Method for preparing polymer porous membrane without solvent

A porous membrane and polymer technology, applied in the field of solvent-free preparation of polymer porous membranes, can solve the problems of poor biotoxicity and biodegradability of organic solvents, difficult recovery of organic solvents, and difficult treatment of membrane-making wastewater. The effect of solvent cost, reduced membrane cost, and excellent anti-pollution ability

Inactive Publication Date: 2012-08-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Second, the cost of using organic solvents is higher
Since the mass ratio of organic solvents in the casting solution is usually 60%-90%, the cost is relatively high
Third, the recovery of organic solvents is difficult
Organic solvent recovery is generally recovered by vacuum distillation or rectification. Due to the high boiling point of organic solvents for membrane production and the low concentration of organic solvents in membrane wastewater (usually less than 8%), the recovery energy consumption is high and the recovery economy is poor.
At the same time, due to the biological toxicity and poor biodegradability of organic solvents, the treatment of membrane wastewater is also quite difficult.

Method used

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  • Method for preparing polymer porous membrane without solvent
  • Method for preparing polymer porous membrane without solvent
  • Method for preparing polymer porous membrane without solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 2g of organic monomer hydroxyethyl methacrylate HEMA, 0.1g of initiator BPO, 0.5g of porogen TEOS, measure 80μL of cross-linking agent HDODA, mix and prepare a casting solution, and ultrasonically treat for 5min under nitrogen protection. Measure the casting solution with a volume of 20 μL and drop it on one end of the first glass piece (75mm*25mm), cover the casting solution on the first glass piece with one end of the second glass piece (75mm*25mm), and translate the second piece of glass The two glass sheets overlap the two glass sheets, and the casting solution is spread between the two glass sheets to form a liquid film. Transfer the two glass sheets sandwiched with the casting liquid film to a vacuum oven for heat treatment at 80°C under normal pressure for 24 hours, take it out and cool it to room temperature. Immerse the glass sheet with the solid film attached in 100mL of 1% hydrofluoric acid HF, the film is automatically peeled off from the glass sheet, ...

Embodiment 2

[0019] Weigh 2 g of organic monomer hydroxyethyl methacrylate HEMA, 0.1 g of initiator BPO, 2 g of porogen TEOS, and measure 80 μL of cross-linking agent HDODA, mix and prepare the casting solution, and ultrasonicate for 5 min under nitrogen protection. Measure the casting solution with a volume of 20 μL and drop it on one end of the first glass piece (75mm*25mm), cover the casting solution on the first glass piece with one end of the second glass piece (75mm*25mm), and translate the second piece of glass The two glass sheets overlap the two glass sheets, and the casting solution is spread between the two glass sheets to form a liquid film. Transfer the two glass sheets sandwiched with the casting liquid film to a vacuum oven for heat treatment at 80°C under normal pressure for 24 hours, take it out and cool it to room temperature. Immerse the glass sheet with the solid film attached in 100mL of 1% hydrofluoric acid HF, the film is automatically peeled off from the glass sheet...

Embodiment 3

[0022] Weigh 2g of organic monomer hydroxyethyl methacrylate HEMA, 0.1g of initiator BPO, 6g of porogen TEOS, measure 80μL of cross-linking agent HDODA, mix and prepare the casting solution, and ultrasonically treat for 5min under nitrogen protection. Measure the casting solution with a volume of 20 μL and drop it on one end of the first glass piece (75mm*25mm), cover the casting solution on the first glass piece with one end of the second glass piece (75mm*25mm), and translate the second piece of glass The two glass sheets overlap the two glass sheets, and the casting solution is spread between the two glass sheets to form a liquid film. Transfer the two glass sheets sandwiched with the casting liquid film to a vacuum oven for heat treatment at 80°C under normal pressure for 24 hours, take it out and cool it to room temperature. Immerse the glass sheet with the solid film attached in 100mL of 1% hydrofluoric acid HF, the film is automatically peeled off from the glass sheet, ...

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Abstract

The invention discloses a method for preparing polymer porous membrane without solvent. The method includes steps of utilizing benzoyl peroxide as trigger and hexamethylene diacrylate as crosslinking agent, subjecting liquid-phase monomer methyl acrylic hydroxy ethyl ester to bulk polymerization between two glass sheets through thermal initiation, crosslinking and curing to forming a membrane; meanwhile, forming silica particles by porogen tetraethoxysilane through sol melting and gelling during membrane forming , and removing the silica particles to forming pores after membrane forming. The method for preparing polymer porous membrane has no needs of organic solvent and is environment-friendly, expense on solvent can be saved, solvent recycling process is omitted, and membrane forming cost is reduced. The surface of the membrane prepared by the method is high in hydrophilcity, low in protein adsorption and adjustable in thickness and expresses high flux, excellent separation effect and pollution-resistance performance when used for bioseparation.

Description

technical field [0001] The invention relates to a solvent-free preparation method of a polymer porous membrane, belonging to the technical field of porous membrane preparation. Background technique [0002] Commonly used porous membrane preparation methods (mainly immersion precipitation phase inversion method, solvent evaporation method, etc.) all need to use a large amount of organic solvents. Organic solvents mainly play the following two roles in the polymer membrane preparation process. On the one hand, the solvent is used as a dissolution medium, mixed with the film-forming polymer and various additives to form a homogeneous casting solution. On the other hand, the solvent plays an important role in the structure formation of the membrane during the phase inversion process. In the immersion precipitation phase inversion method, a solvent exchange between an organic solvent and a non-solvent (usually water) causes the phase inversion to occur. The film-forming polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/26C08L33/14B01D67/00B01D71/72
Inventor 姜忠义苏延磊彭金明
Owner TIANJIN UNIV
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