Details

Autor(en) / Beteiligte

• Zhou, Tao
• Zhang, Jin
• Zhao, Jianguo
• Qu, Wenshan
• Li, Xinyu
• Li, Shijie
• Xing, Baoyan
• Fu, Yongchun

Titel

In-situ grafted graphene oxide-based waterborne epoxy curing agent for reinforcement corrosion protection of waterborne epoxy coating

Ist Teil von

• Surface & coatings technology, 2021-04, Vol.412, p.127043, Article 127043

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Well-dispersed graphene oxide (GO) in resin matrix has been found for improving corrosion protection performance of the coatings. In this paper, a new strategy relying on waterborne epoxy curing agent contained GO (GO-WCA) was developed, which was prepared via endcapping, modifying and in-situ grafting process. Wherein, endcapping includes blocking the high-activity hydrogen which is used to modulate curing activity. And the modifying process introduces homologous epoxy segment so as to improve compatibility between curing agent, resin matrix and GO. Attributing to this evolvement of WCA and superior barrier effects of GO, the epoxy coatings cured by GO-WCA exhibit desirable corrosion protection capacity. Besides, the failure mode is discovered as bubbling. This environmentally-friendly waterborne curing agent, only with 4.2 g/L VOC content, is anticipated to become available in diverse waterborne epoxy coatings system with excellent barrier property. [Display omitted] •A strategy of GO-epoxy coating by waterborne curing agent contained GO is presented.•GO-WCA was synthesized by endcapping, modifying and in-situ grafting process.•Modulating curing activity and compatibility promote anticorrosive ability.•The failure mode of GO-containing coatings is discovered as surface powdering.