Composite material for maintaining basalt fiber golden appearance and preparation method and application thereof

Abstract

The application relates to the technical field of composite materials, in particular to a composite material capable of keeping the golden appearance of basalt fibers, a preparation method and application thereof. The composite material provided by the application can keep the golden appearance of basalt fibers for a long time and is favorable for the popularization and application of basalt fibers in the fields of automobile interior parts and bags, because the transparent thermoplastic material contained in the composite material can improve the discoloration problem. In addition, the thermoplastic material is added to improve the problems of poor discoloration and poor composite strength, and the process conditions are controlled in the preparation process to improve the discoloration problem, so that the finally-prepared composite material has good durability and does not discolor for a long time. The composite material also has the advantages of environmental protection in the preparation process and simple preparation method.

Description

Technical Field

[0001] This application relates to the field of composite material technology, specifically to a composite material that maintains the golden appearance of basalt fibers, its preparation method, and its application. Background Technology

[0002] Basalt fiber is a continuous fiber made by melting natural basalt rock at 1450℃~1500℃ and then drawing it at high speed through a platinum-rhodium alloy spinneret. Basalt continuous fiber not only boasts high strength but also possesses excellent properties such as electrical insulation, corrosion resistance, and high-temperature resistance. It is a novel inorganic, environmentally friendly, and high-performance fiber material with broad application prospects. The color of basalt fiber is generally a golden-brown with a good golden luster. For many applications with aesthetic requirements, such as automotive interior and exterior parts, shoe materials, and bags, retaining the golden appearance of basalt fiber as a selling point gives it significant commercial value.

[0003] During processing, basalt fiber often needs to be compounded with polymer materials, such as resins, to improve its functionality and applicability and facilitate molding. However, when basalt fiber is compounded with resin, it often fails to retain its original color, leading to a decrease in its commercial value. Analysis reveals two main reasons for this: firstly, the color produced during processing is masked; secondly, discoloration occurs due to the infiltration of organic resins and other substances.

[0004] Existing research has proposed solutions to this problem and achieved some success. For example, patent CN202311512469A discloses a water-based anti-discoloration coating for basalt fiber, its preparation method, and basalt fiber products. This method effectively solves the discoloration problem caused by polyurethane resin impregnation of basalt fiber by applying a polyurethane coating to the surface of the basalt fiber material. While this method solves the color retention problem of basalt fiber, its surface treatment process is not environmentally friendly, has high processing costs, and is not applicable to different resin systems. Long-term use may still result in fading, thus limiting the application and promotion of basalt fiber. Summary of the Invention

[0005] This application provides a composite material that retains the golden appearance of basalt fibers, its preparation method, and its application, in order to solve the problem that the golden appearance of basalt fibers cannot be well preserved when applied in related technologies.

[0006] In a first aspect, a composite material that maintains the golden appearance of basalt fibers is provided, comprising:

[0007] A basalt gold-colored outer layer, comprising basalt fibers and a thermoplastic film, wherein the polymer composite film layer is disposed on the surface of the basalt fibers;

[0008] An adhesive medium layer, one side of which is bonded to the surface of the basalt gold-colored outer layer by an adhesive.

[0009] Furthermore, the thickness of the basalt gold outer layer is 0.2-1mm; the thickness can be adjusted as needed.

[0010] Furthermore, the thickness of the adhesive medium layer is 0.05-0.2 mm; the thickness of the adhesive medium layer can be adjusted according to actual needs.

[0011] Furthermore, the thermoplastic film includes at least one of PE, PP, PET, PC, and TPU; such materials are colorless and transparent, which helps to reduce the obscuring of the color of basalt itself.

[0012] Furthermore, the thickness of the thermoplastic film is 0.05-0.2 mm; the thickness of the thermoplastic film can be adjusted as needed.

[0013] Furthermore, the thermoplastic film also includes nano-silica aerogel and silicone oil;

[0014] Nano-silica aerogel has a unique porous structure. Its porous structure and high specific surface area can become an obstacle to the movement of resin molecular chains, affecting the arrangement and stacking process of resin molecular chains, which helps to reduce the discoloration of thermoplastic materials and the obscuring of basalt color after discoloration.

