CN109238976B - Detection method of photochromic textile - Google Patents
Detection method of photochromic textile Download PDFInfo
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- CN109238976B CN109238976B CN201811050908.8A CN201811050908A CN109238976B CN 109238976 B CN109238976 B CN 109238976B CN 201811050908 A CN201811050908 A CN 201811050908A CN 109238976 B CN109238976 B CN 109238976B
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
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Abstract
The invention provides a method for detecting photochromic textiles, which adopts standard sunlight as an excited color-changing light source to measure the color-changing chromatic aberration of the photochromic textiles after being excited by the sunlight and the recovery chromatic aberration of the photochromic textiles after the excitation light source is removed, thereby evaluating the color-changing performance of the photochromic textiles. The invention solves the detection problem of the current photochromic textiles, and can effectively test the color change performance of the photochromic textiles, including color change and color difference and color change simulation color. The method has the advantages of simplicity, easy operation, standardization and the like.
Description
Technical Field
The invention relates to a method for detecting a textile, in particular to a method for detecting the color-changing performance of a photochromic textile.
Background
With the continuous introduction of high and new technologies, the color-changing textile is used as a high-technology functional textile which is rapidly developed and extremely rich in vitality in recent years, is endowed with higher added value and benefit due to the beauty, the smell and the non-toxicity, and has good development prospect and wide application prospect.
The photochromic textile is the most applied and mature photochromic textile, and a sample is discolored under the excitation of ultraviolet-visible light wave bands, such as from indoor to outdoor and from shady to sunlight, and the original color is recovered when light disappears. Reversibility, high color change speed, bright color, easy excitation and wide application range are special attributes of the textiles. At present, in the textile sales market of China, commercialized photochromic textiles comprise dozens of forms of color-changing T-shirts, color-changing sleeves, color-changing skin clothes, color-changing sun-rain umbrellas and the like, and the accumulated annual sales volume of electricity merchants is nearly million yuan.
However, with the advent of a large number of photochromic textiles, no research and related reports on detection methods and technical indexes are available, and in many reports, the performance of different photochromic products is evaluated only by using outdoor sunlight for irradiation or using 'good color change' or 'poor color change' as an index, so that the standards and the professions are insufficient. Therefore, the research and establishment of the standard detection method of the photochromic textile can better guide the production of enterprises and the consumption of consumers, provide technical support for the industry and ensure the quality safety of the novel functional textile.
Disclosure of Invention
The invention aims to provide a method for detecting the color-changing performance of photochromic textiles, which aims to solve the problem of the existing method for detecting the non-photochromic textiles.
The invention provides a detection method of a photochromic textile, which is characterized in that standard sunlight is used as an excited color-changing light source, and the color-changing chromatic aberration of the photochromic textile after being excited by the sunlight and the recovery chromatic aberration of the photochromic textile after the excitation light source is removed are measured, so that the color-changing performance of the photochromic textile is evaluated.
More specifically, the invention provides a method for detecting a photochromic textile, which is characterized by comprising the following steps:
(1) placing a test sample of the photochromic textile under standard sunlight serving as an excitation light source for irradiating for 5-30 min; (2) after the excitation light source is removed, measuring the color difference of the color change between the test sample irradiated in the step (1) and the standard sample by using human eyes and/or an instrument; (3) shading the test sample and the standard sample in the step (2) and storing for 20-90 min; (4) measuring the recovery color difference between the test sample and the standard sample after shading and storing in the step (3) by using human eyes and/or an instrument;
the standard sample in the step is a raw sample of the photochromic textile.
Further, the spectrum of the standard sunlight corresponds to AM1.5 spectral distribution, and the irradiance is 1000W/m on an inclined plane forming 37 degrees with the horizontal plane 2 It is called standard sunlight (1 sun for short).
Further, according to the detection method of the photochromic textile, a light source used in human eye measurement is a TL84 standard light source, and a light source used in instrument measurement is a D65 light source to turn off UV.
Further, the method for detecting the photochromic textile of the invention cuts 4 samples from the photochromic textile when the human eye is used for measuring the color difference, the size is (5 multiplied by 10) cm, the color change part in the samples is not less than 4mm, the same color change effect is achieved, 1 sample is taken as a standard sample, and the other 3 samples are taken as test samples; when the instrument is used for measuring the color difference, only 3 samples can be cut from the photochromic textile as test samples, the size is (5 multiplied by 10) cm, the color change part in the samples is not less than 4mm, the same color change effect is achieved, any 1 sample is taken as a standard sample, and the instrument is used for measuring the color standard value. If the color-changing part of the sample is not uniformly coated, the number of the samples can be increased according to actual requirements.
