A spherical-surface phase transition coating for deep geothermal oil pipelines and a method for preparing the same

By introducing modified phase change microcapsules and MXene into the coating of deep-ground oil pipelines to form a three-dimensional interpenetrating network structure, the problem of integrating frictional heat management and corrosion protection is solved, realizing the coating's active thermal management, long-term protection and self-healing functions.

CN122127856APending Publication Date: 2026-06-02CHENGDU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU UNIVERSITY OF TECHNOLOGY
Filing Date
2026-04-20
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing coatings for deep-earth oil pipelines suffer from insufficient mechanical strength, weak adhesion, and an inability to effectively manage frictional heat and provide continuous corrosion protection in environments with frictional heat generation and corrosion.

Method used

By covalently combining modified phase change microcapsules with MXene materials to form a three-dimensional interpenetrating "sphere-surface" network structure, the phase change endothermic function of the microcapsules and the mechanical properties of MXene are used to synergistically solve frictional heat management and corrosion protection.

Benefits of technology

It achieves active thermal management of the coating, suppresses coating failure caused by frictional heat, provides long-term corrosion protection and self-healing ability, and improves the mechanical strength and durability of the coating.

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Abstract

This invention discloses a spherical-surface phase change coating for deep-earth oil pipelines and its preparation method. The steps are as follows: MXene powder and nanocapsules are modified with a modifier; the modified MXene powder and nanocapsules are mixed to undergo crosslinking or condensation reactions to form a composite filler with a three-dimensional interpenetrating "spherical-surface" composite structure; the composite filler is mixed and stirred with a binder and a curing agent to obtain a homogeneous coating; the homogeneous coating is sprayed onto the surface of a substrate, and after curing, a spherical-surface phase change coating with frictional heat management and corrosion protection functions is obtained. This invention constructs a spherical-surface phase change filler network by in-situ composite formation of phase change microcapsules loaded with corrosion inhibitors and MXene materials. When the coating is under frictional conditions, the microcapsule core material undergoes a solid-liquid phase change, alleviating coating failure caused by frictional heat accumulation. When the coating is damaged, some microcapsule shells rupture, allowing the loaded corrosion inhibitor to be continuously released, giving the coating an adaptive corrosion protection capability.
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