Bactericidal Lubricating Synthetic Materials for Three-Dimensional Additive Assembly with Controlled Mechanical...

Area of Science:

• Materials Science
• Polymer Science
• Additive Manufacturing

Background:

• 3D printable synthetic materials are crucial for applications requiring specific surface and mechanical properties.
• Integrating lubricants into soft materials often causes phase separation, swelling, and reduced mechanical strength, limiting their practical use.
• Existing methods struggle to create complex, lubricating structures with controlled shapes and functionalities.

Purpose of the Study:

• To introduce a novel 3D printable lubricant-polymer composite (3D-LUBRIC) platform.
• To enable the seamless fabrication of multidimensional structures with diverse functionalities.
• To overcome limitations of phase separation and mechanical instability in lubricating materials.

Main Methods:

• Development of rationally designed lubricant-polymer mixtures incorporating silica aerogel particles.
• Utilizing direct ink writing (DIW) for additive manufacturing.
• Deterministic additive assembly of heterogeneous materials with varying oil permeability.

Main Results:

• 3D-LUBRIC exhibits suitable rheological properties for DIW without phase separation.
• The composite allows deterministic assembly of heterogeneous materials without shape distortion.
• Achieved tunable mechanical properties including transparency, flexibility, stretchability, anti-icing, and antibacterial/bactericidal functionalities.
• Demonstrated fabrication of self-cleanable containers and antibacterial medical tubes.

Conclusions:

• The 3D-LUBRIC platform facilitates the creation of low-adhesive, multifunctional synthetic materials with customized shapes.
• This approach offers new opportunities for advanced applications in packaging, microfluidics, and biomedical devices.
• The material overcomes key challenges in combining lubrication with 3D printability and mechanical integrity.