Quantum dot composite material and preparation method thereof

The invention provides a quantum dot composite material and a preparation method thereof, and the preparation method comprises the following steps: (1) mixing a quantum dot solution with a mesoporous material, and carrying out ultrasonic air exhaust treatment to obtain a mixed solution; and (2) mixing the mixed solution obtained in the step (1) with a multi-branched-chain ligand material, stirring, and then adding a polymer material to obtain the quantum dot composite material, the multi-branched-chain ligand is introduced to fill gaps between quantum dots and a shell material, the quantum dots are fixed in a shell by utilizing steric hindrance, 'leakage 'is prevented, and the quantum dot composite material is prepared. The surface of the mesoporous material is coated with the hydrophobic polymer, so that holes can be further blocked, the shell compactness is improved, water and oxygen are isolated, and the stability is improved. 本发明提供了一种量子点复合材料及其制备方法，所述制备方法包括以下步骤：(1)将量子点溶液与介孔材料混合，经超声排空气处理得到混合溶液；(2)将步骤(1)得到的混