Intrinsically magenta-colored aramids with enhanced mechanical performance

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-06-11 DOI:10.1016/j.dyepig.2025.112944

Marta Guembe-García, Saúl Vallejos, José Miguel García, Miriam Trigo-López

{"title":"Intrinsically magenta-colored aramids with enhanced mechanical performance","authors":"Marta Guembe-García, Saúl Vallejos, José Miguel García, Miriam Trigo-López","doi":"10.1016/j.dyepig.2025.112944","DOIUrl":null,"url":null,"abstract":"<div><div>Poly(<em>p</em>-phenylene terephthalamide) (PPTA) and poly(<em>m</em>-phenylene isophthalamide) (MPIA) are highly valued polymers widely used as fibers and textiles, owing to their exceptional mechanical and thermal properties. However, their high crystallinity and dense molecular packing hinder dyeing, limiting their use in applications that require specific coloration. This work presents the design and characterization of intrinsically colored aramids, in which a magenta dye is covalently bonded as a lateral chain to the main backbone of the parent polymers. The resulting materials incorporated 1, 10, 25, and 100 mol% of the structural units containing the dye, and the color hue was proportional to the dye content.</div><div>The results revealed that the introduction of the dye led to a 94 % increase in the Young's modulus, a 35 % increase in the tensile strength, and a 12 % increase in the elongation at break for Ar-25 compared to MPIA. X-ray diffraction analysis revealed the presence of crystalline domains in the synthesized polymers, which would explain the increased mechanical performance of the materials compared to laboratory-synthesized MPIA.</div><div>By incorporating color directly into the polymer backbone, this approach eliminates the need for conventional dyeing of fibers, reducing the environmental impact, while ensuring long-term color stability. Additionally, the magenta color, which is a primary hue, enables the formulation of a broad spectrum of shades. These findings pave the way for advanced aramid-based materials for fiber-related applications, with enhanced mechanical properties and customizable coloration, expanding their potential in textiles, protective gears, and high-performance structural applications.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"242 ","pages":"Article 112944"},"PeriodicalIF":4.2000,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dyes and Pigments","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0143720825003146","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

Abstract

Poly(p-phenylene terephthalamide) (PPTA) and poly(m-phenylene isophthalamide) (MPIA) are highly valued polymers widely used as fibers and textiles, owing to their exceptional mechanical and thermal properties. However, their high crystallinity and dense molecular packing hinder dyeing, limiting their use in applications that require specific coloration. This work presents the design and characterization of intrinsically colored aramids, in which a magenta dye is covalently bonded as a lateral chain to the main backbone of the parent polymers. The resulting materials incorporated 1, 10, 25, and 100 mol% of the structural units containing the dye, and the color hue was proportional to the dye content.

The results revealed that the introduction of the dye led to a 94 % increase in the Young's modulus, a 35 % increase in the tensile strength, and a 12 % increase in the elongation at break for Ar-25 compared to MPIA. X-ray diffraction analysis revealed the presence of crystalline domains in the synthesized polymers, which would explain the increased mechanical performance of the materials compared to laboratory-synthesized MPIA.

By incorporating color directly into the polymer backbone, this approach eliminates the need for conventional dyeing of fibers, reducing the environmental impact, while ensuring long-term color stability. Additionally, the magenta color, which is a primary hue, enables the formulation of a broad spectrum of shades. These findings pave the way for advanced aramid-based materials for fiber-related applications, with enhanced mechanical properties and customizable coloration, expanding their potential in textiles, protective gears, and high-performance structural applications.

Abstract Image

查看原文本刊更多论文

固有洋红色芳纶，具有增强的机械性能

聚对苯对苯二甲酰胺（PPTA）和聚间苯对苯二甲酰胺（MPIA）由于其优异的机械和热性能，被广泛用于纤维和纺织品。然而，它们的高结晶度和致密的分子填料阻碍了染色，限制了它们在需要特定着色的应用中的使用。这项工作提出了固有着色芳纶的设计和表征，其中品红染料作为一个侧链共价键到母体聚合物的主骨架。所得到的材料含有含有染料的结构单元的1、10、25和100 mol%，并且颜色色调与染料含量成正比。结果表明，与MPIA相比，染料的引入使Ar-25的杨氏模量提高了94%，抗拉强度提高了35%，断裂伸长率提高了12%。x射线衍射分析显示，合成的聚合物中存在晶体域，这可以解释与实验室合成的MPIA相比，材料的机械性能有所提高。通过将颜色直接结合到聚合物骨架中，这种方法消除了对纤维的传统染色的需要，减少了对环境的影响，同时确保了长期的颜色稳定性。此外，洋红色，这是一个主要色调，使制定一个广泛的色调。这些发现为用于纤维相关应用的先进芳纶基材料铺平了道路，这些材料具有增强的机械性能和可定制的颜色，扩大了它们在纺织品、防护装备和高性能结构应用中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.