Hydrophilic polytetrafluoroethylene membrane material containing sulfonic acid group telomer and preparation method of hydrophilic polytetrafluoroethylene membrane material

The invention discloses a preparation method of a hydrophilic polytetrafluoroethylene membrane material containing a sulfonic acid group telomer. According to the invention, a traditional PTFE microporous film surface modification method is broken through, and a method for physically blending a polytetrafluoroethylene telomer (A) containing a hydrophilic sulfonic acid group and a polytetrafluoroethylene homopolymer (B) in a macromolecular level is selected. The original fibril and node structure of the polytetrafluoroethylene membrane is not influenced, and a three-dimensional stable hydrophilic structure can be realized from micropores of the membrane material to the surface and to a membrane material substrate. The hydrophilicity of the polytetrafluoroethylene microporous membrane can be greatly improved, and the modification effect is kept long and stable. The modification method is simple and easy to implement, efficient, convenient and low in cost, cannot damage the structure of the PTFE membrane, enable