实现染料的绿色合成和染色过程对于纺织业行业的可持续性和环境友好至关重要。为了调查这一潜力，来自中国科学家团队在《期刊》中发表了一篇论文，目前处于预期阶段。染料和颜料。
学习：Cleaner production of disperse florescent dyes in supercritical CO2以及它们在染色聚酯织物中的应用。Image Credit: Fluke Cha/Shutterstock.com
纺织染色：环境有害过程
The global textiles industry is worth nearly one trillion dollars. With the rapid growth in the world population over the past few decades, there is a need for high-quality fabrics for domestic and industrial purposes.
但是，随着这种快速增长以及对全球纺织品行业的需求，环境破坏和可持续性构成了一个巨大的问题。合成染料在现代纺织品行业中受到青睐，它们的合成成本昂贵，精力充沛，资源密集型。大量的废水是由纺织工厂产生的，将有毒的有机溶剂浸入环境中，它们可以积累并对海洋生物和人类造成巨大污染和损害。
The environmental damage of the textiles industry has been well-documented in recent years, and the urgent and pressing need to mitigate the harm caused by the dyeing and production of fabrics and textiles has facilitated the search for alternative dyes, synthesis, and dyeing methods. Furthermore, there is a pressing need for non-toxic, biodegradable, and sustainable solvents in the dyeing industry.
超临界公司2
超临界公司2is produced from CO2by applying pressure and temperature. This chemical possesses several advantageous properties for use as a solvent in dyeing processes, including low viscosity, lack of toxicity, and high permeability and solubility. It has been explored for several applications, including enzymatic reactions and styrene oxidation.
近年来，已广泛探索了这种化学物质作为溶剂的使用。以这种方式使用该化学物质解决了全球纺织品行业的主要经济和环境挑战，包括解决由于无水过程而解决的废水污染物问题。此外，它为合成染料和染色纺织品的更清洁方法打开了大门。
Since the late 1980s, several studies have been performed into the use of this chemical as a solvent for use in dyeing methods. However, many studies have still used common synthetic dyes which are typically synthesized or purchased before dyeing. Realizing a truly green process has so far eluded researchers.
研究
该研究使用超临界CO进行了研究2作为合成和染色步骤的介质，以促进同步方法的发展。
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作者指出，发现与此方法兼容的染料是实现这种同步绿色技术的关键。在当前文献中，偶氮染料被广泛认为是最合适的染料类型。但是，使用这些染料存在一个主要问题，这使得不可能使用SuperClitical Co正确合成它们2。
The issue is one of temperature. The formation of intermediate azo salts is an important step in the synthesis of these dyes. This reaction occurs at a much lower temperature than the temperature required for supercritical CO2形成。
However, there are other types of dyes that are more suitable for this process. These include fluorescent dyes such as coumarin and derivatives of naphthalimide. These types of dye possess superior solubility in this solvent. Whilst they have been the subject of a few studies already reported in the current literature, previous research has still synthesized these dyes using organic solvents.
这些染料的另一个问题是它们的制备方法。将硝基减少到氨基是最常用的氨基，这对环境极为有害。
在研究中，作者将前体与硝基组合成，然后使用超临界CO催化减少2。该过程产生具有优质光物理特性的荧光染料。作者将其研究中提出的同步方法与常用的逐步过程进行了比较，并证明了他们的方法是优越的。
此外，作者还研究了在最佳条件下诸如阳光和日常使用之类的因素，以响应颜色快速染色的材料。欧洲杯足球竞彩他们的分析结果是有希望的。
根据研究中实验性观察的结果，这种新颖的过程可以帮助促进更可持续和绿色的纺织品行业的发展。这将符合行业在未来几十年中与国际协议一致的承诺，以减少其环境损失。
超临界公司2是一种非常有用的化学物质，已经用于多种目的，这项研究证明了其适合溶剂的溶剂，可用于染料的绿色合成和染料材料的染色，这将对整个纺织品行业产生巨大影响。
进一步阅读
Hou, J et al. (2022)Cleaner production of disperse florescent dyes in supercritical CO2以及它们在染色聚酯织物中的应用[在线，预处理]染料和颜料110250 |欧洲杯线上买球ScienceDirect.com。可用网址：https://www.欧洲杯线上买球sciendirect.com/science/article/abs/pii/s0143720822001723
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