Transparent Electrode and Magnetic Permalloy Made from Novel Nanopaper.
We report a novel partial dissolution strategy to liberate uniform cellulose nanofibers with diameter of 5-10 nm from macroscopic cellulose fibers and promote separation of nanofibers in an aqueous environment by forming water-soluble sodium carboxymethylcellulose (CMC) through heterogeneous sodium acetoxylation of cellulose. With the obtained cellulose nanofibers, we fabricated nanopapers which exhibit high optical transparency of 90.5% (@550 nm) with promising mechanical properties and high thermal stability. By directly depositing Ag nanowires on a wet nanofiber sheet, we fabricated a flexible transparent electrode with 86.5% (@550 nm) transparency and 26.2 Ω/sq sheet resistance (Rs). Meanwhile, we studied the magnetic properties of sputter deposited thin film of permalloy on nanopaper which exhibited a similar magnetic coercivity and a close saturation magnetization to conventional silicon dioxide-based permalloy.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, Guangdong 510640, China.
Jinbo
J
Chen
Department of Mechanical Engineering, Leibniz Universitaet Hannover , 30167 Hannover, Germany.
Meriem
M
Akin
Department of Mechanical and Industrial Engineering, Northeastern University , Boston, Massachusetts 02115, United States.
Lei
L
Yang
Department of Mechanical and Industrial Engineering, Northeastern University , Boston, Massachusetts 02115, United States.
Li
L
Jiao
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, Guangdong 510640, China.
Fan
F
Cheng
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, Guangdong 510640, China.
Pengbo
P
Lu
Department of Mechanical and Industrial Engineering, Northeastern University , Boston, Massachusetts 02115, United States.
Liao
L
Chen
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, Guangdong 510640, China.
Detao
D
Liu
Department of Mechanical and Industrial Engineering, Northeastern University , Boston, Massachusetts 02115, United States.
Hongli
H
Zhu
alkalization and sodium acetoxylation; cellulose nanofiber; flexible electronics; magnetic permalloy device; sodium carboxymethyl cellulose