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| Effects of Storage Temperature on the Degradation Mechanism and Paper Properties of Pulp Fibers with High Moisture Content |
| Received:January 09, 2026 Revised:February 14, 2026 |
| DOI：10.11980/j.issn.0254-508X.2026.04.010 |
| Key Words:storage temperature high moisture content pulp fibers degradation mechanism |
| Author Name | Affiliation | Postcode | | CHEN Siyao* | 1National Engineering Research Center of Papermaking and Pollution Control, South China University of Technology, Guangzhou, Guangdong Province, 510640
2School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | GUAN Yuxin | 1National Engineering Research Center of Papermaking and Pollution Control, South China University of Technology, Guangzhou, Guangdong Province, 510640
2School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | LIU Ying* | 1National Engineering Research Center of Papermaking and Pollution Control, South China University of Technology, Guangzhou, Guangdong Province, 510640
2School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:This study explored the effects of different storage temperatures on three types of high moisture content pulps (kraft softwood pulp, kraft bamboo pulp, and alkali-processed bast pulp) and the paper properties. The results showed that during the 90-day storage period, high temperatures significantly accelerated the degradation of pulp fibers. Specifically, the average degree of polymerization of cellulose decreased sharply, and the crystallinity initially increased and then decreased. The pH of the pulp continued to decline, with the decline rate following the order of bamboo pulp>softwood pulp>bast pulp. The mechanical properties of the pulp fibers themselves severely deteriorated, with the decline rate of the wet zero-span tensile index following the order of bast pulp>softwood pulp>bamboo pulp. Correspondingly, the physical properties of the resulting paper also significantly decreased, and there were differences in the sensitivity of different types of pulps to high temperature and humidity. In contrast, low-temperature storage effectively delayed the degradation of pulp fibers. When stored at 5 ℃, the decline rate of the wet zero-span tensile index of the pulp did not exceed 12%, and the inter-fiber bonding was well maintained. Under freezing conditions, the average degree of polymerization of cellulose did not significantly decrease, and the crystallinity slightly increased. However, the physical properties of the pulp and the paper significantly declined, and the decline rate tended to stabilize in the later stage. |
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