کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5189631 | 1381189 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Atomic force microscopy characterization of the ageing of pure cellulose paper
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Atomic force microscopy was used to characterize the effects of chemical reactions induced by accelerated ageing in a climatic chamber (80 °C, R.H. 65%) on Whatman no. 1 chromatography paper surface, in order to study ageing consequences on sub-micron structures in cellulose. Evaluation was carried out by means of a comparison of topographic data with chemical characterization, in addition to spectrophotometric measurement in the UV-vis-NIR range. Imaging of samples at several treatment stages showed a non-homogeneous decomposition of the fibre surface into fibril bunches. Over paper sheet surfaces, occurrence of this phenomenon increases with ageing. Spectrophotometry measurements showed a strong variation of contributions in the UV-vis bands, both in the yellow chromophores region and in the carbonyl formation region, which was consistent with the hypothesis that a predominant oxidation mechanism is involved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 26, 12 December 2005, Pages 12313-12321
Journal: Polymer - Volume 46, Issue 26, 12 December 2005, Pages 12313-12321
نویسندگان
Giovanna Piantanida, Marina Bicchieri, Carlo Coluzza,