Manufacturing method of an antimicrobial and adhesion-proof titanium tableware
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Solution Overview
Problem
Existing titanium tableware lacks sufficient antimicrobial and adhesion-proof properties due to a thin, polycrystalline oxidation layer that is easily worn out, leading to limited catalytic activity and poor microbial inhibition.
Innovation Solution
A manufacturing method that forms a thick, rutile crystalline titanium dioxide oxidation layer with a roughened surface on titanium tableware, combined with an oxygen diffusion layer, enhancing antimicrobial and anti-adhesion capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a natural oxidation layer is formed on titanium surface, then corrosion resistance is improved, but the oxidation layer is thin and easily worn out
Solution Approach 1:
The patent applies parameter changes by controlling oxidation temperature (700-900°C) and time (2-10 hours) to transform the natural thin oxidation layer into a thick titanium dioxide film with controlled thickness (5-50 μm) and specific rutile crystalline structure, thereby improving both corrosion resistance and durability
Solution Approach 2:
The patent creates a composite structure consisting of multiple layers: a thick titanium dioxide film (rutile phase) on the surface, an oxygen diffusion layer in the intermediate region, and the titanium substrate. This composite structure provides enhanced corrosion resistance and wear durability compared to the natural single-layer oxidation layer
2Ease of manufacture
If the titanium surface is left untreated with polycrystalline oxidation layer, then manufacturing is simple, but catalytic activity is limited and antimicrobial capability is poor
Solution Approach 1:
The patent changes the oxidation parameters (temperature 700-900°C, time 2-10 hours, oxygen atmosphere) to produce a thick titanium dioxide film with rutile crystalline structure and controlled porosity (30-70%), which provides high catalytic activity and excellent antimicrobial capability while maintaining manufacturing feasibility
3Reliability
If a thick oxidation layer is formed to improve antimicrobial properties, then photocatalytic activity increases, but manufacturing complexity increases
Solution Approach 1:
The patent optimizes oxidation parameters (temperature range 700-900°C, time 2-10 hours, oxygen pressure 0.1-10 atm) to achieve the desired thick titanium dioxide film with rutile structure and controlled porosity in a single oxidation step, avoiding the need for multiple complex treatment steps while ensuring high antimicrobial efficacy
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 results in titanium tableware with improved antimicrobial and adhesion-proof properties through stable photocatalytic activity and increased surface roughness, effectively inhibiting microbial growth and preventing food adherence.
Implementation Method 1
The oxidation layer structure is a titanium dioxide film generated by a combination of the titanium substrate and oxygen atoms
Implementation Method 2
the oxidation layer structure is the titanium dioxide film in a rutile crystalline form that is formed by oxidation of the titanium in α phase
Implementation Method 3
an oxygen diffusion layer is formed at an interface of the oxidation layer structure and the titanium substrate. The oxygen diffusion layer is formed by a solid solution of titanium oxide (TiO) in α phase
Data Source
AI summary
A manufacturing method of an antimicrobial and adhesion-proof titanium tableware having a contact portion for contacting foods, food ingredients, drinking water, beverages, or body parts of a user. The manufacturing method includes a preparation step implemented by using a titanium substrate to produce a tableware preform; a preparation step implemented by using a titanium substrate to produce a tableware preform; a surface treatment step implemented by washing a surface of the tableware preform and removing a primary oxidation layer on the surface of the tableware preform; and an oxidation step which includes: placing the tableware preform in a vacuum calcination furnace, heating the tableware preform to reach a temperature ranging from 700° C. to 850° C., and introducing oxygen for allowing one part of the surface of the tableware preform corresponding to the contact portion to be exposed to the oxygen for 3 hours to 12 hours.