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Urea-formaldehyde resin type pentacyclic undecane microcapsule and preparation method thereof

A technology of urea-formaldehyde resin and microcapsules, which is applied in the field of microcapsules of urea-formaldehyde resin-type pentacycloundecane and its preparation, can solve problems such as bad smell and easy sublimation of pentacycloundecane, and achieve extended use and storage life, Overcoming the effects of easy sublimation and easy operation

Inactive Publication Date: 2016-02-10
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the defects of easy sublimation and bad smell of pentacycloundecane, and integrate the advantages of microcapsule technology to provide a urea-formaldehyde resin type pentacycloundecane microcapsule, the urea-formaldehyde resin type pentacycloundecane microcapsule Alkanes microcapsules have good stability and chemical compatibility

Method used

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  • Urea-formaldehyde resin type pentacyclic undecane microcapsule and preparation method thereof

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Effect test

Embodiment 1

[0029] ①Weigh 3g of urea and 6.5g of formaldehyde (37%) and dissolve it in 20g of deionized water. The stirring speed is 400 rpm and stirring for 5 minutes to obtain a urea-formaldehyde resin prepolymer. ②Then weigh 4g of urea-formaldehyde resin prepolymer and add it to the reactor. The stirring rate is 800 rpm. First, weigh 0.3g of sodium dodecyl sulfate (SDS) into the reactor and stir for 10 minutes to obtain urea-formaldehyde resin. wall material. ③ 9g of pentacycloundecane and 0.3g of SDS were added to 30g of deionized water, the stirring speed was 500 rpm, and the mixture was stirred for 10 minutes to obtain an emulsion. ④ Under the condition that the stirring rate is 800 rpm, drop the emulsion into the urea-formaldehyde resin wall material, the reaction temperature rises to 60 ℃, after 50 minutes of reaction, the temperature is lowered to 25 ℃, and the pH value of the solution is adjusted with concentrated sulfuric acid to 1 to obtain urea-formaldehyde resin-type microc...

Embodiment 2

[0031] ① Dissolve 3.3g of urea and 7.0g of formaldehyde (37%) in 20g of deionized water, stir at a speed of 500 rpm, and stir for 5 minutes to obtain a urea-formaldehyde resin prepolymer. ②Then weigh 5g of urea-formaldehyde resin prepolymer and add it to the reactor. The stirring speed is 900 rpm. First, weigh 0.5g of sodium dodecyl sulfate (SDS) and add it to the reactor and stir for 10 minutes to obtain urea-formaldehyde resin. wall material. ③ Add 10 g of pentacycloundecane and 0.5 g of SDS to 35 g of deionized water, the stirring speed is 550 rev / min, and the mixture is stirred for 15 minutes to obtain an emulsion. ④ Under the condition that the stirring rate is 900 rpm, drop the emulsion into the urea-formaldehyde resin wall material, the reaction temperature rises to 65°C, and after 55 minutes of reaction, the temperature is lowered to 25°C, and the pH value of the solution is adjusted with concentrated sulfuric acid. to 1.5 to obtain urea-formaldehyde resin-type microc...

Embodiment 3

[0033] ① Dissolve 3.6g of urea and 7.5g of formaldehyde (37%) in 30g of deionized water, stir at a speed of 600 rpm, and stir for 10 minutes to obtain a urea-formaldehyde resin prepolymer. ②Then 6g of urea-formaldehyde resin prepolymer was weighed and added to the reactor. The stirring rate was 1000 rpm. First, 0.44g of sodium dodecyl sulfate (SDS) was weighed into the reactor and stirred for 15 minutes to obtain urea-formaldehyde resin. wall material. ③ Add 12 g of pentacycloundecane and 0.89 g of SDS to 40 g of deionized water, the stirring speed is 600 rpm, and the mixture is stirred for 20 minutes to obtain an emulsion. ④ Under the condition that the stirring rate is 900 rpm, drop the emulsion into the urea-formaldehyde resin wall material, the reaction temperature rises to 70 ℃, after 65 minutes of reaction, the temperature is lowered to 25 ℃, and the pH value of the solution is adjusted with concentrated sulfuric acid To 2, urea-formaldehyde resin-type microcapsules are...

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Abstract

The invention provides a urea-formaldehyde resin type pentacyclic undecane microcapsule and a preparation method thereof. The wall of the microcapsule is composed of urea-formaldehyde resin, the core material is composed of pentacyclic undecane, and the microcapsule is micron level granules. The preparation method comprises the following steps: adding urea and a formaldehyde solution into water, evenly stirring, adding a dispersant to prepare a urea-formaldehyde prepolymer; adding water into a reactor, then adding five-ring undecane into the reactor, adding a dispersant, evenly stirring, slowly pouring the urea-formaldehyde prepolymer into the five-ring undecane solution under high speed stirring, fully stirring and mixing, carrying out reactions and solidification, adjusting the pH value to the acidic range, filtering the reaction liquid, washing, and drying so as to obtain the urea-formaldehyde resin type five-ring undecane microcapsule. The provided preparation method has simple production conditions, and is easy to control. The problem that sublimation of five-ring undecane is easy is solved, and at the same time, the unpleasant odor of five-ring undecane is also eliminated. The prepared five-ring undecane microcapsule can be applied to fuel in propellant.

Description

technical field [0001] The invention relates to a product that can be used as fuel or the highest energy additive in rocket engines, in particular to a microcapsule of urea-formaldehyde resin type pentacycloundecane and a preparation method thereof. Background technique [0002] The development of new missile weapons puts forward requirements for the propulsion system such as high speed, long range, small size, light weight and simple structure. Therefore, the solid ramjet with excellent performance has become a research hotspot, and the application of solid fuel-rich propellant is the development of solid One of the key technologies of ramjet. Hydrocarbon fuel-rich propellant is a fuel-rich propellant with solid hydrocarbon fuel as a high-energy and high-density additive. The replacement of part of the hydroxyl-terminated polybutadiene (HTPB) binder with solid hydrocarbon fuel can greatly improve the fuel-rich propellant. Energy levels, the use of solid hydrocarbon fuels c...

Claims

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Application Information

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IPC IPC(8): C10L5/00C10L10/00C06B27/00B01J13/14B01J13/02C08G12/12
Inventor 鲁统洁韦伟王亚杜利邱贤平金凤陈克海蔡克龙
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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