Dyeing of Cochineal Natural Dye on Cotton Fabrics Treated with Oxidant and Chitosan

Ke Guizhen; Zhu Kundi; Chowdhury Mofasser Haque

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Dyeing of Cochineal Natural Dye on Cotton Fabrics Treated with Oxidant and Chitosan

机译：用氧化剂和壳聚糖治疗的棉织物中的Cochineal天然染料的染色

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Cotton fabrics were modified through an oxidation of the fabric with hydrogen peroxide followed by chitosan to improve their dyeability toward cochineal natural dye. Comprehensive studies were conducted on these fabrics to select chitosan modification process and assess their dyeability to cochineal in the ethanol-water system. The scanning electron micrograph showed the chitosan was deposited on the surface of cotton fiber. The infrared spectrum revealed the interaction between chitosan and cellulose further. Thermal gravity analysis showed the treatment produced little effect on the thermal stability of the cotton fabric. Treating cotton with 15 g/L chitosan and baking at 130 degrees C offered higher cochineal adsorption. Dyeing with increased time and at elevated temperatures resulted in higher dye uptake. The ratio of ethanol and water had obvious effects on solution polarity and when the proportion of ethanol and water was 9:1, cochineal adsorption reached maximum value. pH value had complex effects on K/S value and pH 7 yielded the highest color strength. Dyeing kinetics curves indicated that with the increase of the dyeing temperature, dye diffusion coefficient increased and half dyeing time decreased. The washing and rubbing fastness of the treated cotton fabrics were all improved and rated above grade 3.

机译：通过用过氧化氢氧化织物，然后通过壳聚糖氧化来改变棉织物，以改善其对科基天然染料的可染料。在这些织物上进行了综合研究，以选择壳聚糖改性过程，并评估其在乙醇水系统中的科内科内的可染性。扫描电子显微照片显示壳聚糖沉积在棉纤维表面上。红外光谱揭示了壳聚糖和纤维素之间的相互作用进一步。热重力分析表明，该处理对棉织物的热稳定性产生了很小的影响。用15克/克壳聚糖处理棉和130摄氏度的烘焙提供了更高的内膜吸附。随着时间的推移和升高的温度染色导致更高的染料吸收。乙醇和水的比例对溶液极性具有明显的影响，并且当乙醇和水的比例为9：1时，内切膜吸附达到最大值。 pH值对k / s值具有复杂的影响，pH 7产生最高的色彩强度。染色动力学曲线表明，随着染色温度的增加，染料扩散系数增加，半染色时间减少。经过处理的棉织物的洗涤和摩擦牢度全部得到改善和额定等级。

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来源
《Journal of natural fibers》 |2021年第3期|317-329|共13页
作者
Ke Guizhen; Zhu Kundi; Chowdhury Mofasser Haque;
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作者单位

Wuhan Text Univ State Key Lab Hubei New Text Mat & Adv Proc Techn Yangguang Rd Wuhan 430200 Hubei Peoples R China;

Wuhan Text Univ State Key Lab Hubei New Text Mat & Adv Proc Techn Yangguang Rd Wuhan 430200 Hubei Peoples R China;

Wuhan Text Univ State Key Lab Hubei New Text Mat & Adv Proc Techn Yangguang Rd Wuhan 430200 Hubei Peoples R China;

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正文语种 eng
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关键词
Cochineal; natural dye; cotton fabric; chitosan; dyeing;

机译：Cochineal;天然染料;棉织物;壳聚糖;染色;

Dyeing of Cochineal Natural Dye on Cotton Fabrics Treated with Oxidant and Chitosan

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