Foam-Based Wearable Devices Embedded with Shear-Thickening Fluids for Biomedical Protective Applications

Area of Science:

• Biomaterials Engineering
• Geriatric Medicine
• Protective Equipment Design

Background:

• Falls are a major cause of fractures in the elderly, especially hip fractures.
• Existing protective gear often lacks comfort or sufficient impact absorption.
• Shear-thickening fluids (STFs) offer potential for adaptive impact protection.

Purpose of the Study:

• To investigate the feasibility of using STFs in wearable devices for fall protection.
• To design and test STF-enhanced protective gear for the elderly.
• To evaluate the effectiveness of STFs in reducing impact-induced strain.

Main Methods:

• Fabrication of STF-filled foam and 3D-printed (TPU) sandwich panels.
• Ball drop tests simulating fall impact scenarios.
• Measurement of induced strain using Fiber Bragg Grating (FBG) sensors.

Main Results:

• STF integration reduced induced strain by approximately 50% in TPU devices and 30% in foam devices.
• The STF-filled compartments stiffened upon impact, dissipating energy effectively.
• The adaptive response mechanism balanced comfort during movement with impact protection.

Conclusions:

• STF-enhanced wearable devices show significant promise for reducing fall-related fractures in the elderly.
• This technology can improve quality of life and decrease healthcare costs associated with fall injuries.
• Further development could lead to widely adoptable, comfortable, and effective fall protection solutions.