Preparation of environment-friendly composite material containing no petrochemical organic adhesive and used for furniture or decoration

Abstract

The invention discloses an organic-adhesive-free composite material capable of being used for furniture and decoration. The organic-adhesive-free composite material comprises the following components: glutinous rice pulp, calcium oxide, silica sol, alum, quartz powder, wood flour, straw and a small amount of siloxane. The composite material disclosed by the invention does not contain an organic adhesive material, the cost is reduced by adopting the raw materials with low price, no harmful substance is released, and meanwhile, the composite material has good ageing resistance, material strength and machinability. Straw and wood flour are adopted as filling reinforcing materials, and waste can be recycled. The composite material substitute plate can meet the ever-increasing material requirements of people, the wood cutting consumption is reduced, and the ecological environment is protected.

Description

Technical Field

[0001] The invention relates to the field of environmentally friendly furniture and home decoration boards, and in particular to a method for preparing a composite material that does not contain an organic binder and can be used to replace traditional furniture boards and home decorations. Technical Background

[0002] With the progress of social development, people have higher and higher requirements for living standards. Furniture boards and home decoration materials are widely used in every family. Wood is cut down and used in large quantities by humans, resulting in serious soil erosion and damage to the natural environment. Today, when people pay more and more attention to the natural environment, people cut down as few trees as possible. In addition, wood itself also has the disadvantages of being easily absorbed by water, being eaten by insects and being corroded by the environment. With the development of adhesive technology, people use artificial boards in large quantities. However, most of the artificial boards on the market contain formaldehyde adhesives, which have potential harm to people's bodies. Although some new boards do not contain formaldehyde adhesives, they are expensive and contain more other organic adhesives. The main raw materials of organic adhesives come from petroleum. In the production, preparation and use of organic adhesives, it is inevitable to pollute the environment. In addition, petrochemical resources are limited resources and are unsustainable. The present invention discloses a low-cost, durable, resource-saving, beautiful, moisture-proof, and organic binder-free new environmentally friendly material for replacing wood and traditional boards. Summary of the invention

[0003] Based on the technical problems existing in the technical background, the present invention proposes a method for preparing an environmentally friendly composite material for furniture and decorative panels that does not contain petrochemical organic adhesives. The technical solution of the present invention is as follows: A composite material free of petrochemical industrial organic adhesives comprises the following ingredients: 5-40% glutinous rice flour, 10-50% calcium oxide, 5-35% silica sol, 1-6% alum, 0-50% quartz powder, 0-40% wood powder, 0-30% straw and 2-5% siloxane.

[0004] The method for preparing the composite material without petrochemical adhesive comprises the following steps: Step 1, grinding glutinous rice into powder with a particle size greater than or less than 100 mesh; Step 2, adding the prepared glutinous rice powder to distilled water with a mass several times the mass of the glutinous rice powder, heating it to 95° C., and keeping it warm for several hours for heat treatment; Step 3, preparing glutinous rice paste by quickly and fully stirring the glutinous rice material prepared in step 2; Step 4, adding a certain proportion of silica sol to the glutinous rice paste and stirring thoroughly; Step 5, adding a certain amount of quicklime calcium oxide powder to the material obtained in step 4, stirring thoroughly, sealing and placing for a period of time until the temperature is below 50° C.; Step 6, grinding the material obtained in step 5 by three rollers for several times to obtain a material with a scraper fineness of less than 20 microns; Step 7, adding a certain amount of alum potassium aluminum sulfate aqueous solution based on step 6, and stirring thoroughly; Step 8, the material in step 7 is sealed and placed statically for 20 hours, the upper clear liquid is poured out, and the lower material is left; Step 9, adding a certain amount of quartz powder with a particle size less than 200 mesh to the slurry in step 8 and mixing them thoroughly; Step 10, adding a certain amount of wood powder or straw powder to the material in step 9 and mixing them thoroughly; Step 11, the material obtained in step 10 is introduced into a plate mold, heated and dried at 90° C. until the weight no longer decreases, and then hot-pressed at 120° C. for several hours to obtain a composite plate block; Step 12, immersing the composite board block obtained in step 11 into silicone by vacuuming, leaving it for several hours, and drying it at low temperature to obtain a composite board. DETAILED DESCRIPTION

