios of the adhesives were different.

The following description will be made by taking preparation example 1 as an example. The preparation example of the application discloses an adhesive which is prepared by taking 8Kg of sodium silicate, 1Kg of palygorskite powder and 1Kg of sepiolite velvet as raw materials.

The preparation example of the application also discloses a preparation method of the adhesive, which comprises the following specific steps:

weighing sodium silicate, palygorskite powder and sepiolite velvet according to the formula, sequentially adding into a stirrer, and uniformly mixing to obtain the adhesive, wherein the stirring speed is 1500r/min, and the mixing time is 60min.

TABLE 1 compounding ratio of raw materials for adhesives in preparation examples 1-7

Preparation example 8

This preparation is essentially the same as preparation 1, except that: in the preparation method, the stirring speed is 2000r/min, and the mixing time is 30min.

Examples

Examples 1 to 9

As shown in table 2, the main difference between examples 1 to 9 is that the carbon fiber rainwater collection module core material has different raw material ratios.

The following description will be given by taking example 1 as an example. The embodiment of the application discloses a carbon fiber rainwater collection module core material, which is prepared from 36Kg of volcanic rock, 12Kg of limestone, 12Kg of coke, 5Kg of chopped carbon fiber and 3Kg of binder, wherein the binder is obtained by adopting the preparation example 1.

The embodiment also discloses a preparation method of the carbon fiber rainwater collection module core material, which comprises the following specific steps:

s1, weighing the components according to a formula, adding the components into a ball mill to form a mixture, and crushing the average particle size of the mixture to 50-100 meshes;

s2, adding the crushed mixture into a smelting furnace, introducing oxygen into the smelting furnace at the flow rate of 1.2L/min, stirring and heating to 900 ℃ at the speed of 350r/min, keeping the pressure of the smelting furnace at 15MPa, and melting to obtain a melt;

s3, spinning the melt flowing out of the smelting furnace by a spinning machine when the melt passes through a centrifugal roller, and cooling the melt in cold water at the temperature of 10 ℃ to form inorganic fibers, wherein the rotating speed of the spinning machine is 5500r/min, the average diameter of the obtained inorganic fibers is controlled to be 1-10mm, and the length-diameter ratio is 10;

and S4, placing the inorganic fibers in a mold of 120cm multiplied by 25cm multiplied by 40cm for extrusion, wherein the pressure during extrusion is 5Mpa, and the time is 1 hour, so that the rectangular carbon fiber rainwater collection module core material is obtained.

Table 2 proportions of respective raw materials in core material of carbon fiber rainwater collection module in examples 1 to 9

Examples 10 to 16

This example differs from example 1 in that the binders of examples 10-16 were obtained using preparation examples 2-8, as shown in Table 3.

TABLE 3 preparation examples for binders used in examples 10-16

Example 17

The difference between the embodiment and the embodiment 1 is that S2, the crushed mixture is added into a melting furnace, air is introduced into the melting furnace, the air flow rate is 1.5L/min, the mixture is stirred and heated to 1300 ℃ at 450r/min, the pressure of the melting furnace is kept at 20MPa, and a melt is obtained by melting;

s3, spinning the melt flowing out of the smelting furnace by a spinning machine when the melt passes through a centrifugal roller, and cooling the melt in cold water at the temperature of 10 ℃ to form inorganic fibers, wherein the rotating speed of the spinning machine is 7000r/min, the average diameter of the obtained inorganic fibers is controlled to be 1-10mm, and the length-diameter ratio is 100;

and S4, placing the inorganic fibers in a mold of 120cm multiplied by 25cm multiplied by 40cm for extrusion, wherein the pressure during extrusion is 10Mpa, and the time is 0.5h, so that the cuboid carbon fiber rainwater collection module core material is obtained.

Example 18

The difference between the embodiment and the embodiment 1 is that S2, the mixture after being crushed is added into a smelting furnace, oxygen-enriched air is introduced into the smelting furnace, and the air flow rate is 1.4L/min.

Comparative example

Comparative example 1

This comparative example is different from example 1 in that the addition amount of the chopped carbon fibers was 0.

Comparative example 2

This comparative example is different from example 1 in that the amount of chopped carbon fibers added was 20Kg.

Performance test

The carbon fiber rainwater collection module core material obtained in examples 1 to 18 was used in the same weight as the test sample 1 to 18, and the carbon fiber rainwater collection module core material obtained in comparative examples 1 to 2 was used in the same weight as the test sample 1 to 2. The test sample and the control sample were subjected to the performance test, and the results are shown in Table 4.

1. Compressive strength

And (4) respectively testing the compressive strength of the test sample and the control sample by referring to GB/T13480 and GB/T330111-2016, and analyzing and recording the test results, wherein the compressive strength is 25 times of freeze-thaw post-compressive strength.

