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（CNCs）是一种可持续的纳米颗粒，可以经济地从加拿大森林的木纤维中提取，这是一种丰富的可再生资源。cnc具有令人印象深刻的物理和机械性能，并且无毒和可生物降解。cnc在广泛的产品中有潜在的应用，包括油漆，包装，食品，化妆品和复合材料，但它们受到cnc亲水性和与大多数非极性材料不相容的事实的限制。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，需要疏水表面功能化。该项目将通过我们小组最近开发的直接水基功能化路线的改进版本生产疏水性cnc。目前，该方法使用单宁酸（一种以儿茶酚基为引物的植物多酚）和癸胺（一种合成的烷基胺疏水剂）。改进和优化的方法将是“更环保”和可扩展的，并将导致cnc在功能化后更疏水，变色更少。新的含儿茶酚的引物和天然来源的疏水性将被研究。BC Research在整个加拿大的CNC生产规模扩大中发挥了重要作用，并将继续活跃在这一领域。他们和他们的客户需要疏水性CNC来生产CNC增强的商业产品。因此，这个项目的成功完成将通过开辟新的产品和市场机会，为BC Research带来显著的经济效益。开展这项工作将对加拿大的林业和清洁技术部门产生重大的经济影响，并将开发新的材料，从而在加拿大创造就业机会和新的制造业举措。