What is it about?
Drug-delivery microrobots need materials that are soft, stretchable, and shape-responsive. We created highly stretchable shape-memory hydrogels reinforced with a silk-fibroin semi-interpenetrating network: the silk skeleton anchors the shape-memory behavior while the hydrogel stretches dramatically without damage. The composite can be deformed, recover on cue, and carry payloads — a material platform aimed squarely at drug-delivery microrobots.
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Why is it important?
Stretchability and shape memory rarely coexist in hydrogels; the semi-interpenetrating silk network buys both at once. For microrobots that must squeeze through tight passages and then release cargo on schedule, this combination is the point.
Perspectives
Watching a hydrogel stretch to several times its length and still remember its shape felt like the material had learned a discipline.
Professor Wei Li
Huazhong University of Science and Technology
Read the Original
This page is a summary of: Highly Stretchable Shape Memory Hydrogels with Silk-Fibroin Semi-Interpenetrating Networks for Drug-Delivery Microrobot, August 2025, Institute of Electrical & Electronics Engineers (IEEE),
DOI: 10.1109/ucmmt67044.2025.11287593.
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