ارزیابی اثر زمان غوطه‌وری بر ویژگی‌های فیزیکی کاغذهای تاریخی تیمار شده با نانوالیاف سلولز

نوع مقاله : مقاله پژوهشی

نویسنده

مربی، گروه کتابت و نقاشی دانشکده هنر، دانشگاه الزهرا (س)، تهران، ایران، صندوق پستی: ۱۹۹۳۸۹۳۹۷۳

چکیده

در این پژوهش، سوسپانسیون نانوالیاف سلولز با غلظت 1 درصد وزنی با آب، تهیه شد و نمونه­‌ها به مدت 30، 60، 90، 120، 150، 180  ثانیه در ماده تیمار غوطه‌ور شدند. تأثیر پارامترهایی از قبیل رنگ‌سنجی، pH، مقاومت کششی و زاویه تماس، قبل و پس از پیرسازی بررسی شد. نتایج نشان داد که پس از تیمار، رنگ نمونه‌­ها نسبت به نمونه شاهد بدون تیمار روشن‌تر شده است اما پیرسازی سبب کاهش روشنایی در کاغذ شده است. رنگ نمونه­‌های تیمار شده به مدت 150 و 180 ثانیه نسبت به سایر نمونه­‌ها روشن‌تر شده است. pH نمونه‌ها پس از تیمار افزایش پیدا کرد. بیشترین میزان pH مربوط به نمونه تیمار شده به مدت 150 ثانیه قبل و پس از پیرسازی بود. با افزایش زمان غوطه‌­وری­ نمونه­‌ها به مدت 150 و 180 ثانیه، بیشترین میزان مقاومت کششی قبل و پس از پیرسازی به دست آمد. نتایج اندازه‌گیری زاویه تماس نشان داد تیمار نانوالیاف سلولز تأثیری در افزایش مقاومت کاغذ در برابر خیس شدن نداشته و مانع از خیس شدن سطح کاغذ نشده است.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of the Effect of Immersion Time on the Physical Properties of Historical Papers Treated with Cellulose Nanofibers

نویسنده [English]

  • kobra dadmohamadi
Department of Calligraphy and Painting, Faculty of Art, Alzahra University, P.O. Code: 1993893973, Tehran, Iran
چکیده [English]

This study prepared a suspension of cellulose nanofibers with a concentration of 1% by weight with water, and samples were immersed in the treatment material for 30, 60, 90, 120, 150, and 180 seconds. The effect of parameters such as colorimetric, pH, tensile strength and contact angle before and after ageing was performed. The results showed that after treatment, the color of the samples became lighter than the control sample without treatment. But ageing has reduced the brightness of the paper. The color of the treated samples was lighter for 150 and 180 seconds than the other samples. The pH of the samples increased after treatment. The highest pH was related to the sample treated for 150 seconds before and after ageing. The highest tensile strength was obtained before and after ageing by increasing the samples' immersion period for 150 and 180 seconds. The results of measuring the contact angle showed that the treatment of cellulose nanofibers had no effect on increasing the paper resistance to wetting and did not prevent the paper surface from getting wet.

کلیدواژه‌ها [English]

  • Cellulose nanofibers
  • Historical papers
  • Physical properties
  • Accelerated ageing
  • Treatment

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