[0015] Silicone oil can improve the fluidity and flexibility of resins, and can also improve the processability of resins by changing their viscosity. It can improve the viscosity of thermoplastic materials, thereby enhancing the composite strength of thermoplastic materials and adhesive media, and improving the mechanical properties of the prepared composite materials.

[0016] The addition of silicone oil can also enhance the gloss and transparency of the prepared composite material, as well as improve the feel of the composite material.

[0017] Furthermore, the silicone oil is a modified silicone oil, including at least one of amino-modified silicone oil, epoxy-modified silicone oil, or polyether-modified silicone oil.

[0018] The modified silicone oils mentioned above have special functional groups and strong activity, which can better adjust the viscosity of thermoplastic materials, control the flowability of thermoplastic materials after hot pressing, and better improve the viscosity and processing performance of thermoplastic materials.

[0019] Furthermore, the adhesive medium layer is a non-woven fabric or fiber felt;

[0020] Optionally, the nonwoven fabric can be PP or PET nonwoven fabric, and the fiber mat can be glass fiber mat or aramid fiber mat; other nonwoven fabrics or fiber mats or other materials can also be selected according to performance and functional requirements.

[0021] Further, the adhesive is a resin; optionally, the resin can be a thermosetting resin or a thermoplastic resin.

[0022] Furthermore, the thermosetting resin is selected from at least one of epoxy resin, polyurethane, and unsaturated resin.

[0023] Furthermore, the thermoplastic resin is selected from at least one of PP, PA, PC, and PET.

[0024] Secondly, the present invention provides a composite material comprising the aforementioned gold-colored composite material and a body material, wherein the gold-colored composite material is disposed on the surface of the body material.

[0025] Furthermore, the gold-colored composite material is disposed on the surface of the body material through the adhesive medium layer.

[0026] Furthermore, the body material is a thermoplastic material or a thermosetting material.

[0027] Furthermore, when the base material is a thermosetting material, the composite material further includes a hot melt adhesive; optionally, the hot melt adhesive is a hot melt adhesive film or a hot melt adhesive powder, wherein the hot melt adhesive film includes at least one of PP film, PA film, and EVA film; and the hot melt adhesive powder includes at least one of PP powder, PA powder, and EVA powder.

[0028] Furthermore, the thickness of the hot melt adhesive film is 0.05-0.2mm. The thickness of the hot melt adhesive film can be adjusted according to actual needs.

[0029] Furthermore, the hot melt adhesive is disposed between the body material and the adhesive medium layer to serve as an adhesive.

[0030] Thirdly, the method for preparing the composite material that maintains the golden appearance of basalt fibers provided in this application includes the following steps:

[0031] Step 1: Lay a thermoplastic material on the surface of basalt fiber material and hot press it to prepare a basalt gold appearance layer with a gold appearance.

[0032] Step 2: Lay an adhesive medium layer on one surface of the obtained basalt gold appearance layer, and then perform hot pressing to obtain the composite material with the gold appearance.

[0033] Furthermore, the thermoplastic material is a thermoplastic film; the thermoplastic film includes at least one of PE film, PP film, PET film, PC film, and TPU film.

[0034] Furthermore, the thermoplastic material is a thermoplastic powder; the thermoplastic film is at least one of PE powder, PP powder, PET powder, PC powder, and TPU powder.

[0035] Fourthly, this application provides a method for preparing a composite material that retains the golden appearance of basalt fibers, wherein the side of the composite material with the adhesive medium layer is laid on the body material and hot-pressed to obtain the composite material.

[0036] Furthermore, the body material is a thermoplastic material or a thermosetting material;

[0037] Furthermore, when the base material is a thermosetting material, a hot melt adhesive layer is laid between the side of the composite material with the adhesive medium layer and the base material.

[0038] Furthermore, the thermoplastic material other than the bulk material is obtained by mixing thermoplastic resin, silicone aerogel and silicone oil in a mass ratio of 80-90:1-4:4-8.

