Organic-inorganic substances compound membrane and its preparation method

An inorganic composite membrane and organic technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as narrow application range and complicated preparation process, and achieve wide application range, good repeatability, and preparation method simple effect

Active Publication Date: 2005-11-23
JIANGSU JIUMO HIGH TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Most of these methods have complex preparation processes and narrow scope of application

Method used

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  • Organic-inorganic substances compound membrane and its preparation method
  • Organic-inorganic substances compound membrane and its preparation method

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Embodiment 1

[0016] Dissolving 10-100g of montmorillonite in 1L of deionized water, filtering the suspension after ultrasonic dispersion for a certain period of time, and then diluting the obtained clear liquid to 0.1wt%-0.5wt% as anion solution. An aqueous solution of polydipropylene dimethyl ammonium chloride (PDADMAC) with a monomer concentration of 0.005-0.05M was prepared as a cationic solution. After immersing the plasma-treated negatively charged polyacrylonitrile / polyethylene terephthalate support (PAN / PET) in high-purity water for about 1 hour, it is first immersed in a cationic solution for 1 to 30 minutes. Form a positively charged film layer on the surface, then take it out and rinse it with water for 1-10 minutes to wash away the polyions and small molecule electrolyte ions adhering to the surface, and directly immerse in the anion solution for 1-30 minutes without drying to form a negatively charged film layer. Then wash with water for 1 to 10 minutes, and complete the above-...

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Abstract

This invention relates to an organic mineral complex film used for osmotic evaporating and separating the near or constant boiling point mixture. Said film comprises montmorillonite anion and ammonium salt or ammonium polyelectrolyte cation which alternating deposit on the sheet or pipe type surface of the supporting. The preparing method comprises the following steps: immersing the supporting body with minus electricity alternatively in the polyelectrolyte cation solution and the montmorillonite anion solution, and the electrolyte with opposite charge alternatively deposit in the liquor-solid interface through the electrostatic action; flushing the ion and small molecule electrolyte ion sticking in the surface after each immersion. It can control the number of the plies through controlling the number of immersion, then to control the film thickness.

Description

technical field [0001] The invention relates to an organic-inorganic composite membrane which can be used for pervaporation and a preparation method thereof. Background technique [0002] The pervaporation technology developed in recent years is a membrane permeation process with a phase change. Driven by the partial pressure difference of the component vapor in the liquid mixture, the separation process is realized by using the different dissolution and diffusion speeds of the components through the dense membrane. Under certain conditions, the selectivity of pervaporation membrane can be very high. Therefore, for some separation systems that use conventional separation methods with high energy consumption or high cost, especially for the separation of near-boiling and azeotropic mixtures, pervaporation technology can often be used. its advantages. Membrane materials are the key to pervaporation separation technology and the core of membrane technology. In recent years, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12
Inventor 徐南平金万勤相里粉娟陈祎玮
Owner JIANGSU JIUMO HIGH TECH CO LTD
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