期刊
RSC ADVANCES
卷 3, 期 7, 页码 2248-2255出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ra22111j
关键词
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资金
- National Basic Research Program of China (973 Program) [2011CB606103, 2012CB525005]
- National Natural Science Foundation of China [51173022]
- Shanghai Nano Special Projects [11nm0502900]
- Innovation Program of Shanghai Municipal Education Commission [11ZZ59]
- Dawn Program of Shanghai Education Commission [10SG32]
- Program for New Century Talents of the University in China
- Fundamental Research Funds for the Central Universities
Amphiphobic, microporous polyurethane (PU) composite microfibrous membranes exhibiting robust waterproof and breathable performances were prepared by the introduction of a novel synthesized fluorinated PU (FPU) containing head perfluoroalkane segment. By employing the FPU incorporation, the pristine PU membranes were endowed with the superhydrophobicity with water contact angle of 156 degrees and the oleophobicity with oil contact angle of 145 degrees. The role of FPU for the tuning of the morphology, surface wettability and mechanical property of resultant membranes were discussed, and a plausible two-step break mechanism upon the external stress is proposed. The quantitative fractal dimension analysis using N-2 adsorption method has confirmed the correlation between the hierarchical roughness and amphiphobicity. Furthermore, the as-prepared membranes exhibited high water resistance (39.3 kPa), good air permeability (8.46 L m(-2) s(-1)) and water vapor transmittance (0.384 kg m(-2) h(-1)), and comparable tensile strength (10 MPa), suggesting their use as promising materials for a variety of potential applications in protective clothing, bioseparation, membrane distillation, tissue engineering and catalyst carriers, etc., and also provided new insight into the design and development of functional microfibrous membranes through FPU incorporation.
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