A kind of flame retardant, flame retardant PLA composite material and preparation method thereof

Abstract

The present invention relates to the technical field of flame retardant design, in particular to a flame retardant, a flame retardant PLA composite material and a preparation method thereof. The flame retardant has the following general structural formula: wherein, NH 2 ‑R‑COOH is the basic amino acid of biomass, Si(OH) 3 ‑R' is the hydrolyzed silane coupling agent. The preparation method of the flame retardant comprises the following steps: (1) adding the phytic acid aqueous solution dropwise to the biomass basic amino acid aqueous solution, adjusting the pH to 6-8, adding the first organic solvent to obtain a precipitate, drying, Product A is obtained; (2) the silane coupling agent is hydrolyzed in the second organic solvent to obtain the hydrolyzed silane coupling agent, and the hydrolyzed silane coupling agent is added to the product A, and the reaction is heated under stirring, and the Filter, wash and dry to obtain the flame retardant. The invention can effectively improve the compatibility between the flame retardant and the PLA material by modifying the surface of the all-bio-based flame retardant with a coupling agent, and can effectively take into account both excellent mechanical properties and excellent flame retardancy, especially at low dosages. performance.

Description

A kind of flame retardant, flame retardant PLA composite material and preparation method thereof technical field The present invention relates to flame retardant design technical field, relate in particular to a kind of flame retardant, flame retardant PLA composite material and preparation thereof. preparation method. Background technique Polylactic acid (PLA) is a biodegradable polymer that can be obtained from renewable resources such as sugar, corn starch, etc. Renewable resin produced in . PLA, as a commercialized bio-based polymer material, has good biocompatibility high performance, mechanical properties, biodegradability and low toxicity, it has full application potential in the electronics, automotive and construction industries. However PLA is highly flammable and has a potential fire threat, which greatly limits the practical application of PLA in industries with high flame retardancy requirements. Therefore, the flame retardant modification of polylac...

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Problems solved by technology

[0005] In order to overcome the problems that the traditional flame retardant for PLA modification is not environmentally friendly, the addition amount is large, and its mechanical properties will be deteriorated, the present invention provides a flame retardant with good compatibility, environmental friendliness and excellent mechanical properties.

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