Wear-resistant glass fiber reinforced plastic and preparation method thereof

Abstract

The present invention relates to the technical field of glass fiber reinforced plastic preparation, and in particular to wear-resistant glass fiber reinforced plastic and a preparation method thereof, wherein the wear-resistant glass fiber reinforced plastic comprises a fiber resin mixed layer and a wear-resistant layer arranged on the surface of the fiber resin mixed layer; the wear-resistant additive is a core-shell structure; the core of the wear-resistant additive is silicon carbide, and the outer shell is aluminum oxide; the core accounts for 50% of the mass of the wear-resistant additive, and the outer shell accounts for 50% of the mass of the wear-resistant additive. The wear-resistant layer is coated on the surface of the fiber resin mixed layer to achieve the wear resistance of the glass fiber reinforced plastic; secondly, silicon carbide is selected as the basic wear-resistant material, which has excellent wear resistance; furthermore, aluminum oxide is coated on the surface of the silicon carbide to form a core-shell structure, which solves the problem of poor wettability of the silicon carbide material and poor bonding with unsaturated polyester resin. At the same time, aluminum oxide also has good wear resistance, further enhancing the overall wear resistance of the glass fiber reinforced plastic.

Description

Technical Field

[0001] The present invention relates to the technical field of glass fiber reinforced plastic preparation, in particular to wear-resistant glass fiber reinforced plastic and a preparation method thereof. Background Art

[0002] FRP, or fiber-reinforced plastic, generally refers to a plastic made from an unsaturated polyester, epoxy, or phenolic resin matrix, reinforced with glass fiber or its products. FRP is widely used in various industrial fields due to its advantages such as light weight, rigidity, non-conductivity, high mechanical strength, minimal recycling, and corrosion resistance.

[0003] However, when glass fiber is added as a reinforcing material, due to its poor wettability, it has poor bonding with the unsaturated polyester resin. After bonding, gaps are easily formed between the glass fiber and the unsaturated resin, resulting in poor tissue density, which in turn causes a lack of wear resistance. Summary of the Invention

[0004] The present invention aims to overcome the deficiencies of the prior art and provides wear-resistant glass fiber reinforced plastic and a preparation method thereof.

[0005] The present invention solves the above technical problems through the following technical means:

[0006] Wear-resistant fiberglass reinforced plastics, comprising a fiber-resin mixed layer and a wear-resistant layer arranged on the surface of the fiber-resin mixed layer;

[0007] The fiber resin mixed layer comprises the following raw materials in parts by weight:

[0008] 100 parts of unsaturated polyester resin;

[0009] 30 parts of reinforcing fiber;

[0010] 2 parts of curing agent;

[0011] 0.15 parts of accelerator;

[0012] 0.2 parts of polymerization inhibitor;

[0013] 0.3 parts of defoaming agent;

[0014] The wear-resistant layer comprises the following raw materials in parts by weight:

[0015] 100 parts of unsaturated polyester resin;

[0016] 20 parts of wear-resistant additive;

[0017] 2 parts of curing agent;

[0018] 0.15 parts of accelerator;

[0019] 0.2 parts of polymerization inhibitor;

[0020] 0.3 parts of defoaming agent.

[0021] By adopting the above technical solution, the fiber-resin mixed layer serves as the base layer of the FRP, providing the basic performance of the FRP. The surface of the fiber-resin mixed layer is covered with a wear-resistant layer, and a wear-resistant additive is added to the wear-resistant layer to achieve the purpose of improving the wear resistance of the FRP. At the same time, since the wear-resistant layer also uses unsaturated polyester resin as the base material, while ensuring the bonding strength with the fiber-resin mixed layer, a multi-layer structure is formed to improve the overall strength of the FRP.

[0022] As an improvement of the above technology, the wear-resistant fiberglass and the wear-resistant additive are of core-shell structure; the core of the wear-resistant additive is silicon carbide and the shell is aluminum oxide; the core accounts for 50% of the mass of the wear-resistant additive and the shell accounts for 50% of the mass of the wear-resistant additive.

[0023] By adopting the above technical solution, silicon carbide is used as the basic wear-resistant material with good wear resistance. Silicon carbide is coated with aluminum oxide to form a core-shell structure, which solves the problem of extremely poor wettability of silicon carbide material and poor tuberculosis with unsaturated polyester resin. At the same time, aluminum oxide is used as a coating material, which also has good wear resistance, further ensuring the wear resistance.

