Bio-based intumescent flame retardant with dual functions of flame retardance and toughening as well as preparation method and application of bio-based intumescent flame retardant

Abstract

The invention relates to a bio-based intumescent flame retardant with dual functions of flame retardance and toughening and a preparation method of the bio-based intumescent flame retardant, and belongs to the technical field of flame retardance. The flame retardant comprises a bio-based core-shell flame retardant and natural latex coating the outer surface of the bio-based core-shell flame retardant, the bio-based core-shell flame retardant takes ammonium polyphosphate as a core, and the outer layer of the core sequentially comprises a first shell chitosan layer and a second shell bio-based acid layer. The bio-based intumescent flame retardant disclosed by the invention integrates flame retardance and toughening, and meanwhile, has relatively good flame retardance and toughening property;most of the raw materials come from biomass resources and return to nature after being degraded; non-biomass resource ammonium polyphosphate is degraded into a fertilizer, the preparation process iseasy to process, an organic solvent is not needed, and the fertilizer is non-toxic and pollution-free; and the bio-based intumescent flame retardant disclosed by the invention is added into bio-basedpolyester, especially polylactic acid, so that the impact property of PLA is greatly improved while the flame retardance is ensured.

Description

technical field [0001] The invention relates to a bio-based intumescent flame retardant with dual functions of flame retardancy and toughening and a preparation method thereof, belonging to the technical field of flame retardancy. Background technique [0002] Bio-based polyesters, such as polylactic acid (PLA), have been recognized as the most promising environmentally friendly materials to replace petroleum-based plastics. Especially under the influence of the global plastic ban, the growth of downstream demand is an inevitable trend. In recent years, the application of PLA has expanded from the field of disposable biodegradable materials to durable materials such as automotive interiors, electronic appliances, etc. In these high value-added fields, the fire safety performance of PLA is a must. However, PLA is a flammable material with a brittle quality and poor toughness. Flame retardancy of PLA is generally achieved by adding flame retardants. Among them, the flame re...

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Problems solved by technology

Among them, the flame retardant efficiency of inorganic flame retardants is low, often at the cost of deteriorating the mechanical properties of polylactic acid; although organic phosphorus flame retardants have high flame retardant efficiency, they are mostly liquids with poor thermal stability, and even some organic phosphorus flame retardants have high flame retardant efficiency. Phosphorus-based flame-retardant PLA is also prone to increase the yield of carbon monoxide (CO)

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