Journal
CHEMISTRY OF MATERIALS
Volume 21, Issue 5, Pages 898-902Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm8031708
Keywords
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Funding
- National Natural Science Foundation of China [20774035]
- National Basic Research Program [2009CB939701, 2007CB808000]
- Foundation for the Author of National Excellent Doctoral Dissertation of P. R. China [200323]
- New Century Excellent Talents in University (NCET)
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The mimic of petals of the morning glory flower can produce novel humido- and thermo-responsive membranes. In this work, humido- and thermo-responsive film has been fabricated by vacuum deposition of a nanoscale-thick aluminum layer on top of the thermally cross-linked poly(acrylic acid) (PAA)/poly(allylamine hydrochloride) (PAH) free-standing film. The bilayer Al/(PAA/PAH) film can undergo bending/unbending movements when the environmental humidity and/or temperature changes, which mimics the petals of morning glory flowers. The bending/unbending movement of the bilayer films is caused by the large difference in response of the aluminum layer and the PAA/PAH polymeric film toward humidity and temperature. The present study provides a simple and flexible way to prepare novel humido- and thermo-responsive film materials.
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