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Preparation method and application of modified polypropylene non-woven fabric

A polypropylene non-woven fabric and modified technology, applied in textiles and papermaking, fiber treatment, adsorbed water/sewage treatment, etc., can solve the problems of affecting the adsorption separation effect, low saturation equilibrium adsorption capacity, and large apparent pore size, etc. The effect of low price, large saturated adsorption capacity and large water flux

Inactive Publication Date: 2013-03-13
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the melt-blown polypropylene nonwoven material has the characteristics of small average fiber diameter and large apparent pore size, the mechanical properties of this fabric are low after grafting, and a large number of broken fibers will fall off during repeated applications, which will affect its adsorption and separation effect.
The mechanical properties of polypropylene monofilament fabric are extremely excellent, which also leads to its low grafting rate and low saturated equilibrium adsorption capacity.

Method used

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  • Preparation method and application of modified polypropylene non-woven fabric
  • Preparation method and application of modified polypropylene non-woven fabric
  • Preparation method and application of modified polypropylene non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Measure a certain amount of monomer methacryloylpropyltrimethylammonium chloride (MAPTAC) with a monomer content of 50wt%, add ethanol, and prepare 40ml of a MAPTAC solution with a concentration of 20wt%; weigh the photosensitizer diphenylmethane Ketone (BP) 0.4g, crosslinking agent methylenebisacrylamide (MDAC) 1.08g, nonionic surfactant Tween 80 is 0.54g; add crosslinking agent and surfactant to the monomer solution and mix at low speed Stir, and at the same time add the photosensitizer BP into the ethanol solution to dissolve, and then mix the above two solutions evenly to obtain the grafting solution. Measure 20ml of the above-mentioned grafting solution in a crystallization dish, wash a 10×15cm dish with acetone and hot water 2 Polypropylene spunbonded non-woven fabric (about 2.0g) is put into a crystallization dish for padding for 10 minutes, taken out and placed in a glass container of an ultraviolet light reaction instrument (100W mercury lamp light source), and...

Embodiment 2

[0029] Using ethanol as a solvent, prepare 20ml of a monomeric diallyldimethylammonium chloride (DADMAC) solution with a concentration of 40wt%; weigh 0.2g of photosensitizer benzophenone (BP), crosslinker methylene di Acrylamide (MDAC) 0.54g, surfactant Tween 80 is 0.27g; add cross-linking agent and surfactant to monomer solution and mix at low speed, meanwhile add photosensitizer BP to ethanol solution to dissolve; The two solutions are mixed evenly to obtain the grafting liquid.

[0030] Put the grafting solution in a crystallization dish, and put a 10×15cm dish that has been washed with acetone and hot water 2Put the polypropylene spunbonded non-woven fabric (about 2.0g) into the crystallization dish for padding for 10 minutes, take out the cloth soaked in the grafting liquid, put it in the glass container of the ultraviolet light reaction instrument (100W mercury lamp light source), and then pump it repeatedly Vacuum, send nitrogen three times, and then feed nitrogen as ...

Embodiment 3

[0032] Take ethanol as solvent, prepare 40ml MAPTAC concentration and be the solution of 30wt%, take by weighing photosensitizer BP0.4g, cross-linking agent MDAC1.08g, Tween 800.54g; Prepare grafting liquid and carry out grafting treatment according to embodiment 1 method, obtain Modified polypropylene spunbonded nonwoven fabric with a graft rate of 90.6%.

[0033] Referring to accompanying drawing 2, it is the scanning electron micrograph of the modified polypropylene nonwoven fabric surface and section that the present embodiment provides; Among the figure, c and d figure are respectively the scanning electron micrograph of fabric surface and section after grafting, from the figure It can be seen that there is a thick graft layer wrapped around the fabric. From this aspect, it can also be explained that the cationic monomer has been successfully grafted to the polypropylene fabric.

[0034] See attached image 3 , which is the infrared spectrum of the modified polypropylene ...

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Abstract

The invention discloses a modified polypropylene non-woven fabric, its preparation method and application. The preparation method comprises: impregnating a polypropylene non-woven fabric in a grafting solution containing a graft monomer, a crosslinking agent, a non-ionic surfactant and a photosensitizer, and initiating graft polymerization under ultraviolet irradiation, thus obtaining the modified polypropylene non-woven fabric, which can be widely used in adsorption separation treatments of dye wastewater, heavy metal ion wastewater, inorganic anion acid radical-containing chemical wastewater and the like as a filtering material. The modified polypropylene non-woven fabric provided by the invention has the characteristics of high mechanical strength, large water flux, and great saturated adsorption capacity. Meanwhile, after being subjected to a regeneration treatment in a cationic surfactant-containing ethanol solvent desorption solution, the adsorbed filtering material can be recycled.

Description

technical field [0001] The invention relates to a graft-modified polypropylene non-woven fabric, a preparation method, and its use as a filter material for adsorption and separation treatment of dye wastewater and chemical wastewater. Background technique [0002] At present, membrane separation technology has been widely concerned and applied. With the development of physical chemistry, polymer science, biomedicine, environmental science and other disciplines, new membrane materials and membrane technology continue to emerge, and people have higher and higher requirements for membrane performance, such as good thermal stability and chemical stability. , resistance to microbial degradation, etc. Existing polymer separation membranes mainly include reverse osmosis membranes, nanofiltration membranes, ultrafiltration membranes, and microfiltration membranes. Generally, porous membranes (nanofiltration membranes, ultrafiltration membranes, and microfiltration membranes) have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M14/28C02F1/28
Inventor 朱新生刘颖宋欢石小丽艾丽潘志娟张洪波
Owner SUZHOU UNIV
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