The characteristic fragment ions and visualization of cationic starches on pulp fiber using ToF‐SIMS |
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| Authors: | Yasuyuki Matsushita Takuya Sekiguchi Kaori Saito Toshiyuki Kato Takanori Imai Kazuhiko Fukushima |
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| Institution: | 1. Graduate School of Bioagricultural Sciences, Nagoya University, Furo‐cho, Chikusa‐ku, Nagoya 464‐8601, JapanGraduate School of Bioagricultural Sciences, Nagoya University, Furo‐cho, Chikusa‐ku, Nagoya 464‐8601, Japan.;2. Graduate School of Bioagricultural Sciences, Nagoya University, Furo‐cho, Chikusa‐ku, Nagoya 464‐8601, Japan;3. Technical Center, Nagoya University, Furo‐cho, Chikusa‐ku, Nagoya 464‐8601, Japan |
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| Abstract: | Time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) was used to investigate the distribution of cationic starch on pulp fiber. To identify the characteristic fragment ions of the cationic starches, deuterium‐labeled cationic starches were prepared and analyzed using ToF‐SIMS. The starch 2‐hydroxypropyltrimethylammonium chloride derivative generated characteristic fragments at m/z 58 and 59, which were identified as H2C?N(CH3)2]+ and N(CH3)3]+·, respectively. The fragmentation patterns were also suggested. From the imaging analysis, the adsorption of the cationic starch on fibers was uneven on individual fibers, as well as between fibers. This may have been on account of fiber morphology and structure. On examining scanning electron microscope (SEM) images, the quaternary ammonium starch derivative (QS) did not penetrate the fiber. No migration of cationic starch was observed under various drying conditions. Copyright © 2007 John Wiley & Sons, Ltd. |
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| Keywords: | cationic starch ToF‐SIMS imaging deuterium label distribution pulp |
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