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Fiber/nano manganese dioxide composite material and preparation method and application thereof

A technology of nano-manganese dioxide and composite materials, applied in the field of organic-inorganic composite materials, which can solve the problems of difficult regeneration of adsorbents and the influence of adsorption capacity, and achieve the effects of wide range of reaction conditions, simple use conditions and enhanced effect

Active Publication Date: 2018-06-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption method mainly uses activated carbon, but it only transfers the formaldehyde in the air to the adsorbent without eliminating it, and the regeneration of the adsorbent is difficult, and the water vapor in the air has a great influence on its adsorption capacity. The photocatalytic oxidation method can only It is carried out under the condition of light, and the heterogeneous catalytic oxidation method has always been the focus of formaldehyde removal research because of its high catalytic efficiency and the advantages of no additional conditions in use.

Method used

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  • Fiber/nano manganese dioxide composite material and preparation method and application thereof
  • Fiber/nano manganese dioxide composite material and preparation method and application thereof
  • Fiber/nano manganese dioxide composite material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0031] A preparation method for purifying formaldehyde fiber material, specifically comprising the steps of:

[0032] (1) Pretreated fiber

[0033] Select the TEMPO / NaClO / NaBr system to selectively oxidize the bleached eucalyptus chemical pulp fiber, wash until neutral, and obtain the oxidized fiber;

[0034] (2) Preparation of purified formaldehyde fiber material

[0035] The above-mentioned oxidized fibers were subjected to 0.1mol / L H 2 SO 4 Wash to neutral after soaking for 1h, in 0.05mol / L MnCl 2 After stirring the solution for 1 h, KMnO was added 4 solution, KMnO 4 with MnCl 2 The molar ratio is 1.5:1, the fiber concentration is 1wt%, the stirring rate is 800rpm, the reaction temperature is 50°C, and the reaction time is 20min. Growth of nano-manganese dioxide fibers.

[0036] The scanning electron microscope picture of the obtained fiber / nano-manganese dioxide composite material is as follows: figure 1 shown by figure 1 The nano-manganese dioxide grown in situ ...

Embodiment 2

[0040] A preparation method for purifying formaldehyde fiber material, specifically comprising the steps of:

[0041] (1) Pretreated fiber

[0042] Use laccase / TEMPO / O 2 The system selectively oxidizes the bleached poplar chemical pulp fibers and washes them to neutral to obtain oxidized fibers;

[0043] (2) Preparation of purified formaldehyde fiber material

[0044] The above-mentioned oxidized fibers were soaked in 0.3mol / L HCl for 1h and then washed to neutrality. In 0.1mol / L MnSO 4 After stirring the solution for 3 h, K was added 2 FeO 4 , K 2 FeO 4 with MnSO 4 The molar ratio is 1:1, the fiber concentration is 2wt%, the stirring rate is 1000rpm, the reaction temperature is 30°C, and the reaction time is 30min. After the reaction, wash with deionized water until the washing liquid has no color change, and dry at 80°C for 8h , to obtain in-situ growth nano manganese dioxide fibers.

[0045] The scanning electron microscope picture of the obtained fiber / nano-mangan...

Embodiment 3

[0047] A fiber material for purifying formaldehyde and a preparation method thereof, specifically comprising the steps of:

[0048] (1) Pretreated fiber

[0049] Select TCCA / NHPI / anthraquinone / NaBr system to selectively oxidize tencel fibers, wash to neutral, and obtain oxidized fibers;

[0050] (2) Preparation of purified formaldehyde fiber material

[0051] The above-mentioned oxidized fibers were subjected to 0.05mol / L HNO 3 After soaking for 24 hours, wash to neutral, at 0.005mol / L (CH 3 COO) 2 After stirring the Mn solution for 5 h, adding H 2 o 2 , H 2 o 2 with (CH 3 COO) 2 The molar ratio of Mn is 3:1, the fiber concentration is 5wt%, the stirring rate is 200rpm, the reaction temperature is 10°C, and the reaction time is 240min. Fibers grown from nano-manganese dioxide.

[0052] After the reaction, a fiber / nano manganese dioxide composite material is obtained, and the nano manganese dioxide particles are spherical, uniformly and densely distributed on the sur...

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Abstract

The invention discloses a fiber / nano manganese dioxide composite material and a preparation method and an application thereof. The method comprises the following steps: 1) pretreatment of a fibrous raw material: performing selective oxidation treatment on the fibrous raw material, and washing the fibrous raw material to a neutral state to obtain oxidized fibre; and 2) preparation of the compositematerial: processed the oxidized fiber through dilute acid treatment and washing the material to the neutral state, mixing the material and a Mn2+solution and uniformly stirring the materials, addingan oxidizing agent and reacting the materials, washing the material, and drying the product to obtain the fiber for in-situ growth of nano manganese dioxide. The particle size scope distribution of the nano manganese dioxide particles is narrow, the distribution of the nano manganese dioxide particles on the surface of the fiber is uniform, shedding is difficulty happened, and the obtained producthas the excellent performance of fiber and nano manganese dioxide, can be processed as a wood functional material having decorative performance and functional performance, can perform catalytic purification of formaldehyde in a room without illumination, and enriches an application field of nano manganese dioxide.

Description

technical field [0001] The invention belongs to the field of organic-inorganic composite materials, and relates to a method for growing nano manganese dioxide in situ on fiber, and the obtained fiber / nano manganese dioxide composite material is used to catalyze and purify formaldehyde. Background technique [0002] Formaldehyde is a colorless gas with a strong pungent smell and high toxicity. It will cause great damage to the human body's sense of smell, lungs, liver and immune function. Formaldehyde can also combine with amino groups in proteins to produce cell mutation, it has been defined by the World Health Organization as carcinogenic and teratogenic substances. Indoor formaldehyde mainly comes from decorative materials, plywood, fiberboard, particle board and other artificial products. These artificial products are mostly made of urea-formaldehyde resin as adhesive and commonly used for anti-corrosion treatment with formaldehyde. Therefore, free formaldehyde is often r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J37/12B01D53/86B01D53/72
CPCB01D53/8668B01J31/069B01J37/12
Inventor 李海龙公昊刘梦茹
Owner SOUTH CHINA UNIV OF TECH
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