Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Polycarboxylic Acid-modified Graphene Oxide Compound As Well As Preparation Method and Application Thereof
Abstract The invention relates to a polycarboxylic acid-modified graphene oxide compound as well as a preparation method and application thereof. The preparation method of the ompound comprises the following steps: firstly, modifying graphene oxide, and enabling unsaturated bonds to be grafted on the surface of the graphene oxide; secondly, enabling the unsaturated bonds and carbon-carbon double bonds in a polycarboxylate superplasticizer to generate a free radical polymerization reaction under the action of an initiator, thereby compounding polycarboxylate superplasticizer molecules between graphene oxide lamellas. The weight-average molecular weight of the compound is 30,000 to 150,000g/mol; according to the compound, toughening and reinforcing effects of the graphene oxide on a cement based material can be played while working performance of cement mortar is improved, bending and compressive strengths of the cement based material are improved, and early bending strength is remarkably improved. 85 Mod-GO E 70 o C u / 1 I i I I i I III 4500 4000 3500 3000 2500 2000 1500 1000 500 Wavenumber (cm') Fig. 1 Mod-GO 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 20/a Fig. 2
Polycarboxylic Acid-modified Graphene Oxide Compound As Well As Preparation Method and Application Thereof
Abstract The invention relates to a polycarboxylic acid-modified graphene oxide compound as well as a preparation method and application thereof. The preparation method of the ompound comprises the following steps: firstly, modifying graphene oxide, and enabling unsaturated bonds to be grafted on the surface of the graphene oxide; secondly, enabling the unsaturated bonds and carbon-carbon double bonds in a polycarboxylate superplasticizer to generate a free radical polymerization reaction under the action of an initiator, thereby compounding polycarboxylate superplasticizer molecules between graphene oxide lamellas. The weight-average molecular weight of the compound is 30,000 to 150,000g/mol; according to the compound, toughening and reinforcing effects of the graphene oxide on a cement based material can be played while working performance of cement mortar is improved, bending and compressive strengths of the cement based material are improved, and early bending strength is remarkably improved. 85 Mod-GO E 70 o C u / 1 I i I I i I III 4500 4000 3500 3000 2500 2000 1500 1000 500 Wavenumber (cm') Fig. 1 Mod-GO 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 20/a Fig. 2
Polycarboxylic Acid-modified Graphene Oxide Compound As Well As Preparation Method and Application Thereof
WANG QIN (Autor:in) / LI SHI YU (Autor:in) / WANG YINGWEI (Autor:in) / WANG HONGWEI (Autor:in) / WANG JIAN (Autor:in)
25.03.2021
Patent
Elektronische Ressource
Englisch
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
C04B
Kalk
,
LIME
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