Benign Metal Initiators for the Production of Biopolymers and their subsequent depolymerisation

用于生产生物聚合物及其后续解聚的良性金属引发剂

• 批准号: 1934429
• 金额: --
• 依托单位: University of Bath
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1934429
• 关键词: Benign; Metal; Initiators; Production; Biopolymers

This project will combine expertise in the Jones group in the preparation of Lewis acidic metal complexes and exploitthis in the production of new biopolymers. Recently several initiator have been shown to be significantly more activethan other systems and are able to work at industrially relevant conditions. The project will be split into severalstrands:1. Ligand modification and varying metal centre (Chemistry Bath/Cardiff). This will involve the expansion of the familyof ligands (varying sterics, electronics) and complexing these to a range of metal centres.2. Homo and co-polymerisation the complexes will be screened for the homo-polymerisation of cyclic esters (eglactide, caprolactone, butryolactone) and co-polymerisation of epoxide/CO2 and epoxide/anhydrides underindustrially relevant conditions (high temperature and solvent free). This is extremely challenging, however, we havedeveloped catalysts that show promise. The most promising homo-polymerisation catalysts will be taken forward forco-polymerisations. This, presumably, will lead to either block copolymers or alternating copolymers depending onthe reactivity ratios. The precise conditions required for effecting highly alternating copolymers is an area that ispoorly understood, and will therefore be an interesting avenue to explore.3. In line with the "cyclic economy concept" we will investigate catalytic depolymerisation of commercially relevantbiopolymers. Initially we will focus our investigation on polyesters {polylactide -PLA}. Disposal of plastics into landfillcauses loss of materials' value and also contributes to environmental problems. It is imperative that technology isdeveloped that can recycle polymers to recover the monomer (or useful chemical starting materials). This potentiallycan be achieved by catalytic depolymerisation

该项目将结合联合收割机的专业知识，在琼斯集团在制备刘易斯酸性金属络合物，并利用这在生产新的生物聚合物。最近，几种引发剂已被证明比其它体系的活性高得多，并且能够在工业上相关的条件下起作用。该项目将分为几个股：1.配体修饰和改变金属中心（Chemistry Bath/卡迪夫）。这将涉及配体家族的扩展（不同的空间位阻，电子学）和将这些配体络合到一系列金属中心。均聚和共聚将筛选环酯（乙交酯、己内酯、丁内酯）的均聚和在工业相关条件（高温和无溶剂）下环氧化物/CO2和环氧化物/酸酐的共聚的复合物。这是极具挑战性的，然而，我们已经开发出了有希望的催化剂。最有前途的均聚催化剂将被用于共聚反应。根据竞聚率的不同，这可能会导致嵌段共聚物或交替共聚物。实现高度交替共聚物所需的精确条件是一个知之甚少的领域，因此将是一个有趣的探索途径。根据“循环经济概念”，我们将研究商业相关生物聚合物的催化解聚。首先，我们将集中我们的调查聚酯{聚乳酸-PLA}。将塑料丢弃到垃圾填埋场会造成材料价值的损失，也会导致环境问题。当务之急是开发技术，可以回收聚合物回收单体（或有用的化学原料）。这可能通过催化解聚来实现