Liquid crystal alignment film, preparation method thereof and display device

The invention discloses a liquid crystal alignment film, a preparation method thereof and a display device. The liquid crystal alignment film is prepared from the following raw materials: methacrylic acid and methyl methacrylate. The surface of the liquid crystal alignment film has large polarity, the large polarity of the surface enables liquid crystal molecules to be vertically erected, and then vertical alignment is completed. The carboxyl contained in the liquid crystal alignment film can form stronger Van der Waals force with the base material, and can form chemical bonds with groups in the base material and the liquid crystal thin film, so that the binding force between the liquid crystal alignment film and the base material and the binding force between the liquid crystal alignment film and the liquid crystal thin film are further enhanced. 本申请公开了一种液晶配向膜、其制备方法及显示器件，所述液晶配向膜由包含以下的原料制备而成：甲基丙烯酸和甲基丙烯酸甲酯。液晶配向膜的表面具有较大的极性，表面较大的极性能够让液晶分子垂直立起，进而完成垂直配向。液晶配向膜中含有的羧基可以与基材形成更强的范德华力，同时可以与基材及液晶薄膜中的基团形成化学键，进一步增强液晶配向膜与基材