Further, according to the detection method of the photochromic textile, the test result is the average value of the measurement results of all test samples.
Further, the method for detecting the photochromic textile further comprises the step of placing the test sample and the standard sample in standard atmosphere specified in GB/T6529 for adjusting for 0.5-12 h before testing.
Preferably, in the step (1), the standard sunlight can be simulated by using a xenon lamp light source and an AM1.5 filter, and the irradiance of the standard sunlight is 1000W/m by adjusting the current of the light source and the distance from the light source to the sample 2 。
Preferably, in the step (1), the test samples are respectively placed on a neutral gray card, so that the uniform ground color of the test samples is ensured, and the test samples are irradiated for 5-10 min under standard sunlight.
Preferably, in the step (3), the sample is preserved in a dark place for 30-60 min.
Preferably, in the steps (2) and (4), when the color difference is measured by using the human eye, the light source is a TL84 standard light source, and the measurement of the color difference of the color change (color change sample-standard sample) and the color difference of the color recovery (recovery sample-standard sample) is performed under the standard light source TL84 by using a gray sample card for evaluating the color change.
Preferably, in the steps (2) and (4), when the color difference is measured by using an instrument, if a spectrocolorimeter is used for detection, the light source is a D65 light source, the UV is turned off, the color value is measured under the condition that the UV is turned off by a D65 light source, and the color difference value and the simulated color are given at the same time.
The detection method of the photochromic textile provided by the invention has the following advantages:
(1) the adopted standard simulation light source is basically consistent with the solar irradiance in summer in common areas of China and is representative; (2) the sunlight in the nature is not needed to be used as an excitation light source, so that the detection can be carried out at any time and any place without being influenced by the time of environmental regions; (3) the method comprises a subjective and objective detection method, a subjective method (human eye rating) is simple and easy to operate, an objective method (instrument rating) is accurate, and the given simulated color is directly clear; (4) the measurement of the color-changing difference and the color-restoring difference can simultaneously give the measurement results of the color-changing performance and the color-restoring performance of the photochromic textile, and comprehensively evaluate the overall performance of the photochromic textile; (5) the detection method has strong repeatability, the repetition rate reaches more than 95%, and the accuracy is high; (6) the test instruments, materials and processes can all be standardized.
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FIG. 1 is a photochromic sample used in the examples.
FIG. 2 is a rating of a photochromic textile anthropometric method.
FIG. 3 is a rating of a photochromic textile machine assay.
Detailed Description
In order to make the disclosure more thorough and complete, preferred embodiments of the present invention are described in detail below. However, it should be understood by those skilled in the art that the following examples are not intended to limit the scope of the present invention.
Example 1: photochromic textile color-changing function human eye detection method.
The method comprises the following specific steps:
4 samples (5 x 10) cm in size are prepared, the color change parts in the samples are required to have consistent color change effect and are not less than 4mm, wherein 1 sample is used as a standard sample, and the other 3 samples are used as test samples. Before the test, the test sample and the standard sample are placed under the standard atmosphere specified in GB/T6529 and are adjusted for 12 hours.
Respectively placing 3 test samples on neutral gray color cards, placing the neutral gray color cards under a xenon lamp light source provided with an AM1.5 optical filter, adjusting the current and the distance between the xenon lamp light source and the samples until the simulated solar irradiance is standard sunlight, and turning on the light source to irradiate the test samples for 5 min.
After the light source is turned off, 3 test samples are taken out quickly and placed in a standard color matching lamp box together with the standard samples, and a standard light source TL84 is used in the standard color matching lamp box. And measuring the color difference of the color change by using a gray sample card for evaluating the color change, recording the measurement result, and taking the average value of the measurement results of all 3 samples as the color difference of the color change.
And (3) storing the 3 test samples and the standard sample for 30min in a shading mode, then respectively measuring the recovery color difference of the test samples under a TL84 standard light source, and taking the average value of the measurement results of all 3 samples as the result of the recovery color difference.
The results of the human eye measurements for the 6 photochromic textiles shown in fig. 1 are presented in fig. 2, and the adjustment time 12h, the irradiation time 5min, and the recovery time 30min are noted in the test report.
Example 2: and (3) performing instrumental detection on the color change function of the photochromic textile.
The method comprises the following specific steps:
3 (5X 10) cm-sized test samples are prepared, and the color change parts in the samples are required to have consistent color change effect and are not less than 4 mm.
Before the test, all test samples are placed under the standard atmosphere specified in GB/T6529 and are adjusted for 10 h.
