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Method for testing fresh cocoon raw silk by adopting polarizing microscope

A polarizing microscope and detection method technology, applied in the direction of material analysis, measuring devices, instruments, etc. through optical means, can solve the problems of cocoon silk performance differences, effectively identify fresh cocoon raw silk and dry cocoon raw silk, etc., achieve convenient operation, Promote high-quality, efficient production and low-cost effects

Inactive Publication Date: 2013-06-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fresh cocoon raw silk is subjected to less high-temperature heat treatment during processing, and the properties of cocoon silk are somewhat different from those of dry cocoon raw silk, which will bring confusion to the current silk processing enterprises in choosing raw silk raw materials
At present, there is no method on the market that can quickly and effectively identify raw cocoon silk and raw cocoon silk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Take sample 1 raw silk, cut a section of raw silk about 3cm, put it on a glass slide, add a drop of glycerin, cover with a cover glass, and make a raw silk slide;

[0020] (2) Observe the raw silk slide under a polarizing microscope, first find the silk fibroin fiber under a low-power objective lens (10×), and then switch to a high-power objective lens (40×) for observation;

[0021] (3) The upper polarizer (analyzer) is perpendicular to the lower polarizer (polarizer), and the field of view is dark at this time, while the silk fiber presents a bright and vivid color image;

[0022] (4) Take pictures of the observed silk fibers and save photo a;

[0023] (5) Take sample 2 raw silk, follow steps (1), (2), (3), and (4), observe sample 2 raw silk with a polarizing microscope, take pictures and save photo b;

[0024] (6) Observation and analysis show that the smoothness of the fiber surface in photo a is good, and there are few sericin particles on the fiber surface, i...

Embodiment 2

[0026] (1) Take sample 3 raw silk, cut a section of raw silk about 3cm, place it on a glass slide, add a drop of glycerin, cover with a cover glass, and make a raw silk slide;

[0027] (2) Observe the raw silk slide under a polarizing microscope, first find the silk fibroin fiber under a low-power objective lens (10×), and then switch to a high-power objective lens (40×) for observation;

[0028] (3) The upper polarizer (analyzer) is perpendicular to the lower polarizer (polarizer), and the field of view is dark at this time, while the silk fiber presents a bright and vivid color image;

[0029] (4) Take pictures of the observed silk fibroin fibers and save photo c;

[0030] (5) Take sample 4 raw silk, follow steps (1), (2), (3) and (4), observe sample 4 raw silk with a polarizing microscope, take pictures and save photo d;

[0031] (6) Observation and analysis show that the smoothness of the fiber surface in photo c is good, and there are few sericin particles on the fiber s...

Embodiment 3

[0033] (1) Take sample 5 raw silk, cut a section of raw silk about 3cm, place it on a glass slide, add a drop of glycerin, cover with a cover glass, and make a raw silk slide;

[0034] (2) Observe the raw silk slide under a polarizing microscope, first find the silk fibroin fiber under a low-power objective lens (10×), and then switch to a high-power objective lens (40×) for observation;

[0035] (3) The upper polarizer (analyzer) is perpendicular to the lower polarizer (polarizer), and the field of view is dark at this time, while the silk fiber presents a bright and vivid color image;

[0036] (4) Take pictures of the observed silk fibroin fibers and save the photo e;

[0037] (5) Take sample 6 raw silk, follow steps (1), (2), (3), and (4), observe sample 6 raw silk with a polarizing microscope, take pictures and save the photo f;

[0038] (6) Observation and analysis show that the smoothness of the fiber surface in photo e is good, and there are few sericin particles on th...

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Abstract

The invention relates to a method for testing fresh cocoon raw silk, and specifically discloses a method for testing appearance of fresh cocoon raw silk by adopting a polarizing microscope for distinguishing fresh cocoon raw silk from dry cocoon raw silk. The method for testing the fresh cocoon raw silk by adopting the polarizing microscope comprises the following steps of: cutting out a section of raw silk of about 3cm from the raw silk of an unknown sample, placing the cut raw silk on a glass slide, dropping a drop of glycerol, and covering the glass slide with cover glass to form a raw silk slide; and placing the raw silk slide under the polarizing microscope for observation, finding the raw silk fiber under a low-power objective (10x), and then, changing to a high-power objective (40x) for observation. In the method provided by the invention, the polarizing microscope is used for observing and photographing the raw silk, and the fresh cocoon raw silk is distinguished from the dry cocoon raw silk according to the smoothness of the fiber surface in a raw silk polarized image and the amount of sericin particles. The method has the advantages of being simple, easy and efficient, convenient to operate, low in cost and high in efficiency, and so on, is beneficial for selection of high-quality raw silk raw materials by silk weaving enterprises, and promotes high-quality and high-efficiency production of the silk weaving enterprises.

Description

technical field [0001] The invention relates to a detection method for fresh cocoon raw silk, in particular to a method for inspecting the appearance of fresh cocoon raw silk and distinguishing fresh cocoon raw silk and dried cocoon raw silk by using a polarizing microscope. [0002] Background technique [0003] Fresh cocoon raw silk is reeled from fresh silkworm cocoons directly by vacuum infiltration and low-temperature cooking, or fresh silkworm cocoons are stored in a freezer and then vacuum-infiltrated and low-temperature boiled. Dried cocoon raw silk is raw silk reeled from dried silkworm cocoons that have been dried at high temperature by vacuum infiltration and high temperature cocoon cooking. Therefore, compared with dry cocoon raw silk, fresh cocoon raw silk has the advantages of reduced process, cost saving and labor reduction in raw material processing and silk reeling processing. However, fresh cocoon raw silk is subjected to less high-temperature heat treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84
Inventor 朱良均刘小甜张海萍杨明英邢秋明冯建强
Owner ZHEJIANG UNIV
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