期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 9, 页码 4476-4483出版社
AMER CHEMICAL SOC
DOI: 10.1021/am301118f
关键词
asymmetric; superhydrophobic; free-standing films; anti adhesion; drug release; layer-by-layer assembly
资金
- National Basic Research Program of China [2011CB606203]
- China National Funds for Distinguished Young Scientists [51025312]
- Institut Universitaire de France
- European Commission (FP7) via a European Research Council starting grant (BIOMIM) [GA 259370]
- French government through a Eiffel Doctorat fellowship
- Rhone-Alpes region through a CMIRA fellowship
- French Embassy in China
- [NSFC-50830106]
A superhydrophobic/hydrophilic asymmetric free-standing film has been created using layer-by-layer assembly technique. Poly(ethylene-imine)-Ag+ complex (PEI-Ag+) at pH 9.0 was assembled with poly(acrylic acid) (PAA) at pH 3.2 on a Teflon substrate to yield a micronanostructured surface that can be turned to be superhydrophobic after being coated with a low surface energy compound. Silver nanoparticle loaded free-standing film with one surface being superhydrophobic while the other surface is hydrophilic was then obtained after detachment from the substrate. The superhydrophobicity enabled the upper surface with anti-adhesion and self-cleaning properties and the hydrophilic bottom surface can release silver ions as antibiotic agent. The broad-spectrum antimicrobial capability of silver ions released from the bottom surface coupled with superhydrophobic barrier protection of the upper surface may make the free-standing film a new therapy for open wound.
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