First, 1 sample is taken, and a hand-held spectrocolorimeter is used for measuring the CIE tristimulus value of the photochromic sample under the conditions of a D65 standard light source, a 10-degree visual field angle and UV off to be used as a standard value.
And (3) respectively placing the 3 test samples on neutral gray color cards, adjusting the current and the distance between the xenon lamp light source and the samples until the simulated solar light irradiance is standard sunlight, and turning on the light source to irradiate the test samples for 5 min.
And (3) quickly taking out the 3 test samples after the light source is turned off, measuring the CIE tristimulus values of the photochromic samples under the same conditions by using the handheld light-splitting color measuring instrument, calculating to obtain the corresponding gray card number of the photochromic samples, and taking the average value of the measurement results of all the 3 samples as the result of the color change and the color difference.
And (3) storing the 3 test samples for 30min in a shading mode, respectively measuring the recovery color difference of the test samples by using a handheld spectrocolorimeter, and taking the average value of the measurement results of all the 3 samples as the result of the recovery color difference.
The results of the human eye measurements for the 6 photochromic textiles shown in fig. 1 are presented in fig. 3, which correspondingly give simulated colors for the standard sample, the photochromic sample and the restorative sample. And the regulation time of 10h, the irradiation time of 5min and the recovery time of 30min are indicated in the detection report.
Example 3:
the present example is different from example 1 in that: the conditioning time was 0.5h, the irradiation time was 10min, the recovery time was 60min, and the specific parameter values are given in the report, with the other steps and parameters the same as in example 1.
Example 4:
the present embodiment is different from embodiment 2 in that: the adjustment time 2h, irradiation time 10min, recovery time 60min and the specific parameter values given in the report, other steps and parameters were the same as in example 2.
Claims (8)
1. The method for detecting the photochromic textile is characterized in that standard sunlight is used as an excited color-changing light source, and color-changing chromatic aberration of the photochromic textile after being excited by the sunlight and color-restoring chromatic aberration of the photochromic textile after an excitation light source is removed are measured, so that the color-changing performance of the photochromic textile is evaluated, and the method specifically comprises the following steps:
(1) placing a test sample of the photochromic textile under standard sunlight serving as an excitation light source for irradiating for 5-30 min; (2) after the excitation light source is removed, measuring the color difference of the color change between the test sample irradiated in the step (1) and the standard sample by using human eyes and an instrument; (3) shading the test sample and the standard sample in the step (2) and storing for 20-90 min; (4) measuring the recovery color difference between the test sample and the standard sample after shading storage in the step (3) by using human eyes and an instrument;
the standard sample is an original sample of the photochromic textile;
wherein, the standard sunlight isThe spectrum corresponds to the AM1.5 spectral distribution with an irradiance of 1000W/m on an inclined plane at 37 DEG to the horizontal 2 ；
In the steps (2) and (4), when the color difference is measured by human eyes, the adopted light source is a TL84 standard light source, and a gray sample card for evaluating color change is used for measuring the color difference of color change and color difference recovery; when the light splitting color measuring instrument is used for detection, the light source is a D65 light source, UV is turned off, and analog colors of primary colors, color change and recovery colors are provided.
2. The method for detecting the photochromic textile according to claim 1, wherein the standard sunlight is simulated by using a xenon lamp light source and an AM1.5 filter.
3. The method for detecting photochromic textiles as claimed in claim 1, wherein the color difference is measured by human eyes, 4 samples with a size of (5 x 10) cm are cut from the photochromic textiles, the color-changing part in the samples is not less than 4mm, 1 sample is taken as a standard sample for the same color-changing effect, and the other 3 samples are taken as test samples.
4. The method for detecting photochromic textiles as claimed in claim 1, wherein the color difference is measured by an instrument, 3 samples are cut from the photochromic textiles as test samples, the size is (5 x 10) cm, the color change part in the samples is not less than 4mm, and the same color change effect is achieved.
5. The method for testing photochromic textiles of any of claims 1, 3 or 4 wherein the test results are averaged over all test sample measurements.
6. The method for detecting the photochromic textile according to claim 1, further comprising the step of placing the test sample and the standard sample under a standard atmosphere specified in GB/T6529 for adjusting for 0.5-12 h before the test.
7. The method for detecting the photochromic textile according to claim 1, wherein in the step (1), the test samples are respectively placed on a neutral gray card, so that the base colors of the test samples are uniform, and the test samples are irradiated under standard sunlight for 5-10 min.
8. The method for detecting photochromic textiles as claimed in claim 1, wherein in the step (3), the sample is preserved in the dark for 30-60 min.
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