形成孔隙的三臂两类块共聚物的合成和自组装
Sebastian Pusse1,2, Bart-Jan Niebuur3, Tobias Kraus3,4
1Department of Chemistry, Saarland University, 66123, Saarbrücken, Germany.
Macromolecular rapid communications
|February 24, 2025
概括
研究人员为新型多孔材料合成了两三臂块共聚合物 ((AB) 3-BCP). 这些先进的共聚合物表现出快速膨胀,显示了吸收材料和涂料的前景.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 两块共聚合物对于制造纳米结构材料至关重要.
- 控制的聚合技术可以精确合成复杂的聚合物结构.
- 自组装和相位分离是产生多孔结构的关键过程.
研究的目的:
- 合成具有可调节水友性含量的新型两三臂块共聚合物 ((AB) 3-BCP).
- 通过自组装和非溶剂诱导相分离 (SNIPS) 协议,从这些块共聚物制造多孔材料.
- 描述由此产生的多孔结构的形态学,自我组装行为和膨胀特性.
主要方法:
- 核心第一方法利用原子转移激素聚合 (ATRP) 进行受控合成.
- 自组装和非溶剂诱导相分离 (SNIPS) 用于多孔结构生成.
- 扫描电子显微镜 (SEM),传输电子显微镜 (TEM),小角度X射线散射 (SAXS) 和原子力显微镜 (AFM) 用于表征.
主要成果:
- 成功合成了 (AB) 3-BCP,其含有不同多2-基乙烯甲基酸盐 (PHEMA) 含量 (1538mol%).
- 在富含PHEMA的共聚物中观察到复杂的表面形态和不规则的片状散体微相.
- 多孔材料在浸泡在水中时表现出快速胀的行为,由时间解析的AFM测量证实.
结论:
- 这项研究提出了一条新的途径,用于两性三臂块共聚合物及其转化为多孔材料.
- 合成的共聚合物及其衍生的多孔结构对应用具有有前途的特性.
- 这些材料具有作为先进的吸收材料和功能性涂层的潜力,因为它们的调节性质和膨胀行为.
更多相关视频
11:42Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
Published on: June 20, 2019
7.7K
08:55Facile Protocol for the Synthesis of Self-assembling Polyamine-based Peptide Amphiphiles PPAs and Related Biomaterials
Published on: June 25, 2018
8.0K
相关概念视频
01:24Characteristics and Nomenclature of Copolymers
2.4K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
2.4K
00:57Cationic Chain-Growth Polymerization: Mechanism
2.2K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.2K
01:04Anionic Chain-Growth Polymerization: Mechanism
2.0K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
2.0K
01:28ATP and Macromolecule Synthesis
5.2K
Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
5.2K
01:03Step-Growth Polymerization: Overview
3.4K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
3.4K
01:20Anionic Chain-Growth Polymerization: Overview
2.0K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.0K