Gelatin-based carbon nanofibers and preparation method thereof

Abstract

The invention discloses gelatin-based carbon nanofibers and a preparation method thereof. The preparation method comprises the following steps that gelatin solid particles are added into deionized water, heating and stirring are carried out, then an iron (III) complex which can be dissolved in water and has a high stability constant is added into a gelatin aqueous solution to prepare a mixed spinning solution, and electrostatic spinning is carried out to prepare gelatin-based fibers; and pre-oxidation and carbonization treatment are performed on the spun gelatin-based fibers to obtain the gelatin-based carbon nanofibers. The preparation method has the advantages that gelatin is used as a precursor to prepare the carbon nanofibers, so that efficient utilization of resources is realized; andthe iron (III) complex with the high stability constant is used as an auxiliary agent, so that crosslinking agglomeration of ferric ions and gelatin molecules is prevented, and meanwhile the defect that gelatin fibers are melted into blocks at high temperature and the fiber morphology is difficult to maintain due to low glass-transition temperature is overcome. The preparation method is simple and environmentally friendly, and the obtained gelatin-based carbon nanofibers are smooth in surface, uniform in thickness and high in porosity and has certain application prospects in the fields of catalysis, adsorption and the like.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a gelatin-based carbon nanofiber and a preparation method thereof. Background technique [0002] As a one-dimensional nanomaterial, carbon nanofibers have broad application prospects in the fields of catalysis and adsorption because of their excellent physical and chemical properties, good electrical conductivity, and large specific surface area. Among the many preparation methods, electrospinning is one of the most convenient methods for preparing carbon nanofibers. By changing the composition of the spinning solution and spinning parameters, the morphology, surface defects and heteroatoms of carbon nanofibers can be adjusted. content. At present, there are many reports on the preparation of carbon nanofibers by electrospinning technology, usually using high polymers such as polyacrylonitrile, pitch and polyurethane as the precursor spinning liquid, but most of these high...

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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems existing in the prior art, and overcome the disadvantages of low glass transition temperature of gelatin fibers, high-temperature melting and difficulty in maintaining fiber morphology, the present invention provides a gelatin-based carbon nanofiber and a preparation method thereof, using gelatin as Precursors are used to prepare carbon nanofibers, realizing the efficient utilization of resources; using iron (Ⅲ) complexes with high stability constants as auxiliary agents not only prevents the cross-linking and coagulation of ferric ions and gelatin molecules, but also overcomes the problem of gelatin fibers Due to the low glass transition temperature, it is difficult to maintain the shape of the fiber when it melts into a block at high temperature; using specific electrospinning, pre-oxidation and carbonization processes, the gelatin-based carbon nanofiber material was successfully prepared

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