[0005] Example 1

[0006] A composite material free of petrochemical industrial organic adhesives comprises the following ingredients (by weight): 30 parts of glutinous rice flour, 40 parts of calcium oxide, 20 parts of silica sol (calculated by solid parts), 3 parts of alum, 20 parts of quartz powder, 30 parts of wood powder, 20 parts of straw and 3 parts of siloxane.

[0007] The composite material is prepared by the following steps: Step 1, grinding glutinous rice into glutinous rice powder with a particle size greater than or less than 100 mesh; Step 2, adding the prepared glutinous rice powder to distilled water with a mass 5 times the mass of the glutinous rice powder, and heating it at 95° C. for 2 hours; Step 3, preparing glutinous rice paste by quickly and fully stirring the glutinous rice material prepared in step 2; Step 4, adding silica sol to the glutinous rice slurry and stirring thoroughly; Step 5, adding quicklime calcium oxide powder to the material obtained in step 4, stirring thoroughly, sealing and placing for a period of time until the temperature is below 50° C.; Step 6, grinding the material obtained in step 5 by three rollers for several times to obtain a material with a scraper fineness of less than 20 microns; Step 7, adding an alum aqueous solution (weight content 20%) based on step 6, and stirring thoroughly; Step 8, the material in step 7 is sealed and placed statically for 20 hours, the upper clear liquid is poured out, and the lower material is left; Step 9, adding quartz powder with a particle size of less than 200 mesh to the slurry in step 8 and mixing thoroughly; Step 10, adding wood powder or straw powder to the material in step 9 and mixing thoroughly; Step 11, the material obtained in step 10 is introduced into a plate mold, heated and dried at 90° C. until the weight no longer decreases, and then hot-pressed at 120° C. for several hours to obtain a composite plate block; Step 12, immersing the composite board block obtained in step 11 into tetramethoxysilane by vacuuming, leaving it for several hours, and drying it at low temperature to prepare a composite board.

Claims

1. A composite material free of petrochemical industry organic adhesives, characterized in that: Environmentally friendly raw materials are used to achieve bonding between various components. The composite material includes the following raw materials: glutinous rice flour, calcium oxide, silica sol, alum, quartz powder, wood powder, straw and siloxane.

2. The material preparation method is characterized in that The preparation process is as follows: three-roller grinding is used to mix glutinous rice paste, silica sol and quicklime, then the mixture is treated with alum as a modifier, quartz powder, wood powder and straw powder fillers are added, and then hot pressing and siloxane treatment are carried out.

3. The composite material according to claim 1, characterized in that The mass contents of the raw materials in the board are 5-40% glutinous rice flour, 10-50% calcium oxide, 5-35% silica sol, 1-6% alum, 0-50% quartz powder, 0-40% wood powder, 0-30% straw and 2-5% siloxane.

4. The composite material according to claim 1, characterized in that The mass ratio of the rice flour to calcium oxide is between 0.3 and 1.

5. The composite material according to claim 1, characterized in that The mass ratio of the rice flour to the silica sol is between 0.5 and 1.

5.

6. The composite material according to claim 1, characterized in that The siloxane is one or more of dimethyldimethoxysilane, methyltrimethoxysilane, tetramethoxysilane, diethyldiethoxysilane, ethyltriethoxysilane and tetraethoxysilane.

7. The composite material according to claim 1, characterized in that The mass content of soluble metal ions in the silica sol does not exceed 17% of its solid content.

8. The composite material according to claim 1, characterized in that The particle size of the quartz powder is less than 200 meshes.

9. The composite material according to claim 1, characterized in that The oil content of the wood powder is not higher than 10% by mass, and the fiber diameter is not more than 100 microns.

10. The composite material according to claim 1, characterized in that The fiber diameter of the straw powder does not exceed 100 microns.