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Nano Fe(OH)3 composite biological filler as well as preparation method and application thereof

A biofiller and nanocomposite technology, applied in the field of high activity, preparation, high stability microbial water treatment active carrier, nano-Fe3 composite biofiller, can solve the problem of difficult control of nanoparticle dispersion particle agglomeration, composite polyurethane material preparation steps It is cumbersome and difficult to guarantee the performance of nano-polyurethane materials, so as to avoid toxic effects, reduce the difficulty of preparation and stabilize the structure

Active Publication Date: 2014-07-30
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the separation of the preparation process of inorganic nanoparticles and the foaming process of polyurethane, not only the preparation steps of composite polyurethane materials are relatively cumbersome, but also the preparation cost of materials is increased. At the same time, it is difficult to control the dispersion of nanoparticles, Prevent particle agglomeration, making it difficult to guarantee the performance of nano polyurethane materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Prepare polyurethane prepolymer by reacting 2.4 parts of MDI, 1 part of 1,4-butanediol and 5 parts of acetone at 80°C for 2.5 hours by volume;

[0041] (2) 0.2 parts of isoamyl alcohol, 8 parts of cyclopentane, 0.1 part of 0.05mol / L FeCl by volume 3 The solution is mixed with 0.1 part of 0.2mol / L ammonia solution;

[0042] (3) Mix the above-mentioned 1 part of polyurethane prepolymer with the mixed solution obtained in step (2), first mix and react under ultrasonic vibration for 1.5 hours, then continue to react for 0.5 hours under mechanical stirring (stirring speed is lower than 10rpm), and then Concentrate the mixed solution by evaporation at a temperature of 60°C to obtain Fe(OH) 3 Nanocomposite polyurethane prepolymer;

[0043] (4) Mix 40 parts of MDI, 50 parts of ethylene glycol, 0.2 parts of dibutyl dilaurate and 1 part of Fe(OH) by volume 3 Nano-composite polyurethane prepolymer mixed to complete polyurethane foam to prepare nano-Fe(OH) 3 Composite biolo...

Embodiment 2

[0045] (1) 2.3 parts of MDI, 1 part of ethylene glycol and 5 parts of acetone were reacted at 85 ° C for 3.5 hours by volume to prepare a polyurethane prepolymer;

[0046] (2) 0.5 parts of n-butanol, 12 parts of cyclopentane, 0.1 part of 0.05mol / L FeCl by volume 3 The solution is mixed with 0.1 part of 0.2mol / L ammonia solution;

[0047] (3) Mix the above-mentioned 1 part of polyurethane prepolymer with the mixed solution obtained in step (2), first mix and react under ultrasonic vibration for 2 hours, then continue to react for 1 hour under mechanical stirring (stirring speed is lower than 10rpm), and then Concentrate the mixed solution by evaporation at a temperature of 75°C to obtain Fe(OH) 3 Nanocomposite polyurethane prepolymer;

[0048] (4) Mix 40 parts of TDI, 30 parts of ethylene glycol, 0.2 parts of dibutyl dilaurate and 1 part of Fe(OH) by volume 3 Nano-composite polyurethane prepolymer mixed to complete polyurethane foam to prepare nano-Fe(OH) 3 Composite biolog...

Embodiment 3

[0050] (1) Prepare polyurethane prepolymer by reacting 2.2 parts of MDI, 1 part of 1,4-butanediol and 5 parts of cyclopentanone at 80°C for 2.5 hours by volume;

[0051] (2) 0.5 parts of n-hexanol, 12 parts of cyclopentane, 0.1 part of 0.05mol / L FeCl by volume 3 The solution is mixed with 0.1 part of 0.2mol / L ammonia solution;

[0052] (3) Mix the above-mentioned 1 part of polyurethane prepolymer with the mixed solution obtained in step (1), first mix and react under ultrasonic vibration for 1.5 hours, then continue to react for 0.5 hours under mechanical stirring (stirring speed is lower than 10rpm), and then Concentrate the mixed solution by evaporation at a temperature of 60°C to obtain Fe(OH) 3 Nanocomposite polyurethane prepolymer;

[0053] (4) Mix 50 parts of MDI, 50 parts of ethylene glycol, 0.2 parts of dibutyl dilaurate and 1 part of Fe(OH) by volume 3 Nano-composite polyurethane prepolymer mixed to complete polyurethane foam to prepare nano-Fe(OH) 3 Composite bio...

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Abstract

The invention discloses a nano Fe(OH)3 composite biological filler as well as a preparation method and application thereof. The method is characterized by combining Fe(OH)3 nanoparticle preparation with the polyurethane (PU) foaming technique, firstly preparing a Fe(OH)3 nano PU prepolymer in situ and then completing foaming, thus avoiding the problem that Fe(OH)3 particles are easy to aggregate. The nano Fe(OH)3 composite biological filler and the preparation method have the beneficial effects that the prepared composite biological filler has large specific surface area and good biological load performance; Fe(OH)3 in the filler is uniformly dispersed, has a stable structure and can accelerate the metabolic activity of microorganisms, accelerate the biofilm formation of the microorganisms on the surface of the filler, simultaneously avoid the toxic effects of nanoparticles on the microorganisms due to small particle sizes, improve the skeleton strength of the PU foam filler and improve the stability and impact resistance of the filler; by adjusting the content of Fe(OH)3, the density of the prepared filler is convenient to control, thus ensuring the filler to be in a state of suspension in a wastewater treatment process and increasing the specific surface area of the filler.

Description

technical field [0001] The invention belongs to the technology in the field of waste water treatment, in particular to a nano-Fe(OH) 3 Composite biological filler, preparation method and application thereof, which is active carrier of microbial water treatment with high activity and high stability. Background technique [0002] Modern industrial wastewater has complex components and many types of pollutants, which are difficult to solve by conventional biological treatment technologies. By adding biological fillers in the process of wastewater treatment, increasing microbial activity and biodiversity, improving the metabolic activity and impact resistance of microorganisms is one of the important means of wastewater bioaugmentation treatment. [0003] Flexible polyurethane foam has been successfully used in the preparation of biological carriers and in wastewater treatment due to its convenient production, simple processing and molding, and stable performance. Due to the l...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08K3/22C08G18/48C08G18/32C08G18/10C02F3/34
Inventor 盛宇星曹宏斌李玉平
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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