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Polymers 2018, 10(6), 605; https://doi.org/10.3390/polym10060605

Preparation and Characterization of Superabsorbent Polymers Based on Starch Aldehydes and Carboxymethyl Cellulose

1
Department of Biosystems and Biomaterials Science & Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
2
LOTTE Fine Chemical Co., Ltd., 19, Yeocheon-ro 217 beon-gil, Nam-gu, Ulsan 44714, Korea
3
HYOSUNG CORPORATION, R&D Business Labs, 74, Simin-daero, Dongan-gu, Anyang-si, Gyeonggi-do 14080, Korea
4
Korea Institute of Ceramic Engineering and Technology, Ceramic Fiber & Composite Center, Jinju 52851, Korea
5
Korea Institute of Industrial Technology, Research Institute of Industrial Technology Convergence Human and Culture Convergence R&D Group, 143, Hanggaulro, Sangnok-gu, Ansan-si, Gyeonggi-do 15588, Korea
6
Research Institute for Agriculture and Life Sciences, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
*
Author to whom correspondence should be addressed.
Received: 9 May 2018 / Revised: 30 May 2018 / Accepted: 31 May 2018 / Published: 2 June 2018
(This article belongs to the Special Issue Polysaccharides)
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Abstract

Superabsorbent polymers (SAPs) are crosslinked hydrophilic polymers that are capable of absorbing large amounts of water. Commercial SAPs are mostly produced with acrylic acid that cannot be easily biodegraded. Therefore, in this study, polysaccharide-based SAPs using carboxymethyl cellulose as a major component were prepared. Starch aldehydes and citric acid were selected due to their environment-friendly, non-toxic, and biodegradable properties compared to conventional crosslinking agents. Starch aldehydes were prepared by periodate oxidation, which forms aldehyde groups by taking the places of C–OH groups at C-2 and C-3. Furthermore, starch aldehydes were analyzed through the change in FT-IR spectra, the aldehyde quantitation, and the morphology in FE-SEM images. In the crosslinking of polysaccharide-based SAPs, the acetal bridges from starch aldehydes led to a large amount of water entering the network structure of the SAPs. However, the ester bridges from citric acid interfered with the water penetration. In addition, the swelling behavior of the SAPs was analyzed by the Fickian diffusion model and the Schott’s pseudo second order kinetics model. The relationship between swelling behavior and morphology of the SAPs was analyzed by FE-SEM images. In conclusion, polysaccharide-based SAPs were well prepared and the highest equilibrium swelling ratio was 87.0 g/g. View Full-Text
Keywords: superabsorbent polymers; polysaccharides; carboxymethyl cellulose; starch aldehydes; citric acid superabsorbent polymers; polysaccharides; carboxymethyl cellulose; starch aldehydes; citric acid
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Lee, J.; Park, S.; Roh, H.-G.; Oh, S.; Kim, S.; Kim, M.; Kim, D.; Park, J. Preparation and Characterization of Superabsorbent Polymers Based on Starch Aldehydes and Carboxymethyl Cellulose. Polymers 2018, 10, 605.

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