Production method of corn stover carbon fiber

Abstract

The invention relates to a crop straw utilization technique, particularly a production method of corn straw activated carbon fibers, which comprises the steps of melt spinning, oxidation stabilization and anoxybiotic carbonization. The method is characterized by comprising the following steps: pulverizing corn straws into fine powder, putting into a mashing cylinder, adding an adhesive, heating and mashing in the mashing cylinder to obtain a viscous fluid, heating for spinning to prepare grey yarn, drying the grey yarn, putting in an autoclave, boiling at 100-120 DEG C for 80-90 minutes, taking out, drying for setting, sending into a furnace, heating to 1100-1200 DEG C under anoxybiotic conditions, and carbonizing for 90-120 minutes to obtain the carbon fibers. The produced carbon fibers have the advantages of moderate strength, moderate elastic modulus, high internal porosity, large specific area, excellent adsorbability, excellent sterilization function and excellent infrared emission function, can be blended with cotton, wool and fluff to prepare the high-grade clothing fabrics with the functions of adsorption, sterilization, deodorization, infrared emission and the like, and are capable of greatly enhancing the added value of the corn straws, increasing the income of farmers and promoting the development of carbon fiber industry.

Description

technical field [0001] The invention relates to a crop stalk utilization technology, that is, a method for producing corn stalk carbon fiber. Background technique [0002] Carbon fiber, also known as carbon fiber, is an inorganic polymer fiber with a carbon content higher than 90%. Among them, those with a carbon content higher than 99% are called graphite fibers. Carbon fiber has small specific gravity, high strength, and no rust. It is a new material to replace steel and various mineral fibers. However, since human beings have not yet fully grasped the formation rules of carbon fibers, they cannot directly produce carbon fibers with pure carbon, and can only use carbon-containing organic substances such as polyacrylonitrile, pitch, coal tar and a few chemical products or petroleum products as raw materials to produce carbon fibers. Due to limited resources, carbon fiber products are expensive and can only be used in high value-added products such as aircraft, missiles, a...

AI Technical Summary

Problems solved by technology

The ignition point of corn straw is very low, and it is not easy to liquefy. It cannot be melted and made into silk like polyacrylonitrile, pitch, and coal tar, and it cannot provide raw silk materials for carbonization and graphitization. Therefore, there has been no report of using corn straw to produce carbon fiber.