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Method for preparing bacteriostatic textile finishing agent from ursolic acid extract

A technology of ursolic acid and extracts, which is applied in the field of preparation of antibacterial textile finishing agents, can solve the problems of reducing extraction time, long time required, and large amount of solvent, and achieves easy-to-obtain raw materials, slow sedimentation speed, and Brownian motion The effect of small displacement

Active Publication Date: 2019-11-26
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional immersion method, heating method, reflux method and other methods for extracting ursolic acid have a large amount of solvent and take a long time, while the microwave extraction method can reduce the extraction time and have a high yield, mainly destroying the cell wall to extract biologically active substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]1) Raw material pretreatment: heather leaves are placed in a drying oven at 40° C., dried and pulverized, and passed through a 50-mesh sieve to obtain dry heather leaf powder for use.

[0030] 2) Extractant preparation: 10.2g (NH 4 ) 2 SO 4 Dissolve in 20.8mL of deionized water, add 19.2mL of ethanol, and stir for 5min with a stirrer. When the two phases are separated, a concentration of 32% ethanol (w / w) and 22% (NH 4 ) 2 SO4 concentration (w / w) of the extractant.

[0031] 3) Extract after mixing heather leaf powder and extractant: Weigh 1 g of heather leaf powder, add 20 mL of the extractant prepared in step 2), maintain the solid-liquid ratio at 1:20, stir magnetically at room temperature for 6 minutes, and mix the prepared The liquid was microwave-extracted twice in a 50mL airtight container, set the power to 650W, extracted for 3min, collected the extract, and washed the filter residue three times with the extractant.

[0032] 4) The washing liquid and the extr...

Embodiment 2

[0040] 1) Raw material pretreatment: heather leaves are placed in a drying oven at 40° C., dried and pulverized, and passed through a 60-mesh sieve to obtain dry heather leaf powder for use.

[0041] 2) Extractant preparation: 4.9g (NH 4 ) 2 SO 4 Dissolve in 10mL deionized water, add 40mL ethanol, stir for 5min with a stirrer, when the two phases are separated, you can get a concentration of 30% ethanol (w / w) and 23% (NH 4 ) 2 SO 4 concentration (w / w) of the extractant.

[0042] 3) Mix heather leaf powder with extractant: weigh 1.2 g of heather leaf powder, add 30 mL of the extractant prepared in step 2), maintain a solid-liquid ratio of 1:25, stir magnetically at room temperature for 5 minutes, and mix the prepared mixed liquid Microwave extraction was performed twice in a 50 mL airtight container, and the power was set to 700 W for 2 min. The extract was collected, and the filter residue was washed four times with the extractant.

[0043] 4) The washing liquid and the ...

Embodiment 3

[0051] 1) Raw material pretreatment: heather leaves are placed in a drying oven at 40° C., dried and pulverized, and passed through a 50-mesh sieve to obtain dry heather leaf powder for use.

[0052] 2) Extractant preparation: 4.9g (NH 4 ) 2 SO 4 Dissolve in 10mL deionized water, add 40mL ethanol, stir for 5min with a stirrer, when the two phases are separated, you can get a concentration of 30% ethanol (w / w) and 23% (NH 4 ) 2 SO4 concentration (w / w) of the extractant.

[0053] 3) Mix heather leaf powder with extractant: weigh 1.5 g of heather leaf powder, add 36 mL of the extractant prepared in step 2), maintain a solid-liquid ratio of 1:24, stir magnetically at room temperature for 8 minutes, and mix the The liquid was microwave-extracted twice in a 50mL airtight container, set the power to 750W, extracted for 3min, the extract was collected, and the filter residue was washed three times with the extractant.

[0054] 4) The washing liquid and the extracting liquid in st...

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Abstract

The invention relates to the field of preservation of textile relics, and discloses a method for preparing a bacteriostatic textile finishing agent from an ursolic acid extract. A dual-phase extraction method and a microwave-assisted extraction method are combined to be used for shortening the extracting time and improving the extraction efficiency. A mixed solution of a (NH4)2SO4 solution and ethyl alcohol is used as an extracting agent, the viscosity is easily reduced, the diffusivity and the solubility of the liquid are improved, and therefore, the content of extracted ursolic acid is increased. The ursolic acid and nanometer zinc oxide are used as a bacteriostatic agent, and the antibacterial activity of a textile is improved; by adding 3 (trimethoxy silane) propyl dimethyl octadecyl ammonium chloride and 3-imino-N-nitrided acetamidocyclic buty amide in the preparation process of the textile finishing agent, the finishing agent can be chemically bonded with cellulosic fibers and can be polycondensated to form a film, and the antibiotic constituents of the finishing agent have the washability.

Description

technical field [0001] The invention relates to the field of protection of textile cultural relics, in particular to a method for preparing an antibacterial textile finishing agent by using ursolic acid extract. Background technique [0002] Ancient textiles are natural polymer materials. Under natural conditions, microorganisms are ubiquitous, and their fecundity is particularly amazing (about 20 minutes to reproduce one generation). Microorganisms on textiles will multiply rapidly under suitable conditions to form hyphae or mildew spots. Long-term storage Natural fiber textiles will be attacked by microorganisms such as bacteria and moths, resulting in mildew, damage to textiles, holes or even rot, and even cause natural fibers (such as cotton) to degrade or produce foul odors; in addition, dyes are oxidized, It will cause the fabric to lose its original bright colors and reduce its ornamental value. Therefore, it is very important to treat textiles with anti-mold, anti-m...

Claims

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Application Information

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IPC IPC(8): D06M13/207D06M11/44D06M13/513D06M13/418C07J63/00A01N37/36A01N59/16A01P1/00A01P3/00D06M101/06
CPCA01N37/36A01N59/16C07J63/008D06M11/44D06M13/207D06M13/418D06M13/513D06M16/00D06M2101/06
Inventor 彭志勤王晓云刘珉琦黄诗莹万军民王秉
Owner ZHEJIANG SCI-TECH UNIV
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