Device for preparing nano fiber twisted structure

Abstract

The invention belongs to the technical field of nano fiber twisted structure or micro-nano rope preparation, and particularly relates to a device for preparing a nano fiber twisted structure by using a centrifugal electrostatic spinning technology. A metal rod is placed in the vertical direction at the central line of an annular aluminum foil collector, a metal rod bracket passes through the center of the annular aluminum foil collector and is used for supporting and stabilizing the metal rod, and the bottom end of the metal rod is butted against and linked with the output shaft of a motor; and the upper part of the metal rod is provided with a circular insulated turntable vertical to the axis of the metal rod, two spinning solution containers are placed on the upper lateral surface of the insulated turntable and symmetrical to the central line of the metal rod, and the spinning solution containers are provided with communicated needle openings aligned with a spinning nozzle of the annular aluminum foil collector. The spun fiber number is accurate and controllable, the twisted structure is good, the lapping sequence is high, the voltage is low, burrs are not caused, and the deviceis convenient for measuring the mechanical property of single fibers.

Description

Technical field: [0001] The invention belongs to the technical field of nanofiber stranded wire structure or micro-nano rope preparation, and in particular relates to a device for preparing a nanofiber stranded wire structure by centrifugal electrostatic spinning technology. Background technique: [0002] Due to their small diameter and large specific surface area, quasi-one-dimensional nanofibers often exhibit physical and chemical properties different from those of bulk and thin film materials, such as light, electricity, magnetism, and force, and have broad application prospects. At present, the preparation methods involving nanofibers mainly include physical / chemical vapor deposition, template method, chemical self-assembly method and electrospinning method, etc. Among them, electrospinning is a simple and easy method that can be directly prepared from polymers and composite materials. The continuous fiber method has the outstanding advantages of low equipment and experi...

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Problems solved by technology

[0003] At present, there are not many reports in the literature on the preparation of nanofiber strand structures by electrospinning technology. The existing reports are mainly through the improvement of the collection method to obtain the helically wound strand structure of multiple fibers. For example, Paul D.Dalton et al. (Polymer46 (2005) 611-614) obtained the stranded wire structure of nanofibers by using a double-ring collection-rotation method; Lu-Qi Liu et al. The stranded wire structure of nanofibers has been obtained by the method; in addition, the stranded wires can also be prepared by alternating electric field (Appl. However, these methods generally have outstanding shortcomings such as high spinning voltage, insufficient order of the overlapping fiber bundles before the formation of the strand structure, and poor controllability of the number of strand structure nanofibers.

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