Graphitic carbon from cellulosic materials: development and use

来自纤维素材料的石墨碳：开发和使用

• 批准号: RGPIN-2021-03172
• 负责人: Foster, Johan
• 金额: $ 4.66万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746769
• 关键词: Graphitic; carbon; cellulosic; materials; development

The synthesis of graphitic nanocarbon hollow tube-like structures utilizing pulp and cellulose nanomaterials as templates is explored in this work. Utilizing an inverting thermal degradation (iTD) method, the combustion kinetics of cellulose nanomaterials are altered through surface modifications. Hydrophobization and salt saturation of cellulose nanomaterials influence their thermal degradation behaviour, specifically ignition nucleating points and propagation rate. This phenomenon brought about by altering cellulose nanomaterials surface chemistry allowed for ignition of the bulk material, leaving behind the surface structure of the nanomaterial. Through this graphitization process, graphitic nanocarbon will be obtained and characterized. Several parameters including fibre aspect ratio, crystallinity, salt occlusion, ignition rate, and local oxygen availability can control the resulting nanostructure. Using this facile process and utilizing cellulose, the world's most abundant natural polymer, as the starting material, the work presented here could have profound implications for the future production of environmentally sustainable graphitic nanocarbon. Our overarching goal is to establish the fundamentals for obtaining nanocarbons from natural resources, produce nanocarbons derived from natural resources on industrial scale, replace conventional nanocarbon structures and incorporate naturally synthesized nanocarbons into commercial products.

本论文探索了以纸浆和纤维素纳米材料为模板合成石墨纳米碳中空管状结构。利用反转热降解（iTD）方法，通过表面改性改变纤维素纳米材料的燃烧动力学。纤维素纳米材料的疏水化和盐饱和度影响其热降解行为，特别是点火成核点和传播速率。通过改变纤维素纳米材料表面化学引起的这种现象允许点燃散装材料，留下纳米材料的表面结构。通过这种石墨化过程，将获得石墨纳米碳并对其进行表征。几个参数，包括纤维的纵横比，结晶度，盐闭塞，点燃率，和局部氧气的可用性可以控制所得的纳米结构。使用这种简单的过程，并利用纤维素，世界上最丰富的天然聚合物，作为起始材料，这里提出的工作可能对未来生产环境可持续的石墨纳米碳产生深远的影响。 我们的总体目标是建立从自然资源中获得纳米碳的基础，在工业规模上生产来自自然资源的纳米碳，取代传统的纳米碳结构，并将天然合成的纳米碳纳入商业产品。