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関連する概念動画

Radical Chain-Growth Polymerization: Overview01:10

Radical Chain-Growth Polymerization: Overview

2.9K
Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...
2.9K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

3.0K
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this species into...
3.0K
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

8.7K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
8.7K
Radical Chain-Growth Polymerization: Chain Branching01:17

Radical Chain-Growth Polymerization: Chain Branching

2.2K
The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
2.2K
Radical Reactivity: Steric Effects01:10

Radical Reactivity: Steric Effects

2.2K
The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic...
2.2K
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

29.3K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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ポリペプチド有機ラジカル電池

Tan P Nguyen1, Alexandra D Easley2, Nari Kang2

  • 1Department of Chemistry, Texas A&M University, College Station, TX, USA.

Nature
|May 6, 2021
PubMed
まとめ
この要約は機械生成です。

研究者らは有機酸化還元活性物質を用いた ポリペプチドベースの新しい電池を開発しました この持続可能なバッテリー技術は 需要に応じた分解と再構築を可能にし 循環型経済への道を開きます

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Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
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Last Updated: Nov 6, 2025

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A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
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Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
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科学分野:

  • 材料科学
  • 電気化学
  • 持続可能な化学

背景:

  • リチウムイオン電池は近代的な技術をもたらしたが,鉱物の調達と廃棄に関する倫理的および環境的懸念を提起している.
  • 現在 リチウムイオン電池のリサイクル率は低いため 世界的な資源は圧迫されています
  • オーガニックベースのリドックス活性材料は,リチャージ可能なバッテリーに対する持続可能な代替手段です.

研究 の 目的:

  • 持続可能な有機材料を用いたポリペプチドベースの電池を開発する.
  • バッテリー寿命の終わりに 必要に応じて分解できる バッテリーを作ります
  • バッテリーの再構築のための環境に優しい,またはリサイクル可能な分解製品を探求する.

主な方法:

  • バイオゲンとニトロキシードラジカルをポリペプチドの骨格に酸化還元活性グループとして組み込む.
  • これらの改造されたポリペプチドをアノドとカトド材料として利用する.
  • 酸性環境でのポリペプチド電池の分解を調査する.

主要な成果:

  • メタルフリーで機能する ポリペプチドベースの電池を証明しました
  • レドックス活性ポリペプチドは,バッテリー操作中に安定性を示した.
  • 酸性環境での分解により アミノ酸やその他の再利用可能な構成要素が得られる.

結論:

  • ポリペプチドベースの電池は,グリーンで持続可能なエネルギー貯蔵に向けた重要な一歩です.
  • このアプローチは,循環経済の枠組みの中で代替的なバッテリー化学の必要性を解決します.
  • 開発されたバッテリー技術は,環境に配慮したバッテリー設計と寿命終末管理の道を提供します.