Nanoparticle-Polymer Fluorescent Composite via Pulse Laser Phase Transition

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Solution Overview

Problem

There is a lack of studies on the properties of magnetite-PMMA composites using light irradiation, and it is difficult to predict changes in magnetic nanoparticles and their surrounding environment due to photothermal and photochemical reactions, making it challenging to synthesize composites with nano-sized iron oxide nanoparticles and prepare new materials induced by photoreactions.

Innovation Solution

A method is developed to prepare a nanoparticle-polymer fluorescent composite by synthesizing magnetite (Fe3O4) nanoparticles, mixing them with an organic polymer and a solvent, and irradiating a pulse laser to induce a photothermal effect, changing the magnetite nanoparticles to Wustite and providing conjugated polymer characteristics to the polymer, resulting in a composite with fluorescence properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If magnetite-PMMA composite is used for thermo-sensitive drug delivery and cell separation, then magnetic separation capability is improved, but fluorescence characteristics are lost

Engineering Contradiction:

Improvemagnetic separation capabilityVSAvoidfluorescence characteristics

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies parameter changes by irradiating the magnetite-PMMA composite with a pulse laser, which changes the physical and chemical parameters of the material. This irradiation transforms the non-fluorescent magnetite-PMMA composite into a fluorescent composite while preserving its magnetic properties, thus resolving the contradiction between maintaining magnetic separation capability and achieving fluorescence characteristics.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The pulse laser irradiation induces a phase transition in the magnetite nanoparticles, converting them from a non-fluorescent phase to a fluorescent phase. This phase transition enables the material to exhibit both magnetic separation capability and fluorescence characteristics simultaneously, resolving the technical contradiction.

Inventive Principle:

Principle #36Phase transitions

2Ease of manufacture

If photothermal effect is induced by high-power high-energy laser, then fluorescence characteristics are generated, but prediction of characteristic changes becomes difficult

Engineering Contradiction:

Improvefluorescence characteristicsVSAvoidprediction accuracy of characteristic changes

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent employs preliminary action by conducting systematic experiments to establish the relationship between laser irradiation parameters and the resulting fluorescence characteristics. By pre-determining the optimal irradiation conditions and documenting the characteristic changes, the patent enables accurate prediction of material behavior under photothermal treatment, thus resolving the contradiction between generating fluorescence and predicting characteristic changes.

Inventive Principle:

Principle #10Preliminary action

3Ease of manufacture

If pulse laser irradiation is applied to magnetite nanoparticles, then fluorescence is generated, but control over reaction outcomes becomes challenging

Engineering Contradiction:

Improvefluorescence generationVSAvoidcontrol over reaction outcomes

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent applies feedback by systematically monitoring and adjusting laser irradiation parameters based on observed fluorescence intensity and material characteristic changes. This feedback mechanism enables precise control over the photothermal reaction outcomes, allowing reproducible generation of fluorescence while maintaining control over the reaction process, thus resolving the contradiction between fluorescence generation and reaction control.

Inventive Principle:

Principle #23Feedback

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 method creates a nanoparticle-polymer fluorescent composite that exhibits photothermal effects and fluorescence characteristics, enabling the use of magnetite nanoparticles in applications such as surface lighting and detection contrast agents with improved light transmission efficiency and color stability.

Implementation Method 1

irradiating a pulse laser to the nanoparticle polymer composite to change the magnetite (Fe3O4) nanoparticles to Wustite nanoparticles

Methodology Applied

Scientific EffectPhotothermal effect:

Implementation Method 2

change the magnetite (Fe3O4) nanoparticles to Wustite nanoparticles

Methodology Applied

Scientific EffectPhase change: Phase Change

Implementation Method 3

induces photothermal effect of nanoparticles with a high-energy high-power pulse laser

Methodology Applied

Scientific EffectPhotothermal conversion:

Implementation Method 4

providing conjugated polymer characteristics to the organic polymer

Methodology Applied

Scientific EffectPhotochemical reaction:

Data Source

PatentUS10689510B2Nanoparticle-polymer fluorescent composite and method of preparing the same

Publication Date: 2020.06.23 KOREA UNIV RES & BUSINESS FOUND

AI summary

Provided are a nanoparticle-polymer fluorescent composite and a method of preparing the same. The method includes preparing magnetite (Fe3O4) nanoparticles, mixing the magnetite (Fe3O4) nanoparticles, an organic polymer having an aliphatic carbon chain, and a solvent for dissolving the organic polymer to prepare a preliminary composite and drying the preliminary composite to form a nanoparticle polymer composite, and irradiating a pulse laser to the nanoparticle polymer composite to change the magnetite (Fe3O4) nanoparticles to Wustite nanoparticles and providing conjugated polymer characteristics to the organic polymer.