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Preparation method of inorganic nano-hybrided and positively-charged polyelectrolyte complex pervaporation membrane

A technology of polyelectrolyte and inorganic nanometers, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve the problems of poor mechanical properties, increase the mechanical properties of polymer membranes, and poor stability, and achieve simple and high-efficiency methods. Effect of permeation flux and separation selectivity, excellent water resistance

Active Publication Date: 2015-12-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with inorganic membranes, polymer membranes usually have poor mechanical properties and poor stability during operation, and organic-inorganic hybridization is an effective method to increase the mechanical properties of polymer membranes.

Method used

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Effect test

Embodiment 1

[0015] A method for preparing an inorganic nanometer hybrid positively charged polyelectrolyte complex pervaporation membrane, comprising the steps of:

[0016] (1) Preparation of inorganic nano-hybrid positively charged polyelectrolyte complex: at 40 ° C, 50 mg of acidified multi-walled carbon nanotubes were added into 20 kg of 0.05% PVS aqueous solution with a mass fraction of 0.05% under stirring and ultrasound to obtain Aqueous PVS solution doped with acidified multi-walled carbon nanotubes; prepare a CS hydrochloric acid solution with a pH value of 5.8 and a mass fraction of 0.03%; add the aqueous solution of PVS doped with acidified multi-walled carbon nanotubes dropwise at a rate of 50ml / min into the CS hydrochloric acid solution , after precipitation, washing, and drying at 60°C for 12 hours, the acidified multi-walled carbon nanotube hybrid PVS / CS complex was obtained;

[0017] (2) Preparation of film-casting liquid: at 60° C., a 0.3% acidified multi-walled carbon nan...

Embodiment 2

[0020] A method for preparing an inorganic nanometer hybrid positively charged polyelectrolyte complex pervaporation membrane, comprising the steps of:

[0021] (1) Preparation of inorganic nano-hybrid positively charged polyelectrolyte complex: at 40°C, add 100 mg of graphene oxide into 2 kg of 0.1% PSS aqueous solution with stirring and ultrasound to obtain doped oxide The PSS aqueous solution of graphene; The CS acetic acid solution that preparation pH value is 6 mass fractions is 0.3%; The PSS aqueous solution of doping graphene oxide is added dropwise in the CS acetic acid solution with the speed of 15ml / min, through precipitation, washing, at 40 Bake at ℃ for 36 hours to obtain graphene oxide hybrid PSS / CS complex;

[0022] (2) Preparation of casting solution: at 10° C., prepare a 3% graphene oxide hybrid PSS / CS complex casting solution with a mass fraction of 0.5% acetic acid aqueous solution;

[0023] (3) Preparation of inorganic nano-hybrid positively charged polyele...

Embodiment 3

[0025] A method for preparing an inorganic nanometer hybrid positively charged polyelectrolyte complex pervaporation membrane, comprising the steps of:

[0026] (1) Preparation of inorganic nano-hybrid positively charged polyelectrolyte complex: at 10°C, 100 mg of nano-silica particles were added into 3 kg of DSS aqueous solution with a mass fraction of 0.1% under stirring and ultrasound to obtain a doped polyelectrolyte complex. The DSS aqueous solution of miscellaneous nano-silica particles; the preparation pH value is 9 mass fractions and is the PEI formic acid solution of 0.1%; The DSS aqueous solution doped with silicon dioxide is added dropwise in the PEI formic acid solution at the speed of 30ml / min, through precipitation, Washing and drying at 40°C for 36 hours to obtain a nano-silica particle hybrid DSS / PEI complex;

[0027] (2) Preparation of casting solution: at 30° C., prepare a 2% nano-silica particle hybrid DSS / PEI complex casting solution with a mass fraction of...

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Abstract

The invention discloses a preparation method of an inorganic nano-hybrided and positively-charged polyelectrolyte complex pervaporation membrane. An inorganic nanoparticle hybrided anionic polyelectrolyte aqueous solution is prepared; a cationic polyelectrolyte aqueous solution with pH (potential of hydrogen) being 5.8-10.0 is prepared; the inorganic nanoparticle hybrided anionic polyelectrolyte aqueous solution is dropwise added to the cationic polyelectrolyte aqueous solution, and an inorganic nano-hybrided and positively-charged polyelectrolyte complex is obtained; the complex is dispersed in a monobasic acid aqueous solution, filtered and left to stand for defoaming, a polysulfone ultrafiltration membrane is coated with the complex through a film wiping knife, and the inorganic nano-hybrided and positively-charged polyelectrolyte complex pervaporation membrane is obtained after drying. The inorganic nano-hybrided and positively-charged polyelectrolyte complex with different composition can be obtained by doping inorganic nanoparticles at different mass percentages and adjusting the pH value of the cationic polyelectrolyte solution. The prepared inorganic nano-hybrided and positively-charged polyelectrolyte complex pervaporation membrane has excellent separation performance and high stability.

Description

technical field [0001] The invention belongs to the fields of polymer material preparation and membrane separation, and in particular relates to a method for preparing an inorganic nanometer hybrid positively charged polyelectrolyte complex pervaporation membrane. Background technique [0002] As a membrane separation technology, pervaporation uses membranes to dissolve and diffuse different components in the feed liquid to achieve the separation of different components. It has the characteristics of high efficiency, energy saving, simple operation, and easy scale-up. This technology can effectively separate near-boiling and azeotropic mixed solutions, and can also be used to remove trace moisture in organic matter. It has broad application prospects and markets in petrochemical, pharmaceutical, food and environmental protection and other fields. Pervaporation can also be integrated with separation technologies such as distillation to better utilize the advantages of high ef...

Claims

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Application Information

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IPC IPC(8): B01D69/10B01D71/44B01D71/08B01D67/00B01D61/36
Inventor 安全福吴家凯叶纯纯
Owner ZHEJIANG UNIV
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