An elastic second skin.

Area of Science:

• Biomaterials Science
• Dermatology
• Polymer Chemistry

Background:

• Aging and various conditions compromise skin barrier function and elasticity.
• Existing treatments for skin laxity and herniation often involve invasive procedures.
• There is a need for non-invasive, wearable solutions that restore skin-like properties.

Purpose of the Study:

• To synthesize and characterize an elastic, wearable crosslinked polymer layer (XPL) that mimics youthful skin.
• To evaluate the performance and efficacy of XPL in a pilot human study for cosmetic improvement.
• To explore the potential applications of XPL in skin repair and drug delivery.

Main Methods:

• Synthesis of a tunable polysiloxane-based material for XPL with controlled elasticity, contractility, adhesion, tensile strength, and occlusivity.
• Topical application of XPL, which cures rapidly at the skin interface without external activation.
• Pilot human study involving 12 subjects with lower eyelid fat pad herniation, assessing XPL performance using a 5-point severity scale.

Main Results:

• XPL demonstrated a tensile modulus matching normal skin at low strain (<40%) and withstood elongations >250% with elastic recoil.
• Topical application of XPL to herniated lower eyelid fat pads resulted in an average 2-grade decrease in herniation appearance.
• The material showed tunable properties, allowing for engineering specific mechanical and barrier functions.

Conclusions:

• The developed elastic, wearable crosslinked polymer layer (XPL) effectively mimics key properties of youthful skin.
• XPL shows promise as a non-invasive cosmetic treatment for skin laxity and herniation, with potential for broader dermatological applications.
• The XPL platform offers a versatile solution for compromised skin barrier function, pharmaceutical delivery, and wound dressings.