Polyzwitterions as a Versatile Building Block of Tough Hydrogels: From Polyelectrolyte Complex Gels to Double-Network Gels
| Autor: | Tasuku Nakajima, Tao Lin Sun, Jian Ping Gong, Yoshiyuki Saruwatari, Daniel R. King, Haiyan Yin, Takayuki Kurokawa |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Toughness
Chemical substance Materials science Polymers Surface Properties macromolecular substances Sulfonic acid law.invention Magazine law medicine Moiety General Materials Science Particle Size chemistry.chemical_classification Molecular Structure technology industry and agriculture Hydrogels Polyelectrolytes Polyelectrolyte chemistry Chemical engineering Self-healing hydrogels Sulfonic Acids Swelling medicine.symptom Gels |
| Zdroj: | ACS Applied Materials & Interfaces. 12:50068-50076 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | The high water content of hydrogels makes them important as synthetic biomaterials, and tuning the mechanical properties of hydrogels to match those of natural tissues without changing chemistry is usually difficult. In this study, we have developed a series of hydrogels with varied stiffness, strength, and toughness based on a combination of poly(2-acrylamido-2-methylpropane sulfonic acid) (PAMPS), a strong acidic polyelectrolyte, and poly-N-(carboxymethyl)-N,N-dimethyl-2-(methacryloyloxy) ethanaminium) (PCDME), a polyzwitterion with a weak acidic moiety. We demonstrate that modifying the true molar ratio, R, of PCDME to PAMPS results in four unique categories of hydrogels with different swelling ratios and Young's moduli. When R 6.5, a tough and stiff double-network gel (DN) is formed. Both the PEC and DN gels exhibit high toughness and fracture stress, up to 1.8 and 1.5 MPa, respectively. Importantly, the PEC gels exhibit strong recovery properties along with high toughness, distinguishing them from DN gels. Without requiring a change in chemistry, we can tune the mechanical response of hydrogels over a wide spectrum, making this a useful system of soft and hydrated biomaterials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|