Bioinspired Dopamine/Mucin Coatings Provide Lubricity, Wear Protection, and Cell-Repellent Properties for Medical...

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Medical Device Engineering

Background:

• Medical devices face challenges with biofouling and tribological performance, leading to device failure.
• Existing solutions often address these issues separately, necessitating a combined approach.

Purpose of the Study:

• To develop a multifunctional coating for medical devices that simultaneously improves anti-biofouling properties and tribological performance.
• To utilize dopamine for immobilizing mucin macromolecules onto surfaces, mimicking mussel adhesion.

Main Methods:

• Dopamine was used to pre-coat substrates and medical devices.
• Purified mucin macromolecules were adsorbed onto the dopamine-coated surfaces, forming a double-layer.
• The stability and performance of the dopamine/mucin coating were evaluated under mechanical stress and in aqueous solutions.

Main Results:

• Mucin successfully adsorbed onto dopamine-pre-coated substrates, forming a stable double-layer.
• The dopamine/mucin coating demonstrated reduced friction, particularly in the boundary lubrication regime.
• The coating effectively decreased wear damage and provided significant anti-biofouling properties.

Conclusions:

• The dopamine/mucin double-layer coating is a promising strategy for enhancing the surface properties of medical devices.
• This approach offers a potential solution for improving the longevity and efficacy of devices like catheters, stents, and blood vessel substitutes.