Science, Space and Technology News 2024
This illustration highlights how two hydrogels can be bonded in different ways by thin chitosan films . The bonds that form are extraordinarily strong and can resist high tensions. Credit: Peter Allen, Ryan Allen, and James C. Weaver.
Hydrogels are already used in clinical practice for the therapeutic delivery of drugs to fight pathogens; as intraocular and contact lenses, and corneal prostheses in ophthalmology; bone cement, wound dressings, blood-coagulating bandages, and 3D scaffolds in tissue engineering and regeneration. Through a biomaterial screening approach, the team identified bridging films completely made of chitosan. Chitosan is a sugary polymer that can be easily made from the chitin shells of shellfish and has already found its way into wide-ranging commercial applications. For example, it is currently used to treat seeds and as a biopesticide in agriculture, to prevent spoilage in winemaking, in self-healing paint coatings, and in medical wound management.
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