Unlock instant, AI-driven research and patent intelligence for your innovation.

Modification method for improving bacterium resistance by armoring POSS (Polyhedral Oligomeric Silsesquioxane) on surface of polyamide reverse osmosis membrane

A technology of reverse osmosis membrane and polyamide, applied in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of being susceptible to bacterial contamination, and achieve improved anti-bacterial contamination, convenient preparation, high anti-bacterial performance effect

Inactive Publication Date: 2017-11-24
HARBIN INST OF TECH
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for modifying the surface of a POSS armored polyamide reverse osmosis membrane to improve bacterial resistance in order to overcome the problem that the reverse osmosis membrane in the prior art is susceptible to bacterial contamination during use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modification method for improving bacterium resistance by armoring POSS (Polyhedral Oligomeric Silsesquioxane) on surface of polyamide reverse osmosis membrane
  • Modification method for improving bacterium resistance by armoring POSS (Polyhedral Oligomeric Silsesquioxane) on surface of polyamide reverse osmosis membrane
  • Modification method for improving bacterium resistance by armoring POSS (Polyhedral Oligomeric Silsesquioxane) on surface of polyamide reverse osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0023] Specific embodiment one: what this embodiment records is a kind of modification method that the surface of POSS armored polyamide reverse osmosis membrane improves bacterial resistance, and the concrete steps of described method are as follows:

[0024] Step 1: the configuration mass fraction is the mixed solution of 2.3% camphorsulfonic acid, 0.1% sodium dodecylbenzenesulfonate and 2% m-phenylenediamine;

[0025] Step 2: Immerse the surface of the polyethersulfone base membrane in the mixed solution prepared in Step 1 for 10 minutes;

[0026] Step 3: Take out the polyethersulfone base membrane in step 2, let it dry in the air for 5-10 minutes, and remove the excess mixed solution on the surface of the polyethersulfone base membrane;

[0027] Step 4: Submerge the polyethersulfone base membrane obtained in Step 3 in 1,3,5-trimesoyl chloride n-hexane solution with a mass fraction of 0.1%, and keep it for 1 min;

[0028] Step 5: Take out the polyethersulfone base membrane...

specific Embodiment approach 2

[0031] Specific embodiment two: the modification method that the surface of a kind of POSS armored polyamide reverse osmosis membrane described in specific embodiment one improves antibacterial resistance, in step 6, described POSS-NH 2 ·The mass fraction of HCl is 0.1~1%.

specific Embodiment approach 3

[0032] Embodiment 3: In Embodiment 1, a method for modifying the surface of a POSS armored polyamide reverse osmosis membrane to improve bacterial resistance, in step 6, the retention time is 5 to 10 minutes.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a modification method for improving the bacterium resistance by armoring POSS (Polyhedral Oligomeric Silsesquioxane) on the surface of a polyamide reverse osmosis membrane, and belongs to the field of material modification. The method comprises the following steps: (1) preparing a mixed solution of camphorsulfonic acid, sodium dodecylbenzene sulfonate and m-phenylenediamine; (2) immersing the surface of a polyethersulfone-based membrane into the mixed solution; (3) taking out the polyethersulfone-based membrane, and airing in air for 5min to 10min; (4) immersing the polyethersulfone-based membrane into a 1,3,5-benzenetricarbonyl trichloride n-hexane solution and keeping for 1min; (5) taking out the membrane, and airing in the air for 2min; (6) immersing the membrane into a POSS-NH2,HCl water solution, and keeping for 1min to 15min; (7) putting the membrane into a baking oven at 40 DEG C to 80 DEG C, and reacting for 10min to 20min; then taking out the membrane, and storing at 4 DEG C. The modification method provided by the invention has the advantages that the migration of POSS-NH2.HCl in a utilization process can be avoided; meanwhile, a novel physical protection function layer is formed on the surface of the reverse osmosis membrane, and the reverse osmosis membrane has high bacterial pollution resisting performance. The method has a simple technology and is convenient for preparation.

Description

technical field [0001] The invention belongs to the field of material modification, and in particular relates to a method for modifying the surface of a POSS armored polyamide reverse osmosis membrane to improve bacteria resistance. Background technique [0002] Membrane separation technology is a new type of separation technology, which has the characteristics of green, high efficiency and environmental protection, and has been widely used. Reverse osmosis membrane is a separation membrane capable of intercepting small molecular salts. It is commonly used in household water purification and other fields, and has broad prospects. The reverse osmosis membrane will be polluted by microorganisms during long-term use, and the microorganisms will adhere to the surface of the reverse osmosis membrane during operation, reducing the service life of the reverse osmosis membrane. Therefore, it is a problem to be solved urgently to modify the surface of the reverse osmosis membrane to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D69/02B01D67/00B01D61/02
CPCB01D61/025B01D67/0002B01D69/02B01D71/82B01D2323/46B01D2325/48
Inventor 张春华刘雅薇林欧凯魏芮
Owner HARBIN INST OF TECH