10.1021/acssuschemeng.8b02284.s001
Yulong Li
Yulong
Li
Yushang Liu
Yushang
Liu
Yang Liu
Yang
Liu
Wenchuan Lai
Wenchuan
Lai
Feng Huang
Feng
Huang
Anping Ou
Anping
Ou
Rui Qin
Rui
Qin
Xiangyang Liu
Xiangyang
Liu
Xu Wang
Xu
Wang
Ester Crosslinking Enhanced Hydrophilic Cellulose
Nanofibrils Aerogel
American Chemical Society
2018
covalent cross-linking
Hydrogen bond interactions
Ester Crosslinking Enhanced Hydrophilic Cellulose Nanofibrils Aerogel
shape memory performance
ester
cellulose
F-CNF aerogel
2018-08-03 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Ester_Crosslinking_Enhanced_Hydrophilic_Cellulose_Nanofibrils_Aerogel/6989585
The
ester cross-linking of cellulose nanofibril (CNF) aerogel was
carried out by a facile and highly effective gas–solid fluorinating
reaction without the assistance of organic solvent. The fluorination
achieved the coexistence of covalent cross-linking and more hydrophilic
groups, simultaneously endowing the fluorine-treated CNFs (F-CNFs)
aerogel with enduring water-durable and enhanced hydrophilic properties.
Hydrogen bond interactions between cellulose nanofibers are replaced
by covalent cross-linking of ester bonds, which makes the CNFs aggregate
more tightly and thus facilitates the enhancement of mechanical properties
of F-CNF aerogel. Meanwhile, the F-CNF aerogel exhibited ultralight
weight, excellent mechanical properties (123.4 KPa at 85% strain),
and water absorption (123.65 g/g), while having good shape memory
performance. What’s more, there was not any exotic element
introduced into F-CNFs, which can thus maximize the possibility for
the final materials to maintain the excellent biological properties
of the original CNFs.