[0024] As an improvement of the above technical solution, the wear-resistant fiberglass, the silicon carbide is micron-sized silicon carbide powder, and the aluminum oxide is nano-sized aluminum oxide powder.

[0025] By adopting the above technical solution, aluminum oxide can be well coated on the surface of silicon carbide.

[0026] As an improvement of the above technical solution, the wear-resistant glass fiber reinforced plastic and the wear-resistant additive are prepared by the following steps:

[0027] S1, prepare a hydrochloric acid solution with a pH value of 5, add silicon carbide powder, and ultrasonically disperse for 1 hour to obtain a dispersion, and then heat to 65°C;

[0028] S2, take aluminum chloride and prepare a 0.2 mol / L solution;

[0029] S3, adding the solution prepared in step S2 to the dispersion in step S1 and stirring;

[0030] S4, centrifuging the raw material after the treatment in step S3, dissolving the precipitate in alcohol, ultrasonically dispersing it, and then drying it. After drying, heat-treating it at 550° C. for 2 hours to obtain the product.

[0031] By adopting the above technical solution, ultrasonic dispersion treatment is used in the entire preparation process to break up the agglomerated nano-alumina particles with the energy of ultrasound, thereby solving the problem of easy agglomeration of nano-alumina, reducing raw material precipitation, improving raw material dispersibility, and ensuring that alumina is evenly coated on the silicon carbide surface.

[0032] As an improvement of the above technical solution, the preparation method of the wear-resistant glass fiber reinforced plastic and the wear-resistant additive further comprises:

[0033] S5, taking a silane coupling agent and adding it to an appropriate amount of ethanol, then adding a hydrochloric acid solution to adjust the pH value to 4, and letting it stand for 1 hour, then adding the wear-resistant additive prepared in step S4, heating it in a water bath to 45°C and coupling treating it for 6 hours, and then washing it with toluene, and vacuum drying it after washing.

[0034] By adopting the above technical solution: using silane coupling agent to modify the aluminum oxide coated on the surface of silicon carbide, the problem of easy agglomeration and precipitation of the wear-resistant additive due to the outer shell of the wear-resistant additive being coated with aluminum oxide is solved, and the uniformity of dispersion of the wear-resistant additive in the wear-resistant layer is improved.

[0035] The preparation method of the wear-resistant glass fiber reinforced plastic comprises the following steps:

[0036] S1, preparing a fiber-resin mixed layer, uniformly mixing the raw materials of the fiber-resin mixed layer except the reinforcing fibers, pouring the mixture into a mold to form a resin layer; after forming, uniformly laying the reinforcing fibers on one or both sides of the resin layer, removing bubbles, and curing the mixture at 80° C. for 30 minutes to obtain a fiber-resin mixed layer;

[0037] S2, mixing the raw materials of the wear-resistant layer evenly, and then evenly coating it on the surface of the fiber-resin mixed layer, and curing it at 80°C for 20 minutes to obtain the wear-resistant fiberglass reinforced plastic.

[0038] By adopting the above technical solution, glass fiber reinforced plastic with excellent wear resistance is obtained.

[0039] The advantages of the present invention are: firstly, a wear-resistant layer is coated on the surface of the fiber-resin mixed layer to achieve the wear-resistant performance of the glass fiber reinforced plastic;

[0040] Secondly, silicon carbide is selected as the basic wear-resistant material, which has excellent wear resistance;

[0041] Furthermore, alumina is coated on the surface of silicon carbide to form a core-shell structure, which solves the problem of poor wettability of silicon carbide material and poor bonding with unsaturated polyester resin. At the same time, alumina also has good wear resistance, further enhancing the overall wear resistance of FRP.

[0042] In addition, the aluminum oxide coated on the surface of silicon carbide is modified by using a silane coupling agent to solve the problem that the wear-resistant additive is easy to agglomerate and precipitate due to the coated aluminum oxide shell of the wear-resistant additive, and to improve the uniformity of the dispersion of the wear-resistant additive in the wear-resistant layer;

[0043] Finally, the wear-resistant layer uses unsaturated polyester resin as the base material and has good bonding with the fiber resin mixed layer, and the formed multi-layer structure improves the overall strength of the fiberglass reinforced plastics. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 The composition and content of FRP.

