生体組織へのウェットな密着性を可能にする両性イオンポリウレタン薄膜
Mengyao Zhong1, Xingyu Liu2, Xiuqiang Li1
1School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China. zhanghong@tju.edu.cn.
Materials horizons
|February 10, 2026
まとめ
新しい両性イオンポリウレタン(ZWPU)薄膜は、動的な生体組織に対して優れたウェットな密着性を実現します。この進歩は、水和層による密着性を向上させることで、埋め込み型生体エレクトロニクスおよび生体インターフェースを強化します。
科学分野:
- 生体材料科学
- 高分子化学
- 生体エレクトロニクス
背景:
- 動的で変形可能な生体組織へのin vivoでの密着性を実現することは、現在の表皮エレクトロニクスにとって大きな課題です。
- 従来のポリマー薄膜は、濡れた生体表面での密着性が不十分なため、in vivoでの性能に限界があります。
研究 の 目的:
- 動的な生体組織への密着性を向上させるための新しい材料を開発すること。
- 生体エレクトロニクス用途のための両性イオンポリウレタン(ZWPU)薄膜の特性とin vivoでの性能を調査すること。
主な方法:
- スルホンをポリウレタンにグラフトさせて両性イオンポリウレタン(ZWPU)を合成すること。
- バーコーティングを用いて大面積のZWPU薄膜(厚さ200-1200 nm)を製造すること。
- 機械的特性、防汚性、および動的な生体組織へのin vivoでの密着性を評価すること。
主要な成果:
- ZWPU薄膜は、高い弾性(破断伸長率>500%)と優れた防汚特性を示します。
- 両性イオン基は水和層を促進し、「液体ブリッジ」効果と「分子ブリッジ」効果の相乗効果により、ウェットな生体組織への密着性を向上させます。
- 浮腫マウス脳および拡張したウサギ肺上で、スリップや破壊なしに最大150%の伸長に耐える、前例のない密着性を実証しました。
結論:
- ZWPU薄膜は、動的な生体組織に対して優れたウェットな密着性を提供します。
- 開発された材料は、高度な埋め込み型生体エレクトロニクスおよび生体インターフェースに大きな可能性を示しています。
- 水和層メカニズムは、生体界面相互作用を改善するための新しい戦略を提供します。
関連する概念動画
Conformity
48.2K
Conformity is the change in a person’s behavior to go along with the group, even if that person does not agree with the group.
48.2K
Adhesion
44.6K
Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
Capillary action is a result of water’s adhesive tendencies. When a narrow...
Capillary action is a result of water’s adhesive tendencies. When a narrow...
44.6K
Conformations of Butane
18.2K
Unlike ethane and propane that have only two major conformations, butane has more than two conformers. The staggered form of butane in which the bulky methyl groups on the two carbons are placed on opposite sides, that is, at a dihedral angle of 180°, is the lowest energy, most stable form — called the anti conformer. This conformation is stabilized due to the absence of steric repulsion between the largely spaced out methyl groups. The other two staggered conformations are...
18.2K
Conformations of Cycloalkanes
14.7K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
14.7K
Conformations of Cyclohexane
15.8K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
15.8K
Conformations of Ethane and Propane
17.4K
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this rotation, called the internal rotation, ethane has two major conformations — staggered and eclipsed.
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
17.4K


