纳米纤维素气凝胶构建及其过滤聚苯乙烯微塑料性能研究

王洁; 王晓彤; 朱高坚; 刘超; 吴伟兵; 戴红旗; 卞辉洋

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Construction of Nanocellulose Aerogel and Its Filtration Properties for Polystyrene Microplastics

Received:May 31, 2023

DOI：10.11981/j.issn.1000-6842.2023.03.104

Key Words:microplastics;nanocellulose;aerogel;filtration property

Fund Project:国家自然科学基金项目（22208163，22208161）；江苏省高等学校大学生创新创业训练计划项目（2022NFUSPITP0338）。

Author Name	Affiliation	Postcode
WANG Jie	College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037	210037
WANG Xiaotong	College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037	210037
ZHU Gaojian	College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037	210037
LIU Chao	College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037	210037
WU Weibing	College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037	210037
DAI Hongqi	College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037	210037
BIAN Huiyang	College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037 International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, Jiangsu Province, 210037	210037

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Abstract:

Bleached eucalyptus pulp was chemically modified by 2，2，6，6-tetramethylpiperidine-1-oxyl （TEMPO） and 2，3-epoxypropyltrimethylammonium chloride （EPTMAC）， respectively， to produce modified cellulose nanofibrils （CNF） by high pressure homogenization. Then， modified CNF aerogels were prepared by freeze-drying process. The effects of types and concentrations of polystyrene microplastics （PSMPs） on the filtration properties of modified CNF aerogels were studied. Results showed that the filtration efficiency of EPTMAC modified aerogel （QCNF） for carboxylated polystyrene （PS-COOH） was 99%， while the filtration efficiency of TEMPO-oxidized CNF aerogel （TCNF） for aminated polystyrene （PS-NH₂） was 75%. The excellent filtration performance of modified aerogels mainly relied on the super hydrophilicity， unique three-dimensional porous structure and abundant surface active binding sites of the material. In addition， the filtration efficiency and flux of the modified CNF aerogels were over 99% and 20.2 L/（m²·h） after 8 cycles of filtration， showing good stability and reusability.

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