Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 569, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2021.120922
Keywords
Aerogels; Microcrystalline cellulose; Hydroxyethyl cellulose; Attapulgite; Mechanical property
Funding
- National Natural Science Foundation of China [51702156]
- project of Jiangsu provincial Six Talent Peaks [XCL-231]
- General Program of Natural Science Fund in Colleges and Universities of Jiangsu Province [19KJB430023]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Brand Major Program Development of Jiangsu Higher Education Institutions [PPZY2015B128]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_15R35]
- China Postdoctoral Science Foundation [2020M671457, 2019M661781]
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The study developed novel and low-cost cellulose/attapulgite composite aerogels with high hydrophobicity, good thermal stability, and high compressive strength. These composite aerogels can be used as absorbents for oil spills, showing promising potential for oil cleaning applications.
The development of mechanical enhancement and sustainable absorbents for oil and chemical spills cleaning has attracted wide interest. In this work, novel and low-cost hydrophobic, cellulose/attapulgite (ATP) composite aemgels were prepared by freeze-drying and chemical vapor deposition. The composite aerogels were characterized by using X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron (XPS), scanning electron microscopy (SEM), Brunaur-Emmett-Teller (BET), and mercury intrusion porosimetry. The formation of Si-O-Si and C-H bonds observed according to FTIR and XPS indicated that the methyl groups from methyltrimethoxysilane (MTMS) had been grafted on the composite aerogels. The as-prepared composite aerogels showed high hydrophobicity with water contact angle up to 161.1 degrees. Moreover, the composite aerogels had threedimensional pore structures and good thermal stability. Compared to the pure microcrystalline cellulose (MCC) aemgel, the maximum compressive strength of composite aerogel with hydroxyethyl cellulose (HEC) and ATP build blocks was able to reach 1.43 MPa. Therefore, this work provided a low-cost method to prepare robust and sustainable MCC/HEC/ATP composite cellulose aerogels, which could be ideal absorbents for oil adsorption.
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