Modified nano-sio for copolymer flooding 2 monomer

Abstract

The invention relates to a modified nanometer SiO2 monomer used for polymer flooding. The monomer is prepared through the following steps: (1) reacting nanometer SiO2 with 3-aminopropyltriethoxysilane in an anhydrous toluene solution with a temperature of 80 to 100 DEG C for more than 12 h so as to obtain amino-modified nanometer SiO2, and controlling amino content on the surface of nanometer SiO2 by controlling the addition amount of 3-aminopropyltriethoxysilane; and (2) reacting excess maleic anhydride with amino-modified nanometer SiO2 so as to obtain modified nanometer SiO2 monomer with a reactive carbon-carbon double bond. The modified nanometer SiO2 monomer used for polymer flooding provided by the invention can quantitatively graft the carbon-carbon double bond with reaction activity on the surface of nanometer SiO2 as needed and can conveniently control the content of the grafted carbon-carbon double bond by controlling the content of a silane coupling agent containing amino.

Description

technical field [0001] The present invention relates to nanometer SiO 2 The technical field of surface modification, more specifically, the present invention relates to a kind of modified nano-SiO used for copolymer flooding 2 monomer. Background technique [0002] nano-SiO 2 Because of high specific surface energy, strong surface adsorption capacity, quantum size effect, macroscopic quantum tunneling effect, small size effect, and high temperature resistance, acid and alkali resistance, and non-toxic and environmentally friendly chemical properties, it is widely used as catalyst carrier, polymer material, etc. many industries. [0003] Such as figure 1 As shown, nano-SiO 2 It has a three-dimensional network structure, and its surface has a large number of hydroxyl groups in different states, so nano-SiO 2 The surface chemical activity is high, and it is easy to chemically react with the modifier, and using this special property, many modifiers with specific functional...

AI Technical Summary

Problems solved by technology

At present, although domestic and foreign research on nano-SiO 2 A large number of studies have been carried out on surface modification, but these studies mainly focus on qualitative aspects, mainly focusing on the effect of different modifiers on nano-SiO 2 and the influence of the properties of the prepared composites, while there is no literature report on nano-SiO 2 Quantitative control of the degree of surface modification

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