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Hydrophilic polymer microsphere and simple preparing method thereof

A hydrophilic polymer and polymer technology, applied in the direction of adsorption of water/sewage treatment, etc., can solve the problems of harsh conditions, low yield, cumbersome steps, etc., and achieve uniform particle size, high yield, and broad application prospects Effect

Active Publication Date: 2015-11-11
NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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Problems solved by technology

[0005] Aiming at the problems of cumbersome steps, harsh conditions and low yield in existing resin synthesis methods, the present invention provides a hydrophilic polymer microsphere and a simple preparation method thereof. The present invention mainly uses N-vinylpyrrolidone and divinylbenzene The monomer is polymerized under certain conditions to synthesize N-vinylpyrrolidone-divinylbenzene polymer, and the hydrophilicity and specific surface area of ​​the hydrophilic polymer microspheres are improved by increasing the amount of N-vinylpyrrolidone. The synthesized N-vinylpyrrolidone Pyrrolidone-divinylbenzene polymer microspheres are both hydrophilic and hydrophobic, and have a relatively balanced adsorption effect on various polar and non-polar compounds. At the same time, the adsorption capacity for hydrophilic substances is also much higher than other adsorption resin

Method used

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  • Hydrophilic polymer microsphere and simple preparing method thereof
  • Hydrophilic polymer microsphere and simple preparing method thereof
  • Hydrophilic polymer microsphere and simple preparing method thereof

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Embodiment 1

[0031] After mixing 10g of N-vinylpyrrolidone, 10g of divinylbenzene and 0.2g of azobisisobutyronitrile evenly, add it into a 500mL three-necked flask containing 100mL of anhydrous ethanol organic phase, control the stirring speed at 200rpm, and gradually Heating to 75° C., reacting for 3 hours, then filtering the obtained precipitate, washing with methanol three times, filtering, and washing with distilled water three times, and drying to recover polymer microspheres. The particle size of the obtained hydrophilic polymer microspheres is concentrated at 200nm, and the specific surface area is distributed at 23.8m 2 / g, the N content is 0.46%, the average pore size is 4.46nm, the scanning electron microscope picture is as figure 1 shown.

Embodiment 2

[0033] After mixing 25g of N-vinylpyrrolidone, 10g of divinylbenzene, 40g of toluene and 0.2g of azobisisobutyronitrile evenly, add them to a 500mL three-necked flask containing 100mL of anhydrous ethanol organic phase, control the stirring speed to 250rpm, and / 20min gradually heating up to 75°C, reacting for 4h, then filtering the obtained precipitate, washing with methanol for 5 times, filtering, and washing with distilled water for 3 times, and then drying to recover polymer microspheres. The particle size of the obtained hydrophilic polymer microspheres is concentrated at 400nm, and the specific surface area is distributed at 613m 2 / g, the N content is 1.4%, and the average pore diameter is 4.29nm. Under the condition of 35 DEG C, the adsorption capacity of the polymer spheres to the water-soluble tetracycline can reach 294.6 mg / g.

Embodiment 3

[0035] Mix 20g of N-vinylpyrrolidone, 10g of divinylbenzene and 0.2g of azobisisobutyronitrile evenly, add to 200mL of aqueous solution containing 13gNaCl and 1g of gelatin, control the stirring speed at 250rpm, and gradually heat at 5°C / 20min The temperature was raised to 85° C., reacted for 6 hours, and then the obtained precipitate was filtered, washed three times with methanol, filtered, washed three times with distilled water, and then dried to recover polymer microspheres. The particle size of the obtained hydrophilic polymer microspheres is concentrated at 60 μm, and the specific surface area is distributed at 520 m 2 / g, average pore diameter 6.69nm, scanning electron microscope picture as figure 2 shown.

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Abstract

The invention discloses a hydrophilic polymer microsphere and a simple preparing method thereof and belongs to the field of resin synthesis. The problems that according to an existing resin synthesis method, the steps are tedious, conditions are strict, and the yield is low are solved. According to the hydrophilic polymer microsphere, hydrophilic N-vinylpyrrolidone and oily divinylbenzene serve as main monomers, an N-vinylpyrrolidone-divinylbenzene polymer microsphere is synthesized in a polymerization mode under a certain condition; the hydrophilia of the polymer is obviously improved and the specific surface area is obviously increased by increasing the use amount of N-vinylpyrrolidone. The prepared hydrophilic polymer microsphere is uniform in grain size, a very high specific surface area is achieved, a very good adsorption effect on hydrophilic substances and oil substances is achieved, and the hydrophilic polymer microsphere can be used for purifying various environment water bodies, can also be used for enrichment, separation and analysis of water solubility organic pollutants in the water bodies and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of resin synthesis, in particular, it relates to a method for increasing the hydrophilicity and specific surface area of ​​a polymer by increasing the amount of N-vinylpyrrolidone used in the synthesis, more specifically, it relates to a micro-hydrophilic polymer Balls and their easy preparation. Background technique [0002] As a new type of organic adsorption material, resin polymer is widely used in the separation, purification and detection of bioengineering, drug synthesis and food processing. In recent years, various gels, macroporous styrene resins, and acrylic resins have played an important role in the treatment and recycling of wastewater. Most of these resins are polymerized from hydrophobic monomers, and have good adsorption properties for most hydrophobic substances in environmental water. In order to improve the adsorption and removal effect of hydrophilic substances in water, the development of new hy...

Claims

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Application Information

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IPC IPC(8): C08F226/10C08F212/36C02F1/28
Inventor 李爱民李强双陈冬周庆周伟伟王未
Owner NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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