[0045] Figure 2 The results of wear resistance test. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] Example 1, a wear-resistant glass fiber reinforced plastic, comprising a fiber-resin mixed layer and a wear-resistant layer disposed on the surface of the fiber-resin mixed layer, is prepared by the following steps:

[0048] S1, preparing a fiber-resin mixed layer, uniformly mixing the raw materials of the fiber-resin mixed layer except the reinforcing fibers, pouring the mixture into a mold to form a resin layer; after forming, uniformly laying the reinforcing fibers on one or both sides of the resin layer, removing bubbles, and curing the mixture at 80° C. for 30 minutes to obtain a fiber-resin mixed layer with a thickness of 0.8 mm;

[0049] S2, mix the raw materials of the wear-resistant layer evenly, and then evenly apply it on the surface of the fiber-resin mixed layer with a coating thickness of 0.2 mm, and cure it at 80°C for 20 minutes to obtain wear-resistant fiberglass reinforced plastics.

[0050] The wear-resistant additive in the wear-resistant layer is a core-shell structure of aluminum oxide coated silicon carbide, and the wear-resistant additive is prepared by the following steps:

[0051] S1, prepare a hydrochloric acid solution with a pH value of 5, add silicon carbide powder, and ultrasonically disperse for 1 hour to obtain a dispersion, and then heat to 65°C;

[0052] S2, take aluminum chloride and prepare a 0.2 mol / L solution;

[0053] S3, adding the solution prepared in step S2 to the dispersion in step S1 and stirring;

[0054] S4, centrifuging the raw material after the treatment in step S3, dissolving the precipitate in alcohol, ultrasonically dispersing it, and then drying it. After drying, heat treating it at 550° C. for 2 hours;

[0055] S5, taking a silane coupling agent and adding it to an appropriate amount of ethanol, then adding a hydrochloric acid solution to adjust the pH value to 4, and letting it stand for 1 hour, then adding the wear-resistant additive prepared in step S4, heating it in a water bath to 45°C and coupling treating it for 6 hours, and then washing it with toluene, and vacuum drying it after washing.

[0056] Example 2: This example differs from Example 1 in that the thickness of the fiber-resin mixed layer is 4 mm, and the thickness of the coated wear-resistant layer is 0.5 mm.

[0057] Example 3: This example differs from Example 1 in that the thickness of the fiber-resin mixed layer is 8 mm, and the thickness of the coated wear-resistant layer is 0.8 mm.

[0058] Comparative Example 1 is different from Example 1 in that the wear-resistant additive is silicon carbide.

[0059] Comparative Example 2 is different from Example 1 in that the wear-resistant additive is prepared by the following steps:

[0060] S1, prepare a hydrochloric acid solution with a pH value of 5, add silicon carbide powder, mechanically stir for 1 hour to obtain a dispersion, and then heat to 65°C;

[0061] S2, take aluminum chloride and prepare a 0.2 mol / L solution;

[0062] S3, adding the solution prepared in step S2 to the dispersion in step S1 and stirring;

[0063] S4, centrifuging the raw material after the treatment in step S3, dissolving the precipitate in alcohol, drying, and heat treating at 550° C. for 2 hours;

[0064] S5, taking a silane coupling agent and adding it to an appropriate amount of ethanol, then adding a hydrochloric acid solution to adjust the pH value to 4, and letting it stand for 1 hour, then adding the wear-resistant additive prepared in step S4, heating it in a water bath to 45°C and coupling treating it for 6 hours, and then washing it with toluene, and vacuum drying it after washing.

[0065] Comparative Example 3 is different from Example 1 in that the wear-resistant additive is prepared by the following steps:

[0066] S1, prepare a hydrochloric acid solution with a pH value of 5, add silicon carbide powder, and ultrasonically disperse for 1 hour to obtain a dispersion, and then heat to 65°C;

[0067] S2, take aluminum chloride and prepare a 0.2 mol / L solution;

[0068] S3, adding the solution prepared in step S2 to the dispersion in step S1 and stirring;

[0069] S4, centrifuging the raw material after the treatment in step S3, dissolving the precipitate in alcohol, ultrasonically dispersing it, and then drying it. After drying, heat-treating it at 550° C. for 2 hours to obtain the product.

