Functionalization of cellulose nanocrystals using catechol primers and hydrophobes for extended applications in non-polar media

使用儿茶酚引物和疏水物对纤维素纳米晶体进行功能化，以扩展在非极性介质中的应用

• 批准号: 542309-2019
• 负责人: Cranston, Emily
• 金额: $ 1.82万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680732
• 关键词: Functionalization; cellulose; nanocrystals; using; catechol

Cellulose nanocrystals (CNCs) are sustainable nanoparticles which can be economically extracted from the wood fibres of Canada's forests - an abundant and renewable resource. CNCs have impressive physical and mechanical properties and are non-toxic and biodegradable. CNCs have potential applications in a broad range of products, including paints, packaging, food, cosmetics and composites but they are limited by the fact that CNCs are hydrophilic and incompatible with most non-polar materials. In order to prevent CNCs from aggregating and to improve their dispersion in organic solvents and hydrophobic polymers, fibres and foams, hydrophobic surface functionalization is required. This project will produce hydrophobic CNCs through a modified version of a straightforward water-based functionalization route recently developed in our group. Currently, the method uses tannic acid (a plant polyphenol with catechol groups as the primer) and decylamine (a synthetic alkylamine hydrophobe). The improved and optimized method will be "greener" and scalable and will lead to CNCs that are more hydrophobic with less discoloration after functionalization. New catechol-containing primers and naturally-sourced hydrophobes will be investigated.BC Research has been instrumental in the scale-up of CNC production across Canada and continues to be active in this area. They, and their customers, need a hydrophobic CNC to produce CNC-enhanced commercial products. As such, successful completion of this project will have significant economic benefits for BC Research by opening up new product and market opportunities. The impact of carrying out this work will be economically significant for Canada's Forestry and Cleantech sectors and will develop new materials that will lead to job creation and new manufacturing initiatives in Canada.

纤维素纳米晶体（CNC）是可持续的纳米颗粒，可以从加拿大森林的木纤维中经济提取，这是一种丰富且可再生的资源。 CNC具有令人印象深刻的物理和机械性能，无毒且可生物降解。 CNC在广泛的产品中具有潜在的应用，包括油漆，包装，食品，化妆品和复合材料，但由于CNC是亲水性并且与大多数非极性材料不相容的事实，它们受到限制。为了防止CNC聚集并改善其在有机溶剂和疏水聚合物，纤维和泡沫中的分散体，需要疏水表面功能化。该项目将通过最近在我们组中开发的直接水基功能途径的修改版本生产疏水性CNC。目前，该方法使用单宁酸（一种带有儿茶酚基的植物多酚作为底漆）和链氨胺（合成烷基烷基疏水物）。改进和优化的方法将是“更绿”且可扩展的，并且会导致CNC更疏水，功能化后较少的变色。将研究新的含有儿茶酚的底漆和天然质质的植物。BC研究对加拿大CNC生产的扩大起来发挥了重要作用，并在该领域继续活跃。他们和他们的客户需要疏水CNC来生产CNC增强商业产品。因此，该项目的成功完成将通过开放新产品和市场机会来为卑诗省研究带来巨大的经济利益。进行这项工作的影响对于加拿大的林业和清洁技术领域具有经济意义，并将开发新材料，从而导致加拿大创造就业和新制造计划。