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Persimmon peel extractive, extraction method thereof and formaldehyde-removal coating containing persimmon peel extractive

An extraction method and technology of persimmon skin, applied in the field of formaldehyde-removing coatings, can solve environmental problems such as pollution, resource waste, etc., and achieve good antibacterial effect and the effect of inhibiting bacteria

Active Publication Date: 2012-01-04
中山市丽莎涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of drying persimmons into dried persimmons, a large amount of persimmon skins are produced. Studies have shown that the skins of persimmons contain a large amount of polyphenols, which have a good effect on removing odorous gases and formaldehyde. Use will be discarded, resulting in waste of resources and environmental pollution

Method used

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  • Persimmon peel extractive, extraction method thereof and formaldehyde-removal coating containing persimmon peel extractive
  • Persimmon peel extractive, extraction method thereof and formaldehyde-removal coating containing persimmon peel extractive
  • Persimmon peel extractive, extraction method thereof and formaldehyde-removal coating containing persimmon peel extractive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The extraction of embodiment 1 persimmon skin extract

[0082] Accurately weigh 100g of persimmon skin, dry the persimmon skin at 60°C for 10h, crush and sieve to obtain 92.8g of persimmon skin dry powder; Aqueous solution 1113.6mL was leached in a water bath at 45°C in the dark for 2h, filtered, and 989.4mL of the first filtrate was collected; 85.6g of filter residue was collected, and 513.6mL of acetone aqueous solution with a volume fraction of 50% was added at a mass volume ratio of 1:6, and extracted for 1h to obtain The second filtrate was 482.7mL; after the first filtrate and the second filtrate were mixed, the concentrated solution was obtained by distillation, and after freeze-drying, 79.5g of the persimmon skin extract was obtained, and the extraction rate of the persimmon skin extract was 79.5%.

Embodiment 2

[0083] The extraction of embodiment 2 persimmon skin extract

[0084] Accurately weigh 200g of persimmon skin, dry the persimmon skin at 60°C for 10h, crush and sieve to obtain 183.7g of persimmon skin dry powder; Aqueous solution 2204.4mL, leached in a water bath at 45°C in the dark for 2h, filtered, collected the first filtrate 2008.5mL; collected filter residue 173.1g, added 1038.6mL of acetone aqueous solution with a volume fraction of 50% according to the mass volume ratio of 1:6, extracted for 1h, obtained The second filtrate was 879.4 mL; after the first filtrate and the second filtrate were mixed, the concentrated solution was obtained by distillation, and after freeze-drying, 160.2 g of the persimmon skin extract was obtained, and the extraction rate of the persimmon skin extract was 80.1%.

Embodiment 3

[0085] Example 3 Persimmon skin extract deodorization, formaldehyde removal effect test

[0086] The persimmon skin extracts provided in Examples 1 and 2 were routinely identified, and the results showed that the persimmon skin extracts contained persimmon skin polyphenols, and the content of the persimmon skin polyphenols was 79.9-83.5%.

[0087] Weigh 10 g of the persimmon skin extract provided in Example 1 of the present invention to test the effects of deodorization and formaldehyde removal.

[0088] Determination of ammonia, trimethylamine, indole and formaldehyde: use headspace gas chromatography.

[0089] Test group: in the 100mL injection bottle pre-added with 10g of the persimmon skin extract provided in Example 1 of the present invention, respectively inject the water-saturated solution of ammonia, trimethylamine, indole, and formaldehyde, and after 12h, absorb the headspace gas of 1mL bottle Inject the sample to obtain the peak height of the test group;

[0090] Bla...

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Abstract

The invention relates to the field of fine chemical engineering, in particular to a persimmon peel extractive, an extraction method thereof and a formaldehyde-removal coating containing persimmon peel extractive. The persimmon peel extractive is characterized in that the persimmon peel is dried, smashed and screened to obtain the dry powder of the persimmon peel; and then, the dry powder of the persimmon peel is extracted by acetone to obtain the persimmon peel extractive. The coating comprises the persimmon peel extractive. The coating provided by the invention does not release formaldehyde and has low content of volatile organic compounds (VOC), and the quality conforms to the national standard. Experiments prove that the coating provided by the invention can be used for effectively inhibiting bacteria of which the bacteria inhibition rate is more than 99.99%, and formaldehyde strainaway rate is 93.16-95.97%. The interiro wall latex paint provided by the invention has the strainaway rate for VOC is 68.79-73.17%, wherein the strainaway rate for benzene is 63.14-73.06%, and thus the persimmon peel extractive can effectively and continuously remove formaldehyde in the air and other volatile organic compound airs (VOC).

Description

technical field [0001] The invention relates to the field of fine chemical industry, in particular to persimmon skin extract and its extraction method, and a formaldehyde-removing coating containing the persimmon skin extract. Background technique [0002] In recent years, with the development of my country's economy and the improvement of people's living standards, people's awareness of environmental protection and health requirements are increasing day by day, and the pollution caused by toxic and harmful substances in building decoration materials to the environment and the impact on human health have become increasingly prominent. Toxic and harmful substances mainly come from pollutants such as formaldehyde, ammonia, and benzene series released by building decoration materials. Among them, formaldehyde mainly comes from plywood, joinery board, paint, coating and other decorative materials used for interior decoration. It is a colorless and soluble irritating gas, which i...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D5/14C09D131/04C09D133/08C09D125/14
Inventor 宫献银孙球欧涛
Owner 中山市丽莎涂料有限公司
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