[0070] In the above examples and comparative examples, the components and contents of glass fiber reinforced plastics refer to Figure 1 .

[0071] Figure 2 Record the wear resistance test results.

[0072] Wear resistance test:

[0073] A 20 mm × 20 mm sample was tested on an HT-1000 high temperature friction and wear testing machine under the conditions of a load of 1000 g and a rotation speed of 5600 r / min. The mass loss was recorded and the mass loss percentage was calculated.

[0074] Data analysis: Figure 2 It can be seen that compared with comparative examples 1-3, embodiments 1-3 all exhibit higher wear resistance, wherein the wear resistance of the comparative examples from poor to good is comparative example 1, comparative example 3, and comparative example 2.

[0075] Compared to Comparative Example 1, the wear-resistant additive added in Comparative Example 3 is a core-shell structured aluminum oxide-coated silicon carbide material, which improves wear resistance. Compared to Comparative Example 3, the wear-resistant additive in Comparative Example 2 is modified to improve wear resistance. The wear-resistant additives added in Examples 1-3 are aluminum oxide-coated silicon carbide materials. At the same time, the wear-resistant additives are prepared in conjunction with ultrasonic treatment and surface modification after preparation, which improves the wear resistance of the fiberglass surface.

[0076] It should be noted that, in this document, if there are relational terms such as first and second, etc., they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Wear-resistant fiberglass, characterized by: It comprises a fiber-resin mixed layer and a wear-resistant layer arranged on the surface of the fiber-resin mixed layer; The fiber resin mixed layer comprises the following raw materials in parts by weight: 100 parts of unsaturated polyester resin; 30 parts of reinforcing fiber; 2 parts of curing agent; 0.15 parts of accelerator; 0.2 parts of polymerization inhibitor; 0.3 parts of defoaming agent; The wear-resistant layer comprises the following raw materials in parts by weight: 100 parts of unsaturated polyester resin; 20 parts of wear-resistant additive; 2 parts of curing agent; 0.15 parts of accelerator; 0.2 parts of polymerization inhibitor; 0.3 parts of defoaming agent; The wear-resistant additive has a core-shell structure; the core of the wear-resistant additive is silicon carbide and the shell is aluminum oxide; the core accounts for 50% of the mass of the wear-resistant additive, and the shell accounts for 50% of the mass of the wear-resistant additive; The silicon carbide is micron-sized silicon carbide powder, and the aluminum oxide is nano-sized aluminum oxide powder; The wear-resistant additive The method comprises the following steps: S1, prepare a hydrochloric acid solution with a pH value of 5, add silicon carbide powder, and ultrasonically disperse for 1 hour to obtain a dispersion, and then heat to 65°C; S2, take aluminum chloride and prepare a 0.2 mol / L solution; S3, adding the solution prepared in step S2 to the dispersion in step S1 and stirring; S4, centrifuging the raw material after the treatment in step S3, dissolving the precipitate in alcohol, ultrasonically dispersing it, and then drying it. After drying, heat-treating it at 550° C. for 2 hours to obtain the product; The preparation method of the wear-resistant additive further comprises: S5, taking a silane coupling agent and adding it to an appropriate amount of ethanol, then adding a hydrochloric acid solution to adjust the pH value to 4, and letting it stand for 1 hour, then adding the wear-resistant additive prepared in step S4, heating it in a water bath to 45°C and coupling treating it for 6 hours, and then washing it with toluene, and vacuum drying it after washing.

2. A method for preparing wear-resistant glass fiber reinforced plastic according to claim 1, characterized in that: The following steps are involved: S1, preparing a fiber-resin mixed layer, uniformly mixing the raw materials of the fiber-resin mixed layer except the reinforcing fibers, pouring the mixture into a mold to form a resin layer; after forming, uniformly laying the reinforcing fibers on one or both sides of the resin layer, removing bubbles, and curing the mixture at 80° C. for 30 minutes to obtain a fiber-resin mixed layer; S2, mixing the raw materials of the wear-resistant layer evenly, and then evenly coating it on the surface of the fiber-resin mixed layer, and curing it at 80°C for 20 minutes to obtain the wear-resistant fiberglass reinforced plastic.

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