Preparation and Performance of Superabsorbent Polymer with Cellulose Additives
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ISSN 1229-9197 (print version) ISSN 1875-0052 (electronic version)
Preparation and Performance of Superabsorbent Polymer with Cellulose Additives Yoo Jin Kim1,2, Seok Ju Hong1,3, Woo Seung Shin1,3, Yong Rok Kwon1,3, Seung Ho Lim1,3, Jung Soo Kim1,4, Jun Choi1, Jin Woong Kim5, and Dong Hyun Kim1* 1
Department of Human Convergence Technology Group, Korea Institute of Industrial Technology (KITECH), Ansan 15588, Korea 2 School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Korea 3 Department of Material Chemical Engineering, Hanyang University, Ansan 15588, Korea 4 Department of Packaging, Yonsei University, Wonju 26493, Korea 5 School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Korea (Received November 10, 2019; Revised March 11, 2020; Accepted March 14, 2020)
Abstract: A superabsorbent polymer was synthesized with itaconic acid and vinyl sulfonic acid. The superabsorbent polymer was treated with various kinds of cellulose additives. The superabsorbent polymer with nanocellulose showed excellent performance. The optimal content of nanocellulose regarding water absorption properties was around 2 wt%. The characteristics of the novel itaconic acid-based superabsorbent polymer with added nanocellulose were analyzed. We confirmed the successful introduction of nanocellulose into the superabsorbent polymer by Fourier-transform infrared and Xray diffraction analyses. The surface structure and thermal properties of the superabsorbent polymer were confirmed by scanning electron microscopy and thermal gravimetric analysis respectively. The effects of the addition and content of nanocellulose on the absorption performance of the superabsorbent polymer were studied, and the water absorption performance of the superabsorbent polymer was confirmed by measuring its centrifuge retention capacity and absorbency under load. Keywords: Superabsorbent polymers, Cellulose, Nanocellulose, Itaconic acid, Water absorption
Some SAP synthesized by grafting carboxyl methyl cellulose (CMC) has advantages of strong water retention, high gel strength and biodegradability. However, strong hydrogen bonds between cellulose molecules reduce water solubility and reactivity. Due to these problems, a watersoluble CMC based SAP has been mainly studied. However, there have been little reports regarding the effects of various types of celluloses on the absorption properties of SAP [5-9]. Conventional water-absorbing materials such as acrylic acid and acrylamide have been used in the manufacture of SAPs. However, although these materials improve the physical properties of the SAPs through neutralizing agents and surface treatment methods, the serious toxicity of the monomers may adversely affect the wearer’s skin. In addition, disposable diapers using polyacrylic acid may cause potential environmental pollution during post-treatment. There is considerable interest in the use of natural products to resolve these problems. Natural resource-based SAPs have excellent commercial and environmental value, with the advantages
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