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Room temperature curable organopolysiloxane composition and gas separation membrane

A polysiloxane and organo-based technology, applied in the field of room temperature curable organopolysiloxane compositions, can solve problems such as not mentioned

Active Publication Date: 2013-01-02
TOKYO METROPOLITAN PUBLIC UNIV CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this composition is capable of providing a cured film with high strength without the use of reinforcing fillers, this composition has been developed as a conductive or electronic coating agent or an antifouling coating agent, and the patent application does not mention at all as a coating agent for Application of matrix components with special functional particles, such as separation membranes

Method used

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  • Room temperature curable organopolysiloxane composition and gas separation membrane
  • Room temperature curable organopolysiloxane composition and gas separation membrane
  • Room temperature curable organopolysiloxane composition and gas separation membrane

Examples

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preparation example Construction

[0104] Preparation of the composition

[0105] The composition of the present invention can be prepared by uniformly mixing components (I) to (IV) and other optionally added components.

[0106] Application of the composition

[0107] The compositions of the present invention provide gas separation membranes with significantly improved gas permeability, gas selectivity and other functions, in particular improved permselectivity of hydrogen from gas mixtures, permselectivity of oxygen from air, carbon dioxide Permselectivity from greenhouse gases and methane from natural gas, etc., because it contains silica nanoparticles with a surface modified with a branched structure between branches Provides free volume, especially for gas permeability.

[0108] Based on this performance, the product of the present invention can be used to selectively permeate hydrogen from mixed gases, recover oxygen from air, provide high-concentration oxygen for combustion systems, separate and recove...

Embodiment 1

[0144] Fabrication of Organic-Inorganic Hybrid Gas Separation Membrane Using Polydimethylsiloxane and Colloidal Silica Surface Modified with Hyperbranched Structure

[0145] The uncrosslinked polydimethylsiloxane prepared in 1.5g of synthesis example 1 was dissolved in 6.921ml of toluene, and the surface of the prepared in synthesis example 5 was modified with hyperbranched structure 6 (3 generations) Colloidal dimethicone Silica was added to the polymer solution so that the polymer content was 20% by weight. After ultrasonication for 1 hour, the polymer solution was stirred overnight at a stirring rate of 1200 rpm, and after adding 0.25 g of vinyltrimethylethylketoximosilane (crosslinking agent) and γ-aminopropyltriethoxysilane After 10:1 mixture (weight ratio), the mixture was cast onto Teflon (registered trademark) dishes. The Teflon (registered trademark) dish was left at room temperature for several days to prepare a hybrid film. The resulting hybrid film was dried unde...

Embodiment 2

[0149] Fabrication of Organic-Inorganic Hybrid Gas Separation Membrane Using Polydimethylsiloxane and Colloidal Silica with Hyperbranched Structure Modified Surface

[0150] Repeat the process of Example 1, add colloidal silica with hyperbranched structure 4 (1 generation) modified surface obtained in Synthesis Example 5 as colloidal silica with hyperbranched structure modified surface to prepare organic-inorganic Hybrid gas separation membrane. The gas permeability of the resulting hybrid membrane was measured by repeating the procedure of Example 1. The results are shown in Table 1.

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Abstract

A room temperature curable organopolysiloxane composition is provided. The composition comprises (I) an organopolysiloxane which is a condensation product of component (A) (an organopolysiloxane comprising R 3 SiO 1 / 2 unit and SiO 4 / 2 unit and containing 0.02 to 0.12 mol / 100 g of hydroxy group bonded to the silicon atom) and component (B) (a diorganopolysiloxane raw rubber having hydroxy group on opposite ends thereof), (II) an organosilane compound having at least 2 hydrolyzable groups bonded to the silicon atom on average per molecule, and / or its partial hydrolytic condensate, (III) a solvent, and (IV) a silica nano particle having its surface modified by a branch structure. The composition is capable of providing a high strength film without incorporating reinforcement fillers, with no curing inhibition by the inorganic nano particles, and without inhibiting gas separation performance realized by the inorganic nano particles.

Description

technical field [0001] The present invention relates to a room temperature curable organopolysiloxane composition capable of producing a membrane having high gas separation performance, and a gas separation membrane produced by curing the above composition. Background technique [0002] As part of nanotechnology research, research on nanoscale fine particles (nanoparticles) having an average particle diameter of about 1 nanometer to several hundred nanometers has been active recently. Compared with conventional bulk materials, it has been found that nanoparticles prepared by using nano-sized raw materials can exhibit and be endowed with various functions and properties, and their various applications in industrial fields have been considerably expanded. [0003] Nanoparticles can be prepared in the form of primary particles. However, primary particles tend to agglomerate due to their fine particle size, and when not further processed therein, these primary particles form ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08K9/06C08K3/36C08K5/544C08G77/16B01D71/70B01D53/22
CPCC08G77/70Y02C20/20C08J5/18B01D69/141B01D53/228C08K3/36C08L2666/14B01D71/70C08L83/04C08G77/16C08K5/5419C08L83/00Y10T428/2993Y10T428/2995Y10T428/2991Y10T428/2998B01D71/701B01D69/14111
Inventor 川上浩良长谷部翔一木村恒雄
Owner TOKYO METROPOLITAN PUBLIC UNIV CORP
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