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題 名 | γ-射線照射對文化用紙光學性質的影響=Effects of Gamma Ray Irradiation on Optical Properties of Printing and Writing Paper |
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作 者 | 蘇裕昌; 趙國評; 陳鴻財; 陳家杰; | 書刊名 | 臺灣林業科學 |
卷 期 | 14:1 1999.03[民88.03] |
頁 次 | 頁37-44 |
分類號 | 476.5 |
關鍵詞 | γ-射線照射; FT-IR圖譜; 紙張性質; 光學性質; γ-ray irradiation; FT-IR spectrum; Paper properties; Optical properties; |
語 文 | 中文(Chinese) |
中文摘要 | γ-射線照射可應用為紙製品的滅菌法,但往往會對紙的主成分的纖維素、半纖維素造成降解作用,本論文探討以不同劑量 50 Krad~25 Mrad 的 γ-射線照射文化用紙,進行不同劑量做為滅菌法之可行性評估,定量照射後對各紙樣的光學性質如白度、色調及色差值等的影響,以為建立滅菌法的參考依據。同時進行照射紙張的 FT-IR 圖譜解析,以了解其顏色劣化之情形。結果顯示在 2.5 Mrad以上之照射劑量有 100% 之滅菌效果,2.5 Mrad 應為理想之滅菌劑量。低劑量(< 1 Mrad)照射各種文化用紙紙張之白度及色相無明顯之變化,中劑量(1.0~2.5 Mrad) 下紙張有明顯之顏色劣化如白度下降、黃度上升、色差值變大等,但在目視條件下仍不易區別,高照射劑量下(> 2.5 Mrad),照射試樣顯示有強度的顏色劣化。照射環境中,光線與空氣之有無均影響照射紙張之光學性質等,以空氣介質的有無影響較大。FT-IR 圖譜分析結果,顯示照射後纖維素分子降解所產生的衍生物,會在 1720 ㎝-1 附近會有新官能基形成(羧酸基、醛基或酮基等),此官能基對顏色劣化影響很大,亦受照射劑量影響,劑量愈大官能基形成愈多。 |
英文摘要 | γ-Rays used as a sterilization method for paper always cause degradation of main components such as cellulose and hemicellulose. This report elucidates the effects of γ-ray irradiation on optical properties (brightness, color difference, etc.) and examines the feasibility ofγ-ray irradiation for sterilization at different dosages. The results obtained can be used for establishing a proper sterilization method for paper. FT-IR spectrum analyses were also conducted and the results used for understanding color degradation of paper. Gamma-ray irradiation at dosages above 2.5 Mrad gave 100% sterilization, and 2.5 Mrad seems to be a proper dosage for sterilization of paper. No significant resultant changes in optical properties of the paper were shown at low (< 1 Mrad) and medium (1.0~2.5 Mrad) dosages of γ-ray irradiation. At high dosages (> 2.5 Mrad) of irradiation, the resulting paper showed significant decreases in brightness, increases in yellowness, and greater color differences. Conditions excluding light and air during irradiation influenced the optical properties of the resulting paper. The presence of air affects the properties more than that of light. FT- IR spectrum analyses showed that a new adsorption band was formed near 1720 ㎝-1. This reveals the formation of functional groups in irradiated paper, and they are assumed to be carboxyl, aldehyde, or ketone groups. Formation of functional groups is responsible for the discoloration of the irradiated paper. The higher the dosage of irradiation, the higher the amounts of functional groups formed. |
本系統中英文摘要資訊取自各篇刊載內容。