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Preparation method of polymer separation membrane with antibacterial and anti-biological pollution properties

An anti-biological pollution, polymer technology, applied in the direction of semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problems of easy desorption of antibacterial agent modified layer, unfavorable commercial production, loss of anti-pollution ability, etc. , to achieve improved antibacterial and anti-pollution performance, long-lasting anti-pollution effect, and easy operation

Active Publication Date: 2017-09-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above modification methods have the disadvantages of complex steps, low efficiency, and unfavorable commercial production.
In addition, the antibacterial agent is easy to release or the modified layer is easy to desorb, resulting in the loss of anti-pollution ability

Method used

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  • Preparation method of polymer separation membrane with antibacterial and anti-biological pollution properties
  • Preparation method of polymer separation membrane with antibacterial and anti-biological pollution properties
  • Preparation method of polymer separation membrane with antibacterial and anti-biological pollution properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The PVDF separation membrane was soaked in clean water for 24 h to remove the impurities on the surface of the PVDF separation membrane (denoted as M0). Place the pretreated isolate membrane in a polytetrafluoroethylene closed box (single-sided reaction box), add 1 g / L dopamine, use Tris-HCl (10 mM) to adjust the pH=8.0, and place it on a shaker Medium, 250 rpm, 20 o The reaction was carried out at C for 5 h until a gray PDA layer appeared on the membrane. After that, alternately with water and ethanol at 40 o C. Wash at 200 rpm for 24 h. use N 2 Blow dry to obtain a dopamine-coated PVDF separation membrane (denoted as M1). Dissolve 3.0 mL of TMOS in 100 mL of HCl aqueous solution, stir for 30 min, mix with 100 mL of PBS, then place the dopamine-coated PVDF separation membrane in it immediately, react at 25°C for 7 h, wash with water Overnight, get the polyphenolic compound-nanometer silica carrier PVDF membrane (denoted as M2); configure 5mL / 50mL QAC aqueous solut...

Embodiment 2

[0030] Soak the PVDF separation membrane in clean water for 24 h to remove impurities on the surface of the PVDF separation membrane. Place the pretreated isolate membrane in a polytetrafluoroethylene closed box (single-sided reaction box), add 1 g / L dopamine, use Tris-HCl (10 mM) to adjust the pH=8.0, and place it on a shaker Medium, 250 rpm, 20 o The reaction was carried out at C for 5 h until a gray PDA layer appeared on the membrane. After that, alternately with water and ethanol at 40 o C. Wash at 200 rpm for 24 h. use N 2 Blow dry to obtain a dopamine-coated PVDF separation membrane. Dissolve 3.0 mL of TMOS in 100 mL of HCl aqueous solution, stir for 30 min, mix with 100 mL of PBS, then place the obtained dopamine-coated PVDF separation membrane in it immediately, react at 25°C for 7 h, wash with water overnight , to obtain the polyphenolic compound-nanometer silica carrier PVDF membrane; configure 5mL / 50mL QAC aqueous solution (adjust pH=4), place the membrane M2 i...

Embodiment 3

[0032] Soak the PES separation membrane in clean water for 24 h to remove impurities on the surface of the PES separation membrane. Place the pretreated isolate membrane in a polytetrafluoroethylene closed box (single-sided reaction box), add 1 g / L dopamine, use Tris-HCl (10 mM) to adjust the pH=8.0, and place it on a shaker Medium, 250 rpm, 20 o The reaction was carried out at C for 5 h until a gray PDA layer appeared on the membrane. After that, alternately with water and ethanol at 40 oC. Wash at 200 rpm for 24 h. use N 2 Blow dry to obtain a dopamine-coated PES separation membrane. Dissolve 2.0 mL TMOS in 100 mL HCl aqueous solution, stir for 30 min, mix with 100 mL PBS, then place the dopamine-coated PES separation membrane in it immediately, react at 25°C for 7 h, wash with water Overnight, obtain the polyphenolic compound-nano silica carrier PES membrane; configure 5mL / 50mL QAC aqueous solution (adjust pH=4), place the membrane M2 in it, at 25 o C conditions were ...

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Abstract

The invention relates to a preparation method of a polymer separation membrane with antibacterial and anti-biological pollution properties for widely applying into water treatment, and belongs to the field of water treatment science and technique. A modifying method comprises the following steps of soaking the polymer separation membrane into a polyphenol compound solution, and forming a layer of polyphenol compound on the surface thereof; soaking the separation membrane into a silicon source solution, and growing a nanometer silicon dioxide carrier on the surface of the polymerizing isolation membrane in situ through the silicification action; crosslinking and coupling the nanometer silicon dioxide carrier on the surface of the membrane and a quaternary ammonium salt solution, so as to obtain the polymer separation membrane with antibacterial and anti-biological pollution properties. The modified polymer separation membrane has the advantages that the antibacterial ability and anti-pollution ability are obviously improved, the obvious inhibiting function on the propagation of bacteria and microorganisms is realized, and the service life of the membrane is prolonged; the chemical method is used for modifying, the reaction is uniform, the technology is simple, the operation is easy, the high-cost instrument is not needed, and the popularizing is easy; the modifying layer of the prepared quaternary ammonium salt modified polymer separation membrane is firm, the antibacterial ability and anti-pollution ability are good, and the potential wide application value is realized in the field of water treatment.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial and antibiological pollution polymer separation membrane, which belongs to the field of water treatment science and technology. Background technique [0002] With the rapid development of membrane separation technology, the varieties are becoming more and more abundant, and the application fields are also expanding. Among them, membrane separation technologies such as microfiltration, ultrafiltration, nanofiltration and reverse osmosis all have broad industrial applications and markets. Food, biomedicine and other fields play an increasingly important role. However, in the application process of membrane separation technology, membrane fouling is still the biggest problem. In particular, the biofouling caused by the adhesion or growth of microorganisms on the membrane surface has become one of the key factors to reduce the membrane filtration performance. Therefore, it has become a hot...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D69/02B01D67/00
CPCB01D67/0006B01D69/02B01D71/82B01D2325/48
Inventor 王志伟张星冉陈妹平梦王巧英虞雪晴吴志超
Owner TONGJI UNIV
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