http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
M. Mahmudzadeh,H. Yari,B. Ramezanzadeh,M. Mahdavian 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.78 No.-
Reduction of graphene oxide still is one of discussion subjects in scientific communities. The use of toxicchemicals like hydrazine is a well-known procedure for graphene oxide reduction. In this paper, a newecofriendly, fully scalable, and cheap approach with easy procedure on industrial scale for producingreduced graphene oxide is introduced. The studied method was based on successful reduction ofgraphene oxide by urtica dioica leaves’ extract in 1 h at 90 C. Raman spectroscopy evidenced thesignificant removal of considerable oxygen functional groups in graphene oxide after reduction. Improving corrosion properties by helping the functionalization ability of u. dioica leaves’ extract forsuperior dispersion in polyurethane coatings was studied as well. Electrochemical impedancespectroscopy measurements along with salt spray exposure test revealed the remarkable role ofresultant reduced graphene oxide in protective function of polyurethane coatings before and afteraccelerated weathering condition. Impedance value in low frequency diagrams reveals more than 99%protection efficiency indicating the great role of u. dioica in barrier property of PU coatings afteraccelerated weathering condition.