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Open AccessArticle

Adsorption Characteristics of Ag Nanoparticles on Cellulose Nanofibrils with Different Chemical Compositions

1
Kangwon Institute of Inclusion Technology, Kangwon National University, Chuncheon-Si, Gangwon-do 24341, Korea
2
Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon-si, Gangwon-do 24341, Korea
3
Institute of Forest Science, Kangwon National University, Chuncheon-si, Gangwon-do 24341, Korea
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(1), 164; https://doi.org/10.3390/polym12010164
Received: 7 December 2019 / Revised: 7 January 2020 / Accepted: 7 January 2020 / Published: 8 January 2020
(This article belongs to the Section Biopolymers)
The adsorption characteristics of silver nanoparticles (AgNPs) on cellulose nanofibrils (CNFs) were investigated herein with different chemical compositions. Pure cellulose nanofibers (PCNFs), lignocellulose nanofibers (LCNFs) with different lignin contents (LCNF-20% and LCNF-31%), and holocellulose nanofibers (HCNFs) with hemicellulose were used in this study. Furthermore, CNFs and silver nitrate were mixed and reacted at different temperatures, and NaBH4 was used as the reducing agent. First, the effect of temperature on the adsorption of AgNPs on PCNF was studied. At an optimal temperature (45 °C), the effect of the chemical composition of CNF was studied. The overall properties were analyzed using UV-vis spectroscopy, transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The AgNPs were found to be spherical under all conditions with average diameter of 5.3 nm (PCNF), 5.6 nm (HCNF), 6.3 nm (LCNF-20%) and 6.6 nm (LCNF-31%). The amount of AgNPs adsorbed on the CNF was observed to vary, based on the chemical composition of the CNF. The adsorption amount of AgNPs was observed to increase in the order of LCNF-20% > PCNF > LCNF-31% > HCNF. The results indicated that phenolic hydroxyl groups present in LCNF significantly affected the adsorption of AgNPs. View Full-Text
Keywords: cellulose nanofiber; silver nanoparticles; adsorption; components; LCNF; HCNF; lignin cellulose nanofiber; silver nanoparticles; adsorption; components; LCNF; HCNF; lignin
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Kwon, G.-J.; Han, S.-Y.; Park, C.-W.; Park, J.-S.; Lee, E.-A.; Kim, N.-H.; Alle, M.; Bandi, R.; Lee, S.-H. Adsorption Characteristics of Ag Nanoparticles on Cellulose Nanofibrils with Different Chemical Compositions. Polymers 2020, 12, 164.

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