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Method for synthesizing Janus nano particles by using Janus nano emulsion as template

A nanoparticle and nanoemulsion technology, which is applied in the preparation of microcapsule preparations and microspheres, can solve the problems of complex preparation process and achieve the effect of simple preparation process and high production efficiency

Active Publication Date: 2021-08-24
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of the above two patents first form Pickering emulsion to obtain single-sided particles, and then perform surface modification to obtain Janus nanoparticles. The preparation process is relatively complicated.

Method used

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  • Method for synthesizing Janus nano particles by using Janus nano emulsion as template
  • Method for synthesizing Janus nano particles by using Janus nano emulsion as template
  • Method for synthesizing Janus nano particles by using Janus nano emulsion as template

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Experimental program
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Effect test

Embodiment 1

[0029] 1) At room temperature, the oil phase (composed of oleic acid and silicone oil at a mass ratio of 1:1) and Tween surfactant at a mass ratio of 4:6 were mixed at a stirring speed of 700 rpm. Under the stirring speed, ultrapure water was added dropwise at a rate of 1.0 mL / h, and a molecular order with an amphiphilic bilayer structure, that is, lamellar liquid crystal, was formed through phase transition.

[0030] Authentication: from figure 1 It can be seen that during the preparation of the Janus nanoemulsion, a molecular order body with an amphiphilic bilayer structure is formed, and its polarized photo shows a typical cruciferous structure of lamellar liquid crystals. Depend on figure 2 It can be seen that the prepared lamellar liquid crystal does not flow after being inverted, which conforms to the macroscopic characteristics of lamellar liquid crystal.

[0031] 2) Continue to add ultrapure water to the above system until the content of ultrapure water accounts for...

Embodiment 2

[0034] 1) At room temperature, the oil phase (composed of oleic acid and silicone oil at a mass ratio of 1:1) and Tween surfactant at a mass ratio of 4:6, the same content of 4 wt% 1- Hydroxycyclohexylphenylacetone, different contents (0 wt%, 10 wt%, 20 wt%, 30 wt%, 40 wt%) of acrylate monomers were mixed at a stirring speed of 700 rpm. At this stirring speed, ultrapure water was added dropwise at a rate of 1.0 mL / h, and the final ultrapure water content was 90 wt% of the total mass of the emulsion.

[0035] Investigate the particle diameter of the prepared nanoemulsion as follows:

[0036] The particle size distribution of the Janus nanoemulsion before polymerization was measured by a ZEN3690 nanometer particle size analyzer from Malvern Company. The instrument uses a He-Ne laser light source with a wavelength of 632.8 nm. Before the test, the prepared nanoemulsion is diluted 50 times with ultrapure water to eliminate the multiple scattering phenomenon in the sample. The eq...

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Abstract

The invention discloses a method for synthesizing Janus nano particles by using a Janus nano emulsion as a template, and relates to the technical field of chemistry. The method comprises the steps: mixing an acrylate monomer, 1-hydroxycyclohexyl phenylacetone, oleic acid, silicone oil and a surfactant, and dropwise adding ultrapure water at the same time to form a molecular ordered combination body with an amphiphilic double-layer structure; continuously dropwise adding water to obtain the Janus nano emulsion with the double-sided structure, wherein the water content of the Janus nano-emulsion is 90-95 wt%; and putting the obtained product under ultraviolet light to initiate polymerization, and carrying out centrifugal washing and drying so as to obtain the Janus nano particles. The method is mild in preparation condition and simple and convenient to operate, and can be prepared by dropwise adding ultrapure water under stirring at room temperature and low speed and then performing ultraviolet irradiation, so that the large-batch production requirement is met.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a method for synthesizing Janus nanoparticles by using Janus nanoemulsion as a template. Background technique [0002] Compared with single-sided nanoemulsions, Janus nanoemulsions have more complex morphology and wider applications, mainly due to their multiple inner chambers, multiple interfaces, and the inner chambers are independent of each other. Therefore, Janus nanoemulsions have incomparable advantages over single-sided emulsions in terms of chemical isolation, controlled release of active ingredients, and templates for complex particles. Due to its small size, large specific surface area, and high dynamic stability, nanoemulsions are favored in the fields of biology, medicine, pesticides, and oil exploration. At present, the preparation methods of nanoemulsions are mainly high-energy emulsification method and low-energy emulsification method. [0003] So far...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14
CPCB01J13/14
Inventor 葛玲玲许万慧郭荣
Owner YANGZHOU UNIV
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