A method for preparing FRP bamboo straw composite component

Abstract

The present invention discloses a method for preparing an FRP bamboo straw composite component, wherein the composite component is composed of a bamboo integrated wood core material, an FRP wrapping layer, a straw waste compacting layer, a bamboo integrated wood outer layer, and a fireproof surface layer. When preparing the component, each layer is assembled by a bamboo integrated wood core material, an FRP cloth, a straw object block that has been preliminarily compacted by a machine, and an original bamboo strip brushed with glue, and then uniformly hot-pressed in a hot press in one step. The binder selected for hot pressing is a new type of resorcinol-modified phenolic resin glue with an anti-corrosion function, and finally the surface layer is fireproofed by an impregnation method. The composite component includes a 3-5 mm CFRP wrapping layer, which can improve the overall mechanical strength of the column. At the same time, the addition of FRP material and straw reduces the deadweight of the composite component and increases the overall stability of the component. At the same time, the addition of straw waste and the effective use of bamboo materials are in line with the concept of environmental protection and sustainable development.

Description

Technical Field

[0001] The invention relates to a method for preparing an FRP bamboo straw composite component, belonging to the field of engineering bamboo material manufacturing Background Art

[0002] Since the reform and opening up in the 1980s, my country's economy has entered a high-speed development track. With the rapid development of the construction industry, in addition to traditional reinforced concrete materials, the domestic demand for wood and wood products is also increasing. my country is a country with relatively poor per capita forest resources, but it is the main producer of bamboo resources in the world. There are more than 400 species of bamboo plants in more than 40 genera in my country, among which the bamboo species in the south of the Yangtze River are the most, the growth is the most vigorous, and the area is the largest. Because of the defects of bamboo itself, such as small diameter, uneven structure, easy to rot, and anisotropy, native bamboo cannot be a good building material. Fiber reinforced composite material, referred to as FRP (Fiber reinforced polymer), is a high-performance material formed by mixing fiber material and matrix material in a certain proportion. Because FRP material has the advantages of light weight and hardness, non-conductive, high mechanical strength, and corrosion resistance, it is more and more widely used in construction projects. During the summer and autumn harvests in rural areas of my country every year, there are always a large number of wheat, corn and other straws burned in the fields, which not only causes serious air pollution in my country, but also is a serious waste of resources. According to incomplete statistics, my country's rural areas produce about 700 million tons of straw every year. The effective treatment and utilization of these straw wastes has become one of the problems that must be solved in the development of modern society. In view of these situations, the present invention comprehensively utilizes raw bamboo pieces, FRP and straw waste to propose a method for preparing FRP bamboo straw composite components. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a method for preparing an FRP bamboo straw composite component, which has the advantages of high overall component strength, strong insect and fire resistance, resource conservation and environmental friendliness.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A method for preparing an FRP bamboo straw composite component, wherein the composite component is composed of a bamboo laminate core layer, a 3-5 mm thick FRP wrapping layer, a straw compacting layer containing an insect repellent, a bamboo laminate outer layer, and a fireproof surface layer from the inside to the outside. When preparing the component, each layer is formed by hot pressing the bamboo laminate core, the FRP cloth, the straw block that has been preliminarily compacted by a machine, and the original bamboo strips in a hot press in one step. The binder used for hot pressing is a new type of resorcinol-modified phenolic resin glue with anti-corrosion function. Finally, the surface layer is fireproofed by an impregnation method.

[0006] Furthermore, the composite component comprises an FRP wrapping layer, and the thickness of the FRP cloth is 3-5 mm.

[0007] Furthermore, the straw compaction layer of the combined component is a specially treated compacted straw block before the hot pressing process.

[0008] Furthermore, the straw block is straw waste that has been preliminarily compacted mechanically, and when the straw waste is mechanically compacted, a high-efficiency insect repellent is mixed and compressed.

