Polyvinyl alcohol modified water-resistant gypsum-polyamide 6 composite material and preparation method thereof

Abstract

The invention discloses a polyvinyl alcohol modified water-resistant gypsum-polyamide 6 composite material and a preparation process of the composite material. The preparation process is characterized by comprising the following steps: mixing a polyvinyl alcohol solution, a barium chloride solution and a sodium methylsilanolate solution so as to obtain a composite glue solution; adding the composite glue solution into gypsum powder, and uniformly stirring so as to obtain water-resistant gypsum; adding ethanol into a coupling agent for diluting, adding the water-resistant gypsum into a high-speed mixer, spraying the diluted coupling agent into the gypsum by adopting an atomization method, and performing vacuum drying so as to obtain coupling modified water-resistant gypsum; adding distilled water into polyvinylpyrrolidone so as to obtain a surfactant solution; adding multiwalled carbon nanotubes, stirring, performing ultrasonic treatment in an ultrasonic cell disruption system, and centrifuging so as to carbon nanotube dispersion; drying polyamide, adding the polyamide into the high-speed mixer, spraying white oil onto the surface of polyamide 6 under spray conditions, and mixing at a high speed; and adding the previous obtained materials, mixing at the high speed, adding the materials into a twin-screw extruder for granulating, drying, thereby obtaining the composite material.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a polyvinyl alcohol-modified water-resistant gypsum-polyamide 6 composite material and a preparation process thereof. Background technique [0002] The new ultra-high-strength cement-based material composite material is a key technology to realize the sustainable development of the construction industry because of its excellent compression resistance, bending resistance, tensile resistance, wear resistance, corrosion resistance and other super durability properties. For high-strength and ultra-high-strength cement-based materials, there are a series of outstanding problems such as high brittleness, large shrinkage, and severe early cracking. [0003] In his master's thesis "Research on Ultra-high-strength Cement-Based Composite Materials and Their Products", Zhang Yu used natural river sand, fly ash, mineral powder, silica fume and other mineral admixtures, as well as steel fib...

AI Technical Summary

Problems solved by technology

However, there are insufficient strength and mechanical properties