Basalt composite material, preparation method and application thereof

Abstract

The invention relates to the technical field of basalt composite materials, in particular to a preparation method of a basalt composite material, which comprises the following steps: uniformly blending 35-40 parts of thermosetting resin, 4-7 parts of coupling modifier, 5-8 parts of curing agent and 3-5 parts of additive; and fully blending 10-15 parts of basalt fiber with the product obtained in the step 1 to obtain the basalt fiber premix. According to the advanced composite material well lid, thermosetting resin serves as a base material, basalt fibers serve as a reinforcing material, and a suitable forming process is adopted according to different load application scenes, so that the novel environment-friendly well lid is prepared.

Description

Technical Field

[0001] The present invention relates to the technical field of basalt composite materials, and specifically relates to a basalt composite material, a preparation method thereof, and an application thereof. Background Art

[0002] Currently, more than 95% of inspection manholes in China are cast iron manholes, and a small amount are manholes made of other materials such as cement-based materials. Cement-based manholes have low costs, but have disadvantages such as being prone to fragmentation, having a short service life, and being inconvenient to open, so their applications are restricted. To solve the above pain points, the design of advanced composite material inspection manholes has been adopted. Utilizing their performance advantages, new composite material manholes have been widely used abroad. With the continuous innovation and application of new materials, advanced composite material manholes have gradually been applied and promoted.

[0003] Existing basalt composite materials have poor mechanical strength and impact resistance, and at the same time, the products have poor ultraviolet, acid, and alkali stability, which limits the use efficiency of the products. Based on this, the present invention further improves them. Summary of the Invention

[0004] Aiming at the defects of the existing technology, the purpose of the present invention is to provide a basalt composite material, a preparation method thereof, and an application thereof to solve the problems raised in the above background art.

[0005] The present invention solves the technical problems by adopting the following technical solutions: The present invention provides a preparation method of a basalt composite material, including the following steps:

[0006] Step 1: Uniformly blend 35 - 40 parts of thermosetting resin, 4 - 7 parts of coupling modifier, 5 - 8 parts of curing agent, and 3 - 5 parts of additive;

[0007] Step 2: Further blend 10 - 15 parts of basalt fibers with the product of Step 1 to obtain a basalt fiber premix;

[0008] Step 3: Feed the basalt fiber premix into a mold, and then perform molding pressing. After the molding pressing ends, demold to obtain the basalt composite material of the present invention.

[0009] Preferably, the thermosetting resin is one of epoxy resin, vinyl resin, and unsaturated polyester resin;

[0010] The curing agent is diacetone acrylamide;

[0011] The molding pressure for molding pressing is 10 - 15 MPa, and the molding pressing is performed for 30 - 35 minutes.

[0012] Preferably, the preparation method of the coupling modifier is:

[0013] S01: Add 4-7 parts of silane coupling agent KH560 to 8-12 parts of chitosan solution with a mass fraction of 5-7%, and then add 2-3 parts of nano silica sol and 1-3 parts of citric acid to fully mix to obtain a coupling blending solution;

[0014] S02: 5-8 parts of silicon carbide whiskers, 1-3 parts of flaky talc, 5-8 parts of dopamine hydrochloride solution and 2-4 parts of 5% by mass sodium alginate solution are mixed and ball-milled, the mixture is fully ball-milled, filtered and dried to obtain a whisker improver;

[0015] S03: The whisker modifier and the coupling blending solution are ultrasonically treated in a weight ratio of 2:5. After the ultrasonic treatment is completed, a coupling modifier is obtained.

[0016] The whisker structure of silicon carbide whiskers is combined with the flaky structure of talcum powder. Through the blending of the raw materials, the coupling modifier obtained can enhance the interface between the raw materials in the system, enhance the blending and coordination effect between the raw materials, and enhance the performance effect of the system.

[0017] Preferably, the mass fraction of the dopamine hydrochloride solution is 3-5%.

[0018] Preferably, the ball milling speed of the blending ball milling treatment is 1000-1500 r / min, and the ball milling is 2 hours; the ultrasonic power of the ultrasonic treatment is 350-400 W, and the ultrasonic time is 20-30 minutes.

