The invention discloses a
polyelectrolyte nanometer
flame-retardant
coating by adoption of layer-by-layer
assembly and a preparation method thereof. The preparation method comprises following steps of: 1), preprocessing: putting and soaking base material into an acid solution and cleaning and
drying base material with water; 2), self-
assembly: putting and soaking pre-processed base material to a cationic
polyelectrolyte solution in order to from a layer of
ion membrane, taking out the layer of
ion membrane and cleaning the
ion membrane with water for
drying, putting and soaking the ion membrane into the cationic
polyelectrolyte solution in order to form an layer of anionic membrane, and cleaning the layer of anionic membrane with water and
drying; sequentially repeating above self-
assembly process for multiple times so that the polyelectrolyte nanometer
flame-retardant
coating is prepared by adoption of layer-by-layer assembly on the surface of the base material. The polyelectrolyte nanometer
flame-retardant
coating by adoption of layer-by-layer assembly and the preparation method thereof have following beneficial effects: the polyelectrolyte nanometer flame-retardant coating is green and eco-friendly and has a simple and feasible preparation method; damage to the internal structure of base material is avoided; high flame-retardant efficiency is obtained; and the preparation method is suitable for formation of flame-retardant coatings on material surfaces including fabric, wood, foam and plastics.