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| Effect of Deinking Process on Wastepaper Fiber Properties |
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| DOI： |
| Key Words:old newspaper; alkaline deinking; neutral deinking; fiber morphology; fiber structure |
| Fund Project:陕西省教育厅基金项目（09JK677）；西安理工大学创新基金项目（104-210803）。 |
| Author Name | Affiliation | | 张效林1 | 1.西安理工大学印刷包装工程学院，陕西西安，710048 | | 王汝敏2 | 2.西北工业大学理学院，陕西西安，710072 |
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| Abstract: |
| Two kinds of deinking processes, neutral deinking process and alkaline deinking process, were used for old newspaper (ONP) deinking. Olympus inverted biological microscope was used to analyze fiber and ink particles dispersing behaviors in the deinking system. Waste-paper fiber structures before and after deinking were characterized by FTIR. Scanning electron microscopy (SEM) was used to analyze fiber surface change after alkaline and neutral deinking. The results showed that the effect of different deinking process on the fiber morphology and structure is obvious. After deinking, the average fiber length and kink index decrease and fines increase. Influence of alkaline deinking on the fiber morphology is more significant than that of neutral deinking. Compared to alkaline deinking, the fiber morphology and structure after neutral deinking have few change, there is less hydroxyl group on the fiber surface and the neutral deinked fiber surface has less fibril and less damage. |
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