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تأثیر تیمار نانوالیاف سلولز بر تغییرات رنگی کاغذهای تاریخی | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 7، دوره 37، شماره 1 - شماره پیاپی 78، فروردین 1401، صفحه 73-85 اصل مقاله (1.1 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2021.355459.1691 | ||
| نویسندگان | ||
| کبری دادمحمدی* 1؛ محسن محمدی آچاچلویی2؛ محمد تقی جعفری3 | ||
| 1دانشجوی دکتری مرمت آثار و اشیای فرهنگی و تاریخی، دانشکده حفاظت و مرمت، دانشگاه هنر اصفهان، اصفهان، ایران | ||
| 2استادیار، دانشکده حفاظت و مرمت، دانشگاه هنر اصفهان، اصفهان، ایران | ||
| 3دانشیار، دانشکده شیمی، دانشگاه صنعتی اصفهان، اصفهان، ایران | ||
| چکیده | ||
| این پژوهش با هدف ارزیابی تأثیر تیمار نانوالیاف سلولز بر تغییرات رنگی آثار کاغذی انجام شد. در این پژوهش دو نوع سوسپانسیون نانوالیاف سلولز با غلظت 1 درصد وزنی و درصد خشکی 4% با آب و همچنین اتانل تهیه شد. پس از تیماردهی، نمونههای آماده شده طبق استاندارد TAPPI T 544 sp-03 تحت پیرسازی حرارتی- رطوبتی قرار گرفتند و آزمونهای رنگسنجی، سنجش pH، طیفسنجیATR-FTIR و میکروسکوپ SEM قبل و پس از پیرسازی انجام شد. بررسـی طیـفهـایATR-FTIR به‌دست آمده از نمونهها، نشان داد که به‌کارگیری تیمار نانوالیاف سلولز باعـث تخریـب سـاختار کاغذ نمیشود. پس از کاربرد دو نوع تیمار با نانوالیاف سلولز رنگ نمونهها روشنتر شده است، اما پس از پیرسازی تسریعی میزان روشنی نمونهها کاهش یافته است. تیره شدن رنگ نمونهها به دلیل قرارگرفتن آنها در شـرایط پیرسـازی تسـریعی ایجاد شده و تیمار نانوالیاف سلولز عامـل تغییر رنگ نبوده است. pH نمونهها پس از کاربرد هر دو نوع تیمار نانوالیاف سلولز افزایش پیدا کرد اما بعـد از پیرسـازی تسریعی، pH مقداری کاهش یافت. | ||
| کلیدواژه‌ها | ||
| نانوالیاف سلولز؛ آثار کاغذی تاریخی؛ تغییر رنگ؛ رنگ سنجی؛ تیمار | ||
| عنوان مقاله [English] | ||
| The effect of cellulose nanofibers treatment on the discoloration of historical papers | ||
| نویسندگان [English] | ||
| Kobra Dadmohamadi1؛ Mohsen Mohammadi Achachluei2؛ Mohammad taghi Jafari3 | ||
| 1PhD student, Conservation of Historical and Cultural Properties, Faculty of conservation, Art University of Isfahan, Isfahan, Iran, | ||
| 2Assistant Professor, Conservation of Historical and Cultural Properties, Faculty of conservation, Art University of Isfahan, Isfahan, Iran. | ||
| 3Associate Professor, Faculty of Chemistry, Isfahan University of technology, Isfahan, Iran. | ||
| چکیده [English] | ||
| The aim of this study was to evaluate the effect of cellulose nanofiber treatment on discoloration of historical papers. In this study, two types of cellulose nanofiber suspensions with a concentration of 1% by weight with water and ethanol were prepared. After treatment, the prepared samples were subjected to moist-heat aging according to TAPPI T 544 sp-03 standard and colorimetric, pH, ATR-FTIR spectroscopy and SEM microscopy were performed before and after aging. Examination of ATR-FTIR spectra obtained from the samples showed that the application of cellulose nanofiber treatment does not cause damage to the paper structure. After application of two treatments with cellulose nanofibers, the color of the samples became brighter, but after accelerated aging, the brightness of the samples decreased.The darkening of the color of the samples was caused by their exposure to accelerated aging conditions and the treatment of cellulose nanofibers did not cause discoloration. The pH of the samples increased after application of both types of cellulose nanofiber treatments, but after accelerated aging, the pH decreased slightly. | ||
| کلیدواژه‌ها [English] | ||
| cellulose nanofibers, historical paper relics, discoloration, colorimetry, treatment | ||
| مراجع | ||
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