Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 132, Issue 24, Pages -Publisher
WILEY
DOI: 10.1002/app.42037
Keywords
adsorption; cellulose and other wood products; functionalization of polymers; nanostructured polymers; surfaces and interfaces
Categories
Funding
- National Natural Science Foundation of China [31270590]
- China Postdoctoral Science Foundation [2013M540263]
- Doctoral Candidate Innovation Research Support Program of Science & Technology Review [kjdb2012006]
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Ultralight aerogels based on nanofibrillated cellulose (NFC) isolated from coconut shell were successfully prepared via a mild fast method, which included chemical pretreatment, ultrasonic isolation, solvent exchange, and tert-butanol freeze drying. The as-prepared NFC aerogels with complex three-dimensional fibrillar networks had a low bulk density of 0.84 mg/cm(3) (specific surface area=9.1 m(2)/g and pore volume=0.025 cm(3)/g), maintained a cellulose I crystal structure, and showed more superior thermal stability than the coconut shell raw materials. After the hydrophobic modification by methyl trichlorosilane (MTCS), the NFC aerogels exhibited high water repellency properties, an ultrastrong oil-adsorption capacity (542 times that of the original dry weight of diesel oil), and superior oil-water separation performance. Moreover, the absorption capabilities of the MTCS-treated NFC aerogels were as high as 296-669 times their own weights for various organic solvents and oil. Thus, this class of high-performance adsorbing materials might be useful for dealing with chemical leaks and oil spills. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42037.
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