• Title/Summary/Keyword: lignocellulose nanofibril

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Spray Drying of Lignocellulose Nanofibril (LCNF) and Characterization of Spray-dried LCNF (리그노셀룰로오스 나노피브릴의 분무건조 및 건조물의 특성)

  • Park, Chan-Woo;Han, Song-Yi;Lee, Seung-Hwan
    • Journal of the Korean Wood Science and Technology
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    • v.45 no.3
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    • pp.288-296
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    • 2017
  • In this study, the effect of spray-drying conditions and surfactant addition on the spray-drying yield, morphological characterization, size distribution and re-dispersity in water of spray-dried lignocellulose nanofibril (LCNF) were investigated. The freeze-dried LCNF after solvent exchange had linear fiber morphology with a diameter of 70-300 nm, and the spray-dried LCNF showed rod-like particle morphology. The spray-drying yield and particle size of spary-dried LCNF at $140^{\circ}C$ was highest and smallest, respectively. As LCNF concentration and blowing rate decreased and increased, respectively, the spray-drying yield and particle size were increased. The highest spray-drying yield was found at distearyl dimethyl ammonium chloride (DDAC) addition of 10 phr at $140^{\circ}C$. As the particle size decreased and the DDAC content increased, filtration time of spray-dried LCNF in water was decreased and increased, respectively.

Changes of Micro- and Nanoscopic Morphology of Various Bioresources by Different Milling Systems

  • Jang, Jae-Hyuk;Lee, Seung-Hwan;Lee, Min;Lee, Sang-Min;Kim, Nam-Hun
    • Journal of the Korean Wood Science and Technology
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    • v.45 no.6
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    • pp.737-745
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    • 2017
  • This study was carried out to investigate the changes in micro- and nanoscopic morphology of cellulose nanofibrils (CNFs) from various bioresources by investigating various mechanical milling systems. Mechanical milling in herbaceous bioresources was more effective than in woody bioresources, demonstrating lower energy consumption and finer morphology. The milling time to reach nanoscopic size was longer in woody bioresources than in herbaceous bioresources. Furthermore, at the same level of wet disk milling time, CNFs from herbaceous bioresources showed more slender morphology than those from woody bioresources. Tensile properties of nanopaper prepared from CNFs of herbaceous bioresources were higher than those of woody bioresources. The highest tensile strength was found to be 77.4 MPa in the nanopaper from Evening prim rose.