Electromagnetic shielding tpu composite material for flexible robot joint and preparation method and application thereof

By combining the ice template method and the solvothermal method, a three-dimensional aerogel framework was constructed and iron tetroxide nanoparticles were generated in situ. This solved the problem of balancing electromagnetic shielding performance and flexibility in the application of TPU-based electromagnetic shielding materials in flexible robot joints. It achieved a shielding mechanism dominated by efficient absorption and dynamic stability, which is suitable for flexible robot joints.

CN121801298BActive Publication Date: 2026-06-05SHANDONG INOV POLYURETHANE
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG INOV POLYURETHANE
Filing Date
2026-03-12
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing TPU-based electromagnetic shielding materials are difficult to maintain excellent electromagnetic shielding performance, flexibility and thermal stability under dynamic deformation conditions in flexible robot joint applications. Furthermore, uneven filler distribution can easily lead to interface separation, making it difficult to achieve both shielding effectiveness and flexibility.

Method used

A three-dimensional porous aerogel framework was constructed by combining the ice template method and the solvothermal method. In-situ generated iron tetroxide nanoparticles were used as bonding points to form a TPU composite material with strong interfacial bonding. Fe3O4 solder joints were used to achieve a firm connection of carbon materials. Combined with magnetic loss and electrical loss mechanisms, a shielding mechanism dominated by efficient absorption was formed.

Benefits of technology

The material exhibits an electromagnetic shielding effectiveness of no less than 75 dB in the X-band, an absorption rate of no less than 78%, and an electromagnetic shielding effectiveness retention rate of no less than 96.8% after 1000 tensile strain cycles. The material demonstrates stable performance under dynamic conditions and is suitable for flexible robot joints.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure SMS_1
    Figure SMS_1
Patent Text Reader

Abstract

The application discloses an electromagnetic protection TPU composite material of a flexible robot joint and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The technical scheme is as follows: the composite material is composed of the following components in mass percentage: a polyester TPU matrix, graphene oxide, carboxylated multi-walled carbon nanotubes, ferroferric oxide and urea; the preparation method comprises the following steps: dispersing the graphene oxide, the carboxylated multi-walled carbon nanotubes and the urea in water to form a uniform slurry; unidirectionally freezing the slurry, freeze-drying to obtain a three-dimensional porous aerogel preform; immersing the preform in an iron salt ethanol solution to obtain a saturated aerogel; transferring the saturated aerogel to a high-pressure reaction container to perform a solvothermal reaction; washing, freeze-drying to obtain a three-dimensional network architecture; immersing a polyester TPU matrix solution; and solidifying and hot-pressing to obtain the TPU composite material. The electromagnetic protection TPU composite material can realize precise construction of a filler network and strong interface combination.
Need to check novelty before this filing date? Find Prior Art