Starch-based polyacrylic acid magnetic adsorption material as well as preparation method and application thereof

A magnetic adsorption material, polyacrylic acid technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of difficult recovery of adsorbents, high cost, low cost, enhanced adhesion, The effect of improving adsorption capacity

Active Publication Date: 2021-09-28
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, most of the methods for dealing with organic pigment molecules are physical adsorption method, membrane filtration method, magnetic separation method, chemical coagulation method, electrochemical method, advanced oxidation method, microbial treatment method, aerobic method, anaerobic method, aerobic- Anaerobic joint treatment process, etc., but they all have the disadvantages of high cost and difficult recovery of adsorbent

Method used

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  • Starch-based polyacrylic acid magnetic adsorption material as well as preparation method and application thereof
  • Starch-based polyacrylic acid magnetic adsorption material as well as preparation method and application thereof
  • Starch-based polyacrylic acid magnetic adsorption material as well as preparation method and application thereof

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preparation example Construction

[0027] The invention provides a Fe 3 o 4 - The preparation method of the R@PAA@Starch adsorption material is implemented according to the following steps:

[0028] Step 1. Preparation of Fe by co-precipitation method 3 o 4 Magnetic micro-nanoparticles, the FeCl 3 ·6H 2 O, FeSO 4 ·7H 2 O and NaOH solutions are added to the flask in turn, and the reaction is continuously stirred at 60°C to 130°C for 2 to 12 hours to form Fe 3 o 4 Magnetic micro-nano particles, according to the mass ratio 1: (0.05~0.1) Fe 3 o 4 Dissolve magnetic micro-nano particles in ethanol aqueous solution with a mass fraction of 75%, then add modified substances and mix them, condense and reflux at 60°C to 110°C for 2 hours, then stop the reflux, and the black substance produced in the flask is the modified Fe 3 o 4 micronanoparticles; where FeSO 4 ·7H 2 O, FeCl 3 ·6H 2 The molar ratio of O and NaOH solution is 1:(1~5):(4~10), Fe 3 o 4 The molar ratio of the magnetic micro-nano particles to...

Embodiment 1

[0050] (1) 0.022mol of FeCl 3 ·6H 2 O, 0.022mol-FeSO 4 ·7H 2 O and 0.088mol 0.044mol NaOH were dissolved in 50mL aqueous solution, added to the flask in turn, equipped with a mechanical stirrer and a thermometer, and continuously stirred at 60°C for 2 hours to generate Fe 3 o 4 magnetic micronanoparticles. Then, 1g Fe 3 o 4 Dissolve the magnetic micro-nano particles in 50mL of 75% ethanol aqueous solution, then add 0.0035mol oleic acid for ultrasonication for 5min, condense and reflux at 75°C, wash and centrifuge repeatedly with deionized water, dry and grind into powder at 80°C to obtain modification Fe after 3 o 4 micronanoparticles.

[0051] (2) Put 0.2g of tapioca starch, 4g of tetrahydrofuran, 2g of acrylic acid, 0.176g of divinylbenzene, and 0.07g of azobisisobutyronitrile as initiators into Into the flask, pass nitrogen gas for 20 minutes, equipped with a mechanical stirrer and a thermometer, and continuously stir and react at 45°C for 1 hour to form a starch ...

Embodiment 2

[0056] (1) 0.11molFeCl 3 ·6H 2 O, 0.022molFeSO 4 ·7H 2 O and 0.22mol NaOH were dissolved in 50mL aqueous solution, and added to the flask in turn, equipped with a mechanical stirrer and a thermometer, and continuously stirred at 130°C to react 12 to generate Fe 3 o 4 magnetic micronanoparticles. Then, 1g Fe 3 o 4 Magnetic micro-nanoparticles were dissolved in 100mL of 75% ethanol aqueous solution, 0.07mol of pentaerythritol oleate was added and ultrasonicated for 5 minutes, condensed and refluxed at 75°C, washed and centrifuged repeatedly with deionized water, dried and ground into powder at 80°C to obtain improved Sexual Fe 3 o 4 micronanoparticles

[0057] (2) 0.2g of sweet potato starch pretreated by 200mL of 0.2mol / L sodium carbonate solution, 12g of tetrahydrofuran, 6g of glycidyl methacrylate, 0.62g of divinylbenzene, and 0.341g of azobisisobutyronitrile Put it into a flask as an initiator, feed nitrogen gas for 20 minutes, equip with a mechanical stirrer and a...

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Abstract

The invention discloses a starch-based polyacrylic acid magnetic adsorption material and a preparation method and application thereof. The preparation method comprises the following steps: preparing Fe3O4 magnetic micro-nano particles through a coprecipitation method, and modifying the Fe3O4 magnetic micro-nano particles to obtain modified Fe3O4 micro-nano particles; mixing a pretreated starch base material, an acrylic monomer, tetrahydrofuran, an initiator and divinyl benzene, and conducting reacting under a vacuum condition to obtain a starch base material; and mixing the modified Fe3O4 micro-nano particles, the starch base material and polyacrylic acid for reaction to obtain the starch-based polyacrylic acid magnetic adsorption material. The preparation method is simple in process; used reagents are common drugs which can be purchased on the market, so cost is low, and operability is high; the starch raw material adopted in the preparation process is pollution-free to the environment and easy to obtain, and polymerization conditions are simple; the adopted magnetic particles are beneficial to subsequent recovery, and secondary pollution is not prone to being generated; and preparation conditions are convenient, economic benefits are produced, and production on a large scale can be realized.

Description

technical field [0001] The invention belongs to the technical field of polymer adsorption materials, in particular to a starch-based polyacrylic acid magnetic adsorption material and its preparation method and application. Background technique [0002] With the development of industrialization, organic pigments, as important fine chemical products, are widely used in chemical, textile and other industrial fields. Printing wastewater contains a large number of organic pigment molecules mainly composed of azo pigments. The wastewater has complex components, high chroma, high toxicity, and a large pH span. It is highly toxic organic wastewater that is difficult to biodegrade. It is a great threat, and it will also cause a lot of harm to human health. Under the mainstream trend of rapid development of green printing, solving the pollution problem of printing wastewater has become a top priority. [0003] At present, most of the methods for dealing with organic pigment molecule...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/261B01J20/24B01J20/06B01J20/28009C02F1/288C02F2101/308
Inventor 侯成敏严薇刘甜钱志云杨佳琦张杰张兴
Owner XIAN UNIV OF TECH
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