24小时热门版块排行榜

返回列表

天要晴

铜虫 (小有名气)

应助: 0 (幼儿园)
金币: 1391.2
帖子: 98
在线: 112.8小时
虫号: 2923268

[交流] 法国图卢兹第三大学Softmat课题组拟招收2025年CSC国家公派博士生

法国图卢兹第三大学（Universite Toulouse III - Paul Sabatier) Softmat课题组Dr. Diana Ciuculescu-Pradines和Dr. Barbara Lonetti现根据实验室需求将招收CSC资助的公派博士生，预计于2025年9月或10月入学。关于Softmat课题组的更多信息可通过实验室网站进行了解：https://softmat.fr/en/。两位老师非常友善、耐心，有问题老师会积极帮你解决，课题组氛围活跃，欢迎感兴趣的同学加入我们。

研究课题：Polymers soft templates for synthesis of catalytic materials
研究背景：
Porous materials own remarkable structural features such as: large specific surface areas and pore volumes, tunable pore sizes and architectures, and a diversityof frameworks. These characteristics position them at the forefront of innovative andsustainable solutions to many of catalysis, energy storage, sensing, and biomedicine’s demands.
Current research on porous materials is facing several challenges, including the generation of well-controlled pore sizes and structures, precise characterization and ensuring their stability under real world conditions, such as harsh chemical environments or high temperatures.
To date, various synthetic protocols have been developed for synthetizing porous materials, including template-free, hard-templating and soft-templating approaches. While template-free strategies typically suffer from difficulties in tailoring the morphology and pore structures, the hard-templating one (such as preformed silica or carbon) suffer from tedious multi-steps procedures limiting their scalability. In contrast, soft templating offers a large versatility and can be ingeniously used for the replica of various functional porous materials [1, 2] with the possibility to easily remove the polymeric matrix in the end. For example, block copolymers (BCPs), with immiscible blocks, spontaneously assemble in selective solvents leading to nanostructures, such as vesicles, cubosomes and hexosomes. These assemblies are highly robust, have a high loading capacity and form mesopores in a wide scale range.[1] All these properties are advantageous to many host-guest interactions, but not yet fully exploited in the field of functional porous materials. Currently, most reported polymer cubosomes, (well-defined inverse bicontinuous cubic mesophases) consist of polystyrene block copolymers, whose selfassembly parameters are rather well understood. The channels of polymer cubosomes were effectively used in order to synthesize metal organic framework (MOFs) materials. [2] Other recent studies exploited these “soft templates” as versatile platforms for the synthesis of highly ordered nanoporous metal oxide with high specific surface area (up to 123 m2 g-1 for WO3), different well controlled pore structures of sizes ranging between 18 and 78 nm.[3] More interesting, Fe3O4-doped mesoporous carbon materials as cathode for the Li-S batteries were obtained by impregnation of the polymer cubosomes with Fe ions and plant polyphenols, as natural and nontoxic biomass ligands. These metal-polyols complexes are excellent precursors for the fabrication of carbon-based materials to be used in electrochemical-systems. [4]

研究内容：
1) To use copolymers alternative to polystyrene based ones to prepare polymer assemblies with ordered structures, acting as suitable soft templates for mineral charging.
Changing the chemical nature of the blocks is highly desirable to introduce greater functionality. However, knowledge of the impact of new chemistries on the selfassembly process remains limited and requires further investigation.
We have recently reported on a simple method to obtain controlled threedimensional hybrid architectures, formed by gold nanoparticles and a double hydrophilic block copolymer, specifically the poly(acrylic acid)-block-poly(N-vinyl-2-pyrrolidone) (PAA-b-PVP) (synthetised by RAFT polymerisation), directly in aqueous medium. [5]
We plan to test the incorporation of naturally occurring polyphenols in order to reinforce and modulate the structure of these assemblies.[6,7] Poly(ethylethylene phosphate)-b-polylactide (PEEP-b-PLA) will also be considered as interesting alternative.[8] This fully degradable copolymer forms highly ordered cubosomes and is particularly attractive for the mineral loading due to the expected favorable interactions with the metallic ions, while also guarantying environmental sustainability.
2) To prepare inorganic porous materials through the replication of the polymer template.
The open channels of the ordered cubosomes together with the chemical functions of the polymers are advantageous for host-guest interactions. Impregnation strategies are therefore straightforward and could be applied to produce a diversity of inorganic materials.
The polymer template could be subsequently removed by solubilization, degradation or pyrolysis.
3) To characterize the formed materials with a particular attention to the effect of the type, strength and dynamic nature of the interactions under varying conditions.
Understanding the role of diverse interactions involved will be essential to rationalize the different phenomena which govern the final structure of the material and fine-tune their properties for specific applications.

申请要求：
1). 候选人需具备分子化学及合成经验，有聚合物化学/材料科学背景者优先。熟悉相关表征技术，如nmr, IR, UV-vis, TEM和XRD等。
2) 候选人需具备熟练的英语听说读写能力和团队合作精神。

关于课题细节或申请细节，感兴趣的同学请直接联系：Diana Ciuculescu-Pradines (eliza.ciuculescupradines@univ-tlse3.fr, Barbara Lonetti (barbara.lonetti@univ-tlse3.fr).

Ref:　
[1] C.F. Grandes Reyes, S. Ha, K.T. Kim, Synthesis and applications of polymer cubosomes and　hexosomes, J. Polym. Sci. 61 (2023) 1196–1213.
[2] C. Li, Y. Pan, T. Xiao, L. Xiang, Q. Li, F. Tian, I. Manners, Y. Mai, Metal Organic Framework　Cubosomes, Angew. Chem. Int. Ed. 62 (2023) e202215985.
[3] W. Xie, X. Huang, C. Zhu, F. Jiang, Y. Deng, B. Yu, L. Wu, Q. Yue, Y. Deng, A Versatile　Synthesis Platform Based on Polymer Cubosomes for a Library of Highly Ordered Nanoporous　Metal Oxides Particles, Adv. Mater. 36 (2024) 2313920.
[4] H. Zhang, M. Zhang, R. Liu, T. He, L. Xiang, X. Wu, Z. Piao, Y. Jia, C. Zhang, H. Li, F. Xu, G.　Zhou, Y. Mai, Fe3O4-doped mesoporous carbon cathode with a plumber’s nightmare structure for　high-performance Li-S batteries, Nat. Commun. 15 (2024) 5451.
[5] M. Yon, B. Lonetti, S. Gineste, J. Perez, D. Goudouneche, L. Weingarten, J.-D. Marty, D.　Ciuculescu-Pradines, Easy reversible clustering of gold nanoparticles via pH-Induced assembly of　PVP-b-PAA copolymer, J. Colloid Interface Sci. 679 (2025) 9–19.
[6] J. Zhou, Z. Lin, Y. Ju, Md.A. Rahim, J.J. Richardson, F. Caruso, Polyphenol-Mediated Assembly　for Particle Engineering, Acc. Chem. Res. 53 (2020) 1269–1278.
[7] S. Quideau, D. Deffieux, C. Douat‐Casassus, L. Pouységu, Plant Polyphenols: Chemical　Properties, Biological Activities, and Synthesis, Angew. Chem. Int. Ed. 50 (2011) 586–621.
[8] S. Azhdari, J. Linders, D. Coban, T.J. Stank, C. Dargel, H. Gojzewski, T. Hellweg, A.H. Gröschel,　F.R. Wurm, Fully Degradable Polyphosphoester Cubosomes for Sustainable Agrochemical　Delivery, Adv. Mater. 36 (2024) 2406831.

回复此楼