Star-like Titanium Oxide Powder Adhesion via Surface Treatment
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Solution Overview
Problem
Paint and cosmetic materials containing metal oxide powders, such as titanium oxide, zinc oxide, or zirconium oxide, lack sufficient adhesiveness to coated substances, limiting their application effectiveness.
Innovation Solution
Development of metal oxide powders with star-like titanium oxide particles, surface-treated for enhanced adhesiveness, combined with a dispersion liquid and cosmetic materials, ensuring excellent light-scattering properties and improved adhesion to coated surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal oxide powder (titanium oxide, zinc oxide, or zirconium oxide) is used for its high refractive index and ultraviolet-shielding properties, then light-scattering properties are improved, but adhesiveness to coated substances deteriorates
Solution Approach 1:
The patent applies surface treatment agents as intermediary substances between the metal oxide particles and the coated substrate. These surface treatment agents modify the particle surfaces to enhance adhesiveness while preserving the light-scattering properties of the metal oxide particles. The surface treatment creates a bridge that allows the particles to adhere better to coated substances without compromising their optical functionality.
Solution Approach 2:
The patent modifies physical and chemical parameters of the metal oxide particles through surface treatment. By changing surface chemistry parameters (such as surface energy, surface charge, and surface functional groups) through treatment with specific agents, the particles gain improved adhesiveness while maintaining their refractive index and light-scattering capabilities.
2Illumination intensity
If star-like titanium oxide particles are used to enhance light-scattering power, then optical properties are improved, but manufacturing complexity increases
Solution Approach 1:
The star-like shape can be understood as segmented protrusions radiating from a central core. This segmentation approach allows the particles to scatter light more effectively from multiple directions while the manufacturing process divides the formation into sequential steps (nucleation, growth, and shape development) that can be controlled independently in the hydrothermal synthesis process.
Solution Approach 2:
The patent employs preliminary action by pre-forming nuclei with specific crystal orientations and then controlling their subsequent growth under hydrothermal conditions to develop the star-like morphology. The surface treatment is also applied as a preliminary action before final application, ensuring particles are pre-prepared with optimal adhesiveness properties.
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 metal oxide powders with star-like titanium oxide particles provide superior light-scattering properties and excellent adhesiveness to coated surfaces, enhancing the performance of dispersion liquids and cosmetic materials.
Implementation Method 1
star-like titanium oxide particles described in Patent Literature 1 and 2 have a power of scattering visible light through near-infrared light
Implementation Method 2
a surface-treated layer formed of a surface treatment agent may be provided on a surface of the metal oxide particle
Data Source
Figure 1~2
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AI summary
Metal oxide powder formed of metal oxide particles, in which the metal oxide powder has first metal oxide particles having at least one protrusion portion and second metal oxide particles, the first metal oxide particles have an average primary particle diameter of 100 nm or more and 1,000 nm or less, the second metal oxide particles have an average primary particle diameter of less than 100 nm, and a fraction of a total mass of particles having a primary particle diameter of less than 100 nm in a total mass of the metal oxide powder is 0.3% by mass or more and 10% by mass or less.