期刊
ADVANCED MATERIALS
卷 34, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202108889
关键词
hydrogel coatings; polymerization; sticky initiation layers; surface modifications
类别
资金
- National Natural Science Foundation of China [22032006, 52075522, 22072169]
- Key Research Program of the Chinese Academy of Sciences [XDPB24]
- Outstanding Youth Fund of Gansu Province [21JR7RA095]
- Key Research Project of Shandong Provincial Natural Science Foundation [ZR2021ZD27]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2019411]
A new method called ultraviolet-triggered surface catalytically initiated radical polymerization (UV-SCIRP) from a sticky initiation layer (SIL) has been proposed for growing hydrogel coatings on substrates/medical devices. This method allows for the modification of virtually any substrate's surface with controllable thickness and diverse compositions of hydrogel coatings. The hydrogel coatings exhibit good interface bonding with the substrates and enable easy changes in their wettability and lubrication performances. Importantly, this method facilitates the smooth growth of uniform hydrogel lubrication coatings on the surface of a range of medical devices with complex geometries.
Controllably coating the surfaces of substrates/medical devices with hydrogels exhibits great application potential, but lacks universal techniques. Herein, a new method, namely ultraviolet-triggered surface catalytically initiated radical polymerization (UV-SCIRP) from a sticky initiation layer (SIL) (SIL@UV-SCIRP), is proposed for growing hydrogel coatings. The method involves three key steps: 1) depositing a sticky polydopamine/Fe3+ coating on the surface of the substrates-SIL, 2) reducing Fe3+ ions to Fe2+ ions as active catalysts by UV illumination with the assistance of citric acid, and 3) conducting SCIRP in a monomer solution at room temperature for growing hydrogel coatings. In this manner, practically any substrate's surface (natural or artificial materials) can be modified by hydrogel coatings with controllable thickness and diverse compositions. The hydrogel coatings exhibit good interface bonding with the substrates and enable easy changes in their wettability and lubrication performances. Importantly, this novel method facilitates the smooth growth of uniform hydrogel lubrication coatings on the surface of a range of medical devices with complex geometries. Finally, as a proof-of-concept, the slippery balls coated with hydrogel exhibited smooth movement within the catheter and esophagus. Hence, this method can prove to be a pioneering universal modification tool, especially in surface/interface science and engineering.
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