TY - JOUR
T1 - A waterborne uniform graphene-poly(urethane-acrylate) complex with enhanced anticorrosive properties enabled by ionic interaction
AU - Wang, Haihua
AU - Qin, Shudi
AU - Yang, Xiaofang
AU - Fei, Guiqiang
AU - Tian, Mi
AU - Shao, Yanming
AU - Zhu, Ke
PY - 2018/11/1
Y1 - 2018/11/1
N2 - Homogeneous dispersion of graphene (GR) in waterborne polymer matrix still remains a challenge. In this work, a novel strategy to prepare waterborne graphene/polymer nanocomposite of high uniformity and stability is developed via in situ incorporation of cationic graphene (CGR) in anionic poly(urethane-acrylate) (WPUA) prepolymer. Compared to WPUA and GR-WPUA, the water resistance, tensile strength and anticorrosive properties of CGR-WPUA are significantly increased. With respect to WPUA and GR-WPUA coatings with 0.5% GR addition, the impedance modulus at lower frequency decreased by one order of magnitude and the coating resistance decreased by two orders of magnitude after 25 days of immersion. While the impedance modulus and coating resistance of 0.5% CGR-WPUA are of the same order before and after immersion. The as-prepared CGR-WPUA coating was endowed with superior long-term anticorrosive properties. It is also found that the corrosion protection efficiency of CGR-WPUA increased by 78.2% in comparison to WPUA and increased by 32.0% compared with GR-WPUA. This work demonstrates the critical role of graphene-polymer interaction for anticorrosion applications of waterborne graphene/polymer nanocomposite
AB - Homogeneous dispersion of graphene (GR) in waterborne polymer matrix still remains a challenge. In this work, a novel strategy to prepare waterborne graphene/polymer nanocomposite of high uniformity and stability is developed via in situ incorporation of cationic graphene (CGR) in anionic poly(urethane-acrylate) (WPUA) prepolymer. Compared to WPUA and GR-WPUA, the water resistance, tensile strength and anticorrosive properties of CGR-WPUA are significantly increased. With respect to WPUA and GR-WPUA coatings with 0.5% GR addition, the impedance modulus at lower frequency decreased by one order of magnitude and the coating resistance decreased by two orders of magnitude after 25 days of immersion. While the impedance modulus and coating resistance of 0.5% CGR-WPUA are of the same order before and after immersion. The as-prepared CGR-WPUA coating was endowed with superior long-term anticorrosive properties. It is also found that the corrosion protection efficiency of CGR-WPUA increased by 78.2% in comparison to WPUA and increased by 32.0% compared with GR-WPUA. This work demonstrates the critical role of graphene-polymer interaction for anticorrosion applications of waterborne graphene/polymer nanocomposite
U2 - 10.1016/j.cej.2018.06.151
DO - 10.1016/j.cej.2018.06.151
M3 - Article
VL - 351
SP - 939
EP - 951
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -