Wearable nanogenerator promotes wound healing with electric pulses

December 19, 2018 //By Nick Flaherty
Wearable nanogenerator promotes wound healing with electric pulses
Researchers at the University of Wisconsin, Madison have developed a self-powered bandage that can speed up healing of wounds.

Weibo Cai, Xudong Wang and colleagues wanted to develop a flexible, self-powered bandage that could convert skin movements into a therapeutic electric field.

To power their electric bandage, or e-bandage, the researchers made a wearable nanogenerator by overlapping sheets of polytetrafluoroethylene (PTFE), copper foil and polyethylene terephthalate (PET). The nanogenerator converted skin movements, which occur during normal activity or even breathing, into small electrical pulses. This current flowed to two working electrodes that were placed on either side of the skin wound to produce a weak electric field.

The team tested the device by placing it over wounds on the backs of rats. Wounds covered by e-bandages closed within 3 days, compared with 12 days for a control bandage with no electric field. The researchers attribute the faster wound healing to enhanced fibroblast migration, proliferation and differentiation induced by the electric field.

For more, see " Effective Wound Healing Enabled by Discrete Alternative Electric Fields from Wearable Nanogenerators .

www.wisc.edu

 


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