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Urea-formaldehyde resin microcapsule material with capsule core half-filled structure and preparation method thereof

A urea-formaldehyde resin and microcapsule technology, which is applied in the field of urea-formaldehyde resin microcapsule materials with a capsule core half-filled structure and its preparation, to achieve high strength and improve damping performance

Inactive Publication Date: 2012-05-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For how to prepare a kind of microcapsule with capsule core semi-filled structure, there is no relevant report yet

Method used

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  • Urea-formaldehyde resin microcapsule material with capsule core half-filled structure and preparation method thereof
  • Urea-formaldehyde resin microcapsule material with capsule core half-filled structure and preparation method thereof
  • Urea-formaldehyde resin microcapsule material with capsule core half-filled structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) 10 g of tetrachlorethylene and 5.5 g of olive oil were mixed and stirred at 50° C., and subjected to ultrasonication for 30 min to obtain a homogeneously mixed organic solution.

[0032] (2) At room temperature, in a 250ml four-necked bottle, add 15ml of polyethylene-maleic anhydride aqueous solution with a concentration of 2.5wt%, and under stirring, add 2.5g of urea, 0.25g of ammonium chloride and 0.25g of resorcinol therein phenol. The pH of the solution was adjusted to 3.5 with hydrochloric acid or aqueous sodium hydroxide. Adjust the stirring speed to 600rpm, slowly add the mixed core material prepared in (1) dropwise therein, and emulsify for 30min. After adding 6.4g of formaldehyde solution with a mass fraction of 37%, the reaction was started, the temperature was slowly raised to 50-60°C, and the reaction was stopped after 3 hours, cooled, filtered with suction, washed with deionized water, and dried at room temperature to obtain free-flowing microcapsule p...

Embodiment 2

[0034] In embodiment 1, the 5.5g olive oil that adds adds 6g liquid paraffin instead, and all the other are with embodiment 1.

Embodiment 3

[0036] In Example 1, the initial pH value of the reaction solution was adjusted to 4.5, and the rest were the same as in Example 1.

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Abstract

The invention discloses a urea-formaldehyde resin microcapsule with a capsule core half-filled structure and a preparation method thereof. The urea-formaldehyde resin microcapsule is prepared by the following steps of: performing ultrasonic treatment on two liquids of different volatilities to serve as core materials; synthesizing powdery microcapsule with excellent dispersibility through polymerization reaction of urea and formaldehyde; and then releasing the core material serving as a volatile component in the prepared microcapsule under the condition of 60 DEG C and maintaining the non-volatile component in the microcapsule to obtain the half-filled microcapsule with a stable structure. The microcapsule prepared by the method can have a half-filled cavity with different cavity ratios by controlling the proportion of the mixed core material. The preparation method has the advantages of readily available raw materials and simple process; and the microcapsule has high structural strength and high stability.

Description

technical field [0001] The invention relates to a urea-formaldehyde resin microcapsule material and a preparation method thereof, in particular to a urea-formaldehyde resin microcapsule material with a capsule core half-filled structure and a preparation method thereof. technical background [0002] Microcapsule is a kind of natural or synthetic polymer film-forming material that completely covers dispersed solid matter, liquid droplets or gas, making it a tiny particle with a core-shell structure, so that it has special functions. Since NCR Corporation of the United States used microcapsule technology to make the first generation of carbonless copy paper, microcapsule technology has been widely used in medicine, flavors, antiseptics, textiles, pigments, liquid crystal displays, pesticides and military fields. With the continuous advancement of microcapsule technology, the application fields of microcapsules are also expanding. [0003] In recent years, with the application...

Claims

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Application Information

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IPC IPC(8): B01J13/02
Inventor 周晓东王凯辉范传杰林群芳沈健伟方立
Owner EAST CHINA UNIV OF SCI & TECH