Tannin microsphere slow release type formaldehyde capture agent based on chitosan and preparation method thereof

A technology of formaldehyde scavenger and chitosan, which is applied in the field of formaldehyde scavenger, can solve the problems of formaldehyde degradation effect and poor controlled release effect, and achieve microbial degradability, stable microcapsule structure and high coating rate Effect

Active Publication Date: 2019-04-12
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the present invention aims to solve the technical problems in the prior art that the microcapsule structure core material of the formaldehyde absorbing material has poor controlled release effect and the formaldehyde degradation effect needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The embodiment of the present invention provides a preparation method of chitosan-based tannin microsphere slow-release formaldehyde scavenger, comprising steps:

[0036] S101, dissolving chitosan in an acetic acid solution with a volume percentage concentration of 1.9-2.1%, stirring at room temperature until the solution is clear and transparent, to obtain a solution A.

[0037] The configuration ratio of chitosan and acetic acid is that 1 mg of chitosan corresponds to 2-3 ml of acetic acid solution.

[0038] S102, taking tannin and dissolving it in distilled water, stirring at room temperature until the solution is clear and transparent to obtain a B solution.

[0039] The ratio of tannin to distilled water is 1mg of tannin corresponds to 2-3ml of distilled water.

[0040] S103, mixing the A solution and the B solution together to form a suspension, and magnetically stirring at room temperature to make the distribution uniform, to obtain an aqueous phase solution.

...

Embodiment 2

[0047] Embodiment 2 of the present invention is another embodiment of the preparation method of chitosan-based tannin microsphere slow-release formaldehyde scavenger, this embodiment comprises steps:

[0048] S201, dissolving chitosan in an acetic acid solution with a concentration of 2% by volume, and stirring at room temperature until the solution is clear and transparent, to obtain a solution A.

[0049] The configuration ratio of chitosan and acetic acid is that 1 mg of chitosan corresponds to 2 ml of acetic acid solution.

[0050] S202, taking tannin and dissolving it in distilled water, stirring at room temperature until the solution is clear and transparent to obtain a B solution.

[0051] The ratio of tannin to distilled water is 1mg of tannin corresponds to 2ml of distilled water.

[0052]S203, mixing the A solution and the B solution together to form a suspension, stirring with magnetic force at room temperature to make the distribution uniform, and obtaining an aqu...

Embodiment 3

[0060] Embodiment 3 of the present invention is another embodiment of the preparation method of chitosan-based tannin microsphere slow-release formaldehyde scavenger, this embodiment comprises steps:

[0061] S301, dissolving chitosan in an acetic acid solution with a concentration of 2% by volume, stirring at room temperature until the solution is clear and transparent, to obtain a solution A.

[0062] The configuration ratio of chitosan and acetic acid is that 1 mg of chitosan corresponds to 3 ml of acetic acid solution.

[0063] S302, taking tannin and dissolving it in distilled water, stirring at room temperature until the solution is clear and transparent to obtain a B solution.

[0064] The ratio of tannin to distilled water is 1mg of tannin corresponds to 3ml of distilled water.

[0065] S303, mixing the A solution and the B solution together to form a suspension, and magnetic stirring at room temperature to make the distribution even, to obtain an aqueous phase soluti...

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Abstract

The invention provides a tannin microsphere slow release formaldehyde capture agent and a preparation method thereof. The method comprises the following steps of: dissolving chitosan in an acetic acidsolution, stirring at room temperature until the solution is clear and transparent, and dissolving tannin in distilled water, stirring at room temperature until the solution is clear and transparent;mixing the two to form a suspension to obtain a water phase solution; preparing an oil phase solution; mixing the water phase solution and the oil phase solution, stirring at 800-1400 rpm and 40-60 DEG C for 180-300 min to form emulsion, and cooling to room temperature; washing the precipitate by using acetone and finally placing the product in a drying oven and drying the product into powder. The formaldehyde capture agent has the advantages of good microcapsule structure stability, high tannin coating rate and capability of releasing tannin to capture formaldehyde for a long time.

Description

technical field [0001] The invention relates to the technical field of formaldehyde scavenger, in particular to a chitosan-based tannin microsphere slow-release formaldehyde scavenger and a preparation method thereof. Background technique [0002] Microcapsules are micro-containers or packages with polymer walls. Generally, natural or chemically synthesized polymer materials are used as wall materials to embed and seal tiny particles of solid, liquid or gas in semi-permeable or sealed capsule walls. Inside. The substances in the microcapsules are isolated from the external environment and can be kept stable from the influence of the environment. Under appropriate conditions, the encapsulated substances can be released again, and the controlled release effect can be achieved through appropriate means. Due to the characteristics of the microcapsule structure, the application of microcapsule technology to remove formaldehyde has a broad application prospect, and it is one of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/24B01J20/28B01D53/02
CPCB01D53/02B01J20/24B01J20/28021B01D2258/02B01D2257/708
Inventor 程进朱晓冬李棒棒胡润生王顺新郭云辉刘玉王巍聪
Owner NORTHEAST FORESTRY UNIVERSITY
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