Migratory phase separation method for preparing core-shell structure nanofibers

Abstract

The invention relates to a migratory phase separation method for preparing core-shell structure nanofibers. The method includes dissolving fluoropolymer and associative polymer in an organic solution, heating and stirring till being dissolved completely, and mixing the two solutions by a certain mass proportion to obtain an electrostatic spinning solution; utilizing the electrostatic spinning solution to spin electrostatically, collecting fibers on a receiver, processing the obtained fibers in a vacuum oven with the constant temperature of 30 DEG C for 24 hours, and obtained the core-shell structure nanofibers. The invention aims to provide a preparing method of the core-shell structure nanofibers, the low surface of fluorine can allow the fluoropolymer to migrate to the surface rapidly during electric spinning, the core-shell structure nanofibers with clear phases are prone to forming, the preparing process is simple and easy to operate, the requirements on equipment is low, energy consumption is low, and preparing cost is also low.

Description

technical field [0001] The invention relates to a method for preparing nanofibers with a core-shell structure through migration-type phase separation. Background technique [0002] In a broad sense, nanofibers include ultrafine fibers with a fiber diameter of the order of nanometers, and fibers that are modified by filling nanoparticles into ordinary fibers. The larger specific surface area is the biggest characteristic of nanofibers, which makes them have larger surface energy and activity, resulting in small size effects, surface or interface effects, quantum size effects, macroscopic quantum tunneling effects, etc., in chemistry, physics ( Thermal, optical, electromagnetic, etc.) properties show excellent characteristics. The unique properties of nanofibers make them have huge market potential in the fields of membrane materials, filter media, catalysts, electronic products, optical devices, biomedicine and composite reinforcement materials. [0003] In order to meet th...

AI Technical Summary

Problems solved by technology

Chemical coating is a simple physical method, which can only be coated on the surface of the fiber membrane, and cannot be evenly coated on every fiber in the membrane; surface chemical bonding is to graft functional substances to the surface of the fiber A modification method that will affect the mechanical properties of the fibers during the implementation process, and it is difficult to modify the deep-layer fibers in the film; the coaxial electrospinning method uses coaxial electrospinning equipment to directly and continuously process functional nanofibers One method, this processing method has higher requirements on equipment and complicated operation

The blended electrospinning method is a simple physical mixing and spinning method of two or more materials. The operation is simple, but the phase separation process is required to be rapid, otherwise the boundary line of the core-shell structure will be blurred and the phase separation will not be complete.

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