Controlled tough bioadhesion mediated by ultrasound

Area of Science:

• Biomaterials Science
• Acoustic Engineering
• Tissue Engineering

Background:

• Achieving robust and controllable bioadhesion is crucial for biomedical and engineering applications.
• Current methods for forming strong bioadhesives often face challenges in control and durability.

Purpose of the Study:

• To develop a novel ultrasound-mediated strategy for creating tough bioadhesion with enhanced controllability and fatigue resistance.
• To investigate the underlying mechanisms of ultrasound-induced bioadhesion.

Main Methods:

• Utilized ultrasound (US) to mediate adhesion between hydrogels and porcine skin.
• Employed a combination of experimental approaches and theoretical modeling.
• Investigated US-induced cavitation as the primary mechanism.

Main Results:

• Ultrasound amplified adhesion energy by up to 100 times and interfacial fatigue threshold by 10 times.
• Demonstrated US-induced cavitation propels anchoring primers into tissues, overcoming barrier effects.
• Achieved spatial patterning of bioadhesion, on-demand detachment, and facilitated transdermal drug delivery.

Conclusions:

• Ultrasound-mediated strategy offers a non-chemical approach to achieve tough, controllable, and fatigue-resistant bioadhesion.
• The findings expand the possibilities for bioadhesive materials and technologies.
• This method holds potential for applications requiring precise control over bioadhesion and drug delivery.