[0019] Preferably, the preparation method of the additive is:

[0020] S11: placing the nano-titanium dioxide in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated nano-titanium dioxide after the irradiation is completed;

[0021] Add 3-5 parts of irradiated nano titanium dioxide, 1-3 parts of sodium lignin sulfonate solution and 2-4 parts of hydroxyapatite to 5-8 parts of lanthanum chloride solution and mix well to obtain nano titanium dioxide solution;

[0022] S12: The nano-bentonite agent and the nano-titanium dioxide liquid are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain an additive.

[0023] Preferably, the mass fraction of the sodium lignin sulfonate solution is 4-6%; the mass fraction of the lanthanum chloride solution is 2-5%.

[0024] Preferably, the preparation method of the nano bentonite agent is:

[0025] The nano-bentonite is calcined at 300-320°C for 20 minutes, then cooled to 150°C at a rate of 2-5°C / min, kept warm for 1 hour, and finally air-cooled to 55°C. It is then immersed in a sufficient amount of 5% sodium silicate solution and stirred evenly, then filtered and dried to obtain a nano-bentonite agent.

[0026] Through thermal improvement of lamellar nano-bentonite and optimization and improvement with sodium silicate solution, the performance stability of nano-bentonite is improved. At the same time, it is combined with nano-titanium dioxide liquid system to strengthen the performance effect of the system, thereby further improving the performance efficiency of the product.

[0027] The invention also provides a basalt composite material prepared by a method for preparing the basalt composite material.

[0028] A method for preparing a basalt composite material and its application in the preparation of manhole covers.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The advanced composite manhole cover of the present invention uses thermosetting resin as the matrix material and basalt fiber as the reinforcing material. Appropriate molding processes are adopted according to different load application scenarios to prepare new environmentally friendly manhole covers. At the same time, the coupling modifier and additive added to the composite material are coordinated and coordinated with each other to achieve synergistic effects. The product has excellent mechanical strength and impact resistance, and the product also has remarkable UV resistance and acid-base stability. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] A method for preparing a basalt composite material in this embodiment includes the following steps:

[0033] Step 1: Blend 35-40 parts of thermosetting resin, 4-7 parts of coupling modifier, 5-8 parts of curing agent and 3-5 parts of additive uniformly;

[0034] Step 2: Blending 10-15 parts of basalt fiber with the product of step 1 to obtain a basalt fiber premix;

[0035] Step 3: feeding the basalt fiber premix into a mold, and then subjecting it to molding treatment. After the molding is completed, demolding is performed to obtain the basalt composite material of the present invention.

[0036] The thermosetting resin in this embodiment is one of epoxy resin, vinyl resin, and unsaturated polyester resin;

[0037] The curing agent is diacetone acrylamide;

[0038] The molding pressure for molding treatment is 10 - 15 MPa, and the molding time is 30 - 35 min.

[0039] The preparation method of the coupling modifier in this embodiment is as follows:

[0040] S01: Add 4 - 7 parts of silane coupling agent KH560 to 8 - 12 parts of chitosan solution with a mass fraction of 5 - 7%, then add 2 - 3 parts of nano - silica sol and 1 - 3 parts of citric acid, and mix well to obtain a coupling blend;

[0041] S02: Blend 5 - 8 parts of silicon carbide whiskers, 1 - 3 parts of flaky talc powder, 5 - 8 parts of dopamine hydrochloride solution, and 2 - 4 parts of sodium alginate solution with a mass fraction of 5% for ball - milling treatment. After sufficient ball - milling, filter by suction and dry to obtain a whisker improver;

[0042] S03: Ultrasonically treat the whisker improver and the coupling blend according to a weight ratio of 2:5. After the ultrasonic treatment ends, obtain the coupling modifier.

[0043] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3 - 5%.

[0044] The ball - milling speed for the ball - milling treatment in this embodiment is 1000 - 1500 r / min, and the ball - milling time is 2 h; the ultrasonic power for the ultrasonic treatment is 350 - 400 W, and the ultrasonic time is 20 - 30 min.

