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A method for preparing paraffin wax dispersion liquid and paraffin wax microspheres by using polymer microspheres produced in situ by precipitation polymerization as stabilizer

A technology of precipitation polymerization and polymer, which is applied in the field of Pickering emulsion preparation, can solve the problems of complex paraffin dispersion system, limitation of paraffin microspheres and its dispersion application, and difficulty in complete removal of additives, etc., to achieve industrial production and application , the experimental method is simple and easy, and the production cost is high

Inactive Publication Date: 2018-10-26
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of such a high amount of stabilizer not only makes the paraffin dispersion system very complicated, but also these additives are difficult to completely remove, which severely limits the application of paraffin microspheres and their dispersions, especially in the fields of biology and medicine

Method used

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  • A method for preparing paraffin wax dispersion liquid and paraffin wax microspheres by using polymer microspheres produced in situ by precipitation polymerization as stabilizer
  • A method for preparing paraffin wax dispersion liquid and paraffin wax microspheres by using polymer microspheres produced in situ by precipitation polymerization as stabilizer

Examples

Experimental program
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Effect test

Embodiment 1

[0041] At room temperature, 80g of water / ethanol mixed solvent with a mass ratio of 10 / 90, 20g of paraffin wax with a melting point of 68°C, 0.3g of dodecene, 0.1g of trimethylolpropane triacrylate and 0.004g of azobisiso Butyronitrile was added to the reactor separately. The reactor was sealed and shaken to disperse the monomer evenly, then placed in a constant temperature water bath shaker at 75°C, and reacted for 1.0 h at a vibration frequency of 330 osc / min to obtain a paraffin wax dispersion. Keep the vibration frequency constant, add room temperature water to the constant temperature water bath oscillator to solidify the paraffin droplet. Then the system was allowed to stand at room temperature, and the upper layer liquid was removed after the layers were separated. The lower solid was dried at 60°C to obtain paraffin microspheres. The optical microscope photograph of gained paraffin microsphere sees figure 1 , the particle size of the microspheres thus measured was 2...

Embodiment 2

[0043] At room temperature, add 60g of water / ethanol mixed solvent with a mass ratio of 20 / 80, 40g of paraffin wax with a melting point of 60°C, 1.0g of tetradecene, 0.6g of pentaerythritol triacrylate and 0.03g of azobisisoheptanonitrile into the reactor. The reactor was sealed and shaken to disperse the monomer evenly, then placed in a constant temperature water bath shaker at 80°C, and reacted for 1.0 h at a vibration frequency of 150 osc / min to obtain a paraffin wax dispersion. Keep the vibration frequency constant, add room temperature water to the constant temperature water bath oscillator to solidify the paraffin droplet. Then the system was allowed to stand at room temperature, and the upper layer liquid was removed after the layers were separated. The lower solid was dried at 55°C to obtain paraffin microspheres. The particle size of the obtained paraffin microspheres was 397 μm, and the polydispersity coefficient of the particle size was 1.055.

Embodiment 3

[0045] At room temperature, 80g of water / ethanol mixed solvent with a mass ratio of 40 / 60, 20g of paraffin wax with a melting point of 45°C, 0.1g of hexadecene, 0.1g of trimethylolpropane trimethacrylate and 0.004g of peroxide Dibenzoyl was added to the reactor separately. The reactor was sealed and shaken to disperse the monomer evenly, then placed in a constant temperature water bath shaker at 70°C, and reacted for 3.0h at a vibration frequency of 200osc / min to obtain a paraffin wax dispersion. Keep the vibration frequency constant, add room temperature water to the constant temperature water bath oscillator to solidify the paraffin droplet. Then the system was allowed to stand at room temperature, and the upper layer liquid was removed after the layers were separated. The lower solid was dried at 40°C to obtain paraffin microspheres. The microsphere particle size of the obtained paraffin wax is 305 μm, and the particle size polydispersity coefficient is 1.050.

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Abstract

The invention relates to a method for preparing a paraffin dispersion liquid and a paraffin microsphere from a polymer microsphere produced by precipitation polymerization in situ and adopted as a stabilizer. Unsaturated vinyl monomers and an initiator are added to a reactor containing paraffin and a water-ethanol mixed solvent, the paraffin microsphere is prepared from the unsaturated monomers by polymerization under conditions of a certain temperature and oscillation; a Pickering paraffin dispersion liquid can be prepared from the polymer microsphere formed in situ and adopted as the stabilizer by simple oscillation in one step; the system is left to stand for layering, the lower solid is dried, and the monodisperse paraffin microsphere is obtained. The polymer microsphere as the stabilizer is produced in situ by precipitation polymerization without further preparation of the special processes, the method is simple, high-speed homogenization equipment is not required in the whole process, and the production cost is significantly reduced. The stable paraffin dispersion liquid can be obtained with only a small quantity of stabilizer, the system composition is single, the surface of the obtained paraffin microsphere is clean, and the paraffin microsphere has wide application value in the fields of papermaking, building materials, biology, medicine and the like.

Description

technical field [0001] The invention relates to a method for preparing paraffin wax dispersion liquid and paraffin wax microspheres with polymer microspheres as a stabilizer, in particular to a method for preparing paraffin wax dispersion liquid and paraffin wax microspheres with polymer microspheres produced in situ by precipitation polymerization as a stabilizer The method belongs to the technical field of Pickering emulsion preparation. Background technique [0002] Due to its good sealing, insulation, plasticity, hydrophobicity, lubricity and flammability, paraffin wax has important application value in the fields of leather, papermaking, textile and daily chemical industry. In recent years, the use of paraffin chemicals such as chlorinated paraffins, adhesives, emulsifying waxes and fatty acids has opened up new ways for the development of paraffins. Emulsified paraffin wax refers to a relatively stable paraffin particle dispersion system formed by dispersing paraffin ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08J3/09C08J3/12C08F210/14C08F222/14C08F222/20C08L91/06
CPCC08F210/14C08J3/03C08J3/095C08J3/12C08J2391/06C08F222/14C08F220/20
Inventor 孔祥正姜绪宝肖作旭杨瑞娟
Owner UNIV OF JINAN
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