Abstract: A composite polyimide separator and a preparation method thereof, and a secondary battery are described. The preparation method of the composite polyimide separator comprises: providing a porous polyamic acid film; subjecting a diamine aqueous solution and an acyl chloride organic solution to an interfacial polymerization reaction on a surface of the porous polyamic acid film to obtain a composite polyamic acid separator; and placing the composite polyamic acid separator in vapor of an imidization reagent for imidization treatment to obtain the composite polyimide separator. In the present application, by controlling the parameters of the interfacial polymerization reaction, a composite polyamic acid separator with a dense surface, a loose bottom, and an adjustable surface pore size can be obtained.

Abstract: An urogynecologic implant has a curved body that disperses force and reduces the ability of the urethra to expand into the pelvic floor under impulses of abdominal pressure in order to inhibit, reduce or prevent stress urinary incontinence.

Abstract: An urogynecologic implant has a curved body that disperses force and reduces the ability of the urethra to expand into the pelvic floor under impulses of abdominal pressure in order to inhibit, reduce or prevent stress urinary incontinence.