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Polysiloxane-polyphenyl ether crosslinked block copolymer and preparation method and use thereof

A technology of block copolymer and polysiloxane, applied in chemical instruments and methods, pervaporation, membrane technology, etc., can solve the problem of low activity of end-group functional groups, achieve enhanced mechanical properties, improve structure, and solve synthesis conditions harsh effect

Inactive Publication Date: 2011-08-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to select active cross-linking agents to react with the end groups of raw materials respectively, solve the shortcoming of low activity of the end group functional groups of the two reactants, improve the reaction conversion rate, and provide a polysiloxane-polyphenylene polysiloxane with controllable structure. Ether block copolymer and its preparation method, and its application in the field of pervaporation membrane

Method used

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  • Polysiloxane-polyphenyl ether crosslinked block copolymer and preparation method and use thereof
  • Polysiloxane-polyphenyl ether crosslinked block copolymer and preparation method and use thereof
  • Polysiloxane-polyphenyl ether crosslinked block copolymer and preparation method and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Weigh 0.22g toluene diisocyanate (TDI) and put it into a conical flask, dissolve it with chlorobenzene, put it into a constant temperature water tank and heat and stir it; weigh 10g of hydroxyl double-terminated PPO, dissolve it in chlorobenzene, and make 10 % solution; Weigh 7.125 g of aminopropyl double-capped PDMS, dissolve in chlorobenzene, and make a 10% solution. Pour the PPO solution into the separatory funnel, raise the temperature to 80°C, add the PPO solution dropwise to the conical flask for 1 hour; after 1 hour of stable reaction, add 3 ml of dibutyltin dilaurate dropwise to the conical flask ; After a stable reaction for 3 hours, use a separatory funnel to drop the PDMS solution into the conical flask for 1.5 hours; after a constant reaction for 3.5 hours, stop heating. Described crosslinking agent, polyphenylene ether, polysiloxane structure are as follows:

[0044]

[0045] The formed cross-linked copolymer structural formula is:

[0046]

[0047]...

Embodiment 2

[0052] Weigh 0.202g N, N'-carbonyldiimidazole (CDI) into a conical flask, dissolve it with chlorobenzene, put it into a constant temperature water tank and heat and stir; weigh 10g of hydroxyl double-capped PPO, dissolve in chlorobenzene 10% solution; Weigh 7.125 g of aminopropyl double-capped PDMS, dissolve in chlorobenzene, and make a 10% solution. Pour the PPO solution into the separatory funnel, raise the temperature to 90°C, add the PPO solution dropwise to the conical flask for 40 minutes; after 1 hour of stable reaction, add 3ml of dibutyltin dilaurate dropwise to the conical flask ; After 2.5 hours of stable reaction, drop the PDMS solution into the Erlenmeyer flask with a separatory funnel for 1 hour; after 3 hours of constant reaction, stop heating. Described crosslinking agent, polyphenylene ether, polysiloxane structure are as follows:

[0053]

[0054] The formed cross-linked copolymer structural formula is:

[0055]

[0056] Using chloroform as a solvent ...

Embodiment 3

[0058] Take by weighing 0.205g azobisisobutyronitrile (AIBN) and put it into a conical flask, dissolve it with chlorobenzene, put it into a constant temperature water tank and heat and stir; take by weighing the PPO 10g that is double-terminated by hydroxyl, dissolve it in chlorobenzene, Prepare a 10% solution; weigh 7.125 g of aminopropyl double-capped PDMS, dissolve it in chlorobenzene, and prepare a 10% solution. Pour the PPO solution into the separatory funnel, raise the temperature to 60°C, add the PPO solution dropwise to the conical flask for 2 hours; after 4 hours of stable reaction, add the PDMS solution dropwise to the conical flask with the separatory funnel, Adding time is 2h; after constant reaction for 6h, stop heating. Described crosslinking agent, polyphenylene ether, polysiloxane structure are as follows:

[0059]

[0060] The formed cross-linked copolymer structural formula is:

[0061]

[0062] Using chloroform as a solvent and n-butanol as an additi...

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Abstract

The invention discloses a polysiloxane-polyphenyl ether crosslinked block copolymer and a preparation method and use thereof and belongs to the technical field of high polymers. The preparation method comprises: dissolving a crosslinking agent in a solvent; dissolving polyphenyl ether and polysiloxane in the same solvent respectively, wherein the molar ratio of the crosslinking agent to the polysiloxane to the polyphenyl ether is (2-4):1:1; and reacting, and after the reaction is finished, subjecting the mixture to filtration, precipitation by a precipitator and the like, and removing solvent, catalyst and precipitator to obtain the polysiloxane-polyphenyl ether crosslinked block copolymer. In the formula of the polysiloxane-polyphenyl ether crosslinked block copolymer, R' and corresponding R are shown below. When the polysiloxane-polyphenyl ether crosslinked block copolymer disclosed by the invention is used to prepare an asymmetric film, the surface layer of the prepared film is dense, the supporting layer of the film is like sponge, and the film has high mechanical performance and a prior organic substance permeation property and is suitable for separating organic substance and water systems.

Description

technical field [0001] The invention belongs to the technical field of polymers, and mainly relates to a polysiloxane-polyphenylene ether cross-linked block copolymer used for an alcohol-preferential permeable film, a preparation method and an application. Background technique [0002] Fuel ethanol, as a new, non-polluting, renewable and clean energy, has received extensive attention. The fermentation-pervaporation coupling process uses a permeable membrane to separate ethanol in situ while fermenting, so as to avoid the inhibition of ethanol on the anaerobic fermentation of bacteria and realize continuous operation. The production of anhydrous ethanol by this technology can obtain higher concentration of ethanol Solution, thereby greatly reducing the energy consumption of distillation and concentration in the middle and later stages of traditional production, and improving the economy of fuel ethanol, is one of the most promising separation technologies. [0003] According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/46C08G65/48C08J5/18B01D71/80B01D61/36B01D69/10
Inventor 纪树兰牛洪金秦振平刘威
Owner BEIJING UNIV OF TECH
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