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Preparation method for nano-emulsion with stable polymers

A nanoemulsion and polymer technology, applied in drilling compositions, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor nanoemulsion stability, easy contamination of preparations, and high cost, and achieve a simple and easy preparation method. Operation, low energy consumption, low cost effect

Active Publication Date: 2015-05-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional high-energy preparation method of nanoemulsion can be mass-produced, it consumes high energy, has high cost, and is easy to contaminate the preparation; for the nanoemulsion prepared by the low-energy method, great progress has been made in recent years, but the prepared nanoemulsion is stable. Poor, generally requires additives to stabilize nanoemulsions

Method used

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  • Preparation method for nano-emulsion with stable polymers
  • Preparation method for nano-emulsion with stable polymers
  • Preparation method for nano-emulsion with stable polymers

Examples

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Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Preparation of partially hydrolyzed polyacrylamide (HPAM-1) stabilized nanoemulsion

[0044] The nanoemulsion is based on 100 parts by weight, and the components are as follows: 20 parts of liquid paraffin, 5.12 parts of nonionic surfactant Tween20, 4.88 parts of nonionic surfactant Span20, partially hydrolyzed polyacrylamide (average molecular weight is 12 million, degree of hydrolysis 18 %, abbreviated as HPAM-1) 7×10 -5 ~1.4×10 -2 parts, and the balance is water.

[0045] The preparation steps are as follows:

[0046] (1) Weigh 1.25g HPAM-1 and dissolve it in 250ml three times of water to prepare 0.5wt% HPAM-1 mother liquor.

[0047] (2) Weigh 1.28g of nonionic surfactant Tween20 and 1.22g of Span20 into a 30ml bottle, then add 5g of oil-phase liquid paraffin respectively, and stir at a temperature of 15-20°C and 1000-2000rpm at high speed for 5-10min. A total of 9 bottles (marked as A~I) ​​of nanoemulsion mixture were prepared.

[0048] (3) Sequentia...

Embodiment 2

[0050] Gained HPAM-1O / W emulsion changes trend figure and particle size distribution with polymer concentration change as image 3 As shown in (A,C), the surface tension of pure HPAM-1 aqueous solution and the O / W emulsion at the same concentration and the oil-water interfacial tension are as follows: Figure 4 As shown in (A,C), the zeta potential of the emulsion changes with the polymer concentration as Figure 5 As shown in (A), the viscosity of the emulsion changes with the shear rate at different polymer concentrations as follows Image 6 As shown in (A), the zero-shear viscosity of the emulsion changes at different polymer concentrations as Figure 7 Shown in (A). Example 2: Preparation of Hydrophobically Modified Polyacrylamide (HMPAM-1) Stabilized Nanoemulsion

[0051] The nanoemulsion is based on 100 parts by weight, and the components are as follows: 20 parts of liquid paraffin, 5.12 parts of nonionic surfactant Tween20, 4.88 parts of nonionic surfactant Span, hyd...

Embodiment 3

[0056] The trend graph and particle size distribution of HMPAM-1O / W emulsion with the change of polymer concentration are as follows image 3 As shown in (B, D), the surface tension of pure HMPAM-1 aqueous solution and O / W emulsion at the same concentration and the interfacial tension of oil and water are as follows: Figure 4 As shown in (B,D), the zeta potential of the emulsion changes with the polymer concentration as Figure 5 As shown in (B), the viscosity of the emulsion changes with the shear rate at different polymer concentrations as Image 6 As shown in (B), the zero-shear viscosity of the emulsion changes at different polymer concentrations as Figure 7 (B) shown. Example 3: Preparation of partially hydrolyzed polyacrylamide (HPAM-2) stabilized nanoemulsion

[0057] The nanoemulsion is based on 100 parts by weight, and the components are as follows: 20 parts of n-heptane, 5.12 parts of nonionic surfactant Tween 60, 4.88 parts of nonionic surfactant Span 60, parti...

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Abstract

The invention relates to a preparation method for nano-emulsion with stable polymers. The nano-emulsion comprises the following components in 100 parts by weight: 20-60 parts of oil phases, 5-10 parts of nonionic surfactants, 7*10<-5>-7*10<-2> parts of polymers and the balance of water. The preparation method comprises the following steps of: proportioning the nonionic surfactants into mixed emulgators by adopting a constant-temperature invert emulsion method, mixing the mixed emulgators with the oil phases, and dripping the mixture into aqueous phase containing the polymers under a high-speed stirring condition, so as to form the stable nano-emulsion. The preparation method has the characteristics that the components are simple, the operation is easy, the particle diameter of the prepared oil-in-water nano-emulsion is fine, the kinetic stability is durable, the energy consumption is small, and the cost is low.

Description

technical field [0001] The invention relates to a preparation method of a nanoemulsion, in particular to a low-energy preparation method of a polymer-stabilized nanoemulsion. Background technique [0002] Emulsion refers to the dispersion system in which the dispersed phase is dispersed in the continuous phase composed of another phase (non-solvent) in the form of small droplets. It is a thermodynamically unstable polydisperse system, and the diameter of the dispersed phase is generally between 0.1 and 10 μm. The emulsion with a diameter between 50 and 500 nm becomes a nanoemulsion. As a special type of emulsion, compared with ordinary emulsion, nanoemulsion has smaller droplet size, uniform dispersion, and certain dynamic stability. It can avoid obvious flocculation and coalescence within several months or even half a year. More excellent properties and application prospects. Therefore, nanoemulsion technology has penetrated into the fields of petrochemical industry, dail...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/00C09K8/584C09K23/00
Inventor 辛霞杨乔徐桂英任华英卢杭
Owner SHANDONG UNIV
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