| abstract |
The invention provides a preparation method of a 3D porous cross-linked composite aerogel assembled by thermal bonding reinforced nanofiber, and particularly relates to a method for blending and electrospinning Polyacrylonitrile (PAN) and thermoplastic polymer with silicon dioxide (SiO) 2 ) The nanometer fiber is homogeneously dispersed in non-solvent, the dispersion is frozen, formed, dried and simply heat fixed, the thermoplastic polymer with relatively low smelting point on the fiber surface is hot melted and cooled to form in-situ bonding point, and the nanometer fiber forms isotropic component3D porous network structure of cloth with PAN nanofibers as resilient units and SiO 2 And the nano fibers are used as rigid supporting units, so that the high-resilience 3D porous cross-linked composite aerogel is assembled. The aerogel material has the excellent characteristics of high specific surface area, porous structure, high porosity, super hydrophobicity, ultralight weight, super elasticity and reusability, and has wide application prospects in the fields of energy, environment, medical sanitation, aerospace and the like. |