▎ 摘　　要

NOVELTY - Polyimide precursor solution comprises modified silica microsphere, graphene oxide, diamine compound and dianhydride solution. USE - Polyimide precursor solution. ADVANTAGE - The polyimide precursor solution has better mechanical property and thermal property. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. a method for producing a polyimide precursor solution, which involves: (a) preparing modified silica microsphere; (b) preparing graphene oxide; (c)mixing the diamine compound with the dianhydride solution to obtain the polymer; and (d) adding the obtained modified silica microsphere and graphene oxide to the obtained polymer to obtain polyimide precursor solution; and 2. an apparatus for producing a polyimide precursor solution, which comprises: a first storage cabin (1), a second storage cabin (2), a mixing pipe (3) and a placing copper plate (4), where first storage cabin is arranged side by side with the second storage cabin, the mixing pipe is communicated with the first storage cabin and the second storage cabin respectively, and the placing copper plate is arranged at the bottom of the mixing pipe. DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of an apparatus for producing a polyimide precursor solution. First storage cabin (1) Second storage cabin (2) Mixing pipe (3) Placing copper plate (4)