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| Preparation of Nanocelluloses from Waste Paper and Its Modification in Epoxidized Soybean Oil-based Polyurethane |
| Received:November 04, 2025 Revised:November 27, 2025 |
| DOI：10.11980/j.issn.0254-508X.2026.05.013 |
| Key Words:waste paper nanocelluloses biomass-based polyurethane |
| Fund Project:大学生创新训练计划项目（202510700034）。 |
| Author Name | Affiliation | Postcode | | GUO Qian* | Faculty of Printing, Packing Materials and Digital Media Technology, Xi’an University of Technology, Xi’an, Shaanxi Province, 710054 | 710054 | | LEI Wanqing* | Faculty of Printing, Packing Materials and Digital Media Technology, Xi’an University of Technology, Xi’an, Shaanxi Province, 710054 | 710054 | | GUO Pengfei | Faculty of Printing, Packing Materials and Digital Media Technology, Xi’an University of Technology, Xi’an, Shaanxi Province, 710054 | 710054 | | ZHANG Jiahao | Faculty of Printing, Packing Materials and Digital Media Technology, Xi’an University of Technology, Xi’an, Shaanxi Province, 710054 | 710054 | | LI Zeping | Faculty of Printing, Packing Materials and Digital Media Technology, Xi’an University of Technology, Xi’an, Shaanxi Province, 710054 | 710054 | | ZHOU Xing* | Faculty of Printing, Packing Materials and Digital Media Technology, Xi’an University of Technology, Xi’an, Shaanxi Province, 710054 | 710054 |
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| Abstract:Office waste paper was used as raw material and pretreated via deinking, beating, drying, and pulverizing to prepare high-value-added nanocelluloses (NCs) through enzymatic hydrolysis. Then NCs were used as a modifier in the synthesis of epoxidized soybean oil-based non-isocyanate polyurethane (NCs/NIPU) composite materials. The effects of NCs content (0.1%~1.5%) on the thermal properties, tensile properties, shape memory properties, and self-healing behavior of the NCs/NIPU composites were investigated. The results showed that NCs and NIPU formed a composite system mainly through physical blending. The addition of a small amount of NCs increased the char yield of NIPU from 11.8% to 18.1% (with 0.7% NCs added), improved the tensile strength by up to 252%, and raised the water contact angle to a maximum of 84.3°, showing hydrophilicity. Furthermore, the NCs/NIPU composites could recover from bending, curling, and twisting deformations within 50 s, especially the recovery time for twisting deformation was shortened by approximately 6 s. The NCs/NIPU composites materials also exhibited self-healing ability for damaged parts at 60 ℃, effectively extending the service life of NIPU. |
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