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Method for preparing structure controlled temperature-sensitive polyvinylidene fluoride flat separation membrane and product

A technology of polyvinylidene fluoride and separation membrane, applied in semipermeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of complex process and inconspicuous temperature sensitivity performance, and achieve simple method and high temperature sensitivity performance Good, easy industrial implementation effect

Inactive Publication Date: 2011-06-15
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention directly carries out ATRP grafting on the PVDF flat film, which overcomes the defects that the temperature-sensitive PVDF-g-PNIPAAm graft copolymer is first synthesized and then formed into a film, the process is complicated, and the temperature-sensitivity performance is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of PVDF flat membrane. Weigh a certain amount of PVDF powder and PEG with a molecular weight of 10,000 and put them into a beaker, take a certain amount of DMF as a solvent, control the solid content of PVDF at 16%, and control the mass content of PEG at 6%. Place the beaker in a 60°C water bath and dissolve the solids under magnetic stirring. The dissolved solution was placed in a vacuum oven for degassing at room temperature for 30 minutes. Use a glass rod wrapped with copper wire to scrape the film on the glass plate, put the glass plate in a water bath at 20°C, take off the shed plate film after 5 minutes and soak it in distilled water for one day, then move it into a liquid with a volume ratio of 1: 1 solution of glycerin solution for 4 days. The membrane was taken out and freeze-dried for 24 hours to obtain a PVDF flat membrane.

[0025] (2) Temperature-sensitive modification of PVDF flat membrane. Weigh Me 6 Put Tren 0.06g and CuCl 0.01g in a...

Embodiment 2

[0027] (1) Preparation of PVDF flat membrane. Weigh a certain amount of PVDF powder and PEG with a molecular weight of 10000 and put them into a beaker, take a certain amount of DMF as a solvent, control the solid content of PVDF at 18%, and control the mass content of PEG at 10%. Place the beaker in a 70°C water bath and dissolve the solids under magnetic stirring. Put the dissolved solution in a vacuum oven for degassing at room temperature for 30-60 minutes. Use a glass rod wrapped with copper wire to scrape the film on the glass plate, put the glass plate in a water bath at 30°C, take off the shed plate film after 5 minutes and soak it in distilled water for one day, and then move it into a volume ratio of 1: Soak in 1 glycerin water solution for 2-4 days. The membrane was taken out and freeze-dried for 24 hours to obtain a PVDF flat membrane.

[0028] (2) Temperature-sensitive modification of PVDF flat membrane. Weigh Me 6 Put Tren 0.06g and CuCl 0.01g in a 100ml thr...

Embodiment 3

[0030](1) Preparation of PVDF flat membrane. Weigh a certain amount of PVDF powder and PEG with a molecular weight of 10000 and put them into a beaker, take a certain amount of DMF as a solvent, control the solid content of PVDF at 18%, and control the mass content of PEG at 8%. Place the beaker in a 60°C water bath and dissolve the solids under magnetic stirring. The dissolved solution was placed in a vacuum oven for degassing at room temperature for 60 minutes. Use a glass rod wrapped with copper wire to scrape the film on the glass plate, put the glass plate in a water bath at 30°C, take off the shed plate film after 5 minutes and soak it in distilled water for one day, and then move it into a volume ratio of 1: 1 solution of glycerin solution for 4 days. The membrane was taken out and freeze-dried for 24 hours to obtain a PVDF flat membrane.

[0031] (2) Temperature-sensitive modification of PVDF flat membrane. Weigh Me 6 Tren 0.065 and CuCl 0.015 in a 100ml three-nec...

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PUM

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Abstract

The invention discloses a method for preparing a structure controlled temperature-sensitive polyvinylidene fluoride (PVDF) flat separation membrane and a product thereof, belongs to the technical field of membranes, and particularly relates to an intelligent polymeric membrane technology. According to the structure controlled temperature-sensitive polyvinylidene fluoride flat separation membrane, the flat separation membrane has temperature response property at the temperature of between 27 and 32 DEG C, and the flat separation membrane can be prepared by the following method of preparation of the PVDF flat membrane and temperature-sensitive modification of the PVDF flat membrane. The method prepares the temperature response PVDF flat separation membrane, the pure water flux of the membrane is abruptly increased at the temperature of 27 to 32 DEG C, the interception rate of the membrane on bovine serum albumin and the like is abruptly reduced, and the abrupt change amplitude reaches over 40 percent. The product is simple in process and low in cost, does not need special equipment, is easy for industrialized implementation, and has good membrane temperature sensitivity.

Description

technical field [0001] The invention belongs to the field of membrane technology, in particular to an intelligent polymer membrane technology. Background technique [0002] In recent years, the research on temperature-responsive polymer separation membranes has become increasingly hot. For the preparation of temperature-responsive polymer separation membranes, in addition to using temperature-sensitive copolymers as raw materials and forming membranes by phase inversion methods, temperature-sensitive separation membranes can also be prepared by modifying the base membrane. From the current research, there are two types of basement membrane modification: one is to graft the temperature-sensitive polymer onto the surface of the membrane through surface adsorption or chemical grafting (grafting to); the other is to induce the temperature-sensitive monomer and its The oligomers are grafted onto the membrane surface (grafted on). [0003] Polyvinylidene fluoride (PVDF) has good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/06B01D67/00
Inventor 赵义平陈莉赵海洋林先凯冯霞申向
Owner TIANJIN POLYTECHNIC UNIV
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