Preparation method of foaming material by using biological oil modified phenolic resin

A technology of phenolic resin and foam materials, applied in the field of biomass-based polymer materials, can solve problems such as environmental pollution, speed up the consumption of mineral resources, etc., and achieve the effects of reducing production costs, being beneficial to large-scale production, and improving performance.

Inactive Publication Date: 2012-08-01
BEIJING FORESTRY UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

However, because the raw material of the precursor phenolic resin comes from mineral materials such as petroleum, as a downstream product of petrochemical industry, it is limited by resources, which accelerates the consumption of mineral resources, and also pollutes the environment during the production process. Compared with other materials, biomass foam materials have great advantages of low cost, recyclability and partial biodegradability. The development of biomass foam materials has become a research hotspot in various countries.
There is no report on the preparation of phenolic foam materials with bio-oil

Method used

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  • Preparation method of foaming material by using biological oil modified phenolic resin
  • Preparation method of foaming material by using biological oil modified phenolic resin
  • Preparation method of foaming material by using biological oil modified phenolic resin

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preparation example Construction

[0026] The preparation method comprises the following steps:

[0027] (1) adding paraformaldehyde, bio-oil and basic catalyst weighed according to the above ratio into a reaction vessel, and reacting at 65-75° C. for 20-30 minutes to obtain methylolated bio-oil;

[0028] (2) Add phenol weighed according to the above-mentioned ratio to the above-mentioned hydroxymethylated bio-oil, heat up to 80-90°C, and within 90-120 minutes, add urea weighed according to the above-mentioned ratio in portions, and react for 20-30 Minutes, use an acid neutralizer to adjust the pH value of the resin between 6.8-7.2 to obtain a bio-oil modified phenolic resin for foaming. Wherein said alkaline catalyst is any one of sodium hydroxide, barium hydroxide, potassium hydroxide or ammonia water.

[0029] The bio-oil used in the method of the present invention can be woody biomass raw materials such as coniferous wood, broad-leaved wood or wood product waste such as waste wood-based panels and sawdust,...

Embodiment 1

[0035] (1) Add 70g of paraformaldehyde, 65g of bio-oil and 12g of sodium hydroxide into the reaction vessel, and react at 75°C for 20 minutes to obtain hydroxymethylated bio-oil;

[0036] (2) Add 100g of phenol to the above-mentioned hydroxymethylated bio-oil, heat up to 80-90°C, add urea three times within 90 minutes, add 15g each time, and react for 30 minutes, adjust the pH value of the resin with hydrochloric acid Between 6.8 and 7.2, a bio-oil modified phenolic resin for foaming was obtained, with a solid content of 74.4% and a viscosity of 3865mPa.s / 25°C;

[0037] (3) After mixing and stirring the above-mentioned 100g bio-oil modified phenolic resin, 5g Tween-80, and 15g n-hexane, add a mixture of 10g p-toluenesulfonic acid and phosphoric acid, the mixing ratio is calculated in parts by mass, p-toluenesulfonic acid Acid: phosphoric acid = 3:1, stirring for 2-10 minutes, and then foaming at 75°C for 30 minutes to obtain a bio-oil modified phenolic foam material, the prope...

Embodiment 2

[0039] (1) Add 55g of paraformaldehyde, 40g of bio-oil and 10g of potassium hydroxide into the reaction vessel, and react at 75°C for 30 minutes to obtain hydroxymethylated bio-oil;

[0040] (2) Add 100g of phenol to the above-mentioned hydroxymethylated bio-oil, heat up to 85°C, add urea in two times within 100 minutes, add 20g each time, and adjust the pH value of the resin with formic acid after 30 minutes of reaction. Between 7.0 and 7.2, the bio-oil modified phenolic resin used for foaming was obtained, the solid content of the obtained resin was 77.2%, and the viscosity was 4220mPa.s / 25°C;

[0041] (3) After mixing and stirring the 100g bio-oil modified phenolic resin prepared above, 4g Tween-80, and 12g cyclohexane evenly, add a mixture of 20g p-toluenesulfonic acid and phosphoric acid, the mixing ratio is calculated in parts by mass, p-toluene Sulfonic acid:phosphoric acid=0.5:1, stirring for 2-10 minutes, and then foaming at 60°C for 15 minutes to obtain a bio-oil mod...

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Abstract

The invention relates to a preparation method of a foaming material by using biological oil modified phenolic resin, and belongs to the technical field of biomass based polymer materials. The method comprises the following steps: uniformly stirring 100 parts by weight of biological oil modified phenolic resin, 1 to 4 parts by weight of surfactant and 5 to 12 parts by weight of foaming agent, adding 10 to 20 parts by weight of curing agent, and stirring for 2 to 10 minutes; and curing for 15 to 90 minutes in an enivornment at the temperature of 70-85 DEG C to obtain the biological oil modifiedphenolic resin. The modified phenolic foam has high strength by improving the toughness of the phenolic foaming material, is advantageous to environmental friendliness by reducing usage of phenol, formaldehyde and other petrochemical raw materials, and has the advantages of simple process, easiness for implementation and production cost reduction, so that the application field of biological oil is widened, and the market competiveness of the product is increased.

Description

technical field [0001] The invention relates to a method for preparing a foam material by using bio-oil modified phenolic resin, and belongs to the technical field of biomass-based polymer materials. Background technique [0002] Biomass-based materials are cheap, environmentally friendly, and renewable. In today's environment where oil prices are soaring and energy is increasingly scarce, it has incomparable advantages for petroleum-based products. Phenolic foam is a kind of thermal insulation material with excellent performance. It has the advantages of light weight, high rigidity, good dimensional stability, chemical corrosion resistance, good heat resistance, flame retardant, self-extinguishing, low smoke, and no spillage in case of fire. Widely valued, it is an excellent sound insulation, lightweight and energy-saving material in construction, electrical appliances, instrumentation, petrochemical and other industries. However, because the raw material of the precursor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/34C08G14/12C08G14/08C08J9/14
Inventor 常建民伊江平张继宗姚思旭车颜喆任学勇王文亮
Owner BEIJING FORESTRY UNIVERSITY
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