{"title":"植物来源选择和化学机械处理对纳米纤维素薄膜的纤维微结构和机械性能的影响","authors":"Yangyang Qian, Chunyu Wang, Yijun Liu, Bingfei Shi, Jianqiang Zhang, Yuan Wei, Gang Chen","doi":"10.1007/s00226-024-01613-7","DOIUrl":null,"url":null,"abstract":"<div><p>Cellulose nanofibers (CNFs) were isolated and prepared from six different plant sources (Nordic pine, poplar, cotton, flax, bamboo, and pineapple leaf fibers) through a carboxymethylation-homogenization treatment. The surface morphologies, size distributions, and chemical structures of the CNFs and their microfibers were investigated in detail. Atomic force microscopy (AFM) analysis showed that all kinds of CNFs had uniform diameters of less than 10 nm. However, the length and aspect ratio of CNFs exhibited significant differences due to the differences of anatomical characteristics from pulp species. Among these six nanofibers, the pineapple leaf-based nanofibers had the highest length of ca. 2.21 μm and aspect ratio of ca. 1263. Meanwhile, the resulting pineapple leaf-based nanocellulose film possessed the strongest tensile strength (229.0 ± 9.8 MPa) and toughness (33.9 ± 2.9 MJ/m<sup>3</sup>). Interestingly, the aspect ratio of cotton nanofibers was only 556, lower than that of bamboo, Nordic pine, and flax nanofibers, but the tensile strength (210.6 ± 4.8 MPa) and toughness (22.4 ± 0.6 MJ/m<sup>3</sup>) of cotton-based nanocellulose film were second only to the pineapple leaf-based nanocellulose film. The critical reason is that the cotton-based nanocellulose exhibited the highest crystallinity index (76.6%), superior to the other source-based nanocellulose. These results suggested that the high aspect ratio or high crystallinity are responsible for the excellent mechanical strengths of the nanocellulose film. This work sheds light on the preparation and selection of highly spindly or crystalline nonwood nanofibrils, suggesting that the pineapple leaf or cotton nanofibers have great potential as strength additives for nanocomposites.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of plant source selection and chemi-mechanical treatment on the fiber microstructures and mechanical behaviors of nanocellulose films\",\"authors\":\"Yangyang Qian, Chunyu Wang, Yijun Liu, Bingfei Shi, Jianqiang Zhang, Yuan Wei, Gang Chen\",\"doi\":\"10.1007/s00226-024-01613-7\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Cellulose nanofibers (CNFs) were isolated and prepared from six different plant sources (Nordic pine, poplar, cotton, flax, bamboo, and pineapple leaf fibers) through a carboxymethylation-homogenization treatment. The surface morphologies, size distributions, and chemical structures of the CNFs and their microfibers were investigated in detail. Atomic force microscopy (AFM) analysis showed that all kinds of CNFs had uniform diameters of less than 10 nm. However, the length and aspect ratio of CNFs exhibited significant differences due to the differences of anatomical characteristics from pulp species. Among these six nanofibers, the pineapple leaf-based nanofibers had the highest length of ca. 2.21 μm and aspect ratio of ca. 1263. Meanwhile, the resulting pineapple leaf-based nanocellulose film possessed the strongest tensile strength (229.0 ± 9.8 MPa) and toughness (33.9 ± 2.9 MJ/m<sup>3</sup>). Interestingly, the aspect ratio of cotton nanofibers was only 556, lower than that of bamboo, Nordic pine, and flax nanofibers, but the tensile strength (210.6 ± 4.8 MPa) and toughness (22.4 ± 0.6 MJ/m<sup>3</sup>) of cotton-based nanocellulose film were second only to the pineapple leaf-based nanocellulose film. The critical reason is that the cotton-based nanocellulose exhibited the highest crystallinity index (76.6%), superior to the other source-based nanocellulose. These results suggested that the high aspect ratio or high crystallinity are responsible for the excellent mechanical strengths of the nanocellulose film. This work sheds light on the preparation and selection of highly spindly or crystalline nonwood nanofibrils, suggesting that the pineapple leaf or cotton nanofibers have great potential as strength additives for nanocomposites.</p></div>\",\"PeriodicalId\":810,\"journal\":{\"name\":\"Wood Science and Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-11-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Wood Science and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00226-024-01613-7\",\"RegionNum\":2,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"FORESTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Wood Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s00226-024-01613-7","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"FORESTRY","Score":null,"Total":0}
Effects of plant source selection and chemi-mechanical treatment on the fiber microstructures and mechanical behaviors of nanocellulose films
Cellulose nanofibers (CNFs) were isolated and prepared from six different plant sources (Nordic pine, poplar, cotton, flax, bamboo, and pineapple leaf fibers) through a carboxymethylation-homogenization treatment. The surface morphologies, size distributions, and chemical structures of the CNFs and their microfibers were investigated in detail. Atomic force microscopy (AFM) analysis showed that all kinds of CNFs had uniform diameters of less than 10 nm. However, the length and aspect ratio of CNFs exhibited significant differences due to the differences of anatomical characteristics from pulp species. Among these six nanofibers, the pineapple leaf-based nanofibers had the highest length of ca. 2.21 μm and aspect ratio of ca. 1263. Meanwhile, the resulting pineapple leaf-based nanocellulose film possessed the strongest tensile strength (229.0 ± 9.8 MPa) and toughness (33.9 ± 2.9 MJ/m3). Interestingly, the aspect ratio of cotton nanofibers was only 556, lower than that of bamboo, Nordic pine, and flax nanofibers, but the tensile strength (210.6 ± 4.8 MPa) and toughness (22.4 ± 0.6 MJ/m3) of cotton-based nanocellulose film were second only to the pineapple leaf-based nanocellulose film. The critical reason is that the cotton-based nanocellulose exhibited the highest crystallinity index (76.6%), superior to the other source-based nanocellulose. These results suggested that the high aspect ratio or high crystallinity are responsible for the excellent mechanical strengths of the nanocellulose film. This work sheds light on the preparation and selection of highly spindly or crystalline nonwood nanofibrils, suggesting that the pineapple leaf or cotton nanofibers have great potential as strength additives for nanocomposites.
期刊介绍:
Wood Science and Technology publishes original scientific research results and review papers covering the entire field of wood material science, wood components and wood based products. Subjects are wood biology and wood quality, wood physics and physical technologies, wood chemistry and chemical technologies. Latest advances in areas such as cell wall and wood formation; structural and chemical composition of wood and wood composites and their property relations; physical, mechanical and chemical characterization and relevant methodological developments, and microbiological degradation of wood and wood based products are reported. Topics related to wood technology include machining, gluing, and finishing, composite technology, wood modification, wood mechanics, creep and rheology, and the conversion of wood into pulp and biorefinery products.