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A kind of plant fiber reinforced thermal insulation flame retardant phenolic foam material and preparation method thereof

A technology of phenolic foam material and plant fiber, which is applied in the field of preparation of plant fiber reinforced phenolic foam material and thermal insulation and flame retardant phenolic foam material, can solve the problems of polluting the environment and wasting resources, and achieves simple preparation method and short foaming time , Improve the effect of mechanical properties

Active Publication Date: 2016-02-10
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to papermaking and livestock feed, most of the utilization of corn, wheat straw and other straws in my country is disposed of by landfill and incineration, which not only wastes resources but also pollutes the environment.

Method used

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  • A kind of plant fiber reinforced thermal insulation flame retardant phenolic foam material and preparation method thereof
  • A kind of plant fiber reinforced thermal insulation flame retardant phenolic foam material and preparation method thereof
  • A kind of plant fiber reinforced thermal insulation flame retardant phenolic foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1 Making corn stalk fiber reinforced phenolic foam composites

[0061] Step 1: Pretreatment of Corn Stalks

[0062] Step 101: first put the corn stalks with a water content lower than 10% into a corer separator to remove the core layer inside the stalk (the main component of the corn stalk core layer is lignin, which is an unnecessary substance in the present invention), and then Cut into the first chopped fibers with a length of less than or equal to 1mm in a cutting machine; then, place the first chopped fibers in a 10% NaOH aqueous solution at a temperature of 22° C., at a stirring speed of 60 rpm After soaking for 60 minutes under the condition of 1 / min, take it out, wash it repeatedly with deionized water to neutrality, and obtain the A pretreated plant fiber; finally, place the A pretreated plant fiber at a temperature of 30° C. and the mass percentage concentration is 50%. In the flame retardant aqueous solution, after soaking for 75 minutes at a mechani...

Embodiment 2

[0088] Example 2 Manufacture of long wheat straw fiber reinforced phenolic foam composites

[0089] Step 1: Pretreatment of long straw fibers

[0090] Step 101: First, cut the long wheat straw fibers with a moisture content of less than 5% into first chopped fibers with a length of less than or equal to 1mm with a cutting machine; In the NaOH aqueous solution with a concentration of 20%, after soaking for 40 minutes at a stirring speed of 55 rpm, take it out, wash it repeatedly with deionized water to neutrality, and obtain A pretreated plant fiber; finally, A pretreated Plant fibers are placed in a diammonium phosphate aqueous solution with a mass percentage concentration of 65% at a temperature of 25°C, soaked for 40 minutes at a mechanical stirring speed of 55 rpm, then taken out, and placed in an oven at a temperature of 60°C Drying and processing for 180 minutes to obtain A ready-to-use chopped plant fibers;

[0091] Step 102: First, cut the long wheat straw fibers with...

Embodiment 3

[0107] Embodiment 3 makes the phenolic foam composite material reinforced by Ula grass fiber

[0108] Ulagrass is one of the only two plants in the world's plant kingdom that can resist fungal erosion and parasitic ability for life, which is a natural attribute that ordinary animal and plant products do not have. Ulagrass has an excellent ability to absorb and not be eroded, it can absorb moisture, and automatically adjust and maintain the degree of humidity. Applying this plant fiber to the development of phenolic foam, the mechanical properties, thermal insulation performance and weather resistance of phenolic foam are expected to be improved.

[0109] Step 1: Pretreatment of Ulagrass

[0110] Step 101: first cut the Ulagrass fiber with a moisture content of less than 5% into first chopped fibers with a length less than or equal to 1 mm by cutting machine; then place the first chopped fibers at a temperature of 20° C. In a 5% NaOH aqueous solution, after soaking for 90 min...

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Abstract

The invention discloses a plant fiber reinforcing type heat-preservation inflaming-retarding phenolic foam material and a preparing method of the plant fiber reinforcing type heat-preservation inflaming-retarding phenolic foam material. The plant fiber reinforcing type heat-preservation inflaming-retarding phenolic foam material is formed by adding plant fibers which have different lengths and are of a hollow structure into phenolic resin. The preparing method of the plant fiber reinforcing type heat-preservation inflaming-retarding phenolic foam material comprises the steps that the dried plant fibers, obtaining through cutting, with the different lengths are mechanically mixed with the phenolic resin, an emulsifying agent, a coupling agent, a foaming agent and a curing agent, the mixture is cured and foamed for 30 min to 120 min at the curing temperature ranging from 45 DEG C to 80 DEG C, and then the plant fiber reinforcing type phenolic foam material used for internal walls and external walls of buildings is obtained after demolding. According to the plant fiber reinforcing type heat-preservation inflaming-retarding phenolic foam material and the preparing method of the plant fiber reinforcing type heat-preservation inflaming-retarding phenolic foam material, phenolic foam is reinforced through the environment-friendly and renewable natural plant fibers, the heat-preservation property and the inflaming-retarding property of the material are good, and the production cost of the phenolic foam material is greatly reduced due to the fact that the plant fibers are cheap and easy to obtain.

Description

technical field [0001] The present invention relates to a kind of phenolic foam material, more particularly, refers to a kind of plant fiber reinforced phenolic foam material with thermal insulation and flame retardant properties used for building interior and exterior wall insulation layers, and the thermal insulation resistance reinforced by plant fiber shell. Preparation method of phenolic foam material. Background technique [0002] At present, my country's building energy consumption accounts for 27.6% of the total energy consumption of the society, and energy waste is serious. Therefore, building energy conservation is a systematic project to alleviate my country's energy shortage and improve energy utilization. The core of building energy conservation is to innovate the building envelope (such as non-load-bearing walls, external wall insulation) and heating systems. The renewal of thermal insulation materials for interior and exterior walls is the core of energy-savi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08L97/02C08K3/22C08K3/02C08K3/32C08K3/38C08K5/523C08J9/14C08J5/06
Inventor 顾轶卓李敏杨中甲王绍凯张佐光李艳霞
Owner BEIHANG UNIV
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