Click-Active Janus Particles for Multiphasic Emulsion Stabilization

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Solution Overview

Problem

Current methods for large-scale synthesis of Janus particles do not allow for the fabrication of particles with diverse compositions, limiting their utility in stabilizing multiphasic fluid mixtures effectively.

Innovation Solution

A method involving the combination of seed particles with a monomer emulsion to produce click-active Janus particles, followed by polymerization and functionalization using click chemistry reactions, enabling the creation of particles with diverse compositions and enhanced properties such as pH-responsiveness and improved adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If current large-scale synthesis methods are used, then production efficiency is improved, but composition diversity is limited

Engineering Contradiction:

Improvelarge-scale synthesis efficiencyVSAvoidcomposition diversity

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The synthesis process is divided into distinct stages: seed particle formation, monomer swelling, and polymerization. This segmentation allows independent optimization of each stage for both scale and composition control

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The Janus particle synthesis platform is designed to produce multiple particle types with diverse compositions using a universal core methodology, enabling one system to serve multiple compositional requirements

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of manufacture

If homogenous particles are used, then manufacturing simplicity is maintained, but interfacial stabilization performance deteriorates

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidinterfacial stabilization performance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The particle structure is designed with distinct hemispheres having different compositions and properties (hydrophobic vs. hydrophilic), allowing each region to perform its specific function while maintaining overall particle integrity and ease of manufacture

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Janus particles are constructed as composite structures combining different materials (e.g., polystyrene and poly(methyl methacrylate)) in a single particle, achieving superior interfacial stabilization that neither homogeneous material could provide alone

Inventive Principle:

Principle #40Composite materials

3Reliability

If diverse composition particles are fabricated, then emulsion stabilization capability is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveemulsion stabilization capabilityVSAvoidmanufacturing process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Seed particles are pre-formed with controlled properties before the swelling and polymerization steps, allowing subsequent processing to focus only on creating the Janus structure rather than forming particles from scratch, thus reducing overall manufacturing complexity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The monomer emulsion acts as an intermediary medium that enables controlled composition differentiation during swelling, simplifying the manufacturing process by using a self-organizing system rather than complex multi-step assembly

Inventive Principle:

Principle #24Intermediary (Mediator)

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 allows for the production of click-active Janus particles that can stabilize various multiphasic mixtures, change wetting properties, and enhance adhesion between different surfaces, offering improved performance in emulsion stabilization and phase inversion.

Implementation Method 1

polymerizing the monomer-swollen seed particles to obtain click-active Janus particles

Methodology Applied

Scientific EffectPolymerization:

Implementation Method 2

the adsorption energy of a spherical Janus particle to an oil-water (OW) interface can be as large as three times that of its homogenous counterpart

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 3

functionalizing the click-active Janus particles to form composite Janus particles using one or more click chemistry reactions

Methodology Applied

Scientific EffectClick chemistry reactions: Chemical Bonding

Data Source

PatentUS11623974B2Click-active Janus particles and methods for producing and using the same

Publication Date: 2023.04.11 THE TRUSTEES OF THE UNIV OF PENNSYLVANIA

AI summary

A method for producing a click-active Janus particle includes combining seed particles with a monomer emulsion to obtain monomer-swollen seed particles; and polymerizing the monomer-swollen seed particles to obtain click-active Janus particles. A method for functionalizing a click-active Janus particle includes combining seed particles with a monomer emulsion to obtain monomer-swollen seed particles; polymerizing the monomer-swollen seed particles to obtain click-active Janus particles; and functionalizing the click-active Janus particles using one or more click chemistry reactions.