The invention discloses a
hollow fiber membrane and a preparation method of the
hollow fiber membrane. The
hollow fiber membrane is characterized in that a
mass percent formula of a membrane forming
system comprises the following components in percentage by weight (the sum of the components is 100%): 12-30% of a
polymer, 70-88% of an
organic solvent and 0-10% of an additive, wherein the
polymer is a general membrane forming
polymer or a modified product; the
organic solvent is a good
solvent of the polymer and can be mutually dissolved with water; the additive is a substance capable of reacting with water or a water solution to generate gas. The preparation method is a simplified solution
spinning method comprising the steps of: firstly preparing the polymer membrane forming
system according to the formula, putting the polymer membrane forming
system into an injection
syringe or other conveniently-extruded containers, extruding polymer membrane forming liquid from a
syringe needle or other pipelines under the pushing action of an
injection pump or the other containers, soaking the extruded polymer membrane forming liquid into pure water or a water solution which can be an
acid water solution or an alkali water solution according to different additives, solidifying and forming the membrane forming system by virtue of the water solution, meanwhile, reacting the additive with water, forming a cavity of the hollow
fiber membrane due to the expansion of the generated gas, and finally obtaining the hollow
fiber membrane.