Microporous foamed-plastic foaming agent and preparation method thereof

A foamed plastic and foaming agent technology, which is applied in the field of preparation of azodicarbonamide and attapulgite materials, can solve the problems of small loading of foaming agent and the like, and achieve the effect of increasing the loading.

Active Publication Date: 2013-01-30
海安常州大学高新技术研发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the loading of foaming agent on the carrier is small, so how to increase the loading of azodicarbonamide on the inorganic material with slow-release function has become the focus of research

Method used

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  • Microporous foamed-plastic foaming agent and preparation method thereof
  • Microporous foamed-plastic foaming agent and preparation method thereof

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Embodiment 1

[0019] The method for modifying attapulgite with sodium tungstate is to weigh 0.01g of sodium tungstate, dissolve it in 100g of water, then add 10g of attapulgite, use ultrasonic wave for 30min, and then heat in a constant temperature heating magnetic stirrer at 80°C Stir for 0.5h, then filter with suction, wash 3 times, and dry at 80°C for 12h to obtain sodium tungstate-modified attapulgite.

[0020] The adsorption method of sodium tungstate modified attapulgite to azodicarbonamide is as follows: prepare 100ml of a mixed solvent with a volume ratio of dimethyl sulfoxide and water of 1:1, add 200mg of azodicarbonamide, after fully dissolving, add 0.5g of sodium tungstate modified attapulgite, kept at 50°C, stirred for 0.5h, centrifuged, discarded the supernatant, dried at 30°C for 6h, and azodicarbonamide / tungstic acid was obtained Sodium / attapulgite composite foaming agent, analyzed by infrared spectroscopy ( figure 1 ), figure 1 Among them, a is the infrared spectrum of at...

Embodiment 2

[0022] The method of modifying attapulgite with sodium tungstate is to weigh 0.05g of sodium tungstate, dissolve it in 100g of water, then add 10g of attapulgite, use ultrasonic wave for 10min, and then heat in a constant temperature heating magnetic stirrer at 60°C Stir for 2 hours, then suction filter, wash 3 times, and dry at 110°C for 6 hours to obtain sodium tungstate-modified attapulgite.

[0023] The adsorption method of sodium tungstate modified attapulgite to azodicarbonamide is as follows: prepare 100ml of a mixed solvent with a volume ratio of dimethyl sulfoxide and water of 5:5, add 200mg of azodicarbonamide, after fully dissolving, add 0.5g sodium tungstate modified attapulgite, kept at 30°C, stirred for 5h, centrifuged, discarded the supernatant liquid, dried at 60°C for 3h, and azodicarbonamide / sodium tungstate was obtained / Nano attapulgite composite foaming agent. Quantitative analysis of azodicarbonamide in the clarified liquid by UV-Vis spectroscopy. As s...

Embodiment 3

[0025] The method of modifying attapulgite with sodium tungstate is to weigh 0.3g of sodium tungstate, dissolve it in 100g of water, then add 10g of attapulgite, use ultrasonic wave for 30min, and then heat in a constant temperature heating magnetic stirrer at 80°C Stir for 2 hours, then suction filter, wash 3 times, and dry at 105°C for 12 hours to obtain sodium tungstate-modified attapulgite.

[0026] The adsorption method of sodium tungstate modified attapulgite to azodicarbonamide is as follows: prepare 100ml of a mixed solvent with a volume ratio of dimethyl sulfoxide and water of 7:3, add 200mg of azodicarbonamide, after fully dissolving, add 0.5g sodium tungstate modified attapulgite, kept at 50°C, stirred for 2h, centrifuged, discarded the supernatant liquid, dried at 50°C for 5h, and azodicarbonamide / sodium tungstate was obtained / Nano-attapulgite composite foaming agent, quantitative analysis of azodicarbonamide in clarified liquid by ultraviolet-visible spectroscopy...

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Abstract

The invention aims at improving the capacity of azodicarbonamide on attapulgite, and provides a microporous foamed-plastic foaming agent and a preparation method thereof. The microporous foamed-plastic foaming agent comprises the following components of azodicarbonamide, sodium tungstate and attapulgite. The method for preparing the microporous foamed-plastic foaming agent comprises the following step of adsorbing azodicarbonamide on attapulgite which is modified by sodium tungstate. The microporous foamed-plastic foaming agent and the preparation method have the advantageous effects that an azodicarbonamide / sodium tungstate / nano-attapulgite compound is provided, and the capacity of azodicarbonamide on attapulgite is largely increased through the introduction of sodium tungstate, so that azodicarbonamide is possibly used as a foaming agent.

Description

technical field [0001] The present invention relates to a method for preparing a blowing agent for foamed plastics, especially azodicarbonamide, which is effectively loaded on attapulgite materials. Background technique [0002] Since the 1980s, microcellular foam has been widely used in various fields such as aerospace, automobiles, plastic packaging, furniture, and sporting goods due to its unique properties. At present, the vast majority of pyrolytic foam nanocomposite plastics are realized through the following two processes, one is to synthesize nanocomposites, and the other is to add nanocomposites to the plastic matrix for foaming. The cell structure is formed by foaming the foaming agent through processes such as extrusion molding. Two types of blowing agents can be used to foam polymers. One is a physical blowing agent and the other is a chemical blowing agent. In recent years, the supercritical fluid method has attracted extensive attention of researchers due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/10C08K9/12C08K9/02C08K3/34
Inventor 陈智栋汤传贵王雪王文昌韶晖肖春阳
Owner 海安常州大学高新技术研发中心
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