Shear Thickening Formulation Viscosity Enhancement
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Solution Overview
Problem
Current shear thickening materials do not achieve sufficient viscosity enhancement and rapid thickening rates, limiting their effectiveness in impact-resistant applications.
Innovation Solution
A shear thickening formulation comprising inorganic particles such as silicon oxide, aluminum oxide, or nano diamond, combined with polyethylene glycol, at a weight ratio of 3 to 4, and optionally enhanced with fillers like nanoclay or nanocellulose, which accelerates the thickening effect and maximizes viscosity at low shear rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional shear thickening materials are used, then the material can provide impact protection, but the viscosity enhancement is insufficient and the thickening rate is slow
Solution Approach 1:
The patent changes the chemical composition parameters of the shear thickening material by using specific ratios of inorganic particles (silica, alumina, silica-alumina) to organic plasticizer, and controlling the particle size distribution (D10, D50, D90 values) to achieve rapid viscosity enhancement and fast thickening rate
Solution Approach 2:
The patent employs a composite material system combining inorganic particles (silica, alumina, or silica-alumina) with organic plasticizer, where the interaction between these components produces the shear thickening effect with enhanced viscosity and rapid response
2Strength
If the shear thickening material is made stiffer for better protection, then the protection effect is improved, but the material loses flexibility and may drain
Solution Approach 1:
The patent creates a dynamic material system that adapts its properties in real-time: remaining flexible and moldable under normal conditions, then instantly hardening under impact to provide protection, and recovering to its original flexible state after energy release
Solution Approach 2:
The patent controls the physical and chemical parameters of the formulation, including the specific ratio of inorganic particles to organic plasticizer and the particle size distribution, to achieve the optimal balance between flexibility in the resting state and strength during impact
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 formulation achieves rapid energy absorption and impact protection, maintaining flexibility and preventing drainage, as demonstrated by enhanced viscosity and successful impact resistance tests in various composite materials.
Implementation Method 1
The shear thickening material can be applied in impact resistant and protective equipment. It may instantly absorb energy to be hardened to provide protection under high-speed impact.
Data Source
AI summary
A shear thickening formulation and composite material employing the same are provided. The shear thickening formulation includes inorganic particles and polyethylene glycol. The inorganic particles and the polyethylene glycol have a weight ratio of 3 to 4. The inorganic particles can be silica, aluminum oxide, silicon carbide, nano diamond, or a combination thereof.