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Manganese oxide/polymer micro-capsule composite submicron fibrous membrane and preparation method thereof

A polymer and manganese oxide technology, applied in the direction of chemical instruments and methods, chemical/physical processes, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of difficult uniform dispersion of manganese oxide nanoparticles and difficult catalytic oxidation Improvement, small porosity of catalyst materials, etc., to achieve the effect of increasing contact area, increasing catalytic oxidation performance, and mild reaction conditions

Pending Publication Date: 2020-12-25
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is that it is difficult to disperse the manganese oxide nanoparticles uniformly, the catalyst material has a small porosity, a small specific surface area, cannot fully contact with the air, and it is difficult to improve the catalytic oxidation performance. Problems such as low removal ability of trace formaldehyde and VOCs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Take 50mL of absolute ethanol and 1.1mL of ultrapure water, add it to a 100mL round bottom flask, add a magnet, fix it on a magnetic stirrer and start stirring (460r / min). During the stirring process, take 1.3mL concentrated ammonia water and quickly add it to the round bottom flask. After stirring for 20 min, 1.1 mL of LTEOS was added. After reacting for 5 h, 0.1 mLAPTES was added. After continuing to react for 12 hours, centrifuge and wash with ethanol 4 times (11000r / min, 15min), then centrifuge and wash 2 times with acetonitrile (11000r / min, 15min), pour off the supernatant, and weigh the product. Disperse the product in 30mL acetonitrile solvent to obtain 70nm amino-modified SiO 2 Microspheres; 70nm amino-modified SiO obtained by taking 1mL 2 Add microspheres into 25mL acetonitrile, disperse evenly by ultrasonic, add 10μL AA, 0.5mLDVB, 0.04gAIBN, use distillation precipitation polymerization method, control boiling within 15min, continue to heat until 25mL of...

Embodiment 2

[0028] 1) step 1) is the same as embodiment 1;

[0029]2) The manganese oxide / polymer microcapsule obtained in the step 1) of taking 2wt% of the PVB mass fraction is ultrasonically dispersed in 1mL propyl formate, and the weighing mass fraction is 10% PVB and 1.3% [ HP y ][PF 6 ], ultrasonically dispersed into 1mL propyl formate, fully mixed the two solutions, fully stirred until completely dissolved, and ultrasonicated the spinning solution for 6min. Set the spinning voltage to 10KV, the injection speed to 0.09mm / min, the receiving distance to 15cm, no humidity, and the temperature to about 25°C for spinning to obtain the manganese oxide / polymer microcapsule composite submicron fiber membrane.

Embodiment 3

[0031] 1) step 1) is the same as embodiment 1;

[0032] 2) The manganese oxide / polymer microcapsule obtained in the step 1) of taking 5wt% of the PVB mass fraction is ultrasonically dispersed in 1mL propyl formate, and the weighing mass fraction is 11% of PVB and 1.2% of [ HP y ][PF 6 ], ultrasonically dispersed into 1mL propyl formate, fully mixed the two solutions, fully stirred until completely dissolved, and ultrasonicated the spinning solution for 6min. Set the spinning voltage to 11KV, injection speed to 0.1mm / min, receiving distance to 18cm, no humidity, and temperature at about 25°C to spin to obtain manganese oxide / polymer microcapsule composite submicron fiber membrane.

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Abstract

The invention discloses a manganese oxide / polymer microcapsule composite submicron fiber membrane and a preparation method thereof, and belongs to the technical field of transition metal oxide composite materials. The preparation method mainly comprises the following steps: by taking amino-modified SiO2 microspheres as a template, divinyl benzene as a cross-linking agent and acrylic acid as a functional monomer, preparing core-shell composite microspheres by virtue of a distillation precipitation polymerization method, removing the SiO2 template by etching to obtain polymer microcapsules (APC), and then loading manganese oxide onto the APC by virtue of an in-situ reduction method, thereby obtaining the core-shell composite microspheres. Finally, the manganese oxide / polymer microcapsules (MnOx / APC) and polyvinyl butyral (PVB) are prepared into a spinning solution together, and the manganese oxide / polymer microcapsule composite submicron fiber membrane is prepared through an electrostatic spinning method. The fiber membrane material synthesized by the method has the characteristics of small pore diameter, high porosity, large specific surface area, good fiber uniformity and large contact area with air, and has good removal capability on trace formaldehyde and volatile organic compounds (VOCs) in air.

Description

technical field [0001] The invention relates to the technical field of transition metal oxide composite materials, in particular to a manganese oxide / polymer microcapsule composite submicron fiber membrane and a preparation method thereof. Background technique [0002] Manganese oxide (MnO x ) as a transition metal oxide, which is rich in resources, cheap and easy to obtain, and manganese oxide nanoparticles have catalytic oxidation properties, and have a good purification ability for trace amounts of formaldehyde and volatile organic compounds (VOCs) in the air [Tian Hua. Research progress of manganese oxide catalyzed oxidation of formaldehyde [J]. Chemical Bulletin, 2013, 76(02): 100-106.]. Therefore, it has been widely concerned by people. [0003] However, due to the high surface energy of nano-manganese oxide, it is easy to aggregate and it is difficult to improve the catalytic oxidation activity, so people generally regard MnO x Loaded on the carrier to obtain evenl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J35/06B01J35/10B01D53/86B01D53/72B01D53/44D04H1/728
CPCB01J31/06B01D53/8687B01D53/8668D04H1/728B01D2258/06B01D2257/708B01J2231/70B01J35/59B01J35/61
Inventor 刘巍廖伟龙罗宁张静雯
Owner TIANJIN POLYTECHNIC UNIV
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