Membrane spinning device and micro-nano material preparation method

Abstract

The invention relates to a membrane spinning device. The membrane spinning device is used for preparing polymer solution into a micro-nano material and comprises an air guide pipe, a high-pressure airflow generator, a spinning nozzle, a liquid supply device and a receiving device. The high-pressure airflow generator and the spinning nozzle are arranged at two ends of the air guide pipe respectively, the liquid supply device is connected with the spinning nozzle, and the receiving device is arranged on one side of the spinning nozzle. The spinning nozzle comprises a flared spinning cavity communicated with the air guide pipe, two ends of the spinning cavity are provided with an injection orifice and an air inlet, the injection orifice is communicated with the spinning cavity and faces the receiving device, and the diameter of the cross section of the injection orifice is smaller than that of the cross section of the air inlet. By adoption of the flared spinning cavity, airflow pressure is effectively increased, solution forms a stable liquid membrane in the spinning cavity, and high airflow velocity is achieved through low airflow pressure; by a negative-pressure box in a collection area, the problem of generation of a great quantity of instable micro-nano fibers difficult to collect under high-speed airflow action is effectively solved.

Description

technical field [0001] The invention relates to a membrane spinning device and a preparation method of micro-nano materials, in particular to a membrane spinning device and a preparation method of micro-nano materials which are assisted in batch production of micro-nano materials by using high-speed airflow. Background technique [0002] Due to their excellent mechanical properties, unique bionic properties and significant size effect, micro-nano fiber materials have been widely used in environmental engineering, medical and health, energy storage, composite templates and other fields. At present, the methods for preparing micro-nano materials mainly include centrifugal spinning technology, electrospinning technology, bubble electrospinning technology, air bubble spinning technology, etc. These methods have unique advantages in mass production of micro-nano materials, but Also there are many defectives respectively simultaneously simultaneously. [0003] Electrospinning tec...

AI Technical Summary

Problems solved by technology

Centrifugal spinning technology uses high-speed centrifugal force to stretch and refine the solution to produce a large number of micro-nano fibers. However, air-bubble spinning technology is difficult to control how to generate uniform air flow. Centrifugal spinning technology obtains the required solution viscosity. , causing the solution to be easily solidified, and most of the obtained fibers are above micron

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