Lignin composite material and preparation method thereof

Abstract

The invention provides a lignin composite material and a preparation method thereof. The lignin composite material is formed by mixing lignin, a high molecular compound, a fiber substance, chitin, a plasticizer, a compatibilizer, an antioxidant and a flame retardant, wherein the lignin composite material comprises the following components in percentage by weight: 2.5 to 56.4 percent of lignin, 10 to 70.5 percent of high molecular compound, 2.5 to 16.92 percent of flame retardant, 0.5 to 7.52 percent of plasticizer, 0.5 to 9.4 percent of compatibilizer, 0.05 to 1.88 percent of antioxidant, 1 to 10 percent of chitin and 5 to 4 percent of fiber. The composite material is formed by compounding the lignin serving as a base material with at least one high molecular compound and gathering by fusion through a polymer, so the composite material has the advantages of low water absorption, high mechanical performance and degradability.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a lignin composite material and a preparation method thereof. Background technique [0002] With the rapid development of the economy, the use of plastics is increasing, and it has penetrated into almost every aspect of people's lives. However, most of the currently used plastics are synthesized from petroleum resources and are non-degradable. Therefore, while consuming a large amount of petroleum resources, they also cause serious pollution to the environment. Natural polymers are rich in resources, renewable, and can be completely degraded. They are ideal substitutes for plastics, so they are welcomed by consumers and valued by governments of various countries. [0003] However, natural high molecular compounds generally have strong water absorption, so the composite materials made of natural high molecular compounds have strong water absorption...

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Problems solved by technology

[0003] However, natural polymer compounds generally have strong water absorption, so the composite materials made of natural polymer compounds have strong water absorption, and the water absorption will be further increased with the addition of plasticizers. , the mechanical properties of the composite material will drop significantly after contact with water; at the same time, because the natural polymer compound is easy to decompose at high temperature, the processing process is complicated and the process requirements are relatively harsh

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