TY - JOUR
T1 - Facile surface modification of amphiphilic cellulose nanofibrils prepared by aqueous counter collision
AU - Yokota, Shingo
AU - Tagawa, Satomi
AU - Kondo, Tetsuo
N1 - Funding Information:
We thank Frank Kitching, MSc., from Edanz Group ( www.edanzediting.com/ac ) for editing a draft of this manuscript. The authors would like to thank Prof. Takuya Kitaoka from Kyushu University for his help with the XPS measurements. The authors would also like to thank Prof. Akihiko Takada from Kyushu University for his help with the NMR measurements. The authors would also like to thank KEYENCE Corp. for the fluorescent microscope investigations. This research was supported in part by JSPS KAKENHI Grant Number JP23780187 , JP18K05767 .
Funding Information:
We thank Frank Kitching, MSc. from Edanz Group (www.edanzediting.com/ac) for editing a draft of this manuscript. The authors would like to thank Prof. Takuya Kitaoka from Kyushu University for his help with the XPS measurements. The authors would also like to thank Prof. Akihiko Takada from Kyushu University for his help with the NMR measurements. The authors would also like to thank KEYENCE Corp. for the fluorescent microscope investigations. This research was supported in part by JSPS KAKENHI Grant Number JP23780187, JP18K05767.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/3/1
Y1 - 2021/3/1
N2 - The present study concerns the chemical modification of the surfaces of cellulose nanofibrils (CNFs) prepared by aqueous counter collision (ACC). Wood-derived CNFs prepared by ACC were acetylated with acetic anhydride in an aqueous dispersion. The moderately acetylated nanofibrils were more readily dispersible in water than unmodified CNFs, although the original nanofibrous morphology comprising crystalline cellulose I remained almost unchanged. This indicates that the surfaces of the crystalline CNFs had been selectively acetylated, which possibly inhibited self-aggregation between the nanofibrils, thereby facilitating dispersion in the aqueous medium. Despite the absence of additives, the acetylated CNFs were readily adsorbed onto hydrophobic surfaces, and retained their compatibility with water, which improved their ability to stabilize emulsions and coat plastic resin particles in water. The results indicate that the amphiphilic properties of CNFs prepared by ACC can be controlled by this facile surface acetylation method, which potentially increases their usefulness in various fields.
AB - The present study concerns the chemical modification of the surfaces of cellulose nanofibrils (CNFs) prepared by aqueous counter collision (ACC). Wood-derived CNFs prepared by ACC were acetylated with acetic anhydride in an aqueous dispersion. The moderately acetylated nanofibrils were more readily dispersible in water than unmodified CNFs, although the original nanofibrous morphology comprising crystalline cellulose I remained almost unchanged. This indicates that the surfaces of the crystalline CNFs had been selectively acetylated, which possibly inhibited self-aggregation between the nanofibrils, thereby facilitating dispersion in the aqueous medium. Despite the absence of additives, the acetylated CNFs were readily adsorbed onto hydrophobic surfaces, and retained their compatibility with water, which improved their ability to stabilize emulsions and coat plastic resin particles in water. The results indicate that the amphiphilic properties of CNFs prepared by ACC can be controlled by this facile surface acetylation method, which potentially increases their usefulness in various fields.
UR - http://www.scopus.com/inward/record.url?scp=85096016434&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85096016434&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2020.117342
DO - 10.1016/j.carbpol.2020.117342
M3 - Article
C2 - 33436185
AN - SCOPUS:85096016434
SN - 0144-8617
VL - 255
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
M1 - 117342
ER -