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A kind of preparation method of janus organic pigment particles with amphiphilic

An organic pigment and amphiphilic technology, which is applied in the direction of organic dyes, can solve the problems of difficulty in preparing structural organic pigment Janus particles, product particle morphology, and structure, and achieve compatibility retention, bright colors, and reduced The effect of the scattering effect

Active Publication Date: 2021-08-03
ZHEJIANG SCI-TECH UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation principle of the second type of Janus nanoparticles is derived from the phase separation of two different substances under the change of the external environment. This substance is usually two polymers, or a polymer and an inorganic material, but the preparation of this method The condition is that the two substances can undergo phase separation during the preparation process, and the morphology and structure of the product particles are greatly affected by a single component
However, due to the irregular geometric shape of organic pigments, it is difficult to prepare organic pigment Janus particles with regular structures by general methods.

Method used

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  • A kind of preparation method of janus organic pigment particles with amphiphilic
  • A kind of preparation method of janus organic pigment particles with amphiphilic
  • A kind of preparation method of janus organic pigment particles with amphiphilic

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Embodiment Construction

[0036] Below in conjunction with Comparative Example 1 and Embodiments 1 to 13 the present invention is further described, the steps are as follows:

[0037] like Figure 5 As shown, according to the organic pigment aqueous dispersion A described in Table 1 as the raw material, add an emulsifier, stir for 15 minutes, then add the solid paraffin in the proportion shown in Table 1, and heat the solution until the paraffin melts at 70°C. Then use an ultrasonic cell pulverizer to ultrasonically emulsify for 8 minutes at a power of 300W to obtain a Pickering emulsion with stable organic pigment fine particles.

[0038] Cool the Pickering emulsion to a room temperature of 25° C., solidify the paraffin, and then centrifuge at a speed of 1500 rpm. After removing the supernatant, the fixed organic pigment particle dispersion B is obtained.

[0039] According to the formula in Table 2, adjust the pH of the fixed organic pigment particle dispersion B to 8.0-10.0 with ammonia water, and ...

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Abstract

The invention discloses a method for preparing Janus organic pigment particles with amphiphilicity, comprising: preferably using organic pigments as a stabilizer, adding an emulsifier to obtain a Pickering emulsion; fixing the organic pigment particles by cooling and solidifying the Pickering emulsion of paraffin wax, and then Part of the organic pigment particles exposed to water are hydrophilically modified, while the organic pigments embedded in paraffin wax maintain their original characteristics; paraffin wax is dissolved to obtain amphiphilic Janus organic pigment particles that are both hydrophilic and lipophilic. The present invention is based on the Pickering emulsion stabilized by organic pigment particles as a template, and the organic pigment is modified on one side. The modified pigment particles obtained have a typical Janus structure, that is, the surface wettability of the organic pigment and the easy dispersibility of the water phase are increased. It also retains the hydrophobic properties of pigments and improves the coloring effect of organic pigments on polymer coatings.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a method for preparing amphiphilic Janus organic pigment particles. Background technique [0002] In recent years, particles with anisotropy or surface properties (Janus particles) have had a huge impact in the fields of materials science, biomedicine, and high-performance biosensors by virtue of their novel morphology. The word "Janus" originated from the ancient Greek double-faced Roman god "Janus", which refers to a chemical particle with two different chemical or polarity faces. The most attractive aspect of Janus particles is its asymmetric structure, because there are two different regions in Janus particles at the same time, which means its controllable self-assembly and surface activity, for example, it can be designed to have different hydrophobicities in the same particle . In addition, Janus nanocomposites have uniform size, unique surface properties, spatially separate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/46C09B67/02C09B67/08C09B67/10C09B67/20
CPCC09B67/0008C09B67/0013C09B67/0014C09B67/006C09B67/0069C09B67/0086C09B67/0088C09B67/0089C09B67/009C09B67/0091C09B67/0097
Inventor 戚栋明谢子文李家炜陈智杰黄卓冯梦龙
Owner ZHEJIANG SCI-TECH UNIV
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