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@ARTICLE{Gener:862611,
author = {Gençer, Alican and Van Rie, Jonas and Lombardo, Salvatore
and Kang, Kyongok and Thielemans, Wim},
title = {{E}ffect of {G}elation on the {C}olloidal {D}eposition of
{C}ellulose {N}anocrystal {F}ilms},
journal = {Biomacromolecules},
volume = {19},
number = {8},
issn = {1526-4602},
address = {Columbus, Ohio},
publisher = {American Chemical Soc.},
reportid = {FZJ-2019-02880},
pages = {3233 - 3243},
year = {2018},
abstract = {One of the most important aspects in controlling colloidal
deposition is manipulating the homogeneity of the deposit by
avoiding the coffee-ring effect caused by capillary flow
inside the droplet during drying. After our previous work
where we achieved homogeneous deposition of cellulose
nanocrystals (CNCs) from a colloidal suspension by
reinforcing Marangoni flow over the internal capillary flow
(Gençer et al. Langmuir 2017, 33 (1), 228–234), we now
set out to reduce the importance of capillary flow inside a
drying droplet by inducing gelation. In this paper, we
discuss the effect of gelation on the deposition pattern and
on the self-assembly of CNCs during droplet drying. CNC
films were obtained by drop casting CNC suspensions
containing NaCl and CaCl2 salts. A mixed methodology using
rheological and depolarized dynamic light scattering was
applied to understand the colloidal behavior of the CNCs. In
addition, analysis of the mixture’s surface tension,
viscosity, and yield stress of the suspensions were used to
gain deeper insights into the deposition process. Finally,
the understanding of the gelation behavior in the drying
droplet was used to exert control over the deposit where the
coffee-ring deposit can be converted to a dome-shaped
deposit.},
cin = {ICS-3},
ddc = {570},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29953209},
UT = {WOS:000441852400008},
doi = {10.1021/acs.biomac.8b00493},
url = {https://juser.fz-juelich.de/record/862611},
}