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Preparation method of SiO2 reinforced polymer microsphere

A polymer, enhanced technology, applied in drilling compositions, chemical instruments and methods, luminescent materials, etc., can solve the problems of restricting deformation characteristics, water absorption damage of shell polymers, etc., to achieve controllability, operation simple effect

Active Publication Date: 2018-02-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this core-shell structure restricts its deformation characteristics, and the shell polymer still has the problem of water absorption being damaged by shearing.

Method used

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  • Preparation method of SiO2 reinforced polymer microsphere
  • Preparation method of SiO2 reinforced polymer microsphere
  • Preparation method of SiO2 reinforced polymer microsphere

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Accurately weigh 0.5g nano-SiO 2 Particles (average particle size 30nm) were ultrasonically dispersed in 50mL ethanol, mixed with 5mL deionized water, and then poured into a three-necked flask with a condenser. Then 30 g of 3-(methacryloyloxy)propyltrimethoxysilane (MPS) and 6 drops of ammonia water were added dropwise to the system. Set the constant temperature water bath to 50°C, and blow nitrogen gas, and then continue to stir for 24h. After the reaction is over, take out the solution, let it stand for 24 hours until the reaction product is completely precipitated, and wash it again with ethanol, then put it in an oven at 50°C and dry it to constant weight to obtain the modified nano-SiO 2 particles.

[0045] figure 1 nano-SiO 2 Infrared spectra before and after modification, in SiO 2 In the infrared spectrum before modification, 1631cm -1 and 3431cm -1 The peak at is SiO 2 Characteristic peak of surface hydroxyl groups; 1097cm -1 and 798cm -1 The peaks at ...

Embodiment 2

[0047] In this embodiment, a SiO 2 Reinforced polymer microspheres, by mass:

[0048] Modified nano-SiO 2 0.2g; acrylamide 6g; acrylic acid 6g; temperature-resistant functional monomer 0.87g; salt-resistant functional monomer 1.178g; fluorescent tracer monomer 0.02g; initiator 4mL; cross-linking agent 0.52g; Regulator (0.51mL sodium hydroxide 0.68mL sodium chloride), distilled water 19.822g, aviation kerosene 120mL; dispersant 2.4g.

[0049] The modified nano-SiO used 2 Nano-SiO modified by modifier 3-(methacryloyloxy)propyltrimethoxysilane 2 , the average particle size is 40nm;

[0050] The temperature-resistant functional monomer used is 4-styrenesulfonic acid sodium salt;

[0051] The salt-tolerant functional monomer used is [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfonic acid propyl) ammonium hydroxide;

[0052] The fluorescent tracer monomer used is acryloxycoumarin (AMCO) monomer;

[0053] The initiator used is 15wt% ammonium persulfate;

[0054] The crosslinkin...

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Abstract

The invention discloses a SiO2 reinforced polymer microsphere having an interpenetrating network structure. The microsphere is formed by silica and an acrylamide-acrylic acid copolymer, and has a three-dimensional network structure formed by cross-linking acrylamide-acrylic acid copolymerization long chains, nano-silica particles and the acrylamide-acrylic acid copolymerization long chains are connected through chemical bonds and are uniformly dispersed in the three-dimensional network structure, and the acrylamide-acrylic acid copolymerization long chains also comprise a salt-resistant monomer and a temperature-resistant monomer. The microsphere also comprises fluorescence monomers uniformly distributed in the acrylamide-acrylic acid copolymerization long chains. The particle size range of the SiO2 reinforced polymer microsphere is 1-200 [mu]m. The SiO2 reinforced polymer microsphere has excellent shear resistance, and has good deformability after absorbing water.

Description

technical field [0001] The invention relates to the field of oilfield profile control and water shutoff agents, in particular to a SiO 2 Reinforced polymer microsphere preparation method. Background technique [0002] In recent years, with the deepening of oilfield development, the heterogeneity of heterogeneous reservoirs is stronger, the remaining oil is widely distributed, water flooding and water channeling are serious, and the injected fluid circulates ineffectively. Conventional profile control methods are difficult to achieve effective Plugging, polymer microsphere deep control and flooding technology has become a hot topic of research by experts and scholars at home and abroad as a new type of enhanced oil recovery technology. Polymer microspheres, as a good deep-seated flood control agent, are prepared on the ground, avoiding shear, dilution and chromatographic separation, which lead to the inability of conventional gel cross-linking systems to cross-link undergrou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K8/50C09K8/516C09K11/06
CPCC08G83/001C09K8/50C09K8/516C09K11/06C09K2211/145
Inventor 杨红斌康万利唐雪辰朱洲王鹏祥张向峰高永博
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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