Nano composite foaming agent, foaming product, and preparation method and application thereof

A technology of nano-composite and foamed products, applied in the field of composite foaming agent and foaming agent, can solve the problem that the foaming efficiency and quality need to be further improved, the nucleation point of the composite foaming agent needs to be increased, and the size of the cells is difficult to control, etc. problem, to achieve the effect of small particle size, improved agglomeration and good foaming quality

Active Publication Date: 2016-09-21
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The technical problem solved by the present invention is: although the existing composite blowing agent can solve the problem that the cell size is difficult to control to a certain extent, the composite effect of the present blowing agent still needs to be improved, and the nucleation point on the composite blowing agent It still needs to be increased, and the foaming efficiency and quality need to be further improved

Method used

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  • Nano composite foaming agent, foaming product, and preparation method and application thereof
  • Nano composite foaming agent, foaming product, and preparation method and application thereof
  • Nano composite foaming agent, foaming product, and preparation method and application thereof

Examples

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Embodiment 1

[0089] Preparation of embodiment one nanocomposite blowing agent

Embodiment 11

[0090] Example 1.1 Pore expansion process of mesoporous silica

[0091] At 30°C, dissolve 6g of hexadecylamine in 600mL of isopropanol and 540mL of water, add 8.4mL of 28% ammonia solution, adjust the pH to 11.2, add 34.8mL of tetraethyl orthosilicate (TEOS) dropwise, at 30°C Let stand for one day, wash with absolute ethanol, and prepare by calcining with programmed temperature method to obtain mesoporous silica MS; Raise the temperature to 450°C and keep the temperature constant for 50 minutes; (3) raise the temperature to 600°C and keep the temperature constant for 4 hours.

[0092] Prepare NaCl solution with molar concentration of 5mol / L, LiCl solution with 5mol / L and KNO with 5mol / L respectively 3 solution, and NaCl, LiCl, KNO with a mass ratio of 4:1:1 3 The double salt solution, and the mass fraction of the double salt solution is 23%. Add 2g of the above-mentioned mesoporous silica to 100ml of the above-mentioned four kinds of salt solutions respectively, stir evenly...

Embodiment 13

[0096] Preparation of embodiment 1.3 nanocomposite blowing agent

[0097] Weigh 2.69g of chemical foaming agent 4,4'-oxobisbenzenesulfonamide (OBSH), dissolve it in 15Ml N,N'-dimethylformamide (DMF), and magnetically stir until uniform. Weigh 0.5 g of KH550-EMS4 prepared in Example 1.2 and add it to the above solution, stir evenly, ultrasonicate for 10 min, soak at room temperature for 24 h, and filter with a microporous filter. Wash with 10mL mixed washing solution (2g 4,4'-oxobisbenzenesulfonyl hydrazide, 10mL N,N'dimethylformamide and 10mL methanol), then wash with 10mL methanol, and dry in an oven at 60°C for 24h to obtain Nanocomposite blowing agent OBSH-KH550-EMS4, denoted as F1. In this example, F1 and OBSH-KH550-EMS4 refer to the same nanocomposite foaming agent.

[0098] Similarly, change the washing method in the above method to no washing or 10mL methanol washing instead of 10mL mixed washing solution (2g 4,4'-oxobisbenzenesulfonyl hydrazide, 10mL N,N'dimethylform...

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Abstract

The invention relates to the field of foaming agents, in particular to a nano composite foaming agent, a foaming product, and a preparation method and application thereof. The nano composite foaming agent is characterized in that the nano composite foaming agent is formed by compounding modified mesoporous silica and 4,4'-oxobibenzene sulfonamide, the mass ratio of the modified mesoporous silica to the 4,4'-oxobibenzene sulfonamide is 1: (3-7), and the modified mesoporous silica is obtained by successively carrying out pore expanding and grafted modification on the mesoporous silica. The nano composite foaming agent not only is small in particle size, but also is high in loading amount on a chemical foaming agent, so that micropore foamed plastic with good foaming quality can be obtained, and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of foaming agents, mainly to the field of composite foaming agents, and in particular to nanocomposite foaming agents, foaming products and their preparation methods and applications. Background technique [0002] Nano-mesoporous composites are composites formed by filling nanoparticles or clusters into mesoscopic voids. Due to confinement effects and interfacial coupling, this heterogeneous and heterogeneous mesoporous composite system has both different Due to the special properties of nanoparticles and different from ordinary mesoporous materials themselves. Mesoporous silica material has a large specific surface area and pore volume, and the pore size and shape are adjustable, so it has gradually become the most commonly used carrier material in nano-mesoporous composite materials. [0003] Microcellular foam refers to foam with uniform cell distribution and cell diameter less than 100 μm. Typical microcellular p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/06C08K7/26C08J9/10
CPCC08J9/10C08J2203/04C08J2363/00C08K7/26C08K9/06C08K2201/011C08L2203/14C08L63/00
Inventor 郭灿雄王足远
Owner BEIJING UNIV OF CHEM TECH
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