学术通知
报告主题:Membrane-forming block copolymers with degradable blocks and linkers : Synthesis and self-assembly
报告人:Jeppe Madsen(Technical University of Denmark)
邀请人:王林格 教授
报告时间:2026年4月28日(星期二)上午10:00
报告地点:华南理工大学广州国际校区C3-c204
欢迎广大师生踊跃参加!
前沿软物质学院
华南软物质科学与技术高等研究院
广东省功能与智能杂化材料与器件重点实验室
软物质功能与智能杂化材料国际联合研究中心
2026年4月22日
报告摘要:
The synthesis, characterization and self-assembly behaviour of two types of amphiphilic block copolymer systems are presented: The first system comprises block copolymers of hydrophilic poly(ethylene glycol), PEG, and hydrophobic, crystalline poly(caprolactone), PCL. Specifically, a range of PEG-b-PCL deblock copolymers and PEG-b-PCL-b-PEG triblock copolymers were prepared with comparable hydrophilic (PEG) mass fractions of around 30 %. Self-assembly via direct hydration yielded mixed phases of micelles (spherical and/or worm-like) and vesicles, along with larger aggregates. The membranes of the vesicles based on diblock copolymers were thicker than those based on triblock copolymers for PCL blocks of comparable degrees of polymerization. This behaviour could be correlated with the restraints imposed on the crystallisation of PCL by the PEG blocks.
The second system comprises triblock copolymers of PEG and amorphous, hydrophobic poly(dimethyl siloxane), PDMS. These PEG-b-PDMS-b-PEG triblock copolymers were designed so that one PEG arm is connected to the PDMS block via a silyl ether bond that is prone to hydrolysis, whereas the other PEG arm is connected to PDMS through a hydrolytically stable carbosilane bond. The initial triblock had a hydrophilic (PEG) mass fraction of approximately 31 %, whereas full hydrolysis of the silyl ether leads to a PEG-b-PDMS diblock copolymer with a hydrophilic mass fraction of 22 % as well as free PEG. Thus, slow hydrolysis following direct hydration resulted in vesicles with an average diameter of 55 nm and a relatively narrow size distribution. The formation of such small vesicles is difficult to achieve by other means.
报告人简介:
Jeppe Madsen分别在丹麦哥本哈根大学获化学硕士学位、在英国谢菲尔德大学获高分子化学博士学位。他曾先后在谢菲尔德大学担任博士后研究员、在工业界担任研究员,并在丹麦技术大学任职。自2020年起,他担任丹麦技术大学丹麦聚合物中心的高级研究员。
Jeppe Madsen博士当前的研究兴趣包括特种聚合物与通用聚合物的合成、表征及应用。具体研究方向包括:利用废弃物和可再生资源制备聚合物、提高聚合物的可降解性,以及设计用于生物技术和光学等特定领域的专用聚合物。
丹麦技术大学(Technical University of Denmark)成立于1829年,由物理学家奥斯特创建,是丹麦哥本哈根大区的公立研究型大学,主校区位于灵比(Kgs. Lyngby),占地约375,000平方米,设有风能系、土木工程系等院系。该校作为世界上最古老的科技大学之一和丹麦培养高级工程技术人员的最主要学府,以师生比1:4著称,为北欧五校联盟和欧洲卓越理工大学联盟成员。2025年软科世界大学学术排名位列全球第109名。
