A composite material and a method for producing the same

By employing a staged mixing process that combines high-speed shearing and atomized spraying technology, the compatibility problem between waste wind turbine blade powder and resin matrix was solved, achieving uniform coating and efficient production of composite materials. This improved the mechanical properties and thermal stability of the materials while reducing environmental pollution.

CN122167858APending Publication Date: 2026-06-09CHINA ENERGY LONGYUAN ENVIRONMENTAL PROTECTION CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA ENERGY LONGYUAN ENVIRONMENTAL PROTECTION CO LTD
Filing Date
2026-03-30
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing technologies, the poor compatibility between waste wind turbine blade powder and resin matrix leads to uneven coating of coupling agent, affecting the mechanical properties and thermal stability of composite materials. Furthermore, traditional methods suffer from environmental pollution and low production efficiency.

Method used

The process combines high-speed shearing and mixing with atomized spraying technology to mix silane coupling agent and waste wind turbine blade powder in stages. The coupling agent is then uniformly sprayed through a ring sprayer and extruded and granulated in a twin-screw extruder. Temperature and torque sensors are used to monitor the mixing uniformity.

Benefits of technology

This method achieves uniform coating of coupling agent on powder surface, improves interfacial bonding and thermal stability of composite materials, reduces the use of organic solvents, and enhances production efficiency and the environmental friendliness of materials.

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Abstract

This invention provides a method for preparing composite materials and the composite materials obtained by this method. The method includes the following steps: 1) adding waste wind turbine blade powder to a mixing tank, shearing and stirring at 1000-3000 rpm, and simultaneously spraying a silane coupling agent to form a uniform modified layer on the powder surface, controlling the mixing temperature to below 85°C; 2) adding polyethylene and additives through the feed inlet of the mixing tank, stirring at 800-3000 rpm for 10-20 minutes, then switching to a low-speed stirring speed of 50-200 rpm to continue mixing, controlling the mixing temperature to below 85°C; 3) after the sensor detects that the stirring torque has stabilized, feeding the mixed material into a twin-screw extruder via a screw conveyor; and 4) setting the twin-screw extruder temperature between 140-180°C for extrusion, followed by cooling and granulation. This method enables more uniform material mixing, thereby improving the interfacial bonding strength, mechanical properties, and thermal stability of the composite material.
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