[0045] The preparation method of the additive in this embodiment is as follows:

[0046] S11: Irradiate nano - titanium dioxide in a proton irradiation chamber for 10 - 15 min with an irradiation power of 350 - 400 W. After the irradiation ends, obtain irradiated nano - titanium dioxide;

[0047] Add 3 - 5 parts of irradiated nano - titanium dioxide, 1 - 3 parts of sodium lignosulfonate solution, and 2 - 4 parts of hydroxyapatite to 5 - 8 parts of lanthanum chloride solution and mix well to obtain a nano - titanium dioxide solution;

[0048] S12: Mix and ball - mill the nano - bentonite agent and the nano - titanium dioxide solution according to a weight ratio of 5:3. The ball - milling speed is 1500 r / min, and the ball - milling time is 2 h. After the ball - milling ends, wash with water, filter by suction, and dry to obtain the additive.

[0049] The mass fraction of the sodium lignosulfonate solution in this embodiment is 4 - 6%; the mass fraction of the lanthanum chloride solution is 2 - 5%.

[0050] The preparation method of the nano bentonite agent of this embodiment is:

[0051] The nano-bentonite is calcined at 300-320°C for 20 minutes, then cooled to 150°C at a rate of 2-5°C / min, kept warm for 1 hour, and finally air-cooled to 55°C. It is then immersed in a sufficient amount of 5% sodium silicate solution and stirred evenly, then filtered and dried to obtain a nano-bentonite agent.

[0052] The basalt composite material is prepared by a preparation method of a basalt composite material in this embodiment.

[0053] The present embodiment provides an application of a method for preparing a basalt composite material in the preparation of manhole covers.

[0054] Example 1.

[0055] A method for preparing a basalt composite material in this embodiment includes the following steps:

[0056] Step 1: Blend 35 parts of thermosetting resin, 4 parts of coupling modifier, 5 parts of curing agent and 3 parts of additive uniformly;

[0057] Step 2: Blending 10 parts of basalt fiber with the product of step 1 to obtain a basalt fiber premix;

[0058] Step 3: feeding the basalt fiber premix into a mold, and then subjecting it to molding treatment. After the molding is completed, demolding is performed to obtain the basalt composite material of the present invention.

[0059] The thermosetting resin in this embodiment is epoxy resin;

[0060] The curing agent is diacetone acrylamide;

[0061] The molding pressure of the molding process is 10MPa, and the molding time is 30min.

[0062] The preparation method of the coupling modifier of this embodiment is:

[0063] S01: 4 parts of silane coupling agent KH560 are added to 8 parts of 5% chitosan solution, and then 2 parts of nano silica sol and 1 part of citric acid are added and mixed to obtain a coupling solution;

[0064] S02: 5 parts of silicon carbide whiskers, 1 part of flaky talc, 5 parts of dopamine hydrochloride solution and 2 parts of 5% by mass sodium alginate solution are mixed and ball-milled, the mixture is fully ball-milled, filtered and dried to obtain a whisker improver;

[0065] S03: The whisker modifier and the coupling blending solution are ultrasonically treated in a weight ratio of 2:5. After the ultrasonic treatment is completed, a coupling modifier is obtained.

[0066] The mass fraction of the dopamine hydrochloride solution in this example is 3%.

[0067] In this example, the ball milling speed for the co - blending ball milling treatment is 1000 r / min, and the ball milling time is 2 h; the ultrasonic power for the ultrasonic treatment is 350 W, and the ultrasonic time is 20 min.

[0068] The preparation method of the additive in this example is as follows:

[0069] S11: Place the nano - titanium dioxide in a proton irradiation chamber for irradiation for 10 min with an irradiation power of 350 W. After the irradiation ends, the irradiated nano - titanium dioxide is obtained;

[0070] Add 3 parts of the irradiated nano - titanium dioxide, 1 part of the sodium lignosulfonate solution, and 2 parts of hydroxyapatite to 5 parts of the lanthanum chloride solution and mix well to obtain the nano - titanium dioxide solution;

[0071] S12: Mix and ball - mill the nano - bentonite agent and the nano - titanium dioxide solution according to a weight ratio of 5:3. The ball - milling speed is 1500 r / min, and the ball - milling time is 2 h. After the ball - milling ends, wash with water, filter by suction, and dry to obtain the additive.

[0072] The mass fraction of the sodium lignosulfonate solution in this example is 4%; the mass fraction of the lanthanum chloride solution is 2%.

