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Surface grafting polar monomer modified polystyrene macroporous resin and preparation method thereof

A polystyrene type, polar monomer technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of low grafting rate, a large number of processing restrictions, etc., achieve simple reaction steps, improve surface properties, The effect of overcoming pore blockage

Inactive Publication Date: 2011-11-02
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The radiation grafting method is carried out at room temperature, with good repeatability and high grafting efficiency, but it depends on the radiation source, and a large amount of processing is limited; the advantage of ATRP grafting is that the synthesized copolymer has a clear structure and the graft chain length is controllable. It is necessary to introduce a halogen atom group on the surface of the main chain that can be used as a grafting initiator; chemical grafting is to use the reactive groups on the surface of the material to chemically react with the grafted monomer or macromolecular chain to achieve surface grafting. , the reaction conditions are easy to control, but the grafting rate is not high

Method used

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  • Surface grafting polar monomer modified polystyrene macroporous resin and preparation method thereof
  • Surface grafting polar monomer modified polystyrene macroporous resin and preparation method thereof
  • Surface grafting polar monomer modified polystyrene macroporous resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Add 800 g of deionized water and 8.0 g of gelatin to a 2000 mL three-necked flask equipped with a stirrer, a reflux condenser, and a thermometer, soak overnight, heat the water bath to 45°C the next day, and prepare the pre-prepared oil phase (monomer Industrial divinylbenzene 100g content is 55%, mixed with 125ml porogen toluene, initiator BPO 1.0g) add, adjust the stirring speed, after the organic phase is dispersed into oil droplets with appropriate particle size, the temperature is raised at 1°C / 2min Slowly raise the temperature to 78°C for 2 hours, then raise the temperature to 85°C for 3 hours, then raise the temperature to 90°C for 6 hours, then stop the reaction. Filter out the resin with a gauze bag while it is hot, wash the resin with a large amount of hot water until the water is clear, wash with acetone, extract with acetone in a Soxhlet extractor for 8 hours, dry it in vacuum at 60°C, and sieve for 30-60 Mesh pellets are ready for use.

[0040] In a 100ml ...

Embodiment 2

[0042] According to the same method of embodiment 1, the grafting monomer is hydroxyethyl methacrylate. A modified resin containing a hydroxyl group and an ester group on the surface is obtained.

Embodiment 3

[0044] According to the same method as in Example 1, the grafted monomer is glycidyl methacrylate to obtain a grafted resin, which is swollen with 5 volumes of tetrahydrofuran for 1 hour, then added with 1M sulfuric acid aqueous solution, stirred and reacted at 50°C for 2 hours, filtered The resin is discharged, and the water is repeatedly washed until the effluent water is neutral to obtain a modified resin containing dihydroxy and ester groups.

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Abstract

The invention relates to surface grafting polar monomer modified polystyrene macroporous resin and a preparation method thereof. The preparation method is characterized by comprising the steps of: synthesizing a high-swelling resin mother bulb by industrial divinylbenzene through suspension polymerization, and then carrying out modification by utilizing the suspended double bond of the resin mother bulb in a mode of grafting a polar monomer with a chemical method; wherein the polar monomer is one of the monomers of methyl methacrylate (MMA), hydroxyethyl methacrylate (HEMA) or glycidyl methacrylate (GMA); and the surface of the obtained modified resin contains ester, hydroxyl and ester, or dihydroxyl and ester. After the modified resin is dried, the polar group content of the surface is 10-20 percent, the specific surface area is 300-700 m<2> / g, and for the water-holding capacity, the ester group resin, the hydroxyl and ester resin, and the dihydroxyl and ester resin are respectively 6.6 percent, 10.8 percent and 21.8 percent. The surface grafting modified resin can be used as a solid phase extracting agent for extracting organic substances, such as phenols, arylamine and the like in water.

Description

【Technical field】 [0001] The invention relates to a class of surface graft modified polystyrene type macroporous resin and a preparation method thereof. In particular, it relates to a method for chemically grafting polar monomers to modify surface hydrophobic polystyrene resins. The invention belongs to the technical field of manufacturing polymer adsorption and separation materials. 【Background technique】 [0002] Polystyrene type macroporous adsorption resin has been widely used in actual production as an adsorbent. However, due to its strong hydrophobicity, it has some defects in some adsorption applications, such as the adsorption of highly polar samples in water samples, and the separation application in biochemical medicine; in order to expand its application range, it needs to be modified. Commonly used methods mainly contain: the copolymerization modification with polar monomer (Liu Yongning, Shi Zuoqing, Shi Rongfu, Fan Yunge, He Binglin, the structure and perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F257/00C08F112/36C08F8/12C08J9/04B01J20/26B01J20/30
Inventor 范云鸽施荣富温青袁荣华
Owner NANKAI UNIV
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