著者

高井(山下) 千加 馬渕 裕也 池田 純子 藤 正督 仙名 保 大矢 豊

出版者

一般社団法人 粉体工学会

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.58, no.4, pp.164-169, 2021-04-10 (Released:2021-05-21)

参考文献数

16

被引用文献数

1 1

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Mechanochemistry offers sustainable synthesis of the functionalized cellulose nanofiber (CNF). In this study, changes in the microstructure of the CNF aqueous sol by planetary ball milling were investigated in terms of its rheological behavior, crystallinity, and diameter distribution. The surface activity of the CNF was additionally characterized by a pulsed nuclear magnetic resonance (NMR). A decreased thixotropy hysteresis loop observed in the 100 min−1-treated CNFs indicated a weaker interaction among the fibers, but still having a three-dimensional structure. 300 min−1 could collapse them. A decreased x-ray diffraction peak intensity observed in the 500-min−1-treated CNF could indicate a split in the fiber’s bundle as well as shredding. An increase in the wet surface area (SNMR) could indicate surface activity in the 500-min−1 milled CNF sol. Such newly formed hydroxyl groups can serve as effective reaction sites with, for example, the TiO2 precursor and perhaps favorably works to improve the photocatalytic performance.

著者

小金沢 勝 浜田 憲二 田中 貴将 仙名 保

出版者

一般社団法人 粉体工学会

雑誌

粉工誌 (ISSN:03866157)

巻号頁・発行日

vol.25, no.8, pp.500-506, 1988

被引用文献数

1 1

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Surface modification, size reduction and the improvement of energy efficiency were achieved simultaneously by using organic additives during continuous grinding with a commercial disintegrator (Cosmomizer, Nara Machinery). Triethanol amine(TEA) and toluene solution of stearic acid (SA) in varying concentrations were used as additives. While the organophilization of limestone with SA was detected, the addition of TEA caused the opposite effect. The adhesion of TEA to the limestone was tighter when it was used as a grinding aid than when it was simply added through impregnation. This was suspeted to be the result of a tribochemical reaction.