Smart Optical Material Composition for Recycled Polypropylene

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Solution Overview

Problem

The challenge lies in effectively recycling polypropylene plastic waste while transforming it into valuable materials for laser and optoelectronic applications, as conventional recycling methods often compromise the material's physical properties and are not environmentally sustainable.

Innovation Solution

A method involving the synthesis of smart optical materials by mixing polypropylene with a solvent, a zinc salt, and rhodamine B, followed by polymerization using a peroxide, to create a composite material with dual optical bandgaps and improved impedance characteristics, suitable for laser and optoelectronic applications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of substance

If conventional recycling methods (mechanical recycling involving grinding, melting, and remolding) are used to recycle polypropylene, then plastic waste can be reused, but the material's physical properties are compromised

Engineering Contradiction:

Improveplastic waste recyclingVSAvoidmaterial physical properties

Core Design Contradiction:

Loss of substanceVSReliability

Solution Approach 1:

The invention transforms polypropylene through chemical parameter changes by converting it into a composite material with semiconductor properties. The chemical re-use process changes the material's fundamental properties, creating a smart optical material with dual bandgaps (1.4-1.5 eV and 1.8-1.9 eV) suitable for laser and optoelectronic applications, thereby preserving and even enhancing material value rather than compromising physical properties

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite smart optical material by combining polypropylene with other components through chemical re-use. This composite approach allows the recycled polypropylene to gain new functional properties (semiconductor characteristics, optical bandgaps) while maintaining structural integrity, resolving the contradiction between recycling and property preservation

Inventive Principle:

Principle #40Composite materials

2Strength

If polypropylene is used as a conventional plastic material, then it provides excellent mechanical properties and transparency, but it is resistant to biodegradation and accumulates as pollution

Engineering Contradiction:

Improvemechanical propertiesVSAvoidbiodegradation resistance

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The invention converts the harmful property of polypropylene (biodegradation resistance leading to pollution accumulation) into a beneficial feature. By chemically re-using the polypropylene to create smart optical materials with semiconductor properties, the material that would otherwise persist as pollution is transformed into a valuable functional material for laser and optoelectronic applications, eliminating the harmful aspect while preserving mechanical integrity

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If chemical re-use of plastic is implemented to break down plastics into monomeric forms, then recycling efficiency is improved, but the process complexity increases

Engineering Contradiction:

Improverecycling efficiencyVSAvoidprocess complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The invention applies preliminary action by directly utilizing polypropylene in its existing polymer form rather than breaking it down to monomers first. The chemical re-use process is designed to work with the polymer structure directly, incorporating it into the smart optical material composite, thereby achieving high recycling efficiency while avoiding the additional complexity of complete depolymerization and monomer purification steps

Inventive Principle:

Principle #10Preliminary action

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

This approach converts polypropylene into high-performance smart optical materials with dual bandgaps and semiconductor properties, suitable for laser and optoelectronic applications, while promoting waste reduction and environmental sustainability.

Implementation Method 1

the peroxide initiates polymerization of the 2-hydroxyethyl methacrylate to form poly(2-hydroxyethyl methacrylate)

Methodology Applied

Scientific EffectPolymerization: Photopolymerisation

Implementation Method 2

mixing rhodamine B and a peroxide into the second solution to form a third solution

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Data Source

PatentUS12110350B1Smart optical material and method of making thereof

Publication Date: 2024.10.08 IMAM MOHAMMAD IBN SAUD ISLAMIC UNIV

AI summary

A method of making a smart optical material (SOM) including mixing polypropylene in a solvent to form a first solution. The method further includes mixing a zinc salt in 2-hydroxyethyl methacrylate and heating it to form a second solution. The method further includes mixing rhodamine B and a peroxide into the second solution to form a third solution. The method further includes mixing the third solution into the first solution to form a reaction solution, wherein the peroxide initiates polymerization of the 2-hydroxyethyl methacrylate to form poly(2-hydroxyethyl methacrylate). The method further includes separating the SOM from the reaction solution. The SOM has at least two bandgaps, a first bandgap is from 1.4-1.5 eV, and a second bandgap is from 1.8-1.9 eV.