Plastic Lab Consumables With Molded Nanoscale Wettability
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Solution Overview
Problem
Existing methods for imparting wettability characteristics to laboratory consumables using hazardous chemicals like PFAS are problematic due to health risks and regulatory constraints, necessitating safer and more efficient alternatives.
Innovation Solution
A method involving a metallic mould with a textured surface created using nanoscale laser techniques to impart complementary nanoscale surface textures to plastic laboratory consumables, such as pipette tips, providing desired wettability characteristics without harmful chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hazardous chemicals like PFAS are used to impart wettability characteristics, then suitable wettability characteristics are achieved, but health risks and regulatory constraints arise
Solution Approach 1:
The patent replaces chemical methods (applying surfactants and compounds) with a physical method (laser texturing) to achieve wettability characteristics. The laser creates nanoscale surface structures that inherently provide hydrophobic or hydrophilic properties without requiring hazardous chemical substances, thus eliminating health risks associated with chemicals like PFAS while maintaining reliable wettability control.
Solution Approach 2:
The patent changes the surface parameters of the plastic laboratory consumable by creating nanoscale textures with specific geometric characteristics (pore size, shape, distribution) through laser processing. By controlling these physical parameters of the surface structure, the desired wettability characteristics are achieved without relying on chemical composition changes, thereby avoiding hazardous substances while maintaining functional reliability.
2Reliability
If additional chemical compounds are added to achieve wettability characteristics, then suitable wettability is obtained, but manufacturing complexity and additional steps are required
Solution Approach 1:
The patent combines the wettability characterization step with the molding process itself by integrating laser texturing into the manufacturing workflow. The laser-treated mold cavity directly imprints the nanoscale surface structure onto the plastic material during molding, merging what would otherwise be separate processes (molding and surface treatment) into a single integrated operation, thereby reducing manufacturing complexity.
Solution Approach 2:
The patent applies laser texturing to the mold cavity before the molding process, preparing the surface structure in advance. This preliminary action ensures that the nanoscale texture is already present on the mold surface, so that during the subsequent molding process, the plastic material automatically receives the desired surface structure without requiring additional post-processing steps or chemical treatments.
3Reliability
If surfactants and compounds are added to plastic material, then wettability characteristics are achieved, but mechanical and chemical properties may change
Solution Approach 1:
The patent substitutes chemical modification (adding surfactants and compounds to the plastic material) with physical modification (laser texturing of the mold surface). The nanoscale surface structure is transferred to the plastic during molding, providing wettability characteristics through surface geometry rather than chemical composition changes, thereby preserving the mechanical and chemical stability of the base plastic material.
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
Achieves safe and effective wettability characteristics for liquids, enhancing liquid handling precision and reducing sample loss, while allowing large-scale manufacturing of plastic laboratory consumables.
Implementation Method 1
texturing a surface of the metallic mould thereby creating a textured metallic mould having a first nanoscale surface texture... The texturing is carried out using a nanolaser, a femtosecond laser, or a pulsed ultrashort laser. The first nanoscale surface texture of the textured metallic mould comprises a laser-induced periodic surface structure, LIPSS.
Implementation Method 2
the plastic laboratory consumable receives a complementary nanoscale surface texture having at least one wettability characteristic for at least a first liquid... The at least one wettability characteristic comprises hydrophobicity, hydrophilicity, lipophobicity, or lipophilicity.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
According to an example aspect of the present invention, there is provided a method of manufacturing a plastic laboratory consumable, the method comprising: providing a metallic mould, said metallic mould being a substantial counterpart to a plastic laboratory consumable to be moulded with said metallic mould, texturing a surface of the metallic mould thereby creating a textured metallic mould having a nanoscale surface texture, and moulding a plastic laboratory consumable from a plastic material by using the textured metallic mould such that the plastic laboratory consumable receives a complementary nanoscale surface texture (110, 210) having at least one wettability characteristic for at least a first liquid .