A quantitative analysis of cotton/polyester/spandex composite fabricthrough hydrochloric acid-sulfuric acid process

doi:10.19398/j.att.202103015

Abstract

Abstract:

In order to optimize the method of quantitative analysis of cotton/polyester fiber/spandex blend fabric, a hydrochloric acid-sulfuric acid process was designed according to newly issued national standard Textiles-Quantitative Chemical Analysis-Mixtures of Elastane and Some Other Fibers (GB/T 38015—2019): 20% HCl was used to dissolve cotton at 70℃ for 30 min, and then 75% H₂SO₄ was adopted to dissolve spandex at 50 ℃ for 1 h. Next, the mass fraction of each component was obtained according to the mass loss, thus the quantitative analysis of cotton/polyester fiber/spandex blend fabric was completed. In this paper, 10 different specifications of cotton/polyester fiber/spandex blend fabric were quantitatively analyzed through hydrochloric acid-sulfuric acid process, and then compared with the traditional split-75% H₂SO₄ method and DMF-75% H₂SO₄ method. The results revealed that the quality correction coefficient of polyester fiber in 20% HCl (70 ℃, 30 min)was 1.00, and the newly designed hydrochloric acid-sulfuric acid process was proved to be feasible, with the advantages of easy operation and accurate data.

Key words: cotton, polyester fiber, spandex, blend fabric, quantitative analysis

摘要：

为了优化定量分析棉/聚酯纤维/氨纶混纺织物的方法,根据新发布的国标GB/T 38015-2019《纺织品定量化学分析氨纶与某些其他纤维的混合物》设计了盐酸-硫酸法:采用20% HCl在70 ℃,30 min条件下溶解棉,然后用75% H₂SO₄在50 ℃,1 h条件下溶解氨纶,根据质量损失,求得各组分的质量分数,完成棉/聚酯纤维/氨纶混纺织物的定量分析。采用盐酸-硫酸法对10块不同规格的棉/聚酯纤维/氨纶混纺织物进行定量分析,并与传统的拆分-75% H₂SO₄法及DMF-75% H₂SO₄法进行分析比较。结果表明:20% HCl(70 ℃,30 min)中聚酯纤维的质量修正系数为1.00,新设计的盐酸-硫酸法切实可行,并具有操作方便、数据准确等优点。

关键词: 棉, 聚酯纤维, 氨纶, 混纺织物, 定量分析

CLC Number:

TS106.8

ZHANG Hongkang, ZHANG Yunjuan, ZHOU Zhaoyi. A quantitative analysis of cotton/polyester/spandex composite fabricthrough hydrochloric acid-sulfuric acid process[J]. Advanced Textile Technology, 2022, 30(2): 63-67.

张弘康, 张芸娟, 周兆懿. 盐酸-硫酸法定量分析棉/聚酯纤维/氨纶混纺织物的研究[J]. 现代纺织技术, 2022, 30(2): 63-67.

Figures/Tables 4

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100%聚酯纤维织物	平方米质量/(g·m^-2)	棉/聚酯纤维/氨纶混纺织物	平方米质量/(g·m^-2)	氨纶线密度/dtex
白色机织物	83.5	白色机织物	181.2	77.8
红色机织物	103.4	红色机织物	162.6	14.6
棕色机织物	138.0	黑色机织物	109.2	44.4
绿色机织物	80.1	红黑夹色机织物	327.7	71.1
黑色机织物	59.3	牛仔机织物	288.9	8.0
黑色针织物	95.9	黑色针织物	273.1	16.7
黑白夹色针织物	111.6	灰色针织物	264.4	33.3
白色针织物	281.8	蓝色针织物	243.5	22.2
藏青色针织物	323.4	藏青色针织物	268.4	40.0
粉色针织物	117.2	牛仔针织物	281.7	11.9

100%聚酯纤维织物	平方米质量/(g·m^-2)	棉/聚酯纤维/氨纶混纺织物	平方米质量/(g·m^-2)	氨纶线密度/dtex
白色机织物	83.5	白色机织物	181.2	77.8
红色机织物	103.4	红色机织物	162.6	14.6
棕色机织物	138.0	黑色机织物	109.2	44.4
绿色机织物	80.1	红黑夹色机织物	327.7	71.1
黑色机织物	59.3	牛仔机织物	288.9	8.0
黑色针织物	95.9	黑色针织物	273.1	16.7
黑白夹色针织物	111.6	灰色针织物	264.4	33.3
白色针织物	281.8	蓝色针织物	243.5	22.2
藏青色针织物	323.4	藏青色针织物	268.4	40.0
粉色针织物	117.2	牛仔针织物	281.7	11.9

样品	净干含量
白色机织物	棉:55.3%、聚酯纤维:39.1%、氨纶:5.6%
红色机织物	棉:33.0%、聚酯纤维:63.5%、氨纶:3.5%
黑色机织物	棉:21.6%、聚酯纤维:73.2%、氨纶:5.2%
红黑夹色机织物	棉:21.5%、聚酯纤维:75.5%、氨纶:3.0%
牛仔机织物	棉:61.0%、聚酯纤维:36.5%、氨纶:2.5%
黑色针织物	棉:34.5%、聚酯纤维:63.0%、氨纶:2.5%
灰色针织物	棉:13.5%、聚酯纤维:83.9%、氨纶:2.6%
蓝色针织物	棉:57.7%、聚酯纤维:38.3%、氨纶:4.0%
藏青色针织物	棉:62.5%、聚酯纤维:33.4%、氨纶:4.1%
牛仔针织物	棉:45.8%、聚酯纤维:43.9%、氨纶:10.3%

样品	净干含量
白色机织物	棉:55.3%、聚酯纤维:39.1%、氨纶:5.6%
红色机织物	棉:33.0%、聚酯纤维:63.5%、氨纶:3.5%
黑色机织物	棉:21.6%、聚酯纤维:73.2%、氨纶:5.2%
红黑夹色机织物	棉:21.5%、聚酯纤维:75.5%、氨纶:3.0%
牛仔机织物	棉:61.0%、聚酯纤维:36.5%、氨纶:2.5%
黑色针织物	棉:34.5%、聚酯纤维:63.0%、氨纶:2.5%
灰色针织物	棉:13.5%、聚酯纤维:83.9%、氨纶:2.6%
蓝色针织物	棉:57.7%、聚酯纤维:38.3%、氨纶:4.0%
藏青色针织物	棉:62.5%、聚酯纤维:33.4%、氨纶:4.1%
牛仔针织物	棉:45.8%、聚酯纤维:43.9%、氨纶:10.3%

样品	溶解前净重/g	溶解后净重/g	d值	平均d值
白色机织物	1.0134	1.0121	1.0013	1.0029
红色机织物	1.0556	1.0542	1.0013
棕色机织物	1.0738	1.0714	1.0022
绿色机织物	1.0281	1.0269	1.0012
黑色机织物	1.0397	1.0357	1.0039
黑色针织物	1.1040	1.0962	1.0071
黑白夹色针织物	1.1179	1.1151	1.0025
白色针织物	1.0865	1.0833	1.0030
藏青色针织物	1.0410	1.0366	1.0042
粉色针织物	1.0622	1.0595	1.0025