Preparation method of environment-friendly modified sesame albumen glue mucilage

Abstract

The invention discloses a preparation method of environment-friendly modified sesame albumen glue mucilage, which comprises the steps of firstly, dissolving sesame cake meal with a sodium hydroxide solution, centrifuging, precipitating with a hydrochloric acid solution, adjusting to be neutral, freeze-drying, crushing and sieving to obtain sesame residue albumen, chopping fresh citrus plant peel, performing ultrasonic extraction to obtain peel polyphenol extract, then obtaining a sesame residue albumen modified solution by using montmorillonite, sodium dodecyl benzene sulfonate, Ca (OH) 2, NaOH and modified sesame residue albumen, finally dropwise adding the peel polyphenol extract into the sesame residue albumen modified solution, and stirring to obtain environment-friendly modified sesame albumen glue mucilage. According to the prepared environment-friendly modified sesame residue albumen glue mucilage, the peel polyphenol extract is used for improving the bonding strength and water resistance of the sesame residue albumen glue mucilage, meanwhile, the corrosion resistance of the sesame residue albumen glue mucilage is enhanced, no chemical preservative is added, environmental protection and safety are achieved, the economic value of sesame cake meal by-products is improved, and the application range of the sesame cake meal by-products is widened.

Description

technical field [0001] The invention relates to the field of plant protein modification, in particular to a preparation method of an environmentally friendly modified sesame protein glue. Background technique [0002] In 2019, the output of wood-based panel products in my country has reached 325 million m 3 , Adhesives are essential in the wood-based panel industry. Today, wood adhesives are divided into aldehyde-based adhesives and environmentally friendly adhesives. Among them, "formaldehyde-based adhesives" (such as urea-formaldehyde resins, phenolic resins, and melamine-formaldehyde resins) are relatively low in cost and proficiency in production processes. There are advantages, but this type of adhesive mainly uses non-renewable petrochemical resources as raw materials. During production, transportation and application, harmful substances such as free aldehydes and free phenols will be produced. When these harmful substances reach a certain concentration, they will har...

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Problems solved by technology

[0004] The production and consumption of sesame in our country ranks first in the world. Most of the sesame is used to make oil. As a by-product of sesame oil, sesame cake is mostly used for animal feed and crop fertilizer. The meal is rich in a large amount of protein, and these sesame proteins are not fully utilized, which makes the economic value of sesame protein small and the additional output value low, resulting in a waste of sesame protein resources

The patent CN109825247A provides a compound modified sesame protein adhesive and its preparation method, using urea and metal oxides to carry out compound modification on sesame protein to obtain a green adhesive with good adhesive performance and waterproof performance. The application of sesame protein in wood adhesives has been broadened. However, this research has not improved its antiseptic performance, and its service life is short. In addition, the secondary structure of sesame protein will be destroyed if the concentration of urea is too high, and water molecules will interact with excess Urea forms hydrogen bonds, which accelerates the penetration rate of water molecules into the sesame protein, but reduces the water resistance and bonding strength of the adhesive.

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