The Sustainable Coloration of Wool Fabric Using Naturally Extracted Dyes from Sappan Heartwood

ABSTRACT

Dyestuffs extracted from naturally originated materials are getting popularity in terms of environment-friendly biobased perspective and awareness. The natural colors were imparted into the wool fabric surface after extraction from sappan wood plants through applying exhaustion dyeing methods. Besides, three mordants (aluminum potassium sulfate (AlK(SO₄)₂, copper sulfate (CuSO₄), and zinc sulfates (ZnSO₄·) were used as mordanting materials for better fixation of extracted dyes on wool fabrics. The colored wool fabrics exhibited better color performances especially at optimum conditions (temperature 80°C, time 60 min, and pH 4.0) in terms of CIE lab values (CIE L* a* b*) and color strength (K/S). Moderate colorfastness results were also achieved without any color fading on wool surfaces. The morphological analysis showed that dyed fabrics surfaces are more uniform than undyed fabric. The FTIR (Fourier transform infrared spectroscopy) spectra confirmed the presence of higher absorptions onto dyed fabric, resulting in a better thermal stability property for dyed fabric. Besides, UV protection of the dyed fabric exhibited a higher UPF value than undyed fabric, which denotes that our utilized dye could enhance the functional property of the wool fabric. Satisfactory mechanical properties also further confirmed the successful application potentiality of greenly synthesized natural colorants on wool fabric.

摘要

从天然材料中提取的染料在环境友好的生物基础观点和意识方面越来越受欢迎. 采用上染法从苏木植物中提取天然色素, 赋予羊毛织物表面天然颜色. 此外, 三种媒染剂 (硫酸铝钾 (AlK (SO4)2), 硫酸铜 (CuSO4) 和硫酸锌 (ZnSO4·)) 被用作媒染剂材料, 以更好地将提取的染料固定在羊毛织物上. 彩色羊毛织物在CIE实验室值 (CIE L*a*b*) 和颜色强度 (K/S) 方面表现出更好的颜色性能, 尤其是在最佳条件下 (温度80°C, 时间60 min, pH 4.0) . 在羊毛表面无任何褪色的情况下, 也可获得中等色牢度结果. 形态分析表明, 染色织物表面比未染色织物更均匀. 傅里叶变换红外光谱 (FTIR) 光谱证实染色织物上存在较高的吸收率, 从而使染色织物具有更好的热稳定性. 此外, 染色织物的紫外线防护显示出比未染色织物更高的UPF值, 这表明我们使用的染料可以提高羊毛织物的功能性能. 良好的力学性能也进一步证实了绿色合成天然着色剂在羊毛织物上的成功应用潜力.

KEYWORDS:

• Coloration
• wool fabric
• sappon wood
• natural dyes
• extraction
• sustainable product

关键词:

• 染色
• 羊毛织物
• 蓝宝石木
• 天然染料
• 萃取
• 可持续产品

Disclosure statement

All authors declare no conflict of interest exists with the publication of this manuscript or its data.

Additional information

Funding

This work was supported by the College of Chemical and Chemistry Engineering, Wuhan Textile University, China; University lab fund.;