[0073] The preparation method of the nano - bentonite agent in this example is as follows:

[0074] Calcine the nano - bentonite at 300 °C for 20 min, then cool it at a rate of 2 °C / min to 150 °C, keep it warm for 1 h, and finally air - cool it to 55 °C. Then immerse it in a sufficient amount of a 5% sodium silicate solution, stir evenly, filter by suction, and dry to obtain the nano - bentonite agent.

[0075] The basalt composite material prepared by the preparation method of a basalt composite material in this example.

[0076] The application of the preparation method of a basalt composite material in this example in the preparation of manhole covers.

[0077] Example 2.

[0078] The preparation method of a basalt composite material in this example includes the following steps:

[0079] Step 1: Blend 40 parts of thermosetting resin, 7 parts of coupling modifier, 8 parts of curing agent, and 5 parts of additive evenly;

[0080] Step 2: Blend 15 parts of basalt fiber with the product of Step 1 again to obtain a basalt fiber premix.

[0081] Step 3: Feed the basalt fiber premix into a mold, and then perform molding pressing. After the molding pressing is completed, demold to obtain the basalt composite material of the present invention.

[0082] The thermosetting resin in this embodiment is epoxy resin;

[0083] The curing agent is diacetone acrylamide;

[0084] The molding pressure for the molding pressing is 15 MPa, and the molding pressing is carried out for 35 minutes.

[0085] The preparation method of the coupling modifier in this embodiment is as follows:

[0086] S01: Add 7 parts of silane coupling agent KH560 to 12 parts of a 7% chitosan solution by mass, and then add 3 parts of nano-silica sol and 3 parts of citric acid and mix well to obtain a coupling blending liquid;

[0087] S02: Blend 8 parts of silicon carbide whiskers, 3 parts of flaky talc powder, 8 parts of dopamine hydrochloride solution, and 4 parts of a 5% sodium alginate solution by mass, perform ball milling treatment, ball mill sufficiently, filter by suction, and dry to obtain a whisker improver;

[0088] S03: Perform ultrasonic treatment on the whisker improver and the coupling blending liquid according to a weight ratio of 2:5. After the ultrasonic treatment is completed, obtain the coupling modifier.

[0089] The mass fraction of the dopamine hydrochloride solution in this embodiment is 5%.

[0090] The ball milling speed for the blending ball milling treatment in this embodiment is 1500 r / min, and the ball milling is carried out for 2 h; the ultrasonic power for the ultrasonic treatment is 400 W, and the ultrasonic time is 30 min.

[0091] The preparation method of the additive in this embodiment is as follows:

[0092] S11: Place nano-titanium dioxide in a proton irradiation chamber and irradiate for 15 minutes with an irradiation power of 400 W. After the irradiation is completed, obtain irradiated nano-titanium dioxide;

[0093] Add 5 parts of irradiated nano-titanium dioxide, 3 parts of sodium lignosulfonate solution, and 4 parts of hydroxyapatite to 8 parts of lanthanum chloride solution and mix well to obtain a nano-titanium dioxide solution;

[0094] S12: Blend the nano-bentonite agent and the nano-titanium dioxide solution according to a weight ratio of 5:3, perform ball milling treatment, with a ball milling speed of 1500 r / min and a ball milling time of 2 h. After the ball milling is completed, wash with water, filter by suction, and dry to obtain the additive.

[0095] The mass fraction of the sodium lignosulfonate solution in this embodiment is 6%; the mass fraction of the lanthanum chloride solution is 5%.

[0096] The preparation method of the nano bentonite agent of this embodiment is:

[0097] The nano-bentonite was calcined at 320°C for 20 min, then cooled to 150°C at a rate of 5°C / min, kept warm for 1 h, and finally air-cooled to 55°C. The nano-bentonite was then immersed in a sufficient amount of 5% sodium silicate solution and stirred evenly. The nano-bentonite was then filtered and dried to obtain a nano-bentonite agent.

[0098] The basalt composite material is prepared by a preparation method of a basalt composite material in this embodiment.

[0099] The present embodiment provides an application of a method for preparing a basalt composite material in the preparation of manhole covers.

[0100] Example 3.

