Composite Pipe Lining Material for Corrosion and Barrier Resistance
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Solution Overview
Problem
Offshore oil and gas pipelines face degradation due to high temperature, high pressure, and corrosive environments, leading to frequent leaks and bursts, necessitating a material with enhanced corrosion resistance, barrier properties, mechanical properties, and temperature resistance.
Innovation Solution
A modified thermoplastic polymer composite material for nonmetal flexible composite pipes, comprising 89.5-99.4wt% polymer matrix, 0.5-10wt% inorganic particles, and 0.1-0.5wt% antioxidant, with surface-modified inorganic particles like nano silicon dioxide, carbon nanotubes, and graphene oxide uniformly dispersed to improve corrosion resistance, barrier properties, and temperature resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel is used for transportation pipelines, then mechanical strength and pressure resistance are improved, but corrosion resistance deteriorates due to environmental conditions
Solution Approach 1:
The invention uses a composite material consisting of polymer matrix (such as polyethylene, polypropylene, or their copolymers) combined with inorganic particles (such as glass beads, ceramic particles, or metal oxides) to create a flexible composite pipe that provides both mechanical strength and corrosion resistance. The composite structure allows the polymer to provide flexibility and corrosion resistance while the inorganic particles provide enhanced mechanical strength and pressure resistance.
2Device complexity
If single material is used, then material composition is simple, but it cannot meet requirements for corrosion resistance, barrier properties, mechanical properties and temperature resistance simultaneously
Solution Approach 1:
The invention employs a multi-component composite material system where a polymer matrix is combined with inorganic particles, antioxidants, and optionally other functional additives. This composite approach allows each component to contribute specific properties: the polymer provides flexibility and basic mechanical properties, inorganic particles enhance strength and barrier properties, and antioxidants improve temperature resistance and durability, achieving comprehensive performance requirements.
Solution Approach 2:
The invention incorporates different components with specific functions at different levels of the material structure. For example, inorganic particles are distributed within the polymer matrix to provide localized reinforcement and barrier properties, while antioxidants are incorporated to provide localized protection against oxidative degradation. This local quality approach allows each component to optimize specific properties where needed.
3Reliability
If nanoparticles are added to polymer matrix, then corrosion resistance and barrier properties are improved, but uniform dispersion of particles becomes difficult
Solution Approach 1:
The invention uses surface treatment agents or coupling agents as intermediaries between the inorganic particles and the polymer matrix. These intermediaries improve the interfacial adhesion and compatibility between the hydrophilic inorganic particles and the hydrophobic polymer matrix, preventing particle aggregation and ensuring uniform dispersion. The surface treatment modifies the particle surface properties to match the polymer matrix, facilitating homogeneous distribution throughout the composite material.
4Strength
If complex liquid with reinforced nanoparticles is used as in prior art, then bonding enhancement is achieved, but barrier properties and particle dispersion are not considered
Solution Approach 1:
The invention creates a comprehensive composite material system that goes beyond simple bonding enhancement by incorporating polymer matrices with specific barrier properties (such as polyethylene or polypropylene) combined with inorganic particles. This composite structure simultaneously provides bonding strength, barrier properties against corrosion and permeation, and improved mechanical properties, addressing multiple performance requirements rather than focusing solely on bonding enhancement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly enhances corrosion resistance, barrier properties, mechanical properties, and temperature resistance of the lining material, reducing the likelihood of leaks and bursts while simplifying the composition and preparation process, thus lowering costs and improving repair efficiency.
Implementation Method 1
through surface modification, nanoparticles are uniformly dispersed in a polymer matrix
Implementation Method 2
0.1-0.5wt% of an antioxidant
Data Source
AI summary
The present invention relates to a lining material of a nonmetal flexible composite pipe and a preparation method. The lining material consists of the following components in the following proportions: 89.5-99.4wt% of a polymer matrix, 0.5-10wt% of inorganic particles and 0.1-0.5wt% of an antioxidant. The preparation method comprises the following steps: (1) preparation of raw materials: raw materials are weighed in a mass ratio for later use; (2) compounding and plasticizing: inorganic particles, a polymer matrix and an antioxidant are added into a twin-screw extruder or a mixer at an extruding or mixing temperature of 190-360°C, and extruded and cooled for later use; and (3) pelleting: the materials after the compounding and plasticizing obtained in the step (2) are pelleted in a pelletizer to obtain the lining material of a nonmetal flexible composite pipe. In the present invention, through modification, inorganic particles are uniformly dispersed in a polymer matrix, thereby improving the corrosion resistance, barrier properties, mechanical properties and temperature resistance of a lining material of a nonmetal flexible composite pipe.