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A kind of detection method of grafting rate of silk

A technology of grafting rate and testing method, which is applied in the detection field, can solve problems such as dependence on test results, inability to use products, identification and quality verification, etc., and achieve the effect of facilitating product quality verification and filling the gap in the industry

Active Publication Date: 2019-01-08
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above test method has certain limitations:
[0009] (1) It can only be tested by the producer. Since the grafting rate is calculated by the weighing method, it can only be applied before and after the silk grafting process, and the test results depend on whether the silk grafting can be accurately weighed. Front and rear weight
[0010] (2) For the users and consumers of grafted silk, the obtained product is a product that has been grafted. Therefore, the above weighing method cannot be used to identify and verify the grafting rate of the product. For application enterprises and consumers, it is very important and urgent to understand and identify the grafting degree of silk

Method used

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  • A kind of detection method of grafting rate of silk
  • A kind of detection method of grafting rate of silk
  • A kind of detection method of grafting rate of silk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] (1), preparation and detection of silk samples with different grafting ratios

[0070] Weigh 0.5g of degummed silk and dry it at 140°C for about 60min until the constant weight is W 1 . Carry out grafting treatment on it, the process is: 200-500% methacrylamide, 3% potassium persulfate, 3% formic acid, the above are the weight of silk, bath ratio 1:50, treat at 85°C for 40min, take samples After washing with water, dry at 140°C until the constant weight is W 2 , calculate its grafting rate according to the weighing method shown in formula 1.

[0071] Formula 1.

[0072] (2) Thermogravimetric analysis and DTG curve peak division processing:

[0073] Adopt Japanese Seiko EXSTAR6000TG / DTA6300 synchronous thermal analyzer, carry out thermogravimetric analysis to the above-mentioned prepared silk samples of different grafting ratios respectively, obtain DTG curve, and use Origin software or XPS software (XPS PEAK4.1) to carry out peak division simulation to it and ge...

Embodiment 2

[0142] Sample sending unit: Zhejiang Yashilin Necktie Clothing Co., Ltd. The silk grafting rate measured by weighing method is 32.48%.

[0143] Samples were taken from four different parts of the sample, and the DTG curve was obtained by thermogravimetric analysis, and the Origin software was used for peak fitting. The results are shown in Figure 22-1 , Figure 22-2 , Figure 22-3 , Figure 22-4 With Table 22-1, Table 22-2, Table 22-3, Table 22-4.

[0144] Origin software peak fitting parameters (detection for the first time) of table 22-1 embodiment 2DTG curve

[0145]

[0146]

[0147] Origin software peak fitting parameters (detection for the second time) of table 22-2 embodiment 2DTG curve

[0148]

[0149] Origin software peak fitting parameters of Table 22-3 embodiment 2DTG curve (the third detection)

[0150]

[0151] Origin software peak fitting parameters (detection for the 4th time) of table 22-4 embodiment 2DTG curve

[0152]

[0153] Adopt the...

Embodiment 3

[0157] Sample sending unit: Zhejiang Babei Necktie Co., Ltd., the grafting rate is 97.66% (weighing method).

[0158] Samples were taken from four different parts of the sample, and the DTG curve was obtained by thermogravimetric analysis, and the Origin software was used for peak fitting. The results are shown in Figure 23-1 , Figure 23-2 , Figure 23-3 , Figure 23-4 With Table 23-1, Table 23-2, Table 23-3, Table 23-4.

[0159] Origin software peak fitting parameters (detection for the first time) of table 23-1 embodiment 3DTG curve

[0160]

[0161] Origin software peak fitting parameters (second detection) of table 23-2 embodiment 3DTG curve

[0162]

[0163] The Origin software peak fitting parameters of Table 23-3 embodiment 3DTG curve (the third detection)

[0164]

[0165]

[0166] The Origin software peak fitting parameters of Table 23-4 embodiment 3DTG curve (the fourth detection)

[0167]

[0168] Adopt the function formula that the present in...

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Abstract

The invention discloses a detection method for a silk grafting rate. The detection method is characterized by comprising the following steps: (1) subjecting to-be-detected grafted silk to thermogravimetric analysis so as to obtain a DTC curve, carrying out peak-differentiating and imitating on the DTC curve, respectively calculating peak areas when a peak position is in a temperature range of 275 to 295 DEG G and of 320 to 330 DEG C and respectively marking the peak areas as S1 and S2; and (2) calculating the grafting rate of the to-be-detected grafted silk according to the formula prescribed in a formula 2, i.e., (grafting rate)% = S1 / S2 * 100%. The detection method provided by the invention reveals the corresponding relationship between the grafting rate and thermogravimetric DTC performance through thermogravimetric analysis and peak-differentiating and imitating and mathematic analysis of the DTC curve; as for silk application and consumers, the detection method facilitates product quality detection, component discrimination and cost accounting, thereby filling in a blank in the industry.

Description

Technical field: [0001] The invention relates to a detection method, in particular to a detection method of silk grafting rate. technical background: [0002] The unique luster, feel and moisture absorption and air permeability of silk fabric make it a high-grade clothing fabric. However, after scouring, the mass of silk will be reduced by about 25%, the diameter of the fibers will become thinner, and the gaps between the silks will increase, resulting in thinner and softer fabrics, easy to fluff, wrinkle, no body bone, and lack of firmness. When silk fiber is used to weave ties, lining cloth, braids, etc., its soft and light performance makes the fabric lack drapability and heavy feeling, and the wrinkle recovery is also poor. Because the existence of these shortcomings makes the consumption demand of silk fabric limited, so it is necessary to meet the demand of consumers by improving the performance of various aspects of silk. Therefore, research on silk fiber weight gai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 钱红飞程双娟
Owner SHAOXING UNIVERSITY
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