• 专利标题:   Preparing polycarboxylic acid-modified oxidized graphene composite comprises e.g. hydrolyzing alkyl hydroxy monomer, adding graphene oxide, carrying out radical polymerization of modified graphene and alkene-carboxy monomer.
  • 专利号:   CN106279580-A
  • 发明人:   WANG Q, LEE S W, WANG Y, WANG H, WANG J
  • 专利权人:   UNIV BEIJING CIVIL ENG ARCHITECTURE
  • 国际专利分类:   C04B103/30, C04B024/26, C08F220/06, C08F230/08, C08F283/06, C08F292/00
  • 专利详细信息:   CN106279580-A 04 Jan 2017 C08F-292/00 201726 Pages: 12 Chinese
  • 申请详细信息:   CN106279580-A CN10645852 08 Aug 2016
  • 优先权号:   CN10645852

▎ 摘  要

NOVELTY - Preparing polycarboxylic acid-modified oxidized graphene composite comprises (i) carrying out hydrolysis reaction of alkyl hydroxy monomer (III), then reacting with graphene oxide, where A group grafted on the surface of the graphene oxide, (ii) carrying out radical polymerization of modified graphene prepared in the step (i), alkene-carboxy monomer (I) and (II), compounding polycarboxylic acid molecule between the layers of the graphene oxide sheet to obtain final product. USE - The polycarboxylic acid-modified oxidized graphene composite is useful as water reducing agent in the hydration process of cement (the amount of the complex is 0.01-5 wt.% the weight of the gelling material) (claimed). ADVANTAGE - The polycarboxylic acid-modified oxidized graphene composite improves the workability of cement slurry, increasing the toughening effect, and improves the flexural and compressive strength of cement-based materials, and improve the early flexural strength. DETAILED DESCRIPTION - Preparing polycarboxylic acid-modified oxidized graphene composite comprises (i) carrying out hydrolysis reaction of alkyl hydroxy monomer of formula (III), then reacting with graphene oxide, where A group grafted on the surface of the graphene oxide, (ii) carrying out radical polymerization of modified graphene prepared in the step (i), alkene-carboxy monomer of formula (I) and (II), compounding polycarboxylic acid molecule between the layers of the graphene oxide sheet to obtain final product. R1 = H or group containing an unsaturated carbon-carbon bond; n = 200-500; R2 = H or methyl; R3 = H or -C(=O)OM; M = alkali metal ion, ammonium ion or organic amine group; X = Cl, methoxy, -OC2H5, OC2H4OCH3, OSiMe3 or -OAc; and A = alkenyl group. An INDEPENDENT CLAIM is also included for polycarboxylic acid-modified oxidized graphene composite obtained by above method.