High-strength high-temperature-resistant antistatic PA10T composite material and preparation method thereof

By bridging CNTs and graphene with IPDI, an interpenetrating conductive network was constructed in the PA10T composite material, solving the problems of nanofiller dispersion and interfacial bonding. This resulted in improved high-efficiency antistatic properties and mechanical properties, while maintaining the material's thermal stability.

CN122011376APending Publication Date: 2026-05-12FUZHOU UNIV
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Patent Information

Application Number
CN202610375815.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-25
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve uniform dispersion and interfacial bonding of nanofillers in polymers, leading to compromised antistatic and mechanical properties. This is particularly true in PA10T materials, where it is difficult to construct a stable and efficient conductive network.

Method used

Using isophorone diisocyanate (IPDI) as a composite chain extender, carbon nanotubes (CNTs) and graphene (G) are covalently bridged. A stepwise controllable synthesis process is designed to form a structure of "first grafting CNTs, then bridging graphene", thus constructing an interpenetrating network of one-dimensional and two-dimensional nanomaterials.

Benefits of technology

The nanofiller was uniformly dispersed and strongly bonded to the PA10T matrix, which significantly improved the antistatic and mechanical properties of the material, reduced the percolation threshold, and improved the thermal stability and electrical conductivity of the material.

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Abstract

The invention discloses a high-strength high-temperature-resistant antistatic PA10T composite material and a preparation method thereof, a composite chain extender IPDI-CNT-G is formed by covalently bridging carboxylated carbon nanotubes and aminated graphene by utilizing activity difference of two isocyanate groups of isophorone diisocyanate through a step-by-step controllable reaction. The composite chain extender is applied to the in-situ polymerization process of PA10T, the IPDI component of the composite chain extender can participate in the end group reaction of polyamide to realize chain extension, and CNT and graphene are firmly introduced and fixed in a polymer matrix in a chemical bond form to construct an efficient and stable three-dimensional hybrid conductive network. The prepared PA10T composite material keeps excellent mechanical properties and heat resistance, the volume resistivity can be reduced to 1.0 * 10 < 6 >-109 omega.cm magnitude, and the PA10T composite material has a lasting and reliable antistatic function, and is especially suitable for the fields of precision electronic and electrical appliances and automobile industry with strict requirements on electrostatic protection.
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