Method for preparing organic-inorganic hybrid microcapsule

A method for preparing an organic-inorganic hybrid microcapsule comprising the steps of:

• a first step of preparing a first continuous-phase solution containing inorganic nanoparticles and a second continuous-phase solution containing a polymer precursor 1 for reinforcing an outer wall;
• a second step of preparing a dispersed-phase solution containing a polymer precursor 2 which reacts with the polymer precursor 1 or containing an active ingredient and the polymer precursor 2;
• and
• a third step of forming a picketing emulsion by adding the dispersed-phase solution to the first solution, and then forming an outer wall of the capsule through interfacial polymerization by adding the second solution,
• wherein the outer wall of the capsule comprises i) at least one polymer selected from the group consisting of polyamide, polyurethane, polyurea, polyester and poly(β-amino ester), and ii) inorganic nanoparticles;
• and
• the polymer precursor 1 for reinforcing the outer wall and the polymer precursor 2 each independently contain at least one precursor for forming a polymer selected from the group consisting of polyamide, polyurethane, polyurea, polyester, and poly(β-amino ester),
• wherein the polymer precursor 2 is at least one selected from the group consisting of a compound containing two or more acid chloride structures represented by the Chemical Formula 3, and a compound containing two or more chloroformate structures represented by the following Chemical Formula 5:
• (in Chemical Formula 3, each R3 may independently comprise C1 to C50 alkylene, a C3 to C60 cyclic hydrocarbon group, or C1 to C50 alkylene and a C3 to C60 cyclic hydrocarbon group having or not having at least one acid chloride (-COCl) or at least one heteroatom)
• (in Chemical Formula 5, each R5 may independently comprise C1 to C50 alkylene, a C3 to C60 cyclic hydrocarbon group, or C1 to C50 alkylene and a C3 to C60 cyclic hydrocarbon group having or not having at least one chloroformate (-OCOCl) or at least one heteroatom).