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Title: Green Synthesis of polyvinyl alcohol (PVA)-cellulose nanofibril (CNF) hybrid aerogels and their use as superabsorbents

Source: J Mater Chem A, Volume 2, 2014. pp. 3110-3118.

Author(s)Zheng, Qifeng; Cai, Zhiyong; Gong, Shaoqin

Publication Year: 2014  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4706-2B

Abstract: Cross-linked polyvinyl alcohol (PVA)–cellulose nanofibril (CNF) hybrid organic aerogels were prepared using an environmentally friendly freeze-drying process. The resulting PVA/CNF aerogel was rendered both superhydrophobic and superoleophilic after being treated with methyltrichlorosilane via a simple thermal chemical vapor deposition process. Successful silanization on the surface of the porous aerogel was confirmed by various techniques including scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDS), Fourier transform infrared spectroscopy (FTIR), and contact angle measurements. The silane-treated, cross-linked PVA/CNF aerogels not only exhibited excellent absorption performance for various types of oils (e.g., crude oil) or organic solvents (with a typical weight gain ranging from 44 to 96 times of their own dry weight), but also showed a remarkable scavenging capability for several types of heavy metal ions tested (e.g., Pb2+, Hg2+), making them versatile absorbents for various potential applications including water purification. Furthermore, these PVA/CNF aerogels demonstrated excellent elasticity and mechanical durability after silane-treatment as evidenced by the cyclic compression tests.

Keywords: cellulose nanofibril; aerogel; superabsorbent; freeze-drying. And saline treatment

Publication Review Process: Formally Refereed

File size: 1,004 kb(s)

Date posted: 09/26/2014

This publication is also viewable on Treesearch:  view
RITS Product ID: 69685
Current FPL Scientist associated with this product
Cai, Zhiyong
Supervisory Research Materials Engineer

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