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Amphiphilic polymeric micro-spherical material uniform in grain size, preparation method and application

An amphiphilic polymer, uniform technology, applied in chemical instruments and methods, water pollutants, adsorbed water/sewage treatment, etc. problems such as low benzene yield, to achieve the effects of low raw material cost, good particle size uniformity, and favorable promotion

Active Publication Date: 2019-06-28
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of N-vinylpyrrolidone-divinylbenzene produced in the prior art, such as low yield, uneven particle size, and unsatisfactory adsorption effect, the present invention aims to develop a new emulsion-micelle-suspension polymerization method , this method can efficiently prepare amphiphilic polymer resin materials with uniform particle size, and the material has excellent enrichment, separation and adsorption removal performance for hydrophilic and hydrophobic organic compounds in water

Method used

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  • Amphiphilic polymeric micro-spherical material uniform in grain size, preparation method and application
  • Amphiphilic polymeric micro-spherical material uniform in grain size, preparation method and application
  • Amphiphilic polymeric micro-spherical material uniform in grain size, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The steps of the amphiphilic polymer adsorption material prepared in this example are as follows:

[0041](1) Preparation of oil phase: Add 2g of N-vinylpyrrolidone and 3g of divinylbenzene to 15ml of toluene solution containing 0.05g of AIBN respectively, and mix well in ice bath to obtain the first oil phase and the second oil phase respectively. The total volume of toluene It is 74% of the total volume of the first oil phase and the second oil phase, and the total mass of the initiator AIBN accounts for 1% of the total mass of N-vinylpyrrolidone and divinylbenzene.

[0042] (2) Configure the water phase: add 0.5 g of emulsifier SDS and 0.25 g of dispersant HEC into 100 mL of aqueous solution; the amount of emulsifier is 0.49% of the total mass of the water phase, and the amount of dispersant is 0.25% of the total mass of the water phase;

[0043] (3) The water phase is divided into two parts, which are respectively recorded as the first water phase and the second wat...

Embodiment 2

[0053] Other conditions were the same as in Example 1, and the influence of different porogen dosages on the material properties was tested. The experimental results are shown in Table 2.

[0054] Table 2 The properties of materials produced by different amounts of porogens

[0055]

[0056] It can be seen from Table 2 that the amount of porogen is in the range of 10%-75% of the total volume of the oil phase. With the increase of the amount of porogen, the particle size gradually becomes smaller, and the properties of the produced materials are within the required range. However, the amount of porogen used is too low, and the particle size of the polymeric material is too large. If the amount of porogen is too high, the solution will easily become a paste and cannot be polymerized into microspheres. If the amount of porogen is too high or too low, the performance of the polymer material will be affected.

Embodiment 3

[0058] Other conditions are the same as in Example 1, and the influence of different initiator dosages on the material properties is tested, and the experimental results are shown in Table 3.

[0059] The performance of the material produced by different initiator dosages of table 3

[0060]

[0061]

[0062] As can be seen from Table 3, the amount of the initiator has little effect on the particle size within the range of 0.5%-3% of the total amount of monomers, but has a certain impact on the yield. With the reduction of the initiator content, the yield decreases. However, if the amount of the initiator is too low, the reaction cannot be initiated, and if the amount of the initiator is too high, it will cause implosion and make the polymers agglomerate together.

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Abstract

The invention discloses an amphiphilic polymeric micro-spherical material uniform in grain size, a preparation method and an application and belongs to the field of high molecular materials and solvesthe problems that an existing preparation method is hard to regulate grain size, low in polymer yield, poor in application effect and the like. The preparation method comprises the following steps: by taking N-vinyl pyrrolidone and divinylbenzene as a monomer, dispersing an emulsion uniformly in a water phase by a certain way; strengthening affiliation of the hydrophobic monomer divinylbenzene and the hydrophilic monomer N-vinyl pyrrolidone to increase the yield by means of proper water phase composition and proportion; and carrying out polymerization in conditions of a strict temperature androtating speed and the like to finally obtain the amphiphilic polymeric resin material uniform in grain size. Through serial representation and application evaluation, the material has very excellentamphiphilic performance, has a wide broad enriching and separating property to organic matters in a water body, and can be separately applied to the fields of analysis, detection, water treatment projects, household water purification and the like according to the grain sizes.

Description

technical field [0001] The invention belongs to the field of preparation methods and applications of polymer materials, and in particular relates to an amphiphilic polymer microsphere material with uniform particle size, a preparation method and applications thereof. Background technique [0002] In recent years, environmental pollution has received more and more attention. Emerging organic pollutants have become a research hotspot in recent years. Although the environmental concentration is low, they have become a problem to be solved urgently because of their wide distribution and high toxicity. Adsorption is currently the main method for removing micro-polluting organic matter, and it is also the method recommended by the US EPA for many types of micro-polluting organic matter. However, there are many kinds of these pollutants. Most of the existing adsorbents such as activated carbon have good effect on hydrophobic organic substances, but it is difficult to efficiently a...

Claims

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Application Information

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IPC IPC(8): C08F212/36C08F226/10C02F1/28C02F101/30
Inventor 周庆姚志建李爱民焦伟双陈冬
Owner NANJING UNIV
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