A physical modification method to improve the mechanical properties of electrospun micro-nanofibrous membranes

Abstract

The invention provides a physical modification method for promoting a mechanical property of an electrostatic spinning micro-nano fiber membrane. The method comprises the following steps: 1) transferring the electrostatic spinning micro-nano fiber membrane to an anti-adhesion substrate material and coating a layer of anti-adhesion substrate material above the electrostatic spinning micro-nano fiber membrane; and 2) placing the electrostatic spinning micro-nano fiber membrane acquired in the step 1) between two splints, wherein the temperature T of the splints is a temperature value more than or equal to a result of a glass state temperature Tg of the electrostatic spinning micro-nano fiber membrane minus 20 DEG C but less than a melting temperature Tm of the electrostatic spinning micro-nano fiber membrane, namely, T is more than or equal to Tg-20 DEG C but less than Tm, and the pressure between the two splints is arranged at 1-50MPa, and then processing for a certain period of time, thereby acquiring the physically modified electrostatic spinning micro-nano fiber membrane. According to the invention, the mechanical property of the electrostatic spinning micro-nano fiber membrane is promoted, the foreign body sensation in the fibrous membrane is reduced, the liquid wettability on the fibrous membrane surface is improved, the processing time is greatly shortened and the processing efficiency is increased.

Description

technical field [0001] The invention belongs to the field of preparation and modification of nanometer materials, and more specifically relates to a physical modification method for improving the mechanical properties of electrospun micronano fiber membranes. Background technique [0002] In recent years, electrospinning technology, as a simple and effective method for preparing fibers with diameters ranging from hundreds of nanometers to several microns, has attracted more and more attention, and has attracted extensive attention from researchers from all over the world. So far, nearly a hundred kinds of polymers have been used to prepare electrospun nanofibrous membranes by solution or melt spinning. The electrospun fiber membrane material has the characteristics of large specific surface area, high porosity, small pore size distribution, and good continuity. In addition, the fiber membrane is also easy to be functionalized and modified, which can meet various application ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a physical modification method for improving the mechanical properties of electrospun micro-nano fiber membranes, so as to solve the problems of poor mechanical properties and poor wettability of surface body fluids in the application process of electrospun micro-nano fiber membranes in the prior art , and the strong foreign body sensation in the body, and the existing physical modification methods generally have defects such as long processing time and large shrinkage rate of the fiber membrane.