A kind of micro-nano fiber membrane containing high-density amine groups and its centrifugal spinning preparation method and application

Abstract

The invention discloses a preparation method and an application of a micro-nano fiber membrane containing high-density amido and centrifugal spun yarns of the micro-nano fiber membrane, belonging to the technical field of macromolecular novel materials. The preparation method comprises the following steps: dissolving a polymer containing high-density amido into pure water or a template solution to prepare a spinning solution, removing bubbles, injecting the spinning solution into a spinning container rotating at a high speed, enabling superfine spun yarns to flow to a mixed solidifying solution by adopting a centrifugation spinning method so as to rapidly form a micro-nano fiber membrane, and carrying out elution treatment on the micro-nano fiber membrane, and thus obtaining the micro-nano fiber membrane containing the high-density amido, of which the fiber diameters are relatively uniform, and the fiber arrangement is relatively regular. The material can be applied to the fields of carbon dioxide trapping, gas separation, molecular imprinting, oil-water separation and the like. In the method, with the centrifugation wet spinning for preparing the micro-nano fiber membrane, the problems that the chemical grafting modification method of the fiber is complicated in process, the electrostatic spinning method requires for high voltage, and the prepared fiber is low in orientation degree, and fibers prepared by the traditional wet spinning method are large in diameter, and consume a large amount of organic solvents, are solved.

Description

technical field [0001] The invention belongs to the technical field of new polymer materials, and specifically relates to a micro-nano fiber membrane containing high-density amine groups for carbon dioxide capture, gas separation, molecular imprinting and oil-water separation, and a centrifugal spinning preparation method and application thereof. Background technique [0002] In recent years, as the main component of greenhouse gases, the content of CO2 in the atmosphere is getting higher and higher, leading to serious environmental problems such as global temperature rise and sea level rise. The greenhouse effect has become one of the most serious environmental problems faced by human beings. To truly prevent global climate change, in addition to saving energy and reducing consumption, and developing renewable energy, CO2 emission reduction has become an important measure. CO2 capture and storage technology (CCS) has become a hot topic in international research in recent y...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of using a large amount of organic solvents in the traditional wet spinning method, and to solve the problem that electrospinning requires high voltage and cannot be used for high amine content and high functional groups such as chitosan, polyvinylamine, polyethyleneimine, etc. The problem of spinning the viscous substances of lumps and solutions, and solving the complicated process of preparing fibers with high amino group content through chemical grafting modification. For the first time, the centrifugal spinning method was used to prepare micro-nano fiber membranes containing high-density amino groups. The material has a high degree of fiber orientation, regular arrangement, uniform and thin diameter, the fiber membrane has excellent adsorption properties for carbon dioxide, high selective adsorption for bisphenol A, and good separation effect for some mixed gases and oil-water. Density amine-based micro-nanofibrous membrane

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