Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 74, Issue 1, Pages 256-259Publisher
SPRINGER
DOI: 10.1007/s10971-015-3633-4
Keywords
Cellulose aerogels; Freeze drying; Mechanical properties; Porous materials; Polymers
Categories
Funding
- National Natural Science Foundation of China [31270590]
- China Postdoctoral Science Foundation [2013M540263]
- Doctoral Candidate Innovation Research Support Program of Science and Technology Review [kjdb2012006]
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Novel mechanically strong and lightweight cellulose aerogels were successfully prepared by the procedures in four steps: (1) dissolving bamboo fiber in a mild NaOH/PEG solution; (2) freeze-thaw treatment; (3) regeneration; (4) freeze drying. The aerogels with dense interconnected and hierarchical pore structures had high specific surface area of 204 m(2) g(-1), large pore volume of 0.99 cm(3) g(-1), high porosity as high as 97 % and low density of 0.054 g cm(-3), and showed cellulose II crystal structure. Moreover, the aerogels exhibited strong resistance to compression load with high Young' modulus of 1.85 MPa, yield stress of 83.57 kPa, and toughness of 52.34 kJ m(-3).
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