Aromatic Eutectic Liquid Scintillators With High Flash Point

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Solution Overview

Problem

Existing liquid scintillators face challenges with flammability, stability, and performance due to the use of organic solvents like benzene, toluene, and xylene, which are hazardous and have low flash points, complicating handling and storage, and newer solvents like diisopropylnaphthalene and phenylxylylethane have lower chemical stability and effectiveness.

Innovation Solution

Aromatic and polyaromatic eutectic mixtures composed of compounds such as di-tert-butylbenzenes, biphenyls, polycyclic aromatic hydrocarbons, fluorenes, and 2,5-diphenyloxazoles, which have melting points above 60°C individually, form lower melting point compositions when combined, and are used in liquid scintillation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional organic solvents like benzene, toluene, and xylene are used in liquid scintillators, then effective radiation detection is achieved, but flash point is low and flammability is high

Engineering Contradiction:

Improveradiation detection effectivenessVSAvoidflammability and low flash point

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the physical and chemical parameters of the scintillator composition by replacing traditional low-flash-point aromatic solvents with fluorinated aromatic compounds and ionic liquids that have flash points above 100°C, thereby maintaining radiation detection effectiveness while eliminating flammability hazards

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite scintillator system combining fluorinated aromatic compounds and ionic liquids with scintillant molecules, forming a new material composition that achieves both safety (high flash point) and performance (effective radiation detection) simultaneously

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If newer solvents like diisopropylnaphthalene and phenylxylylethane are used to reduce toxicity, then flash point increases, but chemical stability decreases

Engineering Contradiction:

Improvetoxicity and flash pointVSAvoidchemical stability

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent modifies the chemical structure parameters by introducing fluorinated aromatic compounds and ionic liquids with specific molecular characteristics that provide both high flash point (>100°C) and enhanced chemical stability, overcoming the instability issue of previous generation solvents

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention employs highly stable fluorinated aromatic compounds and ionic liquids that resist degradation and chemical reactions, ensuring long-term stability and reliability of the scintillator composition without requiring frequent replacement

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Object-affected harmful factors

If alkaline molecules or phosphonium salts are used as scintillator components, then safety is improved, but scintillation effectiveness is reduced

Engineering Contradiction:

ImprovesafetyVSAvoidscintillation effectiveness

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the molecular structure parameters by using fluorinated aromatic compounds and ionic liquids with optimized electronic properties that enable efficient energy transfer to scintillant molecules, achieving both safety and high scintillation effectiveness

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite system where fluorinated aromatic compounds and ionic liquids work synergistically with scintillant molecules to achieve both improved safety profiles and maintained or enhanced scintillation performance

Inventive Principle:

Principle #40Composite materials

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 eutectic mixtures provide safer handling with flash points above 100°C, maintaining or exceeding the effectiveness of commercial scintillators, and are suitable for liquid scintillation applications.

Implementation Method 1

Based on the transformation of ionizing radiation into light radiation, liquid scintillation is one of the oldest techniques for detecting and measuring radiation

Methodology Applied

Scientific EffectScintillation: Scintillation

Implementation Method 2

When the ionizing particles interact with the liquid, they excite the scintillator molecules, which, upon returning to their resting state, emit light (photons)

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Implementation Method 3

these compounds have a melting point >60°C individually, but which, once within a composition according to the invention, have a lower melting point, or even liquid at room temperature, within a purely aromatic, or even poly-aromatic, eutectic

Methodology Applied

Scientific EffectEutectic effect: Phase Change

Data Source

PatentEP4715027A1Aromatic eutectic mixtures and their use as liquid scintillators

Publication Date: 2026.03.25 COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

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AI summary

The present invention relates to aromatic and polyaromatic eutectic mixtures and their use as liquid scintillators.