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논문 기본 정보

자료유형
학술저널
저자정보
Rahmini (Chungbuk National University) Soyoung Juhn (Nature Costech) Hyun-A Seong (Chungbuk National University) Soo-Jeong Shin (Chungbuk National University)
저널정보
한국펄프·종이공학회 펄프·종이기술 펄프·종이기술 제52권 제2호(통권 제193호)
발행연도
2020.4
수록면
12 - 22 (11page)
DOI
10.7584/JKTAPPI.2020.04.52.2.12

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초록· 키워드

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In this study, we investigated the rheological properties of 1.5% cellulose nanofibril (CNF) with various concentrations of monovalent ions using a rheometer at 25℃. Monovalent ions (Na<SUP>+</SUP>, K<SUP>+</SUP><SUP></SUP>, and Li<SUP>+</SUP>) were used for the ionic crosslinking of CNFs. The shear viscosity, storage moduli (G′), and loss moduli (G″) of 1.5% CNFs with various added cations were measured at concentrations of 500, 1,000, 5,000, and 10,000 ppm. The presence of cations in CNFs significantly induced strong hydrogels: As the cation concentration increased from 500 to 10,000 ppm, the viscosity, storage moduli, and loss moduli increased as well. All samples exhibited shear-thinning behavior with a monotonically decreased viscosity and an increased shear rate. Regarding hydrogel strength, we found that Li<SUP>+</SUP>>Na<SUP>+</SUP>>K<SUP>+</SUP> because of the different radii of the cations and interfibrillar bridging on the hydrogels. We concluded that the rheological properties of CNFs with various concentrations of monovalent ions differ depending on the ionic radius and concentration of each cation. Further research is proposed to determine the maximum strengths of hydrogels with added cations.

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ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
Literature Cited

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UCI(KEPA) : I410-ECN-0101-2020-586-000604776