Choline phytate flame retardant, preparation method and application thereof in the preparation of flame retardant thermoplastic starch

A technology of thermoplastic starch and flame retardant, which is applied in the preparation of type expansion flame retardant and the field of preparation of flame retardant thermoplastic starch

Active Publication Date: 2021-05-14
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, toxic substances such as melamine are still used as nitrogen sources in the above flame retardants.

Method used

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  • Choline phytate flame retardant, preparation method and application thereof in the preparation of flame retardant thermoplastic starch
  • Choline phytate flame retardant, preparation method and application thereof in the preparation of flame retardant thermoplastic starch
  • Choline phytate flame retardant, preparation method and application thereof in the preparation of flame retardant thermoplastic starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation method of green environmental protection type phytic acid choline flame retardant, the steps are:

[0035] (1) 0.7mol sodium hydroxide and 0.7mol choline chloride were dissolved in 300g and 200g ethanol respectively, after the two solutions were mixed and reacted at normal temperature for 1h, suction filtration obtained the filtrate of choline hydroxide;

[0036] (2) Weigh 0.117mol phytic acid and dissolve it in 100g ethanol, mix the filtrate of the choline hydroxide obtained in step (1), react at normal temperature for 1h, remove the supernatant, and then wash with ethanol several times to pH =7 and no change, and then dried for 10 hours under the conditions of temperature 80° C. and pressure −0.08 MPa to obtain a phytic acid choline flame retardant, denoted as CPA1.

Embodiment 2

[0038] A preparation method of a green environment-friendly flame retardant, the steps are:

[0039] (1) 0.7mol sodium hydroxide and 0.7mol choline chloride are dissolved in 300g and 200g methanol respectively, after reacting at normal temperature for 8h, suction filtration obtains the filtrate of choline hydroxide;

[0040] (2) Take 0.1053mol phytic acid and dissolve it in 100g methanol, react at normal temperature for 12h, get the filtrate of the choline hydroxide obtained in step (1) and mix, remove the supernatant, and then wash with ethanol several times to pH =7 and no change, and then dried for 10 hours under the conditions of temperature 80° C. and pressure −0.06 MPa to obtain phytic acid choline flame retardant, denoted as CPA2.

Embodiment 3

[0042] A preparation method of a green environment-friendly flame retardant, the steps are:

[0043] (1) 0.7mol sodium hydroxide and 0.7mol choline chloride are dissolved in 300g and 200g methanol respectively, after reacting at normal temperature for 3h, suction filtration obtains the filtrate of choline hydroxide;

[0044] (2) Weigh 0.0585mol phytic acid and dissolve it in 100g methanol, react at normal temperature for 10h, get the filtrate of choline hydroxide obtained in step (1) and mix, remove the supernatant, and then wash with ethanol several times to pH =7 and no change, and then dried for 10 hours under the conditions of temperature 80°C and pressure -0.1MPa to obtain phytic acid choline flame retardant, which is denoted as CPA3.

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Abstract

The invention relates to a phytic acid choline flame retardant, a preparation method and its application in preparing flame-retardant thermoplastic starch, belonging to the field of flame retardants and flame-retardant thermoplastic starch. The preparation method of the green and environment-friendly phytic acid choline flame retardant is: take choline chloride, sodium hydroxide and a solvent, react at -10°C to 60°C for 1 to 8 hours, and then suction filter to obtain the filtrate of choline hydroxide; Add phytic acid solution into the reaction vessel equipped with thermometer and stirrer, the ratio of phytic acid and choline is 0.8~2.0 based on the molar ratio of nitrogen atom in quaternary ammonium salt and free hydroxyl group in phytic acid, after reacting for 1-12h , remove the solvent, and dry to obtain a phytic acid choline flame retardant; use the flame retardant to modify the starch to obtain a flame-retardant thermoplastic starch with a flame-retardant grade of V‑0. The preparation method of the invention is simple, green and environment-friendly, has good compatibility with starch, and the thermoplastic starch maintains good transparency.

Description

technical field [0001] The invention relates to the fields of flame retardants and flame retardant thermoplastic starches, in particular to a preparation method of a type of intumescent flame retardant and its use for preparing flame retardant thermoplastic starches. Background technique [0002] Starch is a natural polymer that is second only to cellulose in terms of yield on the earth, and is mainly found in fruits, seeds, rhizomes and tubers of plants. In addition to being called the main food source of human beings, starch is also widely used in non-edible fields. Especially since the 21st century, with the surge of population and the shortage of oil resources, human beings have to face the dual pressure of resources and environment. Due to the biodegradability and environmental friendliness of biopolymer materials, such materials have aroused widespread interest in academia and industry. However, starch is as flammable as most petroleum-based plastics, which hinders i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/521C08K5/19C08L3/02C07F9/117
CPCC07F9/117C08K5/19C08K5/521C08L2201/02C08L2201/10C08L3/02
Inventor 东为富王冬李婷汪洋陈明清马丕明
Owner JIANGNAN UNIV
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