Polyurethane fiber containing carbon-carbon double bond and preparation method thereof

Abstract

The invention discloses a polyurethane fiber and a preparation method thereof. The polyurethane fiber contains carbon-carbon unsaturated double-bond, the diameter is 200nm-1000nm, the number-average molecular weight is 15000-35000, and the mass percent content of a hard section in the polyurethane fiber is greater than 50%. The polyurethane fiber is prepared by using an organic solution A dissolved with the polyurethane containing the carbon-carbon double bond as the raw material and through an electric spinning method. Through the adoption of the method, the polyurethane containing the carbon-carbon double bond is directly used for preparing the superfine fiber through electric spinning, and the polyurethane fiber containing a functional group can be obtained without modifying after spinning. The polyurethane fiber obtained through the method disclosed by the invention is uniform in appearance and large in specific area, and since the molecular structure contains the carbon-carbon double-bond, the further modification of other functional group can be facilitated, and the polyurethane fiber has wide application prospect in the fields such as supported catalyst, sensing, separation, and biological medicines.

Description

technical field [0001] The application relates to an electrospinning preparation method of polyurethane superfine fibers containing carbon-carbon double bonds, which belongs to the field of materials. Background technique [0002] Ultrafine fibers have relatively large specific surface area, excellent surface properties and good mechanical properties, such as hardness and tensile strength, so they have received extensive attention. Electrospun microfibers have a wide range of uses due to their special size and structure, such as reinforcement materials, electrode materials, nanotube templates, conductive fiber composites, as well as sensors, tissue scaffolds, catalyst or enzyme carriers, filtration and separation, etc. Functional Materials. However, many electrospun fibers lack directly available functional groups, and they need to be modified, such as plasma pretreatment, for subsequent functional modification, which not only complicates the procedure, wastes resources, bu...

AI Technical Summary

Problems solved by technology

However, it is difficult to directly introduce carbon-carbon double bonds into high molecular weight polymers because of the high reactivity of carbon-carbon double bonds

Through molecular design and synthesis process control, a polyurethane material containing carbon-carbon double bonds in the molecular structure and a specific molecular composition is obtained. This polyurethane material containing carbon-carbon double bonds is prepared by electrospinning technology to obtain ultra-fine fiber-like functional carriers. materials, there are few reports

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