水によるリサイクルが可能で、丈夫で自己修復性のある糖ベースの超分子ネットワーク:メイラード様重合開始を利用
Siyang Li1, Tow-Jie Lok2, Shi-Han Ngo1
1Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China. wongtuckwhye@utm.my.
Materials horizons
|December 22, 2025
まとめ
麦芽糖とアクリルアミドを用いて、高性能ポリマーを製造するための持続可能な水系法を開発しました。これらの適応性のあるポリマーは、丈夫で自己修復性があり、水中で完全にリサイクル可能であり、先端材料にグリーンな代替品を提供します。
科学分野:
- ポリマー化学; 材料科学; グリーンケミストリー
背景:
- 架橋ポリマーは高度な特性を提供しますが、共有結合性適応ネットワーク(CAN)における不可逆的な架橋や限定的な可塑性により、リサイクルの課題に直面しています。CANの現在のリサイクル方法は、触媒を必要とし、固体状態での可塑性が限られていることが多く、持続可能性を妨げています。持続可能でリサイクル可能な高性能ポリマーの開発は、環境および産業用途にとって極めて重要です。
研究 の 目的:
- リサイクル可能で機能的なポリマーを作成するための、新規の水媒体重合戦略を導入すること。メイラード反応に着想を得た触媒フリーの水系反応を利用してポリマー合成を行うこと。水中で完全にリサイクル可能な、自己修復および再成形能力を持つ適応性ポリマーを開発すること。
主な方法:
- 麦芽糖を触媒および官能側鎖として使用した、アクリルアミド(AAm)の一段階水系重合を100℃未満で行いました。水素結合および動的なイミン結合を介した適応性官能化超分子ネットワーク(AFSN)の形成。引張強度、伸長率、破壊エネルギー、接着性能、自己修復能力を含むエラストマー特性のキャラクタリゼーション。
主要な成果:
- 高強度(最大5 MPa)、高伸長率(最大1000%)、高破壊エネルギー(36 kJ m⁻²)を持つAFSNの合成に成功しました。頑丈な接着性能(最大4.8 MPa)と室温での迅速な自己修復能力を実証しました。化学的劣化なしに、水のみを使用してエラストマーを完全に溶解し、繰り返し再加工することができました。
結論:
- 開発された水媒体重合は、高性能でリサイクル可能なポリマーへの持続可能で環境に優しいルートを提供します。AFSNは、多様な用途に適した優れた機械的および自己修復特性を示します。このアプローチは、廃棄物と環境への影響を削減する、グリーンポリマー化学の実用的なソリューションを提供します。
関連する概念動画
Dehydration Synthesis
147.9K
Overview
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...
147.9K
Hydrolysis
120.6K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
120.6K
Cationic Chain-Growth Polymerization: Mechanism
2.7K
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...
2.7K
Anionic Chain-Growth Polymerization: Overview
2.5K
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,...
2.5K
Anionic Chain-Growth Polymerization: Mechanism
2.4K
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...
2.4K
Step-Growth Polymerization: Overview
4.2K
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...
4.2K


