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Completely degradable plant protein wood adhesive and preparation thereof

A wood adhesive and vegetable protein technology, which is applied in the field of fully degradable vegetable protein wood adhesive and its preparation, can solve the problems of less research on vegetable protein, and achieve the effects of simple process operation, high bonding strength and stable properties.

Active Publication Date: 2011-06-22
郑州佰沃科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the use of vegetable protein to make wood adhesives is mainly focused on the modification of soybean protein, and there are relatively few studies on other vegetable proteins.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: The formula (parts by weight) of a completely degradable vegetable protein wood adhesive:

[0030] Gluten 9

[0031] Water 100

[0032] Citric acid 0.77

[0033] Disodium hydrogen phosphate 2.21

[0034] Phosphorus oxychloride 0.5

[0035] Carbon tetrachloride 2.5

[0036] Glycerin 0.5

[0037] Potassium Sorbate 0.1.

[0038] The preparation process is as follows: dissolving citric acid and disodium hydrogen phosphate in water at 20-30°C to prepare a buffer solution of pH 6.0, adding gluten while stirring to make it uniformly dispersed into an emulsion. Phosphorus oxychloride is pre-dissolved in carbon tetrachloride to prepare a 20% (v / v) solution. Under stirring, the phosphorus oxychloride solution was slowly added dropwise to the reaction system, and the dropwise addition was completed in 10 minutes. Keep the stirring speed unchanged, and keep the temperature for 60 minutes. 5 minutes before the end of the reaction, glycerin and potassium sorbate were added. After t...

Embodiment 2

[0039] Example 2: The formula (parts by weight) of a completely degradable vegetable protein wood adhesive:

[0040] Defatted soy flour 10

[0041] Water 100

[0042] Acetic anhydride 1

[0043] Sodium polyacrylate 0.1

[0044] Dehydroacetic acid 0.25

[0045] Sodium bentonite 5

[0046] The preparation process is as follows: the weighed defatted soybean flour is slowly added to water preheated to 50°C, the feeding time is controlled at 5 to 10 minutes, and the rotation speed is 150 rpm during the adding process. After stirring to form a homogeneous emulsion, acetic anhydride was added to the reaction system in 5 portions, and the addition was completed in 10 minutes. The stirring speed is reduced to 75r / min, and the temperature is kept for 90 minutes. When the reaction progressed to 80 minutes, sodium polyacrylate and dehydroacetic acid were added. After the reaction, the temperature is lowered to 20°C to 30°C, sodium-based bentonite is added, and stirring is continued for 5 minutes ...

Embodiment 3

[0047] Example 3: The formula (parts by weight) of a completely degradable vegetable protein wood adhesive:

[0048] Defatted rapeseed meal 10

[0049] Water 100

[0050] Sodium carbonate 11.5

[0051] Sodium bicarbonate 0.5

[0052] Sodium lauryl sulfate 0.5

[0053] Mercaptoethanol 0.2

[0054] Butyl p-hydroxybenzoate 0.2

[0055] Octanol 0.2

[0056] Kaolin 5.

[0057] The preparation process is as follows: sodium carbonate and sodium bicarbonate are respectively formulated into 0.1 mol / L concentration aqueous solution, and the two are mixed in a ratio of 4:6 to form a buffer solution. Preheat the buffer solution to 55°C, add the defatted rapeseed powder while stirring, the stirring speed is 100r / min, and the addition is complete within 5 minutes. Keep the stirring speed constant, add sodium lauryl sulfate and mercaptoethanol in sequence, and keep the temperature for 60 minutes. Add octanol during the reaction to eliminate the foam produced by the reaction. 5 minutes before the end of...

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Abstract

The invention relates to a full biodegradable plant protein wood adhesive and a preparation method thereof, and belongs to the technical field of adhesive. The adhesive is prepared from the following components in weight portion: 100 portions of water, 5 to 20 portions of plant protein powder, 0 to 15 portions of acidity regulator, 0.05 to 20 portions of modifying agent, 0.05 to 10 portions of assistant, 0.1 to 10 portions of preservative, and 0 to 10 portions of stuffing. The preparation method comprises the following steps in turn: adding the water into a container, and dissolving the acidity regulator under a stirring state; adding the plant protein powder into the container under the stirring state; at the same time, complementing the acidity regulator according to change situations of pH values; heating a reaction system to a temperature needed by modification reaction, adding the modifying agent and the assistant into the container under the stirring state, and keeping the temperature to make the mixture reacted for 15 to 240 minutes at a temperature of between 5 and 60 DEG C; and in the last 2 to 5 minutes of the temperature keeping reaction, adding the preservative into the solution, and stirring the mixture evenly; and adding the stuffing into the reaction system, stirring evenly the mixture, and finally obtaining the wood adhesive. The adhesive has the advantages that the adhesive is easy to process, good in adhering property, and degradable.

Description

Technical field [0001] The invention belongs to the technical field of adhesives, and particularly relates to a completely degradable vegetable protein wood adhesive and a preparation method thereof. Background technique [0002] Wood adhesives are generally macromolecular compounds. According to their different raw material sources, they can be divided into natural macromolecular adhesives and synthetic macromolecular adhesives. Natural polymer adhesives have a very long history in our country, and they were also used extensively in the United States and Europe in the first half of the last century. Since it mainly uses natural substances as raw materials, there are a large number of hydrophilic groups such as hydroxyl groups in the molecule, and its water resistance, heat resistance and bonding strength are not ideal, which limits its wide application in industry. Since the 1960s, with the expansion of the wood-based panel industry, the demand for adhesives has also increased,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00
Inventor 杨立新陈锡建
Owner 郑州佰沃科技发展有限公司
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