定义架构的块共聚的简单合成
1Department of Materials, University of California, Santa Barbara 93106, USA. tdeming@engineering.ucsb.edu
Nature
|December 6, 1997
概括
研究人员开发了一种新的聚合法,用于制造明确的块共聚. 这一突破使得基于的先进生物材料可以用于组织工程和药物输送应用.
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
- 生物材料工程 生物材料工程
背景情况:
- 像蛋白质这样的自然聚合物表现出层次结构,但合成块共聚物通常缺乏这种组织,原因是随机绕的链条.
- 在合成材料中实现更高水平的空间组织通常需要刚性棒聚合物,这些聚合物很难在大规模合成.
- 之前试图制造明确的块共聚合物的尝试受到副作用反应的阻碍,导致分子重量不一致.
研究的目的:
- 开发一种简单的聚合策略,以合成具有精确序列的块共聚.
- 克服当前方法的局限性,防止形成高度组织的基材料.
- 为了使新生物材料的创建,用于先进的应用.
主要方法:
- 使用有机启动器来控制聚合.
- 在合成过程中抑制不必要的链转移和终结副作用.
- 促进了具有明确序列和分子重量的块共聚的合成.
主要成果:
- 成功合成了具有可控序列的阻断共聚.
- 展示了避免常见副作用的聚合策略.
- 在形成块共聚合物的过程中实现了高精度.
结论:
- 经有机启动的聚合策略提供了一个简单的途径,以获得明确的块共聚.
- 这种方法克服了以前的合成挑战,为先进的生物材料铺平了道路.
- 潜在的应用包括组织工程,药物输送和生物模拟复合材料的形成.
相关概念视频
What are Proteins?
Proteins are polymers of amino acids linked together by peptide bonds. Proteins and polypeptides are interchangeably used to refer to long chains of amino acids. However, polypeptides have a molecular weight of fewer than 10,000 daltons, while proteins have greater molecular weight. Polypeptides with less than 20 amino acids are called oligopeptides or simply peptides. Interactions among the constituent amino acid side chains of proteins help them fold into a stable 3-dimensional structure...
Characteristics and Nomenclature of Copolymers
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...
Peptidoglycan Synthesis
Structure of PeptidoglycanPeptidoglycan is a vital structural component of the bacterial cell wall, providing mechanical strength and shape to the cell. It consists of repeating units of two sugars—N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)—linked by β-1,4 glycosidic bonds. These sugar chains are cross-linked by short peptide chains, forming a mesh-like polymer that surrounds the bacterial plasma membrane.Cytoplasmic Phase – Precursor SynthesisPeptidoglycan biosynthesis begins in...


