Preparation method of multi-wall layer weather-resistant plant fiber reinforced air pipe

Abstract

The invention provides a preparation method of a multi-wall layer weather-resistant plant fiber reinforced air pipe. The preparation method comprises the following steps of mixing and emulsifying modified plant fibers and phenolic foam materials in different proportions to obtain surface layer and core layer fiber foam materials, and performing paving in a laminated manner to obtain a plant fiberreinforced foam heat-insulation layer; sequentially paving an outer isolation layer, the plant fiber reinforced foam heat-insulation layer, a damp-proof layer and a sealing layer, spraying a couplingagent among the layers during paving, brushing vinyl resin, then paving the next layer by using a fiber-based plasticizing adhesive, and finally obtaining the multi-wall layer weather-resistant plantfiber reinforced air pipe; additionally arranging a mute buffer layer between the outer isolation layer and the plant fiber reinforced foam heat-insulation layer to increase the mute performance; or additionally arranging a phase change layer between the plant fiber reinforced foam heat-insulation layer and the moisture-proof layer to improve the energy-saving performance. The multi-wall layer weather-resistant plant fiber reinforced air pipe prepared by the invention has the advantages of good heat insulation performance, light weight, good flame-retardant performance and good anti-breaking performance.

Description

technical field

[0001] The invention belongs to the technical field of air ducts, and in particular relates to a preparation method of multi-wall weather-resistant plant fiber reinforced air ducts. Background technique

[0002] At present, the air ducts used in high-rise buildings mainly include: galvanized thin steel air ducts, glass fiber reinforced plastic air ducts and composite thermal insulation air ducts. These three types of air ducts have different characteristics during use. Among them, the galvanized thin steel air duct has high mechanical strength and low cost, but the metal material has high density, high quality, and poor sound insulation effect. It needs to install a muffler. At the same time, the metal material has poor corrosion resistance, is easy to rust, and the construction process is relatively complicated. It has gradually been adopted. disuse. FRP air ducts are prefabricated by hand, connected by flanges, have high fire resistance and corrosion resis...

Examples

Embodiment 1

[0028] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct of the present embodiment, the method is:

[0029] S1. Preparation of modified plant fibers: After crushing plant fiber materials into plant fibers with a length of 0.5 mm to 2 mm, immerse them in an alkaline solution with a temperature of 38 ° C to 42 ° C and a mass fraction of 3% for 60 minutes, and then rinse with water After 5 times, dry at a temperature of 90°C so that the water content of the plant fibers is ≤10%, and then spray a coupling agent aqueous solution with a mass fraction of 5% on the plant fibers, disperse and dry, and obtain a water content of ≤10% modified plant fiber; the alkali solution is an aqueous calcium hydroxide solution; the mass ratio of the dried plant fiber to an aqueous coupling agent solution with a mass fraction of 5% is 1:1; the aqueous coupling agent solution The coupling agent in is silane coupling agent KH560; The plant fiber material is wood...

Embodiment 2

[0037] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct of the present embodiment is as follows:

[0038] S1. Preparation of modified plant fibers: after crushing plant fiber materials into plant fibers with a length of 2 mm to 5 mm, immerse them in an alkali solution with a temperature of 38 ° C to 42 ° C and a mass fraction of 4% for 45 minutes, and then rinse with water for 3 After the first time, dry under the condition that the temperature is 100°C, so that the water content of the plant fiber is ≤10%, and then spray a coupling agent aqueous solution with a mass fraction of 5% on the plant fiber, disperse and dry, and obtain a water content of ≤10%. 10% modified plant fiber; the alkali solution is an aqueous calcium hydroxide solution; the mass ratio of the dried plant fiber to an aqueous coupling agent solution with a mass fraction of 5% is 1:1.2; in the aqueous coupling agent solution The coupling agent is silane coupling agent ...

