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相关概念视频

Characteristics and Nomenclature of Copolymers01:24

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...

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Updated: May 19, 2026

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
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Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

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纳米结构的块随机共聚物具有可调节的磁性特性.

Yongping Zha1, Hitesh D Thaker, Raghavendra R Maddikeri

  • 1Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.

Journal of the American Chemical Society
|August 9, 2012
PubMed
概括

研究人员合成了含有金属的块随机共聚合物,以创建室温铁磁材料. 通过调整和铁素的比率,他们调整了磁性,证明了双极相互作用.

科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 纳米技术纳米技术
  • 磁力学 磁力学 是一种

背景情况:

  • 具有纳米排序的区块共聚物 (BCP) 可以表现出室温铁磁性质.
  • 在BCP中,圆柱形相已显示出高强制性的潜力.
  • 了解纳米尺度形态和组成的作用对于设计磁性材料至关重要.

研究的目的:

  • 合成和研究含有金属的块随机共聚物.
  • 探索不同比例的和铁素对磁性特性的影响.
  • 阐明二极相互作用在纳米结构BCP中实现室温铁磁性的作用.

主要方法:

  • 使用环开放型转化聚合物合成块随机共聚合物.
  • 加入基功能化 (C16), (Co) 和铁素 (Fe) 单位.
  • 使用直流 (磁化与场,零场冷却,场冷却) 和交流感应度测量的磁性特性的表征.

主要成果:

  • 成功创建了具有可调节磁性质的纳米结构BCP材料.
  • 改变Co:Fe摩尔比率改变了纳米粒子密度和二极相互作用.
  • 随着密度的下降,观察到从室温铁磁转变为超偏磁的行为.

更多相关视频

Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
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Published on: July 9, 2015

Magnetic and Thermal-sensitive Poly(N-isopropylacrylamide)-based Microgels for Magnetically Triggered Controlled Release
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Magnetic and Thermal-sensitive Poly(N-isopropylacrylamide)-based Microgels for Magnetically Triggered Controlled Release

Published on: July 4, 2017

相关实验视频

Last Updated: May 19, 2026

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
09:12

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

Published on: June 1, 2016

Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
09:02

Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Published on: July 9, 2015

Magnetic and Thermal-sensitive Poly(N-isopropylacrylamide)-based Microgels for Magnetically Triggered Controlled Release
08:39

Magnetic and Thermal-sensitive Poly(N-isopropylacrylamide)-based Microgels for Magnetically Triggered Controlled Release

Published on: July 4, 2017

结论:

  • 这些纳米结构BCP的磁性特性通过控制稀释来有效调节.
  • 在相隔域内纳米粒子之间的双极相互作用是室温铁磁行为的关键.
  • 这项研究提供了通过受控共聚合物架构设计先进磁性材料的见解.