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

基本信息

批准号：
1934429
负责人：
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

项目摘要

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

该项目将结合琼斯小组在制备路易斯酸性金属络合物方面的专业知识，并将其用于生产新型生物聚合物。最近，一些引发剂已被证明比其他系统更加活跃，并且能够在工业相关条件下工作。该项目将分为几个部分：1。配体修饰和改变金属中心（化学巴斯/卡迪夫）。这将涉及配体家族的扩展（不同的空间、电子）并将其与一系列金属中心络合。2．均聚和共聚将针对环酯（丙交酯、己内酯、丁内酯）的均聚以及在工业相关条件（高温和无溶剂）下环氧化物/CO2 和环氧化物/酸酐的共聚来筛选配合物。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用于共聚。据推测，这将导致嵌段共聚物或交替共聚物，具体取决于反应率。实现高度交替共聚物所需的精确条件是一个人们知之甚少的领域，因此将是一个值得探索的有趣途径。3．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。最初我们将重点研究聚酯{聚丙交酯-PLA}。将塑料丢弃到垃圾填埋场会导致材料价值的损失，还会造成环境问题。开发能够回收聚合物以回收单体（或有用的化学原料）的技术势在必行。这可能可以通过催化解聚来实现