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HA (humic acid)/starch polymer and composite microsphere and preparation methods thereof

A technology of composite microspheres and humic acid, which is applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of high cost and achieve low production cost, strong adsorption performance, particle size controllable effect

Active Publication Date: 2019-05-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although heavy metals in water can be treated by redox method, chemical precipitation method, ion exchange method, membrane separation method or bioremediation, these methods are either costly or have certain technical defects.

Method used

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  • HA (humic acid)/starch polymer and composite microsphere and preparation methods thereof
  • HA (humic acid)/starch polymer and composite microsphere and preparation methods thereof
  • HA (humic acid)/starch polymer and composite microsphere and preparation methods thereof

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preparation example Construction

[0029] The invention discloses a preparation method of humic acid / starch composite microspheres. The specific preparation steps are:

[0030] 1) Weigh a certain quality of humic acid according to the mass ratio (humic acid: soluble starch is 5:5, 6:5, 7:5, 8:5, 9:5), stir and dissolve in 40% NaOH solution, Adjust the pH to 8-9 to prepare Solution A;

[0031] 2) According to the mass ratio of humic acid, weigh the corresponding mass of soluble starch, in 30mL of distilled water, heat and stir with solution A at 50°C to dissolve it into a homogeneous solution as the water phase, and prepare solution B;

[0032] 3) Add 0.2-0.6g of cross-linking agent N,N-methylenebisacrylamide and 0.4-0.8g of initiator potassium persulfate to solution B, keep cross-linking in a water bath at 40-70°C for 0.5-2h, and prepare Obtain solution C;

[0033] 4) Weigh 0.6-1.2g of Span-80, and weigh the corresponding mass of Tween-20 under the relative mass ratio (Span-80:Tween-20 is 3:1, 3:2, 1:1). Mix...

Embodiment 1

[0040] Weigh 1.5g of humic acid in a beaker, stir and dissolve in NaOH solution, adjust the pH to 8-9, and prepare solution A; weigh 1.5g of soluble starch according to the mass ratio of 5:5, and dissolve it in 30mL of distilled water , and solution A were heated and stirred in a three-necked flask at 50°C to dissolve it into a homogeneous solution as the water phase to prepare solution B; add 0.4 g of crosslinking agent N, N-methylenebispropylene Amide, 0.6g of initiator potassium persulfate, kept at 50°C for 1h in a water bath to prepare solution C; weighed 0.9g of Span-80, weighed 0.3g of Tween-20 at a relative ratio of 3:1, two Mix them together as an emulsifier, measure 80mL of liquid paraffin and dissolve it as an oil phase dispersant to prepare solution D; slowly add solution D dropwise into solution C, stir and emulsify at high speed for 0.5h, and then add 0.6g of trigger Add sodium bisulfite and continue the reaction for 4 hours; after the reaction, the product was al...

Embodiment 2

[0042] Weigh 1.8g of humic acid in a beaker, stir and dissolve in NaOH solution, adjust the pH to 8-9, and prepare solution A; weigh 1.5g of soluble starch according to the mass ratio of 6:5, and dissolve it in 30mL of distilled water , and solution A were heated and stirred in a three-necked flask at 50°C to dissolve it into a homogeneous solution as the water phase to prepare solution B; add 0.4 g of crosslinking agent N, N-methylenebispropylene Amide, 0.6g of initiator potassium persulfate, kept at 50°C for 1h in a water bath to prepare solution C; weighed 0.9g of Span-80, weighed 0.3g of Tween-20 at a relative ratio of 3:1, two Mix them together as an emulsifier, measure 80mL of liquid paraffin and dissolve it as an oil phase dispersant to prepare solution D; slowly add solution D dropwise into solution C, stir and emulsify at high speed for 0.5h, and then add 0.6g of trigger Add sodium bisulfite and continue the reaction for 4 hours; after the reaction, the product was al...

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Abstract

The invention discloses a novel HA (humic acid) / starch composite microsphere. HA is introduced into a starch microsphere, HA and soluble starch are taken as raw materials, MBAA (N,N-methylene bisacrylamide) is taken as a cross-linking agent, potassium peroxodisulfate / sodium hydrogen sulfite is taken as an initiator, Span-80 and Tween-20 in a certain mass ratio are taken as emulsifiers, liquid paraffin is selected as an oil-phase dispersing agent, and the HA / starch composite microsphere is prepared with an inverse emulsion polymerization synthesis method. The methods have the advantages that the raw materials are cheap and widely sourced, reaction conditions are mild, environmental friendliness is realized, and the operation method is simple.

Description

technical field [0001] The invention belongs to the technical field of functional polymers, and relates to a humic acid / starch polymer, composite microspheres and a preparation method thereof. Background technique [0002] The pollution caused by heavy metal wastewater is becoming more and more serious, which poses a huge potential threat to the ecological environment and human health. These wastewater must be strictly treated before they can be discharged. Although heavy metals in water can be treated by redox method, chemical precipitation method, ion exchange method, membrane separation method or bioremediation, these methods are either costly or have certain technical defects. Therefore, it is of great practical significance to develop cheap and efficient heavy metal adsorbents. [0003] Humic acid is a kind of coal-based materials, mainly macromolecular aromatic compounds, which contain oxygen-containing active functional groups such as carboxyl, hydroxyl, and carbonyl...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F289/00C08F222/38B01J20/24B01J20/28B01J20/30
Inventor 苏秀霞胡金龙张婧晏春苗徐佳张海宁霍文静贺生卓
Owner SHAANXI UNIV OF SCI & TECH
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