Küster Letícia, Porto Bruna, de Aguiar Catia Rosana, Granato Miguel Angelo
Postgraduate Program in Textile Engineering, Federal University of Santa Catarina, Blumenau Campus, Engenheiro Udo Deeke St, 485, Salto do Norte, Blumenau, Santa Catarina 89065-100, Brazil.
ACS Omega. 2025 Jun 27;10(26):28167-28177. doi: 10.1021/acsomega.5c02605. eCollection 2025 Jul 8.
Cotton fibers contain impurities that must be removed before dyeing/printing. Traditional hydrogen peroxide bleaching is energy- and time-intensive, requiring near-boiling temperatures and over 60 min. This study evaluates triacetin, peracetic acid, and performic acid as hydrogen peroxide activators to lower the temperature and process time in cotton bleaching. The best results were achieved with 0.9 g·L triacetin and 1.0 g·L peracetic acid at 80 °C for 30 min, reaching 61.1 Berger whiteness. Subsequent tests revealed a slight color difference in dyeings with triacetin (0.5 Δ CMC2:1) and high dye affinity (103% tinctorial strength) compared to conventionally bleached samples. Lighter colors showed a greater bleaching influence. This result is 97% similar to that of conventional bleaching, suggesting a promising alternative for sustainable textile production. This approach stands out for its ability to reduce processing temperatures and times, resulting in lower energy consumption and greater efficiency while maintaining nearly the same fabric whiteness and dyeing quality as conventional methods. It also provides insights into color sensitivity during bleaching.
棉纤维含有杂质，在染色/印花前必须去除。传统的过氧化氢漂白能耗高、耗时久，需要接近沸腾的温度且超过60分钟。本研究评估了三醋精、过氧乙酸和过甲酸作为过氧化氢活化剂在棉纤维漂白中降低温度和缩短处理时间的效果。在80°C下使用0.9 g·L三醋精和1.0 g·L过氧乙酸处理30分钟可获得最佳效果，白度达到61.1 Berger。后续测试表明，与传统漂白样品相比，使用三醋精漂白的织物染色时颜色略有差异（0.5 Δ CMC2:1）且具有较高的染料亲和力（染色强度为103%）。较浅颜色的织物受漂白影响更大。该结果与传统漂白结果的相似度达97%，表明这是可持续纺织品生产的一个有前景的替代方法。这种方法的突出之处在于能够降低处理温度和时间，从而降低能耗、提高效率，同时保持与传统方法相近的织物白度和染色质量。它还为漂白过程中的颜色敏感性提供了见解。
