水中の自己組み立て材料のためのアンフィフィリックコポリマーの自己分類:ポリマーは自分自身を認識することができます
Shota Imai1, Mikihito Takenaka2,3, Mitsuo Sawamoto1,4
1Department of Polymer Chemistry, Graduate School of Engineering , Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510 , Japan.
Journal of the American Chemical Society
|December 4, 2018
まとめ
ポリエチレングリコール (PEG) と水性鎖を持つアンフィフィリック共ポリマーには,ダイナミックな自己分類があり,異なるミセルを形成する. この自己認識行動により 選択的粘着で自己治癒する水素ガスを可能にします
科学分野:
- ポリマー化学
- 材料科学
- 超分子化学
背景:
- 溶液中のアンフィフィリックコポリマーは様々なナノ構造に自己組み立てられます.
- 競争条件下で自己組み立てを制御することは依然として課題です.
- ダイナミックな自己分類は ナノ構造を正確に形成するための新しいメカニズムを提供します
研究 の 目的:
- アンフィフィリックランダムコポリマーのダイナミックな自己分類行動を調査する.
- コポリマー組成とペンダントグループが自己分類に及ぼす影響を調査する.
- この現象を利用して 自己回復する水素ゲルのような 高度な材料を開発します
主な方法:
- ポリエチレングリコール (PEG) と水性アルキルペンダントによるアンフィフィリックランダムコポリマーの合成.
- ダイナミック・ライト・スキャッティング (DLS) と伝送電子顕微鏡 (TEM) を用いてミセルの特徴を決定する.
- ハイドロゲルの性質を評価するレオロギー研究
主要な成果:
- コポリマーは水性媒体,水ゲル,および表面での普遍的なダイナミック自己分類を示した.
- 自己分類はコポリマー組成とアルキルペンダントに依存し,離散的でサイズ制御されたミセルを形成した.
- 同様のポリマーミセルは,異なる対称性がある場合でも,鎖を交換します.
- ABAトライブロック共ポリマーには自己治癒性があり,選択的に粘着するヒドロゲル特性がある.
結論:
- ダイナミックな自己分類は,アンフィフィリックコポリマーの本質的な性質であり,その主要な構造によって決定される.
- この振る舞いは,制御された性質を持つよく定義されたナノ構造の作成を可能にします.
- 開発された材料は,自己治癒と選択的粘着を必要とするアプリケーションの可能性を示しています.
さらに関連する動画
関連する概念動画
Polymers
40.9K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
40.9K
Polymers
23.3K
23.3K
Characteristics and Nomenclature of Copolymers
3.3K
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...
3.3K
States of Water
56.8K
Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
56.8K
Protein Complex Assembly
16.8K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
16.8K
Members Made of Elastoplastic Material
400
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
As the bending moment...
400


