Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for modifying graphene oxide
The invention discloses a method for modifying graphene oxide. According to the method, the surface of graphene oxide is modified, so that graphene oxide can be uniformly dispersed in cement paste. The method mainly comprises the following steps: putting a 0.2-5mg/ml graphene oxide dispersed liquid into a water bath pot of 60-80 DEG C, dropwise adding a polycarboxylate-type high-efficiency water reducing agent of which the mass is 6-8 times that of graphene oxide while the graphene oxide dispersed liquid is stirred, and after the reaction is completed, performing ultrasonic treatment for 0.5-1 hour, thereby obtaining modified graphene oxide. As the polycarboxylate-type high-efficiency water reducing agent is adopted to modify graphene oxide, PC is grafted on the surface of graphene oxide through covalence action, and the adsorption degree of a graphene oxide nanosheet layer to Ca<2+> is reduced, the problem that a graphene oxide adhesive can be coagulated in the presence of positive charge Ca<2+> can be solved, and furthermore the graphene oxide can be uniformly and stably dispersed in early-age cement paste.
Method for modifying graphene oxide
The invention discloses a method for modifying graphene oxide. According to the method, the surface of graphene oxide is modified, so that graphene oxide can be uniformly dispersed in cement paste. The method mainly comprises the following steps: putting a 0.2-5mg/ml graphene oxide dispersed liquid into a water bath pot of 60-80 DEG C, dropwise adding a polycarboxylate-type high-efficiency water reducing agent of which the mass is 6-8 times that of graphene oxide while the graphene oxide dispersed liquid is stirred, and after the reaction is completed, performing ultrasonic treatment for 0.5-1 hour, thereby obtaining modified graphene oxide. As the polycarboxylate-type high-efficiency water reducing agent is adopted to modify graphene oxide, PC is grafted on the surface of graphene oxide through covalence action, and the adsorption degree of a graphene oxide nanosheet layer to Ca<2+> is reduced, the problem that a graphene oxide adhesive can be coagulated in the presence of positive charge Ca<2+> can be solved, and furthermore the graphene oxide can be uniformly and stably dispersed in early-age cement paste.
Method for modifying graphene oxide
GUO XINLI (Autor:in) / ZHAO LI (Autor:in) / LI QI (Autor:in) / ZHANG HONGYI (Autor:in) / GUO LIPING (Autor:in) / SHU XIN (Autor:in) / LIU JIAPING (Autor:in)
02.09.2015
Patent
Elektronische Ressource
Englisch
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