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Phase‐Separation‐Induced Anomalous Stiffening, Toughening, and Self‐Healing of Polyacrylamide Gels
Author(s) -
Sato Koshiro,
Nakajima Tasuku,
Hisamatsu Toshiyuki,
oyama Takayuki,
Kurokawa Takayuki,
Gong Jian Ping
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201502967
Subject(s) - materials science , toughening , phase (matter) , self healing , solvent , stiffening , polyacrylamide , dynamic mechanical analysis , polymer science , fracture (geology) , acrylamide , composite material , chemical engineering , polymer , polymer chemistry , copolymer , toughness , organic chemistry , medicine , chemistry , alternative medicine , pathology , engineering
Novel, tough, strong, and self‐healable polyacrylamide (PAAm) gels are fabricated by inducing an appropriate phase‐separation structure using a poor solvent. The phase separation induces a gel–glass‐like transition of the PAAm gels, providing the gels an anomalously high modulus (211 MPa), fracture stress (7.13 MPa), and fracture energy (4.16 × 10 4 J m −2 ), while keeping a high solvent content (≈60 vol%).