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Composite zeolitic imidazolate framework material as well as preparation method and application thereof

A technology of composite zeolite imidazolate and zeolite imidazolate, which is applied in the field of composite zeolite imidazolate framework materials and its preparation, can solve the problems of irregular crystal appearance and difficult control of crystal size, and avoid heterogeneous growth. High crystallinity, effect of reducing temperature drop

Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the appearance of crystals prepared by this method is irregular and it is difficult to control the crystal size; in addition, the material also has obvious thermal effects during gas adsorption-desorption

Method used

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  • Composite zeolitic imidazolate framework material as well as preparation method and application thereof
  • Composite zeolitic imidazolate framework material as well as preparation method and application thereof
  • Composite zeolitic imidazolate framework material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Take 10 parts by weight of 25 # Paraffin wax and 2 parts by weight of sodium lauryl sulfate are added to 70 parts by weight of ethanol aqueous solution, wherein the mass ratio of absolute ethanol to water is 4:1. Heat in a water bath at 50°C, and mechanically stir for 30 minutes after the phase change material melts to obtain a uniformly dispersed emulsion; add 8 parts by weight of tetraethyl orthosilicate and 0.25 parts by weight of 1wt% hydrochloric acid dropwise in the above emulsion, and continue Stir at constant temperature for 3 hours, age at room temperature, filter, wash, and dry to obtain PCM@SiO 2 Microcapsules. Depend on figure 1 It can be seen that PCM@SiO 2 The particle size of the microcapsule is 80nm-120nm, the particle size distribution is uniform, and the shape of the microcapsule is relatively regular, the surface is smooth, and it contains a lot of surface silicon hydroxyl groups.

[0045] (2) Add 0.5 parts by weight of PCM@SiO 2 Add the micr...

Embodiment 2

[0048] The preparation method is basically the same as in Example 1, the difference is that PCM@SiO 2 The weight of the microcapsules was reduced to 0.2 parts by weight, and the composite zeolite imidazolate skeleton material B was obtained.

Embodiment 3

[0050] (1) Take 10 parts by weight of 35 # Paraffin and 2 parts by weight of sodium tetradecyl sulfate are added to 50 parts by weight of ethanol aqueous solution, wherein the mass ratio of absolute ethanol to water is 4:1. Heat in a water bath at 50°C, and mechanically stir for 30 minutes after the phase change material is melted to obtain a uniformly dispersed emulsion; add 16 parts by weight of tetraethyl orthosilicate and 5 parts by weight of 4wt% acetic acid dropwise in the above emulsion, and continue to keep the temperature Stir for 4 hours, age at room temperature, filter, wash, and dry to obtain PCM@SiO 2 Microcapsules. PCM@SiO 2 The particle size of the microcapsules is 100nm-150nm, and the distribution is relatively uniform.

[0051] (2) Add 0.3 parts by weight of PCM@SiO 2 Add the microcapsules to 100 parts by weight of N,N-dimethylformamide, and stir to obtain PCM@SiO 2 suspension of microcapsules.

[0052] (3) Add 1.01 parts by weight of 2-methylimidazole a...

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Abstract

The invention discloses a composite zeolitic imidazolate framework material as well as a preparation method and application thereof. The composite zeolitic imidazolate framework material provided by the invention is prepared from a zeolitic imidazolate framework material and a microcapsule, wherein the surface of the microcapsule is clad with the zeolitic imidazolate framework material; a shell layer of the microcapsule is SiO2; an inner core of the microcapsule is an organic phase-change material. The composite zeolitic imidazolate framework material provided by the invention not only has quite high crystallinity, specific surface area and total pore volume, but also has a quite low heat effect.

Description

technical field [0001] The invention relates to a zeolite imidazolate framework material and a preparation method thereof, more specifically, a composite zeolite imidazolate framework material used in gas adsorption, gas adsorption storage, and gas adsorption separation and a preparation method thereof. Background technique [0002] Zeolitic imidazolate frameworks (ZIFs) are a class of rigid framework materials formed by self-assembly of metal ions and organic ligands, and their topology is similar to that of silica-alumina zeolite molecular sieves. There are huge potential application prospects in the fields of catalysis, storage, medicine, optics and electromagnetic materials, especially the prospects in the adsorption of energy gases such as methane and hydrogen are more interesting. [0003] The adsorption of gas usually releases a large amount of heat, and the thermal conductivity of adsorbents such as activated carbon, zeolite, and composite zeolite imidazolate framewo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2253/20B01J20/22B01J2220/4812Y02C20/40
Inventor 马蕊英王海洋赵亮张英郭土邢兵
Owner CHINA PETROLEUM & CHEM CORP