TY - JOUR
T1 - Superhydrophobic cellulose nanofibril/silica fiber/Fe3O4 nanocomposite aerogel for magnetically driven selective oil absorption
AU - Mi, Hao Yang
AU - Li, Heng
AU - Jing, Xin
AU - Zhang, Qing
AU - Feng, Pei Yong
AU - He, Ping
AU - Liu, Yuejun
N1 - Funding Information:
This research was funded by the National Natural Science Foundation of China (51603075, 21604026 and 11705122) and the Grants from General Research Fund (GRF) (BRE/PolyU 152047/19E) and (BRE/PolyU 15210720).
Publisher Copyright:
© 2020, Springer Nature B.V.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - The development of superabsorbent materials with high absorption capacity, selectivity, and stable performance is needed for oil recovery. Remote-controlled oil absorption is highly favorable for oil absorption in harsh environment. In this study, a novel ultralight superhydrophobic nanocomposite aerogel composed of organic cellulose nanofibrils (CNFs), inorganic silica fiber, and magnetic Fe3O4 nanoparticles was developed through a simple freeze drying and surface modification method as a magnetically driven superabsorbent material. The aerogel has a highly porous and fibrous structure that contains hierarchical micro-nano surface topography. Low surface energy carbon–fluorine chains were grafted on aerogel surface which rendered the aerogel superhydrophobic. The addition of Fe3O4 nanoparticles significantly improved the surface area, compressive property, water contact angle, and the separation efficiency of the aerogel, but reduced the absorption capacity due to the increase of bulk density. The developed nanocomposite aerogel has a high absorption capacity (weight gain of 3420–5837%), separation efficiency ~ 100%, and a water contact angle of 150°. It also demonstrated high elasticity and performance stability in repetitive use. Given its magnetic property, the CNF/silica/Fe3O4 nanocomposite aerogel is a promising candidate for selective oil removal from open water, especially for remotely controlled applications.
AB - The development of superabsorbent materials with high absorption capacity, selectivity, and stable performance is needed for oil recovery. Remote-controlled oil absorption is highly favorable for oil absorption in harsh environment. In this study, a novel ultralight superhydrophobic nanocomposite aerogel composed of organic cellulose nanofibrils (CNFs), inorganic silica fiber, and magnetic Fe3O4 nanoparticles was developed through a simple freeze drying and surface modification method as a magnetically driven superabsorbent material. The aerogel has a highly porous and fibrous structure that contains hierarchical micro-nano surface topography. Low surface energy carbon–fluorine chains were grafted on aerogel surface which rendered the aerogel superhydrophobic. The addition of Fe3O4 nanoparticles significantly improved the surface area, compressive property, water contact angle, and the separation efficiency of the aerogel, but reduced the absorption capacity due to the increase of bulk density. The developed nanocomposite aerogel has a high absorption capacity (weight gain of 3420–5837%), separation efficiency ~ 100%, and a water contact angle of 150°. It also demonstrated high elasticity and performance stability in repetitive use. Given its magnetic property, the CNF/silica/Fe3O4 nanocomposite aerogel is a promising candidate for selective oil removal from open water, especially for remotely controlled applications.
KW - Cellulose
KW - Magnetic
KW - Nanocompsite aerogel
KW - Selective oil absorption
KW - Superhydrophobic
UR - http://www.scopus.com/inward/record.url?scp=85089486233&partnerID=8YFLogxK
U2 - 10.1007/s10570-020-03397-y
DO - 10.1007/s10570-020-03397-y
M3 - Journal article
AN - SCOPUS:85089486233
SN - 0969-0239
VL - 27
SP - 8909
EP - 8922
JO - Cellulose
JF - Cellulose
IS - 15
ER -