[0039] Within this range, the addition of silica aerogel can effectively ensure that thermoplastic materials can form a film with good transparency on the surface of basalt fibers.

[0040] Within this range, the amount of silicone oil added can effectively enhance transparency and color retention while ensuring good processability of the thermoplastic material.

[0041] Within this range, the silicone oil content can result in higher viscosity. The specific silicone oil used in this application can improve the viscosity and flowability of thermoplastic materials in a flowing state, thereby increasing viscosity. However, adding too much silicone oil will actually reduce viscosity.

[0042] Fifthly, this application provides an automotive interior component, including the aforementioned composite material.

[0043] Sixthly, this application provides a bag material, including the composite material provided above.

[0044] The beneficial effects of the technical solution provided in this application include:

[0045] 1. The composite material provided in this application contains a transparent thermoplastic material in its golden-colored composite layer, which can improve the discoloration problem. Therefore, it can maintain the golden appearance of basalt fiber for a long time, which is conducive to the promotion and application of basalt fiber in automotive interior parts, bags and other fields.

[0046] 2. The method for preparing composite materials provided by the present invention improves problems such as discoloration and poor composite strength by adding thermoplastic materials, and improves the discoloration problem by controlling the process conditions during the preparation process. The final composite material maintains the golden appearance of basalt while having good mechanical properties and good durability. It also has the advantages of being environmentally friendly and simple in preparation process. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the composite material provided in Embodiment 6 of this application;

[0049] Figure 2 This is a view of the composite material provided in Example 5 of this application after being placed for 3 months.

[0050] Explanation of reference numerals in the attached diagram: 1. Basalt gold outer layer; 2. Adhesive medium layer; 3. Body material. Detailed Implementation

[0051] The technical solution of this application will be clearly and completely described below with reference to the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0052] The embodiments and comparative examples in this application involve amino-modified silicone oil manufactured by Wacker Chemie, model HDK H 207; epoxy-modified silicone oil manufactured by Dow Corning, model Dow Corning EP 4850; and polyether-modified silicone oil manufactured by Schlumberger, model KS 660. The ordinary silicone oil is manufactured by Dow Corning, model DC200 fluid, 350cs.

[0053] Examples 1-5 and Comparative Examples 1-2

[0054] Preparation of composite materials with a golden appearance:

[0055] Step 1: Lay thermoplastic materials (including thermoplastic resin, silicone aerogel and silicone oil) on the surface of basalt fiber material and perform hot pressing composite to prepare a basalt gold appearance layer with a golden appearance.

[0056] Step 2: Lay an adhesive medium layer on one surface of the obtained basalt gold appearance layer, and then perform hot pressing to obtain the gold appearance composite material.

[0057] The parameter settings for Examples 1-4 and Comparative Example 1 are shown in Table 1:

[0058] Table 1

[0059]

[0060] Examples 6-8

[0061] Preparation of composite materials:

[0062] The composite materials obtained in Examples 1-3, with the adhesive medium layer on one side, were respectively laid on the base material and hot-pressed to obtain composite materials, corresponding to Examples 6-8. The materials and parameter settings in Examples 6-8 are shown in Table 2. A schematic diagram of the composite material structure obtained in Example 6 is shown in [Table 2]. Figure 1 .

[0063] Table 2

[0064]

[0065]

[0066] Example 9

[0067] Preparation of composite materials:

[0068] The side of the composite material with the adhesive medium layer obtained in Example 4 was laid on the carbon fiber reinforced epoxy resin composite material and hot-pressed (conditions: 5MPa, 180℃, hot pressing for 3min) to obtain the composite material.

[0069] Example 10

[0070] Preparation of composite materials:

[0071] The side of the composite material with the adhesive medium layer obtained in Example 5 was laid on the carbon fiber reinforced epoxy resin composite material and hot-pressed (conditions: 5MPa, 180℃, hot pressing for 3min) to obtain the composite material.

[0072] Comparative Example 3

[0073] Preparation of composite materials:

[0074] The side of the composite material with the adhesive medium layer obtained in Comparative Example 1 was laid on the carbon fiber reinforced epoxy resin composite material and hot-pressed (conditions: 5MPa, 180℃, hot pressing for 3min) to obtain the composite material.

