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Quantitative determination method for natural colored cotton fiber blending ratio

A technology of natural colored cotton and fiber blending, which is applied in the measurement of color/spectral properties, etc., can solve the problems of low accuracy of experimental results, destructive samples, and unsuitable for analyzing small batch samples, and achieves the effect of strong operability.

Active Publication Date: 2013-04-24
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the detection cycle of the chemical dissolution method and the microscope method is very long, and the requirements for the detection environment are high. The chemical reagents to be used are toxic and harmful, causing great pollution to the environment, high detection costs, and high requirements for the technology and experience of the detection personnel. , while the detection process must be destructive to the sample
The near-infrared method also has many shortcomings. 1. It requires a large number of representative samples with known chemical values ​​to build a model, which is not suitable for analyzing small batch samples; 2. The accuracy of the experimental results is not high; 3. The model needs to be constantly updated , due to the change of the instrument state or the change of the standard sample, the model needs to be changed accordingly
In short, the existing detection methods do not make the quantitative analysis of natural colored cotton products simple, convenient and environmentally friendly.

Method used

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  • Quantitative determination method for natural colored cotton fiber blending ratio
  • Quantitative determination method for natural colored cotton fiber blending ratio
  • Quantitative determination method for natural colored cotton fiber blending ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]First, ordinary white cotton fiber and natural green cotton fiber (produced by the Cotton Research Institute of Zhejiang Academy of Agricultural Sciences) are crushed into fiber powders of more than 80 meshes, and then the two fiber powders are mixed evenly in a certain proportion. A certain proportion refers to the percentage of the mass of natural green cotton fiber powder in the mass of the mixed powder, which are 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%, respectively. Then use the ultraviolet-visible spectrophotometer with integrating sphere accessories to measure the ultraviolet diffuse reflectance spectrum, so as to establish the relationship curve between reflectivity and wavelength under different mixing ratios, as shown in figure 1 . Then establish the correlation curve of reflectance y and fiber powder ratio x at different wavelengths, such as figure 2 . details as follows:

[0045] At 250nm, y=-9.2579Ln(x)+1.6537, the square of the correlation...

Embodiment 2

[0074] Firstly, ordinary white cotton fiber and natural brown cotton fiber (produced by the Cotton Research Institute of Zhejiang Academy of Agricultural Sciences) are crushed into fiber powders of more than 80 meshes, and then the two fiber powders are mixed evenly in a certain proportion. A certain proportion refers to the percentage of the mass of natural brown cotton fiber powder in the mass of the mixed powder, which are 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%, respectively. Then use the ultraviolet-visible spectrophotometer with integrating sphere accessories to measure the ultraviolet diffuse reflectance spectrum, so as to establish the relationship curve between reflectivity and wavelength under different mixing ratios, as shown in image 3 . Then establish the correlation curve of reflectance y and fiber powder ratio x at different wavelengths, such as Figure 4 . Specifically:

[0075] At 250nm, y=-8.3181Ln(x)-0.2914, the square of the correlation co...

Embodiment 3

[0093] First, ordinary white polyester and natural brown cotton (produced by the Cotton Research Institute of Zhejiang Academy of Agricultural Sciences) fibers are crushed into fiber powders of more than 80 meshes, and then the two fiber powders are mixed evenly in a certain proportion. A certain proportion refers to the percentage of the mass of natural brown cotton fiber powder in the mass of the mixed powder, which are 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%, respectively. Then use the ultraviolet-visible spectrophotometer with integrating sphere accessories to measure the ultraviolet diffuse reflectance spectrum, so as to establish the relationship curve between reflectivity and wavelength under different mixing ratios, as shown in Figure 5 . Then establish the correlation curve of reflectivity and fiber powder ratio at different wavelengths, such as Figure 6 . Specifically:

[0094] At 450nm, y= -12.447Ln(x)+6.3317, the square of the correlation coeffic...

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Abstract

The invention discloses a quantitative determination method for natural colored cotton fiber blending ratio and uses a blending product composed of a natural colored cotton fiber and a white fiber as object to be tested. The method comprises the following steps: (a), respectively smashing the natural colored cotton fiber and the white fiber; and (b), mixing evenly the powder of the natural colored cotton fiber and the powder of the white fiber according to echelonment proportion; and (c), performing ultraviolet diffuse reflection spectrometry on mixture with different fiber blended ratio and powder of pure natural colored cotton fiber, so that the corresponding graph-of-relation of reflectivity and wavelength is established; and (d) analyzing the correlation of reflectivity and fiber blended ratio under different wavelengths, so that the quantitative calculation model of correlation quantitation is established; and (e), selecting a characteristic wavelength; and (f) using the selected characteristic wavelength to determinate the ultraviolet diffuse reflectance of the object to be tested, and calculating the blended ratio of the object to be tested through the selected quantitative calculation model.

Description

technical field [0001] The invention relates to a quantitative method for the blending ratio of blended fibers, in particular to a method for measuring the fiber blending ratio in natural colored cotton blended yarns. Background technique [0002] Natural colored cotton is a kind of cotton fiber which has natural color itself and can be directly woven into textiles with natural color without dyeing. Textile garments produced with natural colored cotton fibers have the advantages of comfortable wearing, natural color, soft and elegant, green and environmental protection, etc., and have broad development prospects. Due to the poor quality of natural colored cotton fibers, the natural colored cotton products currently on the market are basically blended products of natural colored cotton fibers and other fibers, mainly blended with white cotton fibers. The purpose of blending is mainly to improve the performance of yarns, improve the performance of products or achieve some spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25
Inventor 唐志荣胡雪峰周文龙张健于剑锋虞鹤群章琪超
Owner ZHEJIANG SCI-TECH UNIV
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