| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| One-step Preparation of High-strength and Self-healing Poly (Acrylic Acid)/Poly (Allyl Amine) Hydrogels |
| LAN Jun1, LIU Qiao2, CHEN Chongyi1
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1 College of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211
2 School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315016 |
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Abstract Poly (acrylic acid)/poly (allyl amine) (PAAc/PAH) hydrogels were prepared via one-step free radical polymerization and characterized by mechanical testing and rheometer. The results indicated that multiple ionic bonds including strong and weak interaction were formed between the carboxyl groups of poly (acrylic acid) and the amino groups of poly (allyl amine). The weak ionic interaction breaks to dissipate the energy generated during the hydrogels stretching, consequently, the PAAc/PAH hydrogels exhibit excellent mechanical strength and toughness. The reversible ionic bonding also endows PAAc/PAH hydrogels with quick self-healing ability. The addition of counter-ions weakens the electrostatic interactions between polyelectrolytes to impair the strength of hydrogels, and the hydrogels can be recover to original mechanical properties after removing the counter-ions via dialysis. Therefore the cut hydrogels can be healed effectively by usage of saline and recovered to relatively high mechanical strength and toughness.
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Published: 28 April 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (21404062, 21604044), the Natural Science Foundation of Ningbo (2017A610056) and K.C.Wong Magna Fund in Ningbo University. |
| About author:: Jun Lan, received his M.S. degree in June 2018 from Ningbo University in engineering, focusing on the research of polypeptide hydrogels.; Chongyi Chen, received his Ph.D. degree in polymer chemistry from Institute of Chemistry (CAS) in 2013. He is currently an associate professor in Ningbo university. His research interests are bioinspired tough hydrogel and polypeptide materials. |
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2019, Vol. 33 
