Journal
POLYMER
Volume 87, Issue -, Pages 73-80Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2016.01.069
Keywords
Polyacrylamide hydrogel; Hydrophobic crosslinking; Double network hydrogel; Mechanical strength
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Funding
- National Natural Science Foundation of China (NNSFC) [11575009, 21471161]
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Tough polyacrylamide gel containing hydrophobic crosslinking (HPAAm gel) was easily synthesized by gamma-radiation induced micelle copolymerization and crosslinking of a hydrophobic monomer, stearyl acrylate (STA), and acrylamide. HPAAm gel could still keep intact after compressed to the strain of 0.9 while the corresponding polyacrylamide gel prepared by adding chemical crosslinker has been broken. Meanwhile, elongation at break of HPAAm gel could reach 1000%, which is also much higher than conventional polyacrylamide gels, indicating the high toughness of HPAAm gel. Furthermore, double network polyacrylamide hydrogel containing hydrophobic crosslinking (DN-HPAAm) was synthesized by incorporating another PAAm network into the prepared HPAAm gel. The resultant DN-HPAAm gel has much better compression strength (similar to 2 MPa) than HPAAm gel and a good cycle compression property. (C) 2016 Elsevier Ltd. All rights reserved.
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