Back to Search
Start Over
Rapid Moisture-Responsive Silk Fibroin Actuators
Rapid Moisture-Responsive Silk Fibroin Actuators
- Source :
- ACS applied materialsinterfaces. 13(7)
- Publication Year :
- 2021
-
Abstract
- We report the unique actuation characteristics of moisture-driven, fully reversible soft biopolymer films fabricated from Bombyx mori silk. The instantaneous actuation is driven by the water vapor induced stress gradient generated across the thickness of the film, and it possesses subsecond response and actuation times. The excellent durability and consistent performance of the film without any noticeable fatigue are established by subjecting it to more than a thousand continuous actuation cycles. The weight-lifting capability of the film is fascinating, where a few tens of micrograms of water generate a colossal force required to lift hundreds of milligrams of weight. Several other potential uses of silk fibroin based soft actuators, such as an intelligent textile layer with the crescent-shaped windows that open on perspiring skin and an autonomous crawler, are also demonstrated. Interestingly, even moisture emanating from the human palm triggers the ultrafast actuation process. These silk films are fabricated using a simple facile solution-casting technique, which can be scaled up with relative ease.
- Subjects :
- Materials science
Surface Properties
Soft robotics
Silk
Fibroin
02 engineering and technology
010402 general chemistry
01 natural sciences
Bombyx mori
Animals
General Materials Science
Composite material
Particle Size
Moisture
biology
021001 nanoscience & nanotechnology
biology.organism_classification
Bombyx
Durability
0104 chemical sciences
SILK
Volatilization
0210 nano-technology
Actuator
Fibroins
Layer (electronics)
Subjects
Details
- ISSN :
- 19448252
- Volume :
- 13
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- ACS applied materialsinterfaces
- Accession number :
- edsair.doi.dedup.....d0eb1923f955a0c570fe8f3f6af07fad