Lignin amido polyol and preparation method thereof

Abstract

The invention discloses a lignin amido polyol and a preparation method thereof. A chemical structural formula is in the specification. The preparation method comprises that: purified lignin serving as a raw material is subjected to Mannich reaction with formaldehyde and diethanol amine to form the lignin amido polyol and the lignin amido polyol is settled and separated by using hydrochloric acid. The preparation method has the advantages of simple process, mild reaction condition and the like. The prepared lignin amido polyol can be used as a catalyst carrier or a surfactant, and also can be reacted with isocyanate to synthesize a polyurethane material.

Description

Technical field The invention relates to a lignin amine-based polyol and a preparation method thereof, in particular to a method for preparing lignin amine-based polyol by Mannich reaction of lignin, formaldehyde and diethanolamine. Background technique Lignin (lignin) is a kind of abundant, renewable natural polymer compound in nature, which exists widely in plants. Lignin is mainly derived from woody biomass resources, especially papermaking waste liquid, which has the advantages of low price, degradability and environmental friendliness. Due to the complexity of its structure, the polydispersity of macromolecules and the inhomogeneity of physical and chemical properties, lignin has not been fully and effectively utilized so far. More than 95% of lignin has been burned or discharged Rivers waste resources and cause environmental pollution. With the deepening of human understanding of environmental pollution and resource crisis, the renewable and degradable properties of nat...

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Problems solved by technology

There are aromatic groups, phenolic hydroxyl groups, alcoholic hydroxyl groups, methoxyl groups, carbonyl group

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