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Sulfonation crosslinking cyclodextrin starch microcapsule flame retarding and smoke suppressing agent and preparation method thereof

A technology of cross-linked cyclodextrin and microcapsules, applied in the field of flame retardant, can solve the problem of insignificant carbon monoxide barrier effect, and achieve the effects of reducing heat release, preventing combustion, and inhibiting smoke release

Active Publication Date: 2017-03-29
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained flame retardant composite material is green and environmentally friendly, and can effectively reduce the heat release when the material is burned. However, the barrier effect of the flame retardant composite material on toxic smoke and carbon monoxide is not significant, and further improvement is still needed

Method used

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  • Sulfonation crosslinking cyclodextrin starch microcapsule flame retarding and smoke suppressing agent and preparation method thereof
  • Sulfonation crosslinking cyclodextrin starch microcapsule flame retarding and smoke suppressing agent and preparation method thereof
  • Sulfonation crosslinking cyclodextrin starch microcapsule flame retarding and smoke suppressing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A sulfonated cross-linked cyclodextrin starch microcapsule flame retardant and smoke suppressant of the present invention, said microcapsule flame retardant and smoke suppressant is composed of inner embedding material and outer coating capsule layer, and its preparation method specifically includes the following steps : (The following parts are all parts by mass)

[0054] (1) Mix 40 parts of β-cyclodextrin and 60 parts of starch, add appropriate amount of water, stir at a constant temperature of 50°C for 0.5h, then add 20 parts of epoxy silane crosslinking agent, and add NaOH solution with a mass concentration of 10% Adjust the pH to about 9-11. After reacting for 1 hour, add 0.1mol / L hydrochloric acid dropwise to adjust the pH to about 6.5. After cooling at room temperature, wash until neutral, then vacuum-dry at 60°C, crush and pass through a 80-120 mesh sieve , to obtain cross-linked cyclodextrin starch;

[0055] (2) For the cross-linked cyclodextrin starch obtaine...

Embodiment 2

[0068] A sulfonated cross-linked cyclodextrin starch microcapsule flame retardant and smoke suppressant of the present invention, said microcapsule flame retardant and smoke suppressant is composed of inner embedding material and outer coating capsule layer, and its preparation method specifically includes the following steps : (The following parts are all parts by mass)

[0069] (1) Mix 40 parts of α-cyclodextrin and 50 parts of starch, add appropriate amount of water, stir at a constant temperature of 50°C for 0.5h, then add 20 parts of epichlorohydrin crosslinking agent, and add NaOH with a mass concentration of 10% Adjust the pH of the solution to about 9-11. After reacting for 2 hours, add 0.1mol / L hydrochloric acid dropwise to adjust the pH to about 6.5. After cooling at room temperature, wash until neutral, and then vacuum-dry at 60°C. After crushing, pass through 80-120 mesh Sieve to obtain cross-linked cyclodextrin starch;

[0070] (2) For the cross-linked cyclodextr...

Embodiment 3

[0086] A sulfonated cross-linked cyclodextrin starch microcapsule flame retardant and smoke suppressant of the present invention, said microcapsule flame retardant and smoke suppressant is composed of inner embedding material and outer coating capsule layer, and its preparation method specifically includes the following steps : (The following parts are all parts by mass)

[0087] (1) Mix 40 parts of β-cyclodextrin and 55 parts of starch, add appropriate amount of water, stir at a constant temperature of 50°C for 0.5h, then add 30 parts of epoxy silane crosslinking agent, and add NaOH solution with a mass concentration of 10% Adjust the pH to about 9-11, add 0.1mol / L hydrochloric acid dropwise to adjust the pH to about 6.5 after reacting for 2 hours, wash to neutral after cooling at room temperature, then vacuum-dry at 60°C, crush and pass through 80-120 mesh sieve , to obtain cross-linked cyclodextrin starch;

[0088] (2) For the cross-linked cyclodextrin starch obtained afte...

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Abstract

The invention discloses a sulfonation crosslinking cyclodextrin starch microcapsule flame retarding and smoke suppressing agent. The microcapsule flame retarding and smoke suppressing agent is composed of an internal investing material and an outer covering capsule layer. The internal investing material is prepared from, by mass, 80-100 parts of phosphoric acid, 60-80 parts of cyclodextrin, 50-60 parts of starch, 200-300 of concentrated sulfuric acid, 30-50 parts of a cross-linking agent, 10-20 parts of urea, 2-5 parts of emulsification paraffin and 2-5 parts of a surface active agent. The outer covering capsule layer is prepared from, by mass, 1-2 parts of nanometer CaCO3 and 50-70 parts of melamine resin. The environment-friendly flame retarding agent is efficient and low in toxicity. The invention further provides a preparation method of the sulfonation crosslinking cyclodextrin starch microcapsule flame retarding and smoke suppressing agent. biomass material processing surplus materials are developed and recycled, and the interface compatibility of cyclodextrin and the covering capsule layer is improved.

Description

technical field [0001] The invention belongs to the field of flame retardant technology, and in particular relates to a sulfonated cross-linked cyclodextrin starch microcapsule flame retardant and smoke suppressant and a preparation method thereof. Background technique [0002] Fire is one of the most influential natural disasters in the world, which seriously threatens people's lives and property safety. According to data from the Fire Department of the Ministry of Public Security, in 2013, a total of 388,000 fires were reported across the country, with 2,113 deaths, 1,637 injuries, and direct property losses of 4.85 billion yuan. Compared with 2012, the number of fires increased by 1.52 times, the number of deaths increased by 106%, the number of injured increased by 1.85 times, and the direct property loss increased by 122%. Among them, 117,000 residential fires occurred, accounting for 30.1% of the total, resulting in 1,215 deaths, accounting for 57.5% of the total. Mor...

Claims

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Application Information

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IPC IPC(8): C08K13/06C08K9/12C08K9/10C08K3/04C08K3/26C08L97/02C08L61/24C08L63/00C08L23/08C08L91/06B01J13/14
CPCB01J13/14C08K3/04C08K3/26C08K9/10C08K9/12C08K13/06C08K2003/265C08K2201/011C08L27/06C08L97/02C08L2201/02C08L2201/08C08L2205/035C08L61/24C08L63/00C08L23/0853C08L91/06
Inventor 袁利萍胡云楚冯斯宇黄自知袁光明吴袁泊
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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