Electrostatic spinning method for preparing directional nanofiber

Abstract

The invention discloses an electrostatic spinning method for preparing an aligned nanofiber, belongs to the technical field of nanofiber preparation, and relates to the electrostatic spinning method for preparing the aligned nanofiber. According to the electrostatic spinning method for preparing the aligned nanofiber, an auxiliary pole plate mutually parallel to a fixed receiving plate is adopted, and control over motion direction of a spinning solution jet flow is conducted to make the nanofiber form a space directional alignment between the fixed receiving plate and the auxiliary pole plate. The electrostatic spinning method for preparing the aligned nanofiber comprises the steps that firstly an electrostatic spinning device is installed, a spinning solution is prepared, a micro pump pushes the spinning solution to a spinning jet at a constant speed through a solution delivery tube, the nanofiber is drawn out at the position of the spinning jet, and fiber arrays with different cross directional nanofiber knitting angles are obtained by utilizing an additional collecting plate to change different angles. The electrostatic spinning method for preparing the aligned nanofiber has the advantages that fiber directional property is good, length is adjustable and space directional arranged fiber arrays can be obtained and the like, and spinning efficiency and spinning quality of the directional nanofiber are improved.

Description

technical field [0001] The invention belongs to the technical field of nanofiber preparation, and relates to an electrospinning method for preparing oriented nanofibers. Background technique [0002] Electrospinning technology was first proposed by Formhals in a series of patents in 1934. This technology can obtain nanofibers with high specific surface area quickly and at low cost, and has been widely used in recent decades. However, in early studies, it was found that the high-speed whipping and splitting process of the electrospinning jet was difficult to control, and the obtained nanofiber materials were disordered, which limited the application of nanofibers. For example, in the fields of tissue scaffolds, electronic devices, optical devices, etc., it is necessary to use aligned nanofibers. [0003] In order to prepare oriented nanofibers, researchers have developed a variety of fiber collection methods such as parallel plate electrode method, slope collection method, ...

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Problems solved by technology

However, the slope collection method and the parallel plate electrode method generally can only obtain oriented nanofibers distributed in a single plane, and the spinning and collection efficiency is low.

In order to solve the problem of large-area preparation of aligned nanofibers, the literature Yang D, Lu B, Zhao Y, et al. Fabrication of aligned fibrous arrays by magnetic electrospinning[J]. Adding two parallel magnets on the spinning receiving plate strengthens the directional arrangement of nanofibers containing magnetic particles and expands the directional arrangement space of fibers. However, this method is only applicable to the directional collection of magnetic nanofibers.

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