Ester Crosslinking Enhanced Hydrophilic Cellulose
Nanofibrils Aerogel
Yulong Li
Yushang Liu
Yang Liu
Wenchuan Lai
Feng Huang
Anping Ou
Rui Qin
Xiangyang Liu
Xu Wang
10.1021/acssuschemeng.8b02284.s001
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.
2018-08-03 00:00:00
covalent cross-linking
Hydrogen bond interactions
Ester Crosslinking Enhanced Hydrophilic Cellulose Nanofibrils Aerogel
shape memory performance
ester
cellulose
F-CNF aerogel