Physical Polyurethane Hydrogels via Charge Shielding through Acids or Salts,Macromolecular Rapid Communications

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Physical Polyurethane Hydrogels via Charge Shielding through Acids or Salts
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2018-01-31 , DOI: 10.1002/marc.201700711
Mai-Thi Leiendecker _{1,

2} , Christopher J. Licht ₃ , Jannik Borghs ₃ , David J. Mooney ₄ , Marc Zimmermann _{1,

2} , Alexander Böker _{1,

2}

Affiliation

Physical hydrogels with tunable stress‐relaxation and excellent stress recovery are formed from anionic polyurethanes via addition of acids, monovalent salts, or divalent salts. Gel properties can be widely adjusted through pH, salt valence, salt concentration, and monomer composition. We propose and investigate a novel gelation mechanism based on a colloidal system interacting through charge repulsion and chrage shielding, allowing a broad use of the material, from acidic (pH 4–5.5) to pH‐neutral hydrogels with Young's moduli ranging from 10 to 140 kPa.

中文翻译：

通过酸或盐的电荷屏蔽实现物理聚氨酯水凝胶

阴离子聚氨酯通过添加酸，一价盐或二价盐形成具有可调应力松弛和优异应力恢复能力的物理水凝胶。可以通过pH，盐价，盐浓度和单体组成广泛地调节凝胶性质。我们提出并研究了一种基于胶体系统的新型胶凝机制，该胶体系统通过电荷排斥和掩蔽作用相互作用，从而允许广泛使用该材料，从酸性（pH 4-5.5）到pH中性水凝胶，杨氏模量范围为10至140千帕

更新日期：2018-01-31

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