自具微孔聚合物PIM-1基热致刚性膜材料的制备及气体分离性能

doi:10.11896/j.issn.1005-023X.2018.16.032

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Abstract Firstly,5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethylspirobisindane was synthesized from catechol and acetone as the raw materials. Then, the intrinsically microporous polymer PIM-1 was prepared from a dioxane-forming reaction between the home-made 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethylspirobisindane and 2,3,5,6-tetrafluoroterephthalonitrile. The PIM-1 polymer membranes were thermally treated at 300 ℃,350 ℃ and 400 ℃ for 1 h under the N₂ atmosphere, respectively. The structures and properties of the tetrahydroxyl compound, PIM-1 polymer and the PIM-1 based thermally induced rigid membranes were characterized by nuclear magnetic resource (NMR), gel permeation chromatography (GPC), differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), Fourier transform infrared (FTIR), X-ray diffraction (XRD) and scanning electron microscope (SEM), and the gas separation properties of these membranes were also measured with five kinds of pure gases, including H₂, O₂, N₂, CO₂ and CH₄. These experimental results showed that the obtained PIM-1 exhibited good thermal properties with the glass transition temperature (T_g) of 340 ℃ and the thermal decomposition temperature (T_d) of 503 ℃. The gas permeabilities of the resultant PIM-1 based thermally induced rigid membranes were further improved by controlling the processing temperature. After the thermal treatment at 300 ℃, the permeabilities of H₂, O₂, N₂, CO₂ and CH₄ of the thermally induced rigid membranes were 2 865 Barrer,1 071 Barrer,298 Barrer,7 070 Barrer and 495 Barrer, separately. Furthermore, with the temperature increasing, the permeabilities of these gas separation membranes were decreased, but the selectivity was improved. For the PIM-1-400 membrane, the selectivity of CO₂/CH₄ was 18.51.

Key words： intrinsically microporous polymer gas separation thermally induced rigid membrane permeability

Published: 18 September 2018

CLC number:

TQ028

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	Articles by authors
	LU Yunhua
	HAO Jican
	LI Lin
	SONG Jing
	XIAO Guoyong
	HU Zhizhi
	WANG Tonghua

Cite this article:

LU Yunhua,HAO Jican,LI Lin, et al. Preparation and Gas Separation Properties of Polymers of Intrinsic Microporosity PIM-1 Based Thermally Induced Rigid Membranes[J]. Materials Reports, 2018, 32(16): 2876-2881.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.16.032 OR http://www.mater-rep.com/EN/Y2018/V32/I16/2876

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