A kind of antibacterial soybean meal adhesive and its preparation method and application

Abstract

The invention relates to the technical field of biomass adhesives, and specifically discloses an antibacterial soybean meal adhesive and a preparation method and application thereof. The antibacterial soybean meal adhesive of the present invention comprises soybean meal, water, a performance enhancer and a crosslinking agent; the performance enhancer is obtained by crosslinking reaction of polyethyleneimine, polyvinyl alcohol and carboxymethyl chitosan ; The cross-linking agent is a cross-linking agent that enables the soybean meal and the performance enhancer to be cross-linked through Maillard reaction. The soybean meal adhesive has good dry and wet strength, excellent antibacterial and antifungal properties, mild heat treatment conditions during processing, and short curing time, and is favorable for industrial application.

Description

technical field

[0001] The invention relates to the technical field of biomass adhesives, in particular to an antibacterial soybean meal adhesive and a preparation method and application thereof. Background technique

[0002] Precious wood resources are relatively scarce, and plantation forest resources are abundant. The use of plantation fast-growing wood to prepare wood-based panels through adhesives is the main raw material for furniture flooring and interior decoration in the living environment. The total output of wood-based panels is large, most of which are plywood products. . According to the average production of 9 cubic meters of wood-based panels per ton of adhesive, the consumption of adhesive for plywood is huge (solid content 50%), of which urea-formaldehyde resin and its modified products dominate the adhesive. Urea-formaldehyde resin adhesive is widely used in the wood industry due to its advantages of abundant raw materials, low price and good water solubil...

Examples

Embodiment 1

[0038] This embodiment provides a soybean meal adhesive of the present invention and a preparation method thereof.

[0039] Specifically:

[0040] 1. Material preparation: soybean meal 28kg, performance enhancer 2.0kg, diacetyl 15kg.

[0041] The specific synthesis process of the performance enhancer is as follows: 1) add 1 g of carboxymethyl chitosan, 4.5 g of polyethyleneimine, 0.5 g of polyvinyl alcohol and 120 g of water into a three-necked flask and stir well; 2) slowly add 20 g of water within 30 minutes. glutaraldehyde with a concentration of 5% in milliliters was vigorously stirred at 25° C. for 6 hours; 3) the obtained flocculent precipitate was repeatedly centrifuged and washed, and then freeze-dried and stored for later use.

[0042] 2. The specific preparation of soybean meal adhesive:

[0043] Add butanedione to 70kg of dispersion medium water, stir mechanically for 5 minutes, then add performance enhancer and continue to stir mechanically for 5 minutes, finally...

Embodiment 2

[0045] This embodiment provides a soybean meal adhesive of the present invention and a preparation method thereof. The specific preparation method is the same as in Example 1, except that the consumption of soybean meal is 30kg, and the consumption of performance enhancer is 5.0kg.

experiment example 1

[0065] In this experimental example, the adhesives obtained in the above examples and comparative examples were tested. All tests were performed in triplicate and averaged.

[0066] Solid content test: The determination of the solid content of the adhesive is carried out with reference to the national standard "Wood Adhesive and Its Resin Inspection Method" (GB / T 14074.5-2006) weighing method. Final data are the average of three parallel experiments. The specific experimental operation is as follows: Number the folded tin boxes respectively, and weigh them, and record the mass as m 0 , and then put the adjusted soybean meal adhesive into the corresponding numbered tinfoil box, weigh the total mass of the sample and the tinfoil box, and record it as m 1 . All samples were placed in an electric blast drying oven at 120 °C for solid content testing for 3 hours. After drying to constant weight, take out the dried glue block, weigh it, and record the mass as m 2 . The solid c...

technical field

[0001] The invention relates to the technical field of biomass adhesives, in particular to an antibacterial soybean meal adhesive and a preparation method and application thereof. Background technique

[0002] Precious wood resources are relatively scarce, and plantation forest resources are abundant. The use of plantation fast-growing wood to prepare wood-based panels through adhesives is the main raw material for furniture flooring and interior decoration in the living environment. The total output of wood-based panels is large, most of which are plywood products. . According to the average production of 9 cubic meters of wood-based panels per ton of adhesive, the consumption of adhesive for plywood is huge (solid content 50%), of which urea-formaldehyde resin and its modified products dominate the adhesive. Urea-formaldehyde resin adhesive is widely used in the wood industry due to its advantages of abundant raw materials, low price and good water solubil...

Examples

Embodiment 1

[0038] This embodiment provides a soybean meal adhesive of the present invention and a preparation method thereof.

[0039] Specifically:

[0040] 1. Material preparation: soybean meal 28kg, performance enhancer 2.0kg, diacetyl 15kg.

[0041] The specific synthesis process of the performance enhancer is as follows: 1) add 1 g of carboxymethyl chitosan, 4.5 g of polyethyleneimine, 0.5 g of polyvinyl alcohol and 120 g of water into a three-necked flask and stir well; 2) slowly add 20 g of water within 30 minutes. glutaraldehyde with a concentration of 5% in milliliters was vigorously stirred at 25° C. for 6 hours; 3) the obtained flocculent precipitate was repeatedly centrifuged and washed, and then freeze-dried and stored for later use.

[0042] 2. The specific preparation of soybean meal adhesive:

[0043] Add butanedione to 70kg of dispersion medium water, stir mechanically for 5 minutes, then add performance enhancer and continue to stir mechanically for 5 minutes, finally...

Embodiment 2

[0045] This embodiment provides a soybean meal adhesive of the present invention and a preparation method thereof. The specific preparation method is the same as in Example 1, except that the consumption of soybean meal is 30kg, and the consumption of performance enhancer is 5.0kg.

experiment example 1

[0065] In this experimental example, the adhesives obtained in the above examples and comparative examples were tested. All tests were performed in triplicate and averaged.

[0066] Solid content test: The determination of the solid content of the adhesive is carried out with reference to the national standard "Wood Adhesive and Its Resin Inspection Method" (GB / T 14074.5-2006) weighing method. Final data are the average of three parallel experiments. The specific experimental operation is as follows: Number the folded tin boxes respectively, and weigh them, and record the mass as m 0 , and then put the adjusted soybean meal adhesive into the corresponding numbered tinfoil box, weigh the total mass of the sample and the tinfoil box, and record it as m 1 . All samples were placed in an electric blast drying oven at 120 °C for solid content testing for 3 hours. After drying to constant weight, take out the dried glue block, weigh it, and record the mass as m 2 . The solid c...

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