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A method for preparing paraffin dispersion and paraffin microspheres by using polymer microspheres as stabilizers

A polymer and dispersion technology, applied in the field of Pickering emulsion preparation, can solve the problems of lengthy process, complex system, high dosage of stabilizer, etc., and achieve the effect of short required time, simple experimental process and clean ingredients

Inactive Publication Date: 2018-08-28
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of high stabilizer dosage, complex system, lengthy process, high-speed homogenization equipment and different sizes of obtained paraffin microspheres in the process of preparing paraffin dispersion liquid and paraffin microspheres in the prior art, the present invention provides a A Simple Method for the Rapid Preparation of Paraffin Wax Dispersions and Paraffin Wax Microspheres Using Minimal Levels of Stabilizers and No High-Speed ​​Homogenization Equipment

Method used

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  • A method for preparing paraffin dispersion and paraffin microspheres by using polymer microspheres as stabilizers
  • A method for preparing paraffin dispersion and paraffin microspheres by using polymer microspheres as stabilizers
  • A method for preparing paraffin dispersion and paraffin microspheres by using polymer microspheres as stabilizers

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Experimental program
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Effect test

Embodiment 1

[0045] Preparation of polymer microspheres by precipitation polymerization: first add 98.0 g of water / ethanol mixed solvent with a mass ratio of 10 / 90 to a 120 mL glass reaction bottle at room temperature, and then add 1.4 g of dodecene and 0.6 g of trimethylol Propane triacrylate and 0.04 g of azobisisobutyronitrile were shaken evenly, and the reaction bottle was sealed and placed in a constant temperature water bath shaker at 70° C., and reacted at a vibration frequency of 120 osc / min for 4 hours. The product was centrifuged with a high-speed centrifuge at 8,000 rpm for 5 min, and the microspheres were washed twice with ethanol, and then dried in an oven at 100° C. for 5 h to obtain polymer microspheres. The scanning electron micrographs of the obtained polymers are shown in figure 1 , the particle size of the microspheres thus measured was 1.3 μm, and the particle size polydispersity coefficient was 1.010.

[0046] Preparation of paraffin dispersion and paraffin microspher...

Embodiment 2

[0048] Polymer microspheres were prepared according to the method described in Example 1.

[0049] Preparation of paraffin wax dispersion and paraffin wax microspheres: Add 0.2 g of polymer microspheres, 10 g of solid paraffin with a melting point of 45 °C and 40 g of water / ethanol mixed solvent with a mass ratio of 20 / 80 into a 100 mL glass bottle at room temperature, After sealing the glass bottle, place it in a constant temperature water bath shaker at 50°C, and vibrate at a vibration frequency of 240osc / min for 30min 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 left to stand at room temperature for 2 hours, the upper liquid was removed after the system was separated, and the lower solid was dried at 40° C. to obtain paraffin microspheres. The optical microscope photograph of gained paraffin microsphere sees ima...

Embodiment 3

[0051] Polymer microspheres were prepared according to the method described in Example 1.

[0052] Preparation of paraffin wax dispersion and paraffin wax microspheres: Add 0.5 g of polymer microspheres, 12.5 g of solid paraffin with a melting point of 55 °C and 37.5 g of water / ethanol with a mass ratio of 30 / 70 into a 100 mL glass bottle at room temperature For the solvent, seal the glass bottle and place it in a constant temperature water bath shaker at 60°C, shake it at a vibration frequency of 200osc / min for 60min 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 left to stand at room temperature for 2 hours. After the system was separated, the upper layer liquid was removed, and the lower layer solid was dried at 50° C. to obtain paraffin microspheres. The particle size of the obtained paraffin microspheres was 287 μ...

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Abstract

The invention relates to a method for preparing paraffin dispersion liquid and paraffin microspheres using polymer microspheres as a stabilizer. Water and ethanol are used as dispersing medium agent. The preparation method comprises the steps of adding paraffin and polymer microspheres into the water-ethanol component solvent for one time, heating until the melting of the paraffin, then shaking with a reciprocating oscillator to acquire the the paraffin dispersion liquid with a surface overlaid with polymer microspheres. The preparation method requires little amount of stabilizer, and no other assistants. The prepared paraffin microspheres have a clean surface. The present invention can achieve a one-step process of the preparation of paraffin dispersion liquid of paraffin microspheres with uniform size. The test process is simple, costs short time, and has high production efficiency. At the same time in the preparation process, the high speed agitation and high speed homogenizing equipment are not necessary. Ordinary water bath shake is enough for the preparation of stable paraffin dispersion liquid. The production cost and energy consumption are all starkly reduced, thus being beneficial to achieve the industrial production and application of the paraffin dispersion liquid.

Description

technical field [0001] The invention relates to a method for preparing paraffin dispersion and paraffin microspheres, in particular to a method for preparing paraffin dispersion and paraffin microspheres by using polymer microspheres as a stabilizer, and belongs to the technical field of Pickering emulsion preparation. Background technique [0002] Paraffin wax has the characteristics of good hydrophobicity, plasticity, sealing, insulation and lubricity, and is widely used in leather, papermaking, textile and daily chemical industry. Emulsified paraffin wax is a relatively stable paraffin particle dispersion system formed by dispersing paraffin wax in a liquid medium (generally water) in the form of fine particles with the help of stabilizers (or emulsifiers) and external mechanical forces. It is used in construction, light industrial rubber, It has broad application prospects in fields such as oil drilling, papermaking and textiles. [0003] The preparation of fine, unifor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08J3/09C08L91/06
CPCC08J3/03C08J3/095C08J2391/06
Inventor 姜绪宝孔祥正肖作旭
Owner UNIV OF JINAN
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