Laser-Scribed Graphene PVC Pipe for Integrated Sensing

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Solution Overview

Problem

Existing PVC pipes lack electrical conductivity, limiting their applications in areas requiring conductive materials and necessitating separate electrical conduits, which can be cumbersome and prone to corrosion.

Innovation Solution

Integrate laser-scribed graphene conductive traces into the PVC pipes to impart electrical conductivity, allowing them to serve as conduits for electricity and sensors, with the traces being embedded, on the surface, or within the pipe wall, and optionally coated for protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate electrical conduits are installed, then electrical conductivity is improved, but device complexity and installation difficulty worsen

Engineering Contradiction:

Improveelectrical conductivityVSAvoidinstallation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the functions of the pipe and electrical conduit into a single integrated component. The PVC pipe itself becomes electrically conductive through the embedded graphene traces, eliminating the need for separate electrical conduits. This merging of functions reduces installation complexity, as workers no longer need to install additional conduits alongside the pipe - the pipe structure itself provides both fluid transport and electrical conduction pathways.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent makes the pipe multi-functional by enabling it to perform both its traditional fluid transport function and an additional electrical conduction function. The same PVC pipe structure that conveys water or gas now also serves as an electrical conduit, allowing for leak detection, structural monitoring, and other electrical sensing applications without requiring dedicated electrical infrastructure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If laser-scribed graphene traces are integrated into the pipe wall, then electrical conductivity is improved, but manufacturing complexity worsens

Engineering Contradiction:

Improveelectrical conductivityVSAvoidmanufacturing process simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by incorporating the graphene conductive traces during the pipe manufacturing process itself, rather than as a subsequent addition. The laser-scribing of graphene patterns is performed on the pipe wall during or immediately after pipe formation, ensuring the conductive network is integrated into the pipe structure from the outset. This preliminary integration simplifies the overall manufacturing workflow compared to post-manufacturing modifications.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces traditional mechanical methods of creating conductive pathways (such as embedding metal wires or conductive coatings) with a laser-based process. The laser-scribing technique uses optical energy to transform the PVC material into conductive graphene structures directly on the pipe wall, eliminating the need for mechanical wire embedding or chemical coating processes. This substitution simplifies the manufacturing process by using a precise, contactless laser process instead of complex mechanical assembly steps.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 conductive PVC pipes enable built-in leak detection, structural monitoring, environmental sensing, and communication capabilities, reducing the need for separate electrical conduits and enhancing durability and reliability.

Implementation Method 1

The tube structure is irradiated in a predefined trace pattern with the laser to induce precursor material reactions that convert the plastic precursor material into one or more laser-scribed graphene conductive traces

Methodology Applied

Scientific EffectLaser irradiation: Laser

Implementation Method 2

irradiated in a predefined trace pattern with the laser to induce precursor material reactions that convert the plastic precursor material into one or more laser-scribed graphene conductive traces

Methodology Applied

Scientific EffectPhotochemical reaction: Photopolymerisation

Data Source

PatentUS20260011467A1Active signal emission electrically conductive pipe

Publication Date: 2026.01.08 THE CURATORS OF THE UNIVERSITY OF MISSOURI

AI summary

An electrically conductive pipe comprises a tube structure having an electrically insulative wall with an interior surface and an exterior surface. Moreover, the electrically conductive pipe comprises a plurality of laser-scribed graphene conductive traces integrated at least partially into the electrically insulative wall. The laser-scribed graphene conductive traces are integrated into the tube structure such that they are integrated at least one of on the interior surface of the electrically insulative wall, on the exterior surface of the electrically insulative wall, and between the interior surface and exterior surface within the electrically insulative wall. The laser-scribed graphene conductive traces are formed onto or within the tube structure by irradiating the tube structure in a predefined trace pattern with a laser to induce reactions that convert the material of the tube structure into the laser-scribed graphene conductive traces. The electrically conductive pipe is configured for a wide array of applications.