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Stretchable, Biocompatible and Multifunctional Silk Fibroin-based Hydrogels towards Wearable Strain/Pressure Sensors and Triboelectric Nanogenerators.

07:00 EST 14th January 2020 | BioPortfolio

Summary of "Stretchable, Biocompatible and Multifunctional Silk Fibroin-based Hydrogels towards Wearable Strain/Pressure Sensors and Triboelectric Nanogenerators."

Nowadays, great effort has been devoted to establishing wearable electronics with excellent stretchability, high sensitivity, good mechanical strength and multifunctional characteristics. Herein, a soft conductive hydrogel is rationally designed by proportionally mixing silk fibroin, polyacrylamide, graphene oxide and poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate). The resultant hydrogel has considerable stretchability and compressibility, which enables to be assembled into a strain/pressure sensor with a wide sensing range (strain: 2%-600%, pressure: 0.5 kPa-119.4 kPa) and reliable stability. Then, the corresponding sensor is capable to monitor a series of physical signals of human body (e.g., joint movement, facial gesture, pulse, breathing, etc.). Especially, the hydrogel-based sensor is biocompatible with no anaphylactic reaction on human skin. More interestingly, this conductive hydrogel exhibits positive response when it works in a triboelectric nanogenerator, consequently lighting up 20 commercial green light emitting diodes. Thus, this silk fibroin-based hydrogel is a kind of multifunctional material towards wearable electronics with versatile applications in health and exercise monitors, soft robots and power source.

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This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
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Medical and Biotech [MESH] Definitions

A serine-rich sticky protein secreted by MOTHS. Generally, the term refers to silkworm silk gum protein secreted in the middle section of silk gland cells of SILKWORMS, Bombyx mori. Sericin acts as a cement and coating for the two fibroin filaments in a silk strand and is readily soluble in mild alkaline solution.

Fibrous proteins secreted by INSECTS and SPIDERS. Generally, the term refers to silkworm fibroin secreted by the silk gland cells of SILKWORMS, Bombyx mori. Spider fibroins are called spidroins or dragline silk fibroins

A non-essential amino acid. It is found primarily in gelatin and silk fibroin and used therapeutically as a nutrient. It is also a fast inhibitory neurotransmitter.

A biomineral consisting of layers of crystalized ARAGONITE, separated by interlamellar layers of organic matrix containing beta-CHITIN, and surrounded by an intercrystalline organic membrane of silk fibroin. Nacre is the iridescent substance better known as mother-of-pearl that is secreted by MOLLUSCS.

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