[0101] A method for preparing a basalt composite material in this embodiment includes the following steps:

[0102] Step 1: 37.5 parts of thermosetting resin, 5.5 parts of coupling modifier, 6.5 parts of curing agent and 4 parts of additive are mixed evenly;

[0103] Step 2: 12.5 parts of basalt fiber and the product of step 1 are blended again to obtain a basalt fiber premix;

[0104] Step 3: feeding the basalt fiber premix into a mold, and then subjecting it to molding treatment. After the molding is completed, demolding is performed to obtain the basalt composite material of the present invention.

[0105] The thermosetting resin in this embodiment is epoxy resin;

[0106] The curing agent is diacetone acrylamide;

[0107] The molding pressure of the molding process is 12.5 MPa, and the molding time is 32.5 min.

[0108] The preparation method of the coupling modifier of this embodiment is:

[0109] S01: 5.5 parts of silane coupling agent KH560 are added to 10 parts of 6% chitosan solution by mass, and then 2.5 parts of nano silica sol and 2 parts of citric acid are added and mixed to obtain a coupling solution;

[0110] S02: 6.5 parts of silicon carbide whiskers, 2 parts of flaky talc, 6.5 parts of dopamine hydrochloride solution and 3 parts of 5% by mass sodium alginate solution are mixed and ball-milled, the mixture is fully ball-milled, filtered and dried to obtain a whisker improver;

[0111] S03: The whisker modifier and the coupling blending solution are ultrasonically treated in a weight ratio of 2:5. After the ultrasonic treatment is completed, a coupling modifier is obtained.

[0112] The mass fraction of the dopamine hydrochloride solution in this example is 4%.

[0113] In this example, the ball milling speed for the co - blending ball milling treatment is 1250 r / min, and the ball milling time is 2 h; the ultrasonic power for the ultrasonic treatment is 370 W, and the ultrasonic time is 25 min.

[0114] The preparation method of the additive in this example is as follows:

[0115] S11: Place the nano - titanium dioxide in a proton irradiation chamber for irradiation for 12.5 min with an irradiation power of 375 W. After the irradiation ends, the irradiated nano - titanium dioxide is obtained;

[0116] Add 4 parts of the irradiated nano - titanium dioxide, 2 parts of the sodium lignosulfonate solution, and 3 parts of hydroxyapatite to 6.5 parts of the lanthanum chloride solution and mix well to obtain the nano - titanium dioxide solution;

[0117] S12: Mix the nano - bentonite agent and the nano - titanium dioxide solution in a weight ratio of 5:3 and perform ball milling treatment. The ball milling speed is 1500 r / min, and the ball milling time is 2 h. After the ball milling ends, wash with water, filter by suction, and dry to obtain the additive.

[0118] The mass fraction of the sodium lignosulfonate solution in this example is 5%; the mass fraction of the lanthanum chloride solution is 3.5%.

[0119] The preparation method of the nano - bentonite agent in this example is as follows:

[0120] Calcine the nano - bentonite at 310 °C for 20 min, then cool it at a rate of 3.5 °C / min to 150 °C, keep it warm for 1 h, and finally air - cool it to 55 °C. Then immerse it in a sufficient amount of sodium silicate solution with a mass fraction of 5% and stir evenly, then filter by suction and dry to obtain the nano - bentonite agent.

[0121] The basalt composite material prepared by the preparation method of a basalt composite material in this example.

[0122] The application of the preparation method of a basalt composite material in this example in the preparation of manhole covers.

[0123] Example 4.

[0124] The preparation method of a basalt composite material in this example includes the following steps:

[0125] Step 1: Blend 36 parts of thermosetting resin, 5 parts of coupling modifier, 6 parts of curing agent, and 4 parts of additive evenly;

[0126] Step 2: Blend 12 parts of basalt fiber with the product of Step 1 again to obtain a basalt fiber premix.

[0127] Step 3: Feed the basalt fiber premix into a mold, then perform compression molding. After the compression molding is completed, demold to obtain the basalt composite material of the present invention.

[0128] The thermosetting resin in this example is epoxy resin;

[0129] The curing agent is diacetone acrylamide;

[0130] The compression molding pressure for the compression molding treatment is 12 MPa, and the compression molding is carried out for 32 min.

