Preparation and properties of layered double hydroxide-carboxymethylcellulose sodium/glycerol plasticized starch nanocomposites

► The Zn-Al LDHs were firstly prepared with CMC as the stabilizer. ► CMC exhibited the good stability of LDH in water because of hydrophilic CMC and the smaller LDH stack. ► The uniform dispersion of LDH-CMC fillers improved mechanical properties and water vapor barrier of GPS matrix.