Polyamide and amine hybridized nanosilicon dioxide hyperbranched polymer and preparation method thereof

Abstract

The invention discloses a polyamide and amine hybridized nanosilicon dioxide hyperbranched polymer and a preparation method thereof. The preparation method of the polymer comprises the following steps of firstly, modifying the surface of nanosilicon dioxide by using a coupling agent; then, carrying out Michael addition reaction and amidation reaction on the modified nanosilicon dioxide by using ethylenediamine and methyl acrylate; finally, carrying out functional modification by using allyl glycidyl ether to obtain a functional polyamide and amine hybridized nanosilicon dioxide monomer, and initiating polymerization reaction on the functional polyamide and amine hybridized nanosilicon dioxide monomer, acrylamide, acrylic acid and a heat-resistant and salt-tolerant monomer by using a redox initiator or azobis(isobutylamidine) initiator. The hyperbranched polymer has a network structure with a polyamide and amine hybridized nanosilicon dioxide unit as a center, has excellent shear resistance, strong thickening property, heat resistance and salt tolerance, and is wide in adaptability and capable of being used as an oil displacement agent for increasing the recovery rate of raw oil in an oil field environment with a high mineralization degree and a wide temperature range; the preparation method of the polyamide and amine hybridized nanosilicon dioxide hyperbranched polymer is reliable in principle, simple and convenient to operate and wide in application prospect.

Description

technical field [0001] The invention relates to an inorganic nano silicon dioxide-organic macromolecule hyperbranched polymer and a preparation method thereof, belonging to the fields of new materials and oil field chemistry. Background technique [0002] As a non-renewable resource, petroleum occupies an irreplaceable strategic position in the fields of national security such as national defense and aerospace, industry, agriculture and daily life. However, in 2013, my country's dependence on foreign oil has exceeded 50%. Only by realizing the steady growth of my country's oil reserves can my country's energy security be guaranteed. So far, there are only a few newly discovered large oil fields in my country, and it takes a long time for new oil fields to form large-scale production capacity from exploration to development. Therefore, it is a feasible strategy to increase oil production on the basis of the development of existing oil fields. Program. Faced with the fact tha...

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Problems solved by technology

However, a large number of documents show that due to the hydrophobic properties of silica, only silane coupling agents are used to form monomers formed by nano-silica with poor hydrophilicity and low dispersion in aqueous solution, resulting in low monomer conversion during polymerization.

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