2. Water absorption property

And (4) respectively carrying out volume water absorption tests on the test sample and the control sample after 25 times of freeze thawing according to reference GB/T33011-2016, and analyzing and recording test results.

3. Water permeability

And (4) respectively testing the effective porosity of the test sample and the control sample by referring to T/CBMCA006-2018, and analyzing and recording the test result.

Table 4 performance test data

Referring to Table 4, in combination with examples 1 to 5, it can be seen that the samples all had good compressive strength, water absorption and water permeability as the mass ratio among volcanic rock, limestone and coke in the mineral raw materials was changed (examples 1 to 3); particularly, when the mass ratio of the volcanic rock, the limestone and the coke is 7:5:3, the water absorption and water permeability of the sample are optimized; furthermore, the water absorption of the sample tends to increase with increasing mineral material content (examples 3-5), but the percentage of chopped carbon fibers in the sample decreases because the compressive strength of the sample decreases.

Referring to table 4, in combination with examples 4, 6 and 7 and comparative examples 1 and 2, it can be seen that the compressive strength of the sample is improved as the amount of chopped carbon fiber added to the sample is increased, because chopped carbon fiber has excellent mechanical strength and high tensile strength, and is added to the sample as a reinforcing material to improve the compressive strength of the sample; however, when the amount of chopped carbon fibers added is too large, the ratio of the mineral raw material in the sample decreases, and the water absorption and water permeability of the sample decrease.

Referring to table 4, in combination with examples 6, 8 and 9, it can be seen that the samples all have excellent water absorption, water permeability and compressive strength by increasing the amount of the binder added in an appropriate range.

Referring to Table 4, in combination with examples 10 to 15, it can be seen that by changing the compounding ratio between the components of the binder in the sample within an appropriate range, the obtained sample still has good compressive strength, water absorption and water permeability.

Referring to Table 4, in combination with examples 16 to 18, it can be seen that the samples obtained by appropriately adjusting the preparation method and the parameters in the implementation method all have good compressive strength, water absorption and water permeability.

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

1. The utility model provides a carbon fibre rainwater collection module core which characterized in that: the feed is prepared from the following raw materials in parts by weight: 60-80 parts of mineral raw materials, 5-10 parts of carbon fibers and 3-5 parts of a binder; the mineral raw materials are a mixture of volcanic rock, limestone and coke, and the mass ratio of the volcanic rock, the limestone and the coke is (3-7): (1-5): (1-3).

2. The carbon fiber rainwater collection module core material according to claim 1, wherein: the carbon fiber is 1-3mm chopped carbon fiber.

3. The carbon fiber rainwater collection module core material according to claim 1, wherein: the binder is a mixture of sodium silicate, palygorskite powder and sepiolite wool, and the mass ratio of the sodium silicate to the palygorskite powder to the sepiolite wool is (8-10): (1-5): (1-3).

4. The carbon fiber rainwater collection module core according to claim 3, wherein: the preparation method of the adhesive comprises the following steps: mixing and stirring sodium silicate, palygorskite powder and sepiolite wool, wherein the stirring speed is 1500-2000r/min, and the mixing time is 30-60min.

5. The method of preparing a carbon fiber rainwater collection module core material according to any one of claims 1 to 4, wherein: the method comprises the following steps:

mixing the raw materials in parts by weight, and heating and melting;

melt the formed melt, centrifugal spinning and cooling to form inorganic fiber;

and placing the inorganic fiber in a mold to be extruded and molded into a cuboid core material.

6. The method of preparing a carbon fiber rainwater collection module core material according to claim 5, wherein: the raw materials are heated and melted by a smelting furnace, the heating temperature is 900-1300 ℃, the pressure is 15-20MPa, and the rotating speed is 350-450r/min.

7. The method of manufacturing a carbon fiber rainwater collection module core according to claim 6, wherein: and one of air, oxygen or oxygen-enriched air is introduced into the smelting furnace to support combustion during the smelting.

8. The method of preparing a carbon fiber rainwater collection module core material according to claim 5, wherein: the raw materials of each component are ground into 50-100 meshes by ball milling during mixing.

9. The method of preparing a carbon fiber rainwater collection module core material according to claim 5, wherein: the melt adopts a roller type wire throwing machine during wire throwing, and the rotating speed of the wire throwing machine is 5500-7000r/mim; the diameter of the inorganic fiber is 1-10mm, and the length-diameter ratio is 10-100.

10. The method of manufacturing a carbon fiber rainwater collection module core according to claim 5, wherein: the pressure of the inorganic fiber in the extrusion in the die is 5-10MPa, and the time is 0.5-1h.