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Black talc-polyvinyl formal gel composite adsorption material

A technology of polyvinyl formal and composite adsorption materials, which is applied in the direction of adsorption of water/sewage treatment, alkali metal compounds, alkali metal oxides/hydroxides, etc., and can solve the problems of fragility, poor recycling effect, chemical and mechanical Poor performance and other problems, to achieve the effect of easy control of reaction conditions, good adsorption, and simple preparation method

Active Publication Date: 2021-05-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the existing defects of polyvinyl acetal gel with poor chemical and mechanical properties, fragility, and poor recycling effect, the present invention provides a novel black talc-polyvinyl formal gel composite adsorption material and its Preparation method and application in dye adsorption, the purpose of the method of the present invention is to provide a kind of dry gel adsorbent with natural mineral material adsorbent, high adsorption, easy recovery, high stability

Method used

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  • Black talc-polyvinyl formal gel composite adsorption material
  • Black talc-polyvinyl formal gel composite adsorption material
  • Black talc-polyvinyl formal gel composite adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0028](1) 2.0 g of PVA was added to 100 ml of three-necked flask, then 18 g of water, stirred at 95 ° C in an oil bath pan and dissolved with 10% by weight of PVA aqueous solution. Then 0.5 g of black slot powder, stirred for 1 h, forming a black slide / PVA homogeneous emulsion. Cooling to 72 ° C.

[0029](2) Weigh 0.1 g of hexane and 1.0 g sodium bicarbonate in 10 ml of centrifuge tube, and 3 ml of water shake evenly foamed. The foaming solution was added to a black slide / PVA homogeneous emulsion to 72 ° C and stirred into a mixed solution to dissolve sodium hydrogencarbonate, and the emulsion volume was expanded from the original 18 ml expanded to 36 ml. The mixture was stirred until 40 ° C after stirring for 5 min.

[0030](3) 2 ml of formaldehyde was added when the temperature was reduced to 40 ° C, and the crosslinking reaction was 20 min. The hydrogel was poured into the mold at 60 ° C for 12h, take out, reversely bubble, extruded, remove unreacted monomers, wash to neutral. The ...

Embodiment 2

[0032](1) 2.0 g of PVA was added to 100 ml of three-necked flask, then 18 g of water, stirred at 95 ° C in an oil bath pan and dissolved with 10% by weight of PVA aqueous solution. Then 1.0 g of black slipstone powder was added, stirred for 1.5 h, and a black slide / PVA homogeneous emulsion was formed. Cooling to 72 ° C.

[0033](2) It is weighing 0.15 g of hexane and 1.2 g sodium bicarbonate in a 10 ml centrifuge tube, and 3 ml of water shaking is evenly bubble. The foaming solution was added to a black slot / PVA homogeneous emulsion to 72 ° C and stirred into a mixed solution to dissolve sodium hydrogencarbonate, and the emulsion volume was expanded from the original 22 mL expanded to 40 ml. Stirring was stirred for 5 min and then cooled to room temperature.

[0034](3) The reaction was added to 2 ml of formaldehyde for 20 min when the temperature was lowered to room temperature. The hydrogel was poured into the mold at 60 ° C for 12h, take out, reversely bubble, extruded, remove unre...

Embodiment 3

[0036](1) 2.0 g of PVA was added to the three-neck flask, then 18 g of water was added, stirred at 95 ° C in an oil bath pan and dissolved with 10% by weight of the PVA aqueous solution. Then 1.5 g of black slipstone powder was added, stirred for 2 h, forming a black slide / PVA homogeneous emulsion. Cooling to 72 ° C.

[0037](2) Weigh 0.15 g of hexane and 1.5 g sodium bicarbonate in 10 ml of centrifuge tube, and 3 ml of water shake evenly foamed. The foaming solution was added to the black slide / PVA homogeneous emulsion to 72 ° C, stirred to dissolve sodium hydrogencarbonate in the mixed solution, and the emulsion volume was expanded from the original 25 mL expanded to 55 ml. Continue to stir after 5 minutes to cool down to room temperature

[0038](3) 2 ml of formaldehyde was added to 30 min at a temperature dropped to room temperature. The hydrogel was poured into the mold at 60 ° C for 12h, take out, reversely bubble, extruded, remove unreacted monomers, wash to neutral. The compos...

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Abstract

The invention discloses a black talc-polyvinyl formal gel composite adsorption material and a preparation method thereof, belonging to the technical field of dye adsorption and preparation. The preparation method specifically comprises the following steps: dissolving polyvinyl alcohol, then adding a hexane / sodium bicarbonate mixed solution, conducting stirring and foaming, then adding black talcum powder with a particle size of about 300 nm, conducting full stirring and uniform mixing, then adding formaldehyde for a reaction and crosslinking to prepare a hydrogel composite material, and finally, conducting curing and forming in a drying oven to obtain the black talc-polyvinyl formal gel composite adsorption material. The black talc-polyvinyl formal composite gel provided by the invention not only can fix / adsorb dyes, but also has excellent water absorption, swelling and compression properties, and overcomes the technical problem that an adsorbent is difficult to recover in the prior art; and the method is simple and easy to operate, and has wide application prospects.

Description

Technical field[0001]The present invention belongs to the field of dye wastewater treatment, and therefore specifically involves a black sliding stone-polyvinyl hydrochromic gel composite adsorption material and the preparation method thereof.Background technique[0002]Water pollution is an important environmental issue of global concerns. Research on water pollution, especially dye wastewater, has caused extensive attention because it will affect aquatic organisms and humans. Due to poisonous dyes, non-biodegradable or even cancer effects, once they are discharged into the water, the balance of the ecological environment will cause serious threats. Therefore, removing dye wastewater is critical to prevent environmental pollution.[0003]As a talc, the black slide is a 2: 1 (TOT type) layered structure, two silicon oxide (T) and a magnesium oxide-octahedron (O), talc single layer TOT layer It is 9.4A, the thickness of the interlayer is about 0.1a, also called Tot type clay mineral. Tal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/26B01J20/30C02F1/28C02F101/30
CPCB01J20/28047B01J20/267B01J20/10B01J20/28011C02F1/285C02F1/281C02F2101/308
Inventor 张国亮何蓝天李雄孟琴
Owner ZHEJIANG UNIV OF TECH
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