[0009] Furthermore, the binder used in the hot pressing of the combined component is a new type of resorcinol-modified phenolic resin glue with anti-corrosion function.

[0010] Furthermore, after the composite component is hot-pressed and formed, a surface fireproofing treatment is performed using an immersion method to form an outermost fireproof surface layer.

[0011] The beneficial effects of the present invention are as follows: the composite component contains a 3-5 mm CFRP wrapping layer, which can improve the overall mechanical strength of the composite component. At the same time, the addition of FRP material and straw reduces the dead weight of the composite material column and increases the overall stability of the component. At the same time, the straw waste is mixed with a high-efficiency insect repellent during the initial mechanical compaction, so that the composite component has an insect-proof effect. At the same time, the addition of straw waste and the effective use of bamboo materials are in line with the concept of environmental protection and sustainable development. At the same time, the fireproof treatment of the surface of the composite component enables the composite component to have a certain fireproof ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A structural schematic diagram of a method for preparing a FRP bamboo straw composite component;

[0013] Figure 2 Schematic diagram of the structure of the composite column before hot pressing.

[0014] In the figure: 1 is the core material of bamboo laminated wood; 2 is the FRP wrapping layer; 3 is the straw compaction layer; 4 is the outer layer of bamboo laminated wood; 5 is the fireproof surface layer; 6 is the straw block; 7 is the original bamboo strip. DETAILED DESCRIPTION

[0015] In order to explain the advantages and technical solutions of the present invention clearly, Figure 1 and Figure 2 The present invention is further described. The present invention covers any substitutions, modifications, equivalent methods and solutions made on the essence and scope of the present invention as defined by the claims.

[0016] Reference Figure 1 and Figure 2 , as follows: A method for preparing an FRP bamboo straw composite component, the composite component is composed of a bamboo laminate core material (1), an FRP wrapping layer (2), a straw compacting layer (3), a bamboo laminate outer layer (4), and a fireproof surface layer (5). Figure 2 Each layer is respectively composed of a bamboo laminate core material (1), an FRP wrapping layer (2), a straw block that has been preliminarily compacted by a machine (6), and original bamboo strips (7) that are assembled by brushing glue, and then hot-pressed in a hot press in one step. The binder used for hot pressing is a new type of resorcinol-modified phenolic resin glue with anti-corrosion function. Finally, the surface layer (5) is fireproofed by an immersion method.

[0017] Furthermore, the composite component comprises an FRP wrapping layer (2), and the FRP wrapping layer (2) is 3-5 mm thick.

[0018] Furthermore, the straw compaction layer (3) of the combined component is a specially treated straw block (6) before the hot pressing process.

[0019] Furthermore, the straw block (6) is straw waste that has been preliminarily mechanically compacted, and when the straw waste is mechanically compacted, a high-efficiency insect repellent is mixed and compacted.

[0020] Furthermore, the binder used in the hot pressing of the combined component is a new type of resorcinol-modified phenolic resin glue with anti-corrosion function.

[0021] Furthermore, after the composite component is hot-pressed and formed, a surface fireproofing treatment is performed using an immersion method to form an outermost fireproofing surface layer (5).

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing an FRP bamboo straw composite component, wherein the composite component is a composite material column, the composite component comprises a bamboo laminate core material (1), an FRP wrapping layer (2), a straw compacting layer (3), a bamboo laminate outer layer (4), and a fireproof surface layer (5), wherein: From the inside to the outside, the material is respectively composed of a bamboo composite core material (1), an FRP wrapping layer (2), a straw block (6) that has been preliminarily compacted by a machine, and original bamboo strips (7) that are assembled by brushing glue, and then hot-pressed in a hot press in one step, and finally the fireproof surface layer (5) is fireproofed by an immersion method; the FRP wrapping layer (2) is 3-5 mm thick; the straw block (6) is straw waste that has been preliminarily compacted by a machine, and the straw waste is mixed with a high-efficiency insect repellent and pressed during mechanical compaction.

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