[0131] The preparation method of the coupling modifier in this example is as follows:

[0132] S01: Add 5 parts of silane coupling agent KH560 to 9 parts of a 6% chitosan solution by mass, then add 3 parts of nano-silica sol and 2 parts of citric acid and blend thoroughly to obtain a coupling blending liquid;

[0133] S02: Blend 6 parts of silicon carbide whiskers, 2 parts of flaky talc powder, 6 parts of dopamine hydrochloride solution and 3 parts of a 5% sodium alginate solution by mass and perform ball milling treatment. After sufficient ball milling, filter by suction and dry to obtain a whisker improver;

[0134] S03: Ultrasonically treat the whisker improver and the coupling blending liquid according to a weight ratio of 2:5. After the ultrasonic treatment is completed, obtain the coupling modifier.

[0135] The mass fraction of the dopamine hydrochloride solution in this example is 4%.

[0136] The ball milling speed for the blending ball milling treatment in this example is 1200 r / min, and the ball milling is carried out for 2 h; the ultrasonic power for the ultrasonic treatment is 360 W, and the ultrasonic time is 28 min.

[0137] The preparation method of the additive in this example is as follows:

[0138] S11: Place nano-titanium dioxide in a proton irradiation chamber and irradiate for 12 min with an irradiation power of 360 W. After the irradiation is completed, obtain irradiated nano-titanium dioxide;

[0139] Add 4 parts of irradiated nano-titanium dioxide, 2 parts of sodium lignosulfonate solution and 3 parts of hydroxyapatite to 6 parts of lanthanum chloride solution and mix thoroughly to obtain a nano-titanium dioxide solution;

[0140] S12: Blend and ball mill the nano-bentonite agent and the nano-titanium dioxide solution according to a weight ratio of 5:3. The ball milling speed is 1500 r / min, and the ball milling is carried out for 2 h. After the ball milling is completed, wash with water, filter by suction and dry to obtain the additive.

[0141] The mass fraction of the sodium lignosulfonate solution in this example is 5%; the mass fraction of the lanthanum chloride solution is 3%.

[0142] The preparation method of the nano-bentonite agent in this embodiment is as follows:

[0143] Calcine the nano-bentonite at 310 °C for 20 min, then cool it to 150 °C at a rate of 3 °C / min, keep it warm for 1 h, and finally air-cool it to 55 °C. Then immerse it in a sufficient amount of sodium silicate solution with a mass fraction of 5%, stir evenly, filter and dry to obtain the nano-bentonite agent.

[0144] The basalt composite material prepared by the preparation method of a basalt composite material in this embodiment.

[0145] The application of the preparation method of a basalt composite material in this embodiment in the preparation of manhole covers.

[0146] Comparative Example 1.

[0147] The difference from Example 3 is that no coupling modifier is added.

[0148] Comparative Example 2.

[0149] The difference from Example 3 is that no whisker improver is added in the preparation of the coupling modifier.

[0150] Comparative Example 3.

[0151] The difference from Example 3 is that the whisker improver is replaced with silicon carbide whiskers.

[0152] Comparative Example 4.

[0153] The difference from Example 3 is that no silane coupling agent KH560 and nano-silica sol are added in the preparation of the coupling modifier.

[0154] Comparative Example 5.

[0155] The difference from Example 3 is that no additive is added.

[0156] Comparative Example 6.

[0157] The difference from Example 3 is that no nano-titanium dioxide liquid is added to the additive.

[0158] Comparative Example 7.

[0159] The difference from Example 3 is that no irradiated nano-titanium dioxide is added in the preparation of the nano-titanium dioxide liquid.

[0160] Comparative Example 8.

[0161] The difference from Example 3 is that no nano-bentonite agent is added to the additive.

[0162] Test the product performances of Examples 1-4 and Comparative Examples 1-8 of the present invention, and the test results are as follows.

