A kind of bark liquefaction product foam material and preparation method thereof

A technology of liquefied products and foam materials, applied in the field of materials, can solve problems such as the lack of petrochemical resources per capita, and achieve the effect of high water absorption characteristics

Active Publication Date: 2021-02-26
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials of the above-mentioned foams are all derived from petrochemical derivatives. my country is a country that lacks petrochemical resources per capita. In addition, the price of petrochemical products is constantly changing today, and the foam materials are in urgent need of upgrading.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The ground bark was leached with hot water and acetone, acetone:water=1:1, the solid-to-liquid ratio of bark and acetone aqueous solution was 1:10, and leached at 50°C for 16 hours. After extraction and concentration, the bark liquefaction product has a solid content of 45%, a tannin content of 90%, and a pH value of 5.0. Add 30g of water, 10g of formaldehyde and 6g of PEG400 to 10g of bark liquefaction product, and stir for 30s until fully mixed to obtain a uniform and stable mixed solution. Add 10 g of furan resin into the mixed solution, stir quickly and evenly, then add 5 g of diethyl ether, then add 6 g of p-toluenesulfonic acid solution with a concentration of 65%, and mix well. Put the uniformly stirred mixture into an oven at 60° C., let it stand for foaming for 30 minutes, and then take it out to obtain a rigid foam material of bark liquefaction product with uniform pore size.

[0030] The density of the foam material prepared by the above process is 0.05g / cm ...

Embodiment 2

[0032] The ground bark was leached with hot water and ethanol, ethanol: water = 1:1, the solid-to-liquid ratio of bark and ethanol aqueous solution was 1:10, and leached at 40°C for 10 hours. After extraction and concentration, the bark liquefaction product has a solid content of 40%, a tannin content of 85%, and a pH value of 4.5. Add 20g of water, 8g of formaldehyde and 6g of PEG400 to 10g of bark liquefaction product, and stir for 30s until fully mixed to obtain a uniform and stable mixed solution. Add 6g of pMDI to the mixed solution, stir quickly and evenly, then add 6g of cyclopentane, then add 5g of p-toluenesulfonic acid solution with a concentration of 65%, and mix well. Put the uniformly stirred mixture into an oven at 70° C., let it stand for 30 minutes, and then take it out to obtain a rigid foam material of bark liquefaction product with uniform pore size.

[0033] The density of the foam material that above-mentioned process prepares is 0.06g / cm 3 , the water a...

Embodiment 3

[0035] The ground bark was leached with hot water and acetone, acetone:water=1:1, the solid-to-liquid ratio of bark and acetone aqueous solution was 1:8, and leached at 40°C for 18 hours. After extraction and concentration, the bark liquefaction product has a solid content of 45%, a tannin content of 90%, and a pH value of 5.0. Add 20g of water, 10g of formaldehyde and 6g of PEG400 to 10g of bark liquefaction product, and stir for 30s until fully mixed to obtain a uniform and stable mixed solution. Add 10g of furan resin and pMDI resin (mass ratio: 1:1) into the mixed solution, stir quickly and evenly, add 5g of diethyl ether, then add 4g of 65% p-toluenesulfonic acid solution, and mix well. Put the uniformly stirred mixture into an oven at 60° C., let it stand for foaming for 30 minutes, and then take it out to obtain a rigid foam material of bark liquefaction product with uniform pore size.

[0036] The density of the foam material prepared by the above process is 0.053g / cm...

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Abstract

The invention provides a bark liquefied product foam material and a preparation method thereof. The method comprises the following steps that bark is treated so as to obtain the bark liquefied product, wherein the solid content of the bark liquefied product is 30-45%, the tannin content is 70-90%, and the pH value is 3.5-5.5; the bark liquefied product is added into a container, water, a cross-linking agent and a modifier are added, and uniform stirring is carried out so as to obtain a mixed solution; matrix resin is added into the mixed solution, uniform stirring is carried out, a foaming agent is added, then an acid catalyst is added, and uniform stirring is carried out so as to obtain a foamed mixture; and the foamed mixture is put into a drying oven, and standing and foaming are carried out so as to obtain the bark liquefied product foam material. According to the bark liquefied product foam material and the preparation method thereof, the additional values of a biomass material are increased, and the dependence on petrochemicals is reduced.

Description

technical field [0001] The invention relates to the field of materials, in particular to a bark liquefaction product foam material and a preparation method thereof. Background technique [0002] Polyurethane foam (PU), polystyrene foam (EPS) and phenolic resin foam (PF) materials are important thermal insulation materials in the construction field, important cushioning materials in the packaging field, and flower mud materials in the field of cut flower moisturizing. However, the raw materials of the above-mentioned foams are all derived from petrochemical derivatives. my country is a country that lacks petrochemical resources per capita. In addition, the prices of petrochemical products are constantly changing today, and foam materials are in urgent need of upgrading. Therefore, it is very meaningful to effectively utilize biomass resources to gradually replace petrochemical products and prepare biomass-based foam materials. Contents of the invention [0003] The inventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/14C08L61/14C08L61/00C08G8/28
CPCC08G8/28C08J9/141C08J9/142C08J2203/12C08J2203/14C08J2361/14C08J2461/00
Inventor 周晓剑杜官本徐洋李斌李涛洪雷洪王辉曹明
Owner SOUTHWEST FORESTRY UNIVERSITY
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