[0075] Comparative Example 4

[0076] Preparation of composite materials:

[0077] The side of the composite material with the adhesive medium layer obtained in Comparative Example 2 was laid on the main material (carbon fiber reinforced epoxy resin composite material) and hot-pressed (conditions: 5MPa, 180℃, hot pressing for 3min) to obtain the composite material.

[0078] Performance testing

[0079] The properties of the composite materials prepared in Examples 6-9 and Comparative Examples 3-6 were tested, and the test results are shown in Table 3. Furthermore, the properties of the composite materials prepared in Examples 6-9 and Comparative Examples 3-6 were tested.

[0080] The tensile strength test method shall be carried out in accordance with the GB / T 1447-2005 standard;

[0081] The impact toughness test method is conducted in accordance with the GB / T2567-2008 standard.

[0082] Table 3

[0083] Tensile strength (MPa) <![CDATA[Impact toughness (KJ / m 2 )]]> Exterior color Example 6 270.8 41.3 gold Example 7 271.6 42.4 gold Example 8 251.9 38.9 gold Example 9 268.3 39.7 Partially brown Example 10 239.6 30.4 Partially brown Comparative Example 3 242.1 34.9 gold Comparative Example 4 262.2 38.1 brown

[0084] As can be seen from Table 3, the composite material prepared by the method of the present invention can maintain the golden appearance of basalt while also having good mechanical properties, and has good application prospects. In Example 5, ordinary silicone oil was added. Since it does not contain active groups, the thermoplastic material has poor adhesion, and the composite material with bulk prepared using it has poor mechanical properties.

[0085] In addition, the composite material prepared in Example 5 also had a good golden appearance, but after being stored for three months, the golden part of the composite material prepared in Example 5 turned brown. See [link to example]. Figure 2 .

Claims

1. A composite material that retains the golden appearance of basalt fibers, characterized in that, include: A basalt gold-colored outer layer, comprising basalt fibers and a thermoplastic film, wherein the thermoplastic film is disposed on the surface of the basalt fibers; An adhesive medium layer, one side of which is bonded to the surface of the basalt gold-colored outer layer by an adhesive; The thermoplastic film also includes nano-silica aerogel and silicone oil; The silicone oil is at least one of amino-modified silicone oil, epoxy-modified silicone oil, or polyether-modified silicone oil. The thermoplastic film is obtained by mixing thermoplastic resin, silicone aerogel and silicone oil in a mass ratio of 80-90:1-4:4-8.

2. The composite material that maintains the golden appearance of basalt fibers according to claim 1, characterized in that, The thermoplastic film includes at least one of PE, PP, PET, PC, and TPU.

3. The composite material that maintains the golden appearance of basalt fibers according to claim 1, characterized in that, The adhesive medium layer is a non-woven fabric or fiber felt.

4. The composite material that maintains the golden appearance of basalt fibers according to claim 1, characterized in that, The adhesive is a resin.

5. A basalt fiber reinforced resin-based composite material, characterized in that, The basalt fiber reinforced resin matrix composite material includes a bulk material and a composite material that maintains the golden appearance of basalt fibers as described in any of claims 1-4, wherein the composite material that maintains the golden appearance of basalt fibers is disposed on the surface of the bulk material.

6. A method for preparing a composite material that retains the golden appearance of basalt fibers as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Step 1: Lay a thermoplastic material on the surface of basalt fiber material and hot press it to prepare a basalt gold appearance layer with a gold appearance. Step 2: Lay an adhesive medium layer on one surface of the obtained basalt gold appearance layer, and then perform hot pressing to obtain the composite material with the gold appearance.

7. A method for preparing a basalt fiber reinforced resin matrix composite material, characterized in that, The composite material with the adhesive medium layer that maintains the golden appearance of basalt fiber as described in any one of claims 1-4 is laid on the body material and hot-pressed to obtain the basalt fiber reinforced resin-based composite material.

8. The application of the composite material according to any one of claims 1-4, which retains the golden appearance of basalt fiber, in the field of automotive interior parts or luggage materials.

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