The invention and surface modification using a melt-kneading the clay with a linear polylactide as polylactide new clay / relates to polylactide nanocomposite and a manufacturing method thereof. More specifically, (1 ) preparing a modified clay by introducing the polylactide by ring-opening polymerization reaction in the layered clay having a hydroxyl group on the surface ; And (2) in (1) by melt-kneading a novel polylactide of high molecular weight prepared clay and clay / polylactide in a step for producing a nanocomposite ; new clay / polylactide nanocomposite prepared by the enhanced Mars represents the shear walls (shear thining).
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