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A kind of pickering emulsion emulsifier and its preparation method and application

An emulsifier and emulsion technology, which is used in the preparation and application of nanomaterials, can solve problems such as low emulsion concentration, and achieve the effects of improving lipophilicity, reducing coalescence and good density.

Active Publication Date: 2020-07-14
辽宁兴东科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that current Pickering emulsions still need surfactants in the preparation process and the concentration of the prepared emulsions is low, the present invention provides a Pickering emulsion emulsifier with good lipophilicity and a contact angle of 90° without adding surfactant A high concentration of Pickering can be formed with a single agent, and the stability time is long

Method used

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  • A kind of pickering emulsion emulsifier and its preparation method and application
  • A kind of pickering emulsion emulsifier and its preparation method and application
  • A kind of pickering emulsion emulsifier and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Emulsifiers for Pickering emulsions were prepared using the following steps:

[0042] (1) 60 parts by weight of HAuCl 4 and 1 part by weight of M w 55kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 1 × 10 -2 MHAuCl 4 solution and concentration of 1 x 10 -7 The solution of PVP-DADMAN of M, mixed and boiled for 1h, then added 20 parts by weight of ascorbic acid, stirred and reacted in the dark at 98°C for 1h, centrifuged at 5000rpm for 5min to obtain the supernatant, the TEM picture of the supernatant is as follows figure 2 Shown; The supernatant was vacuum-dried to obtain modified gold nanoparticles with an average particle size of 45nm.

[0043] (2) 1 weight part of M w 1 kg / mol of PEOS is dissolved in 2 parts by weight of toluene as an oil phase; 2 parts by weight of the modified nano-gold prepared in step (1) is dissolved in water to make a solution with a concentration of 0.1% by mass; Add 0.4 parts by weight of n-butanol, drop dilute...

Embodiment 2

[0047] (1) 35 parts by weight of HAuCl 4 and 1 part by weight of M w 60kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 3 × 10 -3 MHAuCl 4 solution and concentration of 6 x 10 -6 The solution of PVP-DADMAN of M, mixed and boiled for 1h, then added 70 parts by weight of thiourea, stirred and reacted in the dark at 98°C for 1h, centrifuged at 10000rpm for 15min to obtain the supernatant, the TEM picture of the supernatant is as follows figure 2 Shown; The supernatant was vacuum-dried to obtain modified gold nanoparticles, with an average particle size of 43nm.

[0048] (2) 1 weight part of M w The PEOS that is 1.3kg / mol is dissolved in the xylene of 5 weight parts, as oily phase; The modified nano-gold prepared in step (1) is got 2.5 weight parts and is dissolved in water, and the concentration that makes mass percentage is 1% solution; add 1 weight part of propanol, drop dilute hydrochloric acid to adjust the pH to 2, as the water phase; add the w...

Embodiment 3

[0052] (1) 20 parts by weight of HAuCl 4 and 1 part by weight of M w 68kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 1 × 10 -4 MHAuCl 4 solution and concentration of 1 x 10 -5 The solution of PVP-DADMAN of M, mixed and boiled for 1h, then added 100 parts by weight of ascorbic acid, stirred and reacted in the dark at 98°C for 1h, centrifuged at 20000rpm for 30min to obtain the supernatant, the TEM picture of the supernatant is as follows figure 2 Shown; The supernatant was vacuum-dried to obtain modified gold nanoparticles with an average particle size of 40nm.

[0053] (2) 1 weight part of M w 3 kg / mol of PEOS is dissolved in 8 parts by weight of ethylbenzene as the oil phase; 0.2 parts by weight of the modified nano-gold prepared in step (1) is dissolved in water to make a solution with a concentration of 0.1% by mass Add 0.1 parts by weight of ethanol, add dropwise citric acid aqueous solution to adjust the pH to 4, as the water phase; add t...

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Abstract

The invention provides an emulsifier for Pickering emulsion. The inner core of the emulsifier is nano-gold particles grafted and modified by PVP-DADMAN and is embedded in PEOS; the mass ratio of nano-gold, PVP-DADMAN and PEOS is 4:1:2 to 2:3:10; the average diameter of the emulsifier is 35-75nm; and the shape of the emulsifier is irregular polygon. The emulsifier for the Pickering emulsion can beapplied to paper making, especially for preparing liquid paraffin emulsion for paper making. The emulsifier provided by the invention can obtain stable Pickering paraffin emulsion, and can effectivelyreduce coalescence between paraffin oil droplets, greatly improve emulsion stability and stabilize the emulsion for months without water phase and oil phase precipitation without the need to add anysurfactant and other modifiers, and the steps are simple and easy to operate.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation and application, in particular to an emulsifier capable of forming Pickering emulsion and its application in liquid paraffin emulsion. Background technique [0002] Emulsion is a dispersion system formed by dispersing one liquid in another immiscible liquid. It is mostly formed by mixing water-insoluble oil phase and water phase. It is used in papermaking, food, cosmetics, medicine and other industries. widely. Emulsion is a thermodynamically unstable system. In order to maintain the relative stability of the emulsion (kinetic stability), an emulsifier or stabilizer must be added during the emulsion preparation process. Traditional emulsifiers or stabilizers are mostly surfactants and surface-active polymers, which maintain the stability of the emulsion by reducing the interfacial tension between the oil-water two-phase liquid, providing a stable interfacial film and increasing the viscosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08L91/06C08G83/00
CPCC08G83/001C08J3/03C08J2391/06
Inventor 于得海王肖肖黄静王欢欢李玉洁任慧李国栋宋兆萍刘温霞王慧丽
Owner 辽宁兴东科技有限公司
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