Embodiment 3

[0045] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct with mute function in this embodiment is as follows:

[0046] S1. Preparation of modified plant fibers: After crushing plant fiber materials into plant fibers with a length of 2 mm to 5 mm, immerse them in an alkali solution with a temperature of 48 ° C to 52 ° C and a mass fraction of 2% for 60 minutes, and then rinse with water for 4 After the second time, dry under the condition that the temperature is 95°C, so that the water content of the plant fiber is ≤10%, and then spray a coupling agent aqueous solution with a mass fraction of 5% on the plant fiber, disperse and dry, and obtain a water content of ≤10%. 10% modified plant fiber; the alkali solution is an aqueous solution of sodium hydroxide; the mass ratio of the dried plant fiber to the aqueous coupling agent solution with a mass fraction of 5% is 1:1.2; in the aqueous coupling agent solution The coupling agent is silane ...

technical field

[0001] The invention belongs to the technical field of air ducts, and in particular relates to a preparation method of multi-wall weather-resistant plant fiber reinforced air ducts. Background technique

[0002] At present, the air ducts used in high-rise buildings mainly include: galvanized thin steel air ducts, glass fiber reinforced plastic air ducts and composite thermal insulation air ducts. These three types of air ducts have different characteristics during use. Among them, the galvanized thin steel air duct has high mechanical strength and low cost, but the metal material has high density, high quality, and poor sound insulation effect. It needs to install a muffler. At the same time, the metal material has poor corrosion resistance, is easy to rust, and the construction process is relatively complicated. It has gradually been adopted. disuse. FRP air ducts are prefabricated by hand, connected by flanges, have high fire resistance and corrosion resis...

Examples

Embodiment 1

[0028] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct of the present embodiment, the method is:

[0029] S1. Preparation of modified plant fibers: After crushing plant fiber materials into plant fibers with a length of 0.5 mm to 2 mm, immerse them in an alkaline solution with a temperature of 38 ° C to 42 ° C and a mass fraction of 3% for 60 minutes, and then rinse with water After 5 times, dry at a temperature of 90°C so that the water content of the plant fibers is ≤10%, and then spray a coupling agent aqueous solution with a mass fraction of 5% on the plant fibers, disperse and dry, and obtain a water content of ≤10% modified plant fiber; the alkali solution is an aqueous calcium hydroxide solution; the mass ratio of the dried plant fiber to an aqueous coupling agent solution with a mass fraction of 5% is 1:1; the aqueous coupling agent solution The coupling agent in is silane coupling agent KH560; The plant fiber material is wood...

Embodiment 2

[0037] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct of the present embodiment is as follows:

[0038] S1. Preparation of modified plant fibers: after crushing plant fiber materials into plant fibers with a length of 2 mm to 5 mm, immerse them in an alkali solution with a temperature of 38 ° C to 42 ° C and a mass fraction of 4% for 45 minutes, and then rinse with water for 3 After the first time, dry under the condition that the temperature is 100°C, so that the water content of the plant fiber is ≤10%, and then spray a coupling agent aqueous solution with a mass fraction of 5% on the plant fiber, disperse and dry, and obtain a water content of ≤10%. 10% modified plant fiber; the alkali solution is an aqueous calcium hydroxide solution; the mass ratio of the dried plant fiber to an aqueous coupling agent solution with a mass fraction of 5% is 1:1.2; in the aqueous coupling agent solution The coupling agent is silane coupling agent ...

Embodiment 3

[0045] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct with mute function in this embodiment is as follows:

[0046] S1. Preparation of modified plant fibers: After crushing plant fiber materials into plant fibers with a length of 2 mm to 5 mm, immerse them in an alkali solution with a temperature of 48 ° C to 52 ° C and a mass fraction of 2% for 60 minutes, and then rinse with water for 4 After the second time, dry under the condition that the temperature is 95°C, so that the water content of the plant fiber is ≤10%, and then spray a coupling agent aqueous solution with a mass fraction of 5% on the plant fiber, disperse and dry, and obtain a water content of ≤10%. 10% modified plant fiber; the alkali solution is an aqueous solution of sodium hydroxide; the mass ratio of the dried plant fiber to the aqueous coupling agent solution with a mass fraction of 5% is 1:1.2; in the aqueous coupling agent solution The coupling agent is silane ...