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Water soluble salt microcapsule wrapped by polybenzoxazine resin and preparation method thereof

A technology of water-soluble salt and benzoxazine, which is applied in the field of water-soluble salt microcapsules coated with benzoxazine resin and its preparation, can solve the problems of large particle size and complicated process, and achieve low cost and excellent preparation process. Simple, good heat and corrosion resistance effect

Active Publication Date: 2015-11-11
YUTIAN ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above-mentioned microcapsules have large particle sizes or complex processes, which limit their use. Therefore, it is necessary to provide a low-cost, efficient and practical microcapsules coated with water-soluble inorganic salts and a preparation method thereof

Method used

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  • Water soluble salt microcapsule wrapped by polybenzoxazine resin and preparation method thereof
  • Water soluble salt microcapsule wrapped by polybenzoxazine resin and preparation method thereof
  • Water soluble salt microcapsule wrapped by polybenzoxazine resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In 100ml cyclohexane, add 10g surfactant Span-80 (Span-80) to form oil phase solution A;

[0040] Add 3 g of water-soluble salt potassium acetate to 5 g of deionized water to form aqueous solution B;

[0041] In 5g deionized water, add 3g resorcinol and 5g acetaldehyde to form aqueous phase solution C,

[0042] Mix solutions B and C evenly and add them to solution A to form a stable W / O emulsion D at a stirring rate of 100-5000r / min;

[0043] Add 2 g of aniline solution dropwise to emulsion D, heat to 50°C, and react for 30 minutes;

[0044] The complete reaction solution is filtered to separate the microcapsules; washed with petroleum ether organic solvent, suction filtered and dried to form potassium acetate microcapsules coated with benzoxazine resin. figure 1 , 2 , 3 are respectively 3500 times, 25000 times, and 8000 times of SEM figures for the magnification of the microcapsules prepared in Example 1, from figure 1 It can be seen that the microcapsules have goo...

Embodiment 2

[0048] In 90ml cyclohexane, add 8g surfactant Span-80 (Span-80) to form oil phase solution A;

[0049] Add 2g of water-soluble salt sodium acetate to 5g of deionized water to form aqueous solution B;

[0050] In 6g deionized water, add 4g phenol and 6g butyraldehyde to form aqueous solution C,

[0051] Mix solutions B and C evenly and add them to solution A to form a stable W / O emulsion D at a stirring speed of 1500r / min;

[0052] Add 1 g of ethylenediamine solution dropwise to emulsion D, and heat to 55°C for 45 minutes;

[0053] The complete reaction solution is filtered to separate the microcapsules; washed with petroleum ether organic solvent, suction filtered and dried to form sodium acetate microcapsules coated with benzoxazine resin.

Embodiment 3

[0055] Add 8g of surfactant Span-80 (Span-80) to 90ml petroleum ether to form oil phase solution A;

[0056] Add 2g of water-soluble sodium sulfate to 5g of deionized water to form aqueous solution B;

[0057] In 6g deionized water, add 4g resorcinol and 6g formaldehyde to form aqueous phase solution C,

[0058] Mix solutions B and C evenly and add them to solution A to form a stable W / O emulsion D at a stirring speed of 1000r / min;

[0059] Add 2g of aniline solution dropwise to emulsion D, heat to 60°C, and react for 60min;

[0060] The complete reaction solution is filtered to separate the microcapsules; washed with n-hexane organic solvent, suction filtered and dried to form sodium sulfate microcapsules coated with benzoxazine resin.

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Abstract

The invention discloses a water soluble salt microcapsule wrapped by polybenzoxazine resin. The wall material of the microcapsule is the polybenzoxazine resin, and the core material of the microcapsule is water soluble salt; the particle size of the microcapsule ranges from 1 to 500 micrometers; the microcapsule is small in particle size and good in dispersity. The invention further discloses a preparation method of the microcapsule, the method is an interfacial polymerization method, before a reaction, the wall material ingredients to be used are located in the dispersion phase where the wrapped water soluble matters are located and the oil phase serving as the continuous phase, in the reaction, the wall material ingredients of the microcapsule are deposited on the oil-water phase interface preferentially, so that water soluble inorganic salt is wrapped inside the microcapsule completely, and the cladding rate of the core materials is high. The method is simple in preparation process, the wall material solidification of the microcapsule is formed in one step, the preparation period is short, the whole reaction process is conducted at a low temperature, and the preparation cost is low.

Description

technical field [0001] The present invention relates to the technical field of microcapsules. More specifically, it relates to a benzoxazine resin-coated water-soluble salt microcapsule and a preparation method thereof. Background technique [0002] Microcapsules refer to micro-containers or packages with a core-shell structure, with diameters ranging from nanometers to millimeters. The outer coating of the microcapsules is called the wall material (or capsule wall, shell), which can be natural or synthetic. The polymer material; the material wrapped in the microcapsule is called the core material (or capsule core), which can be solid, liquid or gas. [0003] Microcapsule technology is a technology that uses natural or synthetic polymer materials to coat the core material by chemical, physical or chemical physical methods to form a microcapsule with a sealed or semi-permeable capsule. Microencapsulating a substance can improve its physical properties and increase its stabi...

Claims

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Application Information

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IPC IPC(8): B01J13/16
Inventor 杜兔平黄小林王菲
Owner YUTIAN ENERGY CO LTD
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