Method adopting cornstalk to manufacture composite macromolecular plastic particles

Abstract

The invention discloses a method adopting cornstalk to manufacture composite macromolecular plastic particles, which comprises the following steps: (1) cornstalk powder preparation: adopting a smashing machine to directly smash the cornstalk, enabling the smashed cornstalk to pass through a sieve of 100-500 mesh, and obtaining the cornstalk powder for reservation; (2) mixing modification of raw materials: first soaking the cornstalk powder in NaOH water solution of 5mol / L, then washing the cornstalk powder until the cornstalk powder is neutral, removing non-cellulosic components, drying under the conditions of vacuum, fully mixing the cornstalk powder with macromolecular plastics, filler, an antioxidant, a lubricant and pigments in a vacuum high-speed stirring device after drying, and performing high-pressure spraying of ethanol solution containing an antibacterial agent and an modifying agent on the surface of the mixed materials with stirring for 5-8h under the conditions of vacuum at 90 DEG C to 120 DEG C; (3) obtaining of dry powder by cooling: placing the modified materials in the step (3) in a cooling mixer to perform cooling mixing stirring, discharging the materials when the temperature is about to be 40 DEG C, and obtaining the dry powder; and (4) granulation: sending the dry powder obtained in the step (3) to a granulating machine to perform extrusion granulation.

Description

technical field [0001] The invention relates to a method for producing composite polymer thermoplastic particles by using corn stalks in northeast China as raw materials. Background technique [0002] At present, the production process of polymer composite wood-plastic materials only pays attention to the mixing or reuse of several materials, and the improvement of basic mechanical properties, and does not fully consider the compatibility and interface bonding of various materials, interface bonding ability and various materials. The diffusion and penetration of various materials at the interface cannot ensure that the plant fibers can be fully dispersed in the polymer resin, thus affecting the affinity and bonding strength of the wood / plastic interface, resulting in the mechanical properties and other factors of the polymer composite wood-plastic material. Use performance is low. [0003] Patent 200610070215.6 discloses a method of using agricultural plant straw to produce...

AI Technical Summary

Problems solved by technology

[0002] At present, the production process of polymer composite wood-plastic materials only pays attention to the mixing or reuse of several materials, and the improvement of basic mechanical properties, and does not fully consider the compatibility and interface bonding of various materials, interface bonding ability and various materials. The diffusion and penetration of various materials at the interface cannot ensure that the plant fibers can be fully dispersed in the polymer resin, thus affecting the affinity and bonding strength of the wood / plastic interface, resulting in the mechanical properties and other factors of the polymer composite wood-plastic material. low performance

[0003] Patent 200610070215.6 discloses a method of using agricultural plant straw to produce polymer composite wood-plastic materials. The method is to crush and dry the straw to obtain straw powder, impregnate the straw powder, and then dry to obtain modified straw powder. The modified straw powder and other raw materials mainly thermoplastic resin are mixed and cooled at high speed to obtain a dry powder, the dry powder is extruded and granulated, and then the granulated material is extruded and shaped to obtain a polymer compound Wood-plastic material, but it has the following disadvantages: Due to the different content of cellulose, hemicellulose and lignin in each type of agricultural plant, the surface treatment of straw powder with a uniform dose of modifier improves production on the one hand. Cost (because the price of various modifiers is relatively high), on the other hand, it will also cause environmental pollution, because various modifiers are mostly chemical products, and if they are incinerated or reused, they will cause environmental pollution

Its disadvantages are: first, there are many pretreatment processes for cotton stalks, which increases production costs; second, the overall production cycle is relatively long, which reduces production efficiency