Polytetrafluoroethylene (PTFE) membrane is widely used in medicine, clothing, chemical, electronics
and other fields. However, due to the highly symmetrical structure of the PTFE, the absence of reactive
radical, high crystallinity, low surface energy and poor surface wetting, these properties of PTFE affect
its compound with other materials. In order to improve the adhesion property of PTEF membrane, the
surface must be modified. In this paper, the surface melting deposition method was used to improve the
hydrophilicity of PTFE membrane. The PTFE membrane is immersed in a suspension of nano-TiO2, and
then deposited by melting at a high temperature. Sintering and depositing TiO2 particles on the surface
of the PTFE membrane. The molecules of the viscous substance enter the surface layer of the PTFE
membrane to form a modified surface layer. The interface strength of PTFE membrane is increased,
and the surface activity of PTEF membrane is increased, and the hydrophilicity of the PTFE membrane
is improved. It is easier that PTFE membrane is combined with other materials. The best treatment
process for the modification by melting deposition is as follows: the optimum treatment temperature is
350◦C, and the optimum treatment time is 30 min.