F127DA micelle cross-linked PAACA hydrogels with highly stretchable, puncture resistant and self-healing properties
| Autor: | Quan Zhou, Akram Yasin, Haiyang Yang, Yunfei Liu, Kang Peng, Wanfu Zhou |
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| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
Materials science General Chemical Engineering 02 engineering and technology General Chemistry Poloxamer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Micelle 0104 chemical sciences Chemical engineering Self-healing Ultimate tensile strength Self-healing hydrogels Polymer chemistry Copolymer medicine Swelling medicine.symptom 0210 nano-technology |
| Zdroj: | RSC Advances. 7:29489-29495 |
| ISSN: | 2046-2069 |
| Popis: | It is highly desirable to develop hydrogels that possess excellent mechanical properties and self-healing ability. In this study, a highly stretchable, puncture resistant and self-healing hydrogel is prepared, via in situ copolymerization of a functional monomer, N-acryloyl-6-aminocaproic acid (AACA), and Pluronic F127 diacrylate (F127DA) as macro-cross-linkers in aqueous solution at 50 °C. Owing to the toughness-enhancement mechanism induced by F127DA micelles, the elongation ratio and tensile strength at break of the optimal hydrogel reach up to 2500% and 69 kPa, respectively. Meanwhile, a stab test shows that the hydrogels can be stabbed by a steel needle without any damage. What's more, the hydrogels exhibit excellent self-healing ability, due to multiple hydrogen bonding between protonated PAACA groups. And the hydrogels show pH-responsive cyclic swelling and de-swelling behaviors because of the pH sensitivity of AACA. Thus, the present hydrogels would provide new opportunities with regard to the design and practical application of hydrogel systems. |
| Databáze: | OpenAIRE |
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