Preparation method of carbon-montmorillonite composite membrane

The invention discloses a preparation method of a carbon-montmorillonite composite membrane. Polyimide excellent in performance and cheap montmorillonite serve as main raw materials; by means of a pillar bearing structure of montmorillonite, a carbon membrane porous channel structure and the size are regulated and established in the micro level by controlling the adding amount of montmorillonite, an intercalating agent, a pore-forming agent and the like and the carbonization conditions, and the carbon-montmorillonite composite membrane which has different average pore diameters and pore diameter distributions, is used for meeting different separation purposes, and is developed in porous structure, good in separation performance and high in cost performance is prepared. The preparation method aims at improving the cost performance of a gas separation carbon membrane, optimizing the carbon membrane porous channel structure and breaking the conflict relation between the gas separation permeability and selectivit