[0163]

[0164]

[0165]

[0166] It can be seen from Examples 1-4 and Comparative Examples 1-8 that the products of Examples 1-4 of the present invention have excellent acid and alkali resistance and UV stability; when one of the coupling modifiers and additives is not added to the products, the acid and alkali resistance and UV stability of the products show an obvious trend of deterioration. When the two are used in coordination, the performance of the products is the most significant;

[0167] When the whisker improver is not added in the preparation of the coupling modifier, the silicon carbide whisker is used instead of the whisker improver, the silane coupling agent KH560 and nano-silica sol are not added in the preparation of the coupling modifier, the nano-titanium dioxide liquid is not added in the additive, the irradiated nano-titanium dioxide is not added in the preparation of the nano-titanium dioxide liquid, and the nano-bentonite agent is not added in the additive, the performance of the products all shows a trend of deterioration. Only when the product raw materials obtained by the method of the present invention are used, the performance effect of the products is the most significant, and the use of other methods instead is not as obvious as the effect of the present invention.

[0168] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0169] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a basalt composite material, characterized in that: The following steps are involved: Step 1: Blend 35-40 parts of thermosetting resin, 4-7 parts of coupling modifier, 5-8 parts of curing agent and 3-5 parts of additive uniformly; Step 2: Blending 10-15 parts of basalt fiber with the product of step 1 to obtain a basalt fiber premix; Step 3: feeding the basalt fiber premix into a mold, and then subjecting it to molding treatment. After the molding is completed, demolding is performed to obtain the basalt composite material of the present invention.

2. The method for preparing a basalt composite material according to claim 1, characterized in that: The thermosetting resin is one of epoxy resin, vinyl resin and unsaturated polyester resin; The curing agent is diacetone acrylamide; The molding pressure of the molding process is 10-15MPa, and the molding time is 30-35min.

3. The method for preparing a basalt composite material according to claim 2, characterized in that: The preparation method of the coupling modifier is: S01: Add 4-7 parts of silane coupling agent KH560 to 8-12 parts of chitosan solution with a mass fraction of 5-7%, and then add 2-3 parts of nano silica sol and 1-3 parts of citric acid to fully mix to obtain a coupling blending solution; S02: 5-8 parts of silicon carbide whiskers, 1-3 parts of flaky talc, 5-8 parts of dopamine hydrochloride solution and 2-4 parts of 5% by mass sodium alginate solution are mixed and ball-milled, the mixture is fully ball-milled, filtered and dried to obtain a whisker improver; S03: The whisker modifier and the coupling blending solution are ultrasonically treated in a weight ratio of 2:

5. After the ultrasonic treatment is completed, a coupling modifier is obtained.

4. The method for preparing a basalt composite material according to claim 3, characterized in that: The mass fraction of the dopamine hydrochloride solution is 3-5%.

5. The method for preparing a basalt composite material according to claim 3, characterized in that: The ball milling speed of the blended ball milling treatment is 1000-1500 r / min, and the ball milling is 2 hours; the ultrasonic power of the ultrasonic treatment is 350-400 W, and the ultrasonic time is 20-30 minutes.

6. The method for preparing a basalt composite material according to claim 1, characterized in that: The preparation method of the additive is: S11: placing the nano-titanium dioxide in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated nano-titanium dioxide after the irradiation is completed; Add 3-5 parts of irradiated nano titanium dioxide, 1-3 parts of sodium lignin sulfonate solution and 2-4 parts of hydroxyapatite to 5-8 parts of lanthanum chloride solution and mix well to obtain nano titanium dioxide solution; S12: The nano-bentonite agent and the nano-titanium dioxide liquid are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain an additive.

7. The method for preparing a basalt composite material according to claim 6, characterized in that: The mass fraction of the sodium lignin sulfonate solution is 4-6%; the mass fraction of the lanthanum chloride solution is 2-5%.

8. The method for preparing a basalt composite material according to claim 6, characterized in that: The preparation method of the nano bentonite agent is: The nano-bentonite is calcined at 300-320°C for 20 minutes, then cooled to 150°C at a rate of 2-5°C / min, kept warm for 1 hour, and finally air-cooled to 55°C. It is then immersed in a sufficient amount of 5% sodium silicate solution and stirred evenly, then filtered and dried to obtain a nano-bentonite agent.

9. A basalt composite material prepared by the method for preparing a basalt composite material according to any one of claims 1 to 8.

10. Use of the preparation method of the basalt composite material according to any one of claims 1 to 8 in the preparation of manhole covers.

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