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| Study on the Effect of Drying Methods on the Structure of Cellulose Membranes and Their Salinity-gradient Power Generation Performance |
| Received:December 08, 2025 Revised:March 20, 2026 |
| DOI：10.11980/j.issn.0254-508X.2026.06.001 |
| Key Words:cellulose membrane freeze-drying ion-selective transport salinity-gradient power generation |
| Fund Project:国家自然科学基金（32371978）；宜宾市竹产业重大攻关项目智慧竹业关键技术研究与集成示范（YBZD202401）。 |
| Author Name | Affiliation | Postcode | | LIU Yuanyuan* | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | YU Zhiyang | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | WANG Zhen | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | YANG Jiawei | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | HUANG Liulian | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | LI Jianguo* | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | CHEN Lihui | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 |
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| Abstract:This study employed natural cellulose as the raw material to prepare porous cellulose membranes via different drying methods， systematically investigated the effects of drying methods on the pore structure and salinity-gradient power generation performance. Compared to vacuum drying， heated drying， and drying at ambient temperature and pressure， freeze-drying endowed cellulose membranes with superior porous structure characteristics， under pre-freezing conditions at -80 ℃， freeze-dried porous cellulose membrane (-80-FDCM) exhibited abundant and uniform nanoscale pores with an average pore diameter of 10.8 nm, a specific surface area of 26.70 m²/g, porosity of 95.4%, and water retention of 173%, had a high ion-selective transport capacity. Under 50-fold and 500-fold NaCl concentration gradients, the output power density of -80-FDCM increased to 6.07 and 45.62 W/m²， respectively， while demonstrating excellent long-term operational stability. |
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