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23 March 2018 Alignment of cellulose nanofibers by high-DC magnetic field
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The fabrication of cellulose long-fiber (CL) is necessary for eco-friendly and high strength composites development. CL can be made with cellulose nanofiber (CNF) that has high mechanical strength and modulus. However, the mechanical properties of CL in early studies were shown to be lower than those of original CNF. An idea of fabricating strong CL is to align CNFs so as to make strong hydrogen bond between CNFs. To achieve this, alignment of CNF is very important. In this study, high dc magnetic field is introduced to align the CNFs. The CNFs are aligned perpendicular to the direction of dc magnetic field due to its negative diamagnetic anisotropy. CNFs isolated by TEMPO oxidation and aqueous counter collision method are used in this experiment. The CNF emulsion is located in the high dc magnetic field and cured. Alignment of CNF is investigated by using optical microscopy, scanning electron microscopy and mechanical tensile test.
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Hyun Chan Kim, Lindong Zhai, Jinmo Kang, Sunanda Roy, Le Van Hai, and Jaehwan Kim "Alignment of cellulose nanofibers by high-DC magnetic field ", Proc. SPIE 10597, Nano-, Bio-, Info-Tech Sensors, and 3D Systems II, 105970S (23 March 2018);

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