Loquat leaf pigment as well as extraction method and application thereof

A loquat leaf and pigment technology, applied in the textile field, can solve problems such as environmental pollution, poor market competitiveness, and increased labor costs, and achieve the effects of improving extraction efficiency and broadening application fields.

Active Publication Date: 2021-07-02
CHANGZHOU TEXTILE GARMENT INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extraction efficiency of natural pigments in loquat leaves is low and cannot be fully utilized, so it is very important to improve the extraction efficiency of natural pigments in loquat leaves
[0004] At present, the biodegradability of ultraviolet absorbers is poor or the combination of ultraviolet shielding agents and cellulose fibers will affect the air permeability and hand feel of fabrics. At the same time, in the field of synthetic dyes and synthetic drugs, some toxic and hazardous chemical reagents are restricted. The synthesis of products will also cause problems such as environmental pollution, increased labor costs, and poor market competitiveness.

Method used

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  • Loquat leaf pigment as well as extraction method and application thereof
  • Loquat leaf pigment as well as extraction method and application thereof
  • Loquat leaf pigment as well as extraction method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Wash the loquat leaves, dry them, and pack them in plastic bags. Take 5g of dried loquat leaves and put them into a 100mL beaker, add 50mL of deionized water and sodium bisulfite, raise the temperature to 97°C and stir for 2h, (replenish deionized water in time as the water evaporates during the boiling process). After cooling, filter the extract with a 300-mesh filter, and dilute to 50 mL with deionized water to obtain a 100 g / L loquat leaf pigment extract.

[0026] (2) Use acetic acid to adjust the pH value of the obtained extract to 6 to obtain a loquat leaf pigment solution.

[0027] Table 1 The maximum absorption wavelength and absorbance test results of loquat leaf pigment solution

[0028]

[0029]

[0030] It can be known from Table 1 that the extract obtained by extracting the loquat leaf pigment with sodium bisulfite, and then adjust the pH of the extract to 6 with acetic acid, and the maximum absorption wavelength is 270nm-300nm. With the increase...

Embodiment 2

[0032] The difference from Example 1 is that step (2) uses acetic acid to adjust the pH value of the obtained extract to 7 to obtain a loquat leaf pigment solution.

[0033] Table 2 The maximum absorption wavelength and absorbance test results of loquat leaf pigment solution

[0034]

[0035] It can be known from Table 2 that the extract obtained by extracting the loquat leaf pigment with sodium sulfite is then adjusted to pH 7 with acetic acid, and the maximum absorption wavelength is 270nm-300nm. The absorbance of loquat leaf pigment solution at pH 7 is slightly larger than that of loquat leaf pigment solution at pH 6.

Embodiment 3

[0037] The difference from Example 1 is that step (2) uses sodium carbonate solution to adjust the pH value of the obtained extract to 8 to obtain a loquat leaf pigment solution.

[0038] Table 3 The maximum absorption wavelength and absorbance test results of loquat leaf pigment solution

[0039]

[0040] It can be seen from Table 3 that the extract obtained by extracting the loquat leaf pigment with sodium sulfite is then adjusted to a pH of 8 with sodium carbonate solution, and the maximum absorption wavelength is 270nm-300nm. The absorbance of loquat leaf pigment solution pH 8 is slightly smaller than that of loquat leaf pigment solution pH 7.

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PUM

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Abstract

The invention provides loquat leaf pigment and an extraction method and application thereof, and belongs to the technical field of textile, and the extraction method of the loquat leaf pigment comprises the following steps: extracting loquat leaves under the action of a reducing agent to obtain extract liquor, and adjusting the pH value of the extract liquor to obtain a loquat leaf pigment solution. The invention provides a reasonable process for extracting the loquat leaf pigment solution by using sodium hydrogen sulfite (or sodium sulfite) aqueous solution and adjusting the pH value of the extract, the operation process is simple, and the obtained loquat leaf pigment solution can absorb ultraviolet rays and cannot influence the air permeability and hand feeling of the fabric after being combined with cellulose fibers; the loquat leaf pigment is brown after being adsorbed on the fabric, and has the effects of relieving cough, reducing phlegm, relieving asthma, resisting bacteria, resisting oxidation and resisting aging. Therefore, the loquat leaf pigment fabric has an anti-ultraviolet function and can be made into brown medical textiles.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a loquat leaf pigment and its extraction method and application. Background technique [0002] Nowadays, synthetic dyes and synthetic drugs are facing many problems such as partial toxicity, restricted use of hazardous chemical reagents, environmental pollution, increased labor costs, and poor market competitiveness. Out of the consideration of environmental protection and high-quality development, as well as people's pursuit of ecological products and green production processes, the utilization of natural products (including natural pigments) has re-entered people's vision. Many natural pigments have more advantages than synthetic dyes and synthetic drugs because of their good biodegradability, biological and environmental compatibility, antibacterial, anti-ultraviolet, and anti-oxidation properties. [0003] Loquat leaf pigment is a substance extracted from loquat leaves, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54C09B67/44D06P1/34D06P3/60
CPCC09B61/00C09B67/0096C09B67/0083D06P1/34D06P3/60
Inventor 刘建平
Owner CHANGZHOU TEXTILE GARMENT INST
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