Dongguan PP filter element microfiltration membrane nuclear track etching method

PP filter core microfiltration membrane nuclear track etching method PP filter core microfiltration membrane nuclear track etching method is a new method for preparing microfiltration membrane by the dual action of physics and chemistry. By irradiating polymer materials (usually polyester and polycarbonate film materials) with high-energy charged particles (generally about 1MeV intensity), the polymer chain links where the particles pass through are broken to form incomplete tracks. Then, the etching reagent is used to react with the sensitive residual end group, so that the track continues to expand, and finally a columnar hole with uniform pore size is formed, thereby forming a straight through-hole microfiltration membrane. The process of preparing microfiltration membranes by nuclear track etching. The main factors affecting the pore structure of the microfiltration membrane are: the thickness of the film, the irradiation time of the high-energy charged particles, the concentration of the etching solution, the etching time, and the temperature. The thickness of the membrane is generally 5-15um, the pore size of the prepared microfiltration membrane is generally between 0.02-10um, and the porosity is generally about 10%. Because the membrane is thin, the fluid permeation rate is equivalent to the phase inversion method. This film generally has the characteristics of hydrophilicity, heat resistance, acid resistance, and good light transmission. Example Polycarbonate Microporous Membrane Material Acid Carbonate (PC) membrane. Corrosive agent Sodium hydroxide. Film-making process Heavy ions bombard the PC film, and the molecular bonds of the polymer film are broken to form small molecules and free radicals. These excited products continue to be damaged and form acidic compounds under the action of ultraviolet rays/peroxidants; acid compounds are under the action of alkaline solution. , to